AA Credit Rating [Member] A A Credit Rating [Member] AA Credit Rating Accounts Notes And Loans Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accretion Amortization Of Discounts And Premiums Investments Amortization and Accretion of Securities and Unearned Income Accumulated Defined Benefit Plans Adjustment [Member] Net Pension and Other Postretirement Benefit Adjustments Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] Net Unrealized Gains (Losses) on Cash Flow Hedge Designations Accumulated Net Unrealized Investment Gain Loss [Member] Net Unrealized Gains (Losses) on Securities Available for Sale The tax effect for noncredit-related losses recognized in other comprehensive income for debt securities held for which an other-than-temporary-impairment loss has been recognized in the period presented or previously. Accumulated Other Comprehensive Income Loss Debt Securities Adjustment Tax Tax Effect Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Loss Net Of Tax Ending Balance Beginning Balance Accumulated Other Comprehensive Loss Noncredit-related losses recognized in other comprehensive income for debt securities held for which an other-than-temporary-impairment loss has been recognized in the period presented or previously. Accumulated Other Comprehensive Income Loss Noncredit Portion Of Other Than Temporarily Impaired Securities Before Tax Noncredit-related Losses Recognized in OCI Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Debt Securities Amount Recorded in OCI Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income Loss [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Translation Adjustment [Member] Foreign Currency Translation Adjustments Additional Paid In Capital Common Stock Additional Paid-In Capital Additional Paid In Capital [Member] Additional Paid-in Capital Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities: Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net Stock Options and Awards - Tax Benefits This represents Affordable Housing Investment. Affordable Housing Investment Affordable Housing Investments Allocated Share Based Compensation Expense Share-Based Compensation Expense Allowance For Credit Losses On Financing Receivables Table [Text Block] Allowances for Credit Losses and Recorded Investments in Loans and Leases by Segment Allowance For Credit Losses [Text Block] Allowance for Credit Losses Allowance For Loan And Lease Losses Adjustments Net Net (Charge-Offs) Recoveries Allowance For Loan And Lease Losses Foreign Currency Translation Effect of Foreign Exchange Rates Allowance For Loan And Lease Losses Provision For Loss Net Provision for Credit Losses Allowance For Loan And Lease Losses Recoveries Of Bad Debts Recoveries Allowance For Loan And Lease Losses Write Offs Charge-Offs Alt-A Residential Mortgage Backed Securities [Member] Alt A Residential Mortgage Backed Securities [Member] Alt-A Amendment Flag Amendment Flag Amortization Of E S O P Award Stock Options and Awards - Amortization Amortization Of Intangible Assets Amortization expense related to other intangible assets Amortization of Intangibles Amount Of Ineffectiveness On Net Investment Hedges Ineffectiveness from net investment hedges Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Common stock equivalents not included in the computation of diluted earnings per share because their inclusion would have been antidilutive Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Arrangements And Nonarrangement Transactions [Member] Arrangements and Non-arrangement Transactions [Domain] Asset And Liability Management [Member] Asset And Liability Management [Member] Asset And Liability Management Assets Total Assets Assets [Abstract] Assets Assets Fair Value Disclosure Fair Value Asset Assets Net Net assets held by the Funds Auction Rate Securities [Member] Auction Rate Securities Available For Sale Securities Available for Sale Fair Value Available For Sale Securities Amortized Cost Amortized Cost Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost Due After Five Years Through Ten Years Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value Due After Five Years Through Ten Years Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost Due After One Year Through Five Years Available For Sale Securities Debt Maturities After One Through Five Years Fair Value Due After One Year Through Five Years Available For Sale Securities Debt Maturities After Ten Years Amortized Cost Due After Ten Years Available For Sale Securities Debt Maturities After Ten Years Fair Value Due After Ten Years Available For Sale Securities Debt Maturities Amortized Cost Total Available For Sale Securities Debt Maturities Amortized Cost [Abstract] Available for Sale - Amortized Cost Available For Sale Securities Debt Maturities Fair Value [Abstract] Available for Sale - Fair Value Available For Sale Securities Debt Maturities Within One Year Amortized Cost Due in One Year or Less Available For Sale Securities Debt Maturities Within One Year Fair Value Due in One Year or Less Available For Sale Securities Debt Securities Total Available For Sale Securities Gross Realized Gain Loss Net Realized Gains (losses) on securities Availableforsale Securities Gross Unrealized Gain Gross Unrealized Gains Available For Sale Securities Gross Unrealized Losses 1 Gross Unrealized Losses Availableforsale Securities [Member] Available for Sale Investment Securities Average Interest Bearing Deposits in Federal Reserve Bank for Reserve Requirements Average Interest Bearing Deposits In Federal Reserve Bank For Reserve Requirements Average deposits maintained to meet Federal Reserve Bank reserve requirements Award Type [Axis] Award Type Business Acquisition Contingent Consideration At Fair Value Contingent Consideration Fair value of contingent consideration Carrying Reported Amount Fair Value Disclosure [Member] Carrying (Reported) Amount, Fair Value Disclosure Cash And Cash Equivalents Period Increase Decrease Increase (Decrease) in Cash and Due from Banks Cash And Due From Banks Cash and Due from Banks at End of Period Cash and Due from Banks at Beginning of Year Cash and Due from Banks Additional cash collateral deposited with derivative counterparties not offset against derivative liabilities on the consolidated balance sheet as amounts exceed the net derivative positions with the counterparties. Cash Collateral Deposited With Not Offset Against Derivative Liabilities This amount represents additional cash collateral deposited with derivative counterparties not offset against derivative liabilities Reduction in derivative assets (liabilities) due to cash collateral received from (deposited with) derivative counterparties. Cash Collateral Received And Deposited Reduction in derivatives due to cash collateral received from and deposited with derivative counterparties This amount represents additional cash collateral received from derivative counterparties not offset against derivative assets on the consolidated balance sheet as amounts exceed the net derivative positions with the counterparties. Cash Collateral Received From Not Offset Against Derivative Assets This amount represents additional cash collateral received from derivative counterparties not offset against derivative assets Cash Flow Hedge Gain (Loss) Reclassified to Compensation Expense, Net Cash Flow Hedge Gain Loss Reclassified To Compensation Expense Net Compensation Cash Flow Hedge Gain (Loss) Reclassified to Employee Benefits, Net Cash Flow Hedge Gain Loss Reclassified To Employee Benefits Net Employee Benefits Cash Flow Hedge Gain (Loss) Reclassified to Equipment and Software Expense, Net Cash Flow Hedge Gain Loss Reclassified To Equipment And Software Expense Net Equipment and Software Cash Flow Hedge Gain Loss Reclassified To Interest Expense Net Interest Expense Cash Flow Hedge Gain (Loss) Reclassified to Interest Income, Net Cash Flow Hedge Gain Loss Reclassified To Interest Income Net Interest Income Cash Flow Hedge Gain (Loss) Reclassified to Occupancy Expense, Net Cash Flow Hedge Gain Loss Reclassified To Occupancy Expense Net Occupancy Expense Cash Flow Hedge Gain Loss Reclassified To Other Expense Net Other Operating Expense Cash Flow Hedge Gain Loss Reclassified To Other Income Net Other Operating Income Cash Flow Hedge Gain Loss Reclassified To Revenue Net Net Gain/(Loss) Reclassified from AOCI to Earnings Trust, Investment and Other Servicing Fees Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months Estimated net gain (loss) to be reclassified into earnings within the next twelve months relating to cash flow hedges Cash Flow Hedging [Member] CASH FLOW HEDGES Categories Of Loan And Commitments [Axis] Categories Of Loan And Commitments [Axis] Categories Of Loan And Commitments Categories Of Loan And Commitments [Domain] Categories Of Loan And Commitments [Domain] Categories Of Loan And Commitments [Domain] Certificates Of Deposit [Member] Certificates of Deposit Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge Changes recorded in the fair value of the hedged items in a fair value hedge Class Of Financing Receivable [Member] Class of Financing Receivable Class Of Stock [Domain] Class of Stock [Domain] Client Related And Trading [Member] Client Related And Trading [Member] Client Related and Trading This represents other collection items presented on behalf of custody clients. Client Security Settlement Receivables Client Security Settlement Receivables Collateral Already Posted Aggregate Fair Value Collateral deposited with derivative counterparties for derivatives instruments with credit-risk-related contingent features that are in a liability position Collateral Requirements [Member] Collateral Requirements [Member] Collateral Requirements Collateral Securities Repledged Delivered Or Used Amount of securities repledged or sold collateral Commercial And Institutional Loans [Member] Commercial And Institutional Loans [Member] Commercial and Institutional Commercial Loan [Member] Commercial Loans Commercial Loans and Loan Commitments [Member] Commercial Loans And Loan Commitments [Member] Commercial Loans and Loan Commitments Commercial Other Financing Receivable [Member] Commercial Other Financing Receivable [Member] Other Commercial Portfolio Segment [Member] Commercial Commercial Real Estate Construction Financing Receivable [Member] Commercial Real Estate Commercial Real Estate Portfolio Segment [Member] Commercial Real Estate Portfolio Segment Commitments and Contingencies Disclosure [Line Items] Commitments And Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments Fair Value Disclosure Loan Commitments Common Stock [Member] Common Stock Common Stock Par Or Stated Value Per Share Common Stock, Par Value Common Stock Shares Authorized Common Stock, Authorized Common Stock Shares Outstanding Common Stock, Outstanding Common Stock Value Common Stock, $1.66 2/3 Par Value; Authorized 560,000,000 shares; Outstanding shares of 239,799,129 and 241,008,509 Community Reinvestment Act CRA [Member] Community Reinvestment Act [Member] Community Reinvestment Act CRA Components of Accumulated Other Comprehensive Income [Axis] Componentsof Accumulated Other Comprehensive Income [Axis] Components of Accumulated Other Comprehensive Income Components of Accumulated Other Comprehensive Income [Domain] Componentsof Accumulated Other Comprehensive Income [Domain] Components of Accumulated Other Comprehensive Income [Domain] Comprehensive Income Net Of Tax Comprehensive Income Comprehensive Income Note [Text Block] Accumulated Other Comprehensive Income (Loss) Computer Software Intangible Asset [Member] Computer Software Contingent Consideration [Member] Contingent Consideration [Member] Contingent Consideration Corporate and Institutional Service [Member] Corporate And Institutional Service [Member] Corporate and Institutional Services Corporate Debt Securities [Member] Corporate Debt Cost and Fair Value of Marketable Securities [Table Text Block] Cost And Fair Value Of Marketable Securities [Text Block] Amortized Cost to Fair Values of Securities Available for Sale Cost Method Investments Remaining Visa shares held by Northern Trust, original cost basis Covered Bonds [Member] Covered Bonds [Member] Covered Bonds Credit Default Swap [Member] Credit Default Swap Contracts Exposure to indemnifications on credit losses from securities custody activities as of balance sheet date. Credit Loss Liability Credit loss liability Net maximum amount of termination payments that could have been required for derivative instruments with credit risk-related contingent features that were in a liability position. Credit Risk Related Contingent Features Collateral Threshold Termination payments that could have been required for derivative instruments with credit-risk-related contingent features Available For Sale Debt Securities Held for Which Other-Than-Temporary-Impairment Loss Had been Recognized In the Year or Previously. Cumulative Other Than Temporary Impairment For Debt Securities [Text Block] Debt Securities Held for which Other-Than-Temporary Impairment Loss has been Recognized in Current Period or Previously Current Fiscal Year End Date Current Fiscal Year End Date Debt Disclosure [Text Block] Debt Issuance Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument Credit Rating Credit Rating Debt Instrument Face Amount Fixed rate senior notes issued Debt Instrument Interest Rate Stated Percentage Interest rate on fixed rate senior notes Cumulative earnings of certain non-US subsidiaries indefinitely reinvested Debt Instrument Issuance Discount Rate Discount on issuance of senior notes Debt Instrument Maturity Date Maturity date Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Debt Issuance Costs [Line Items] Debt Issuance Costs [Line Items] Debt Issuance Costs [Line Items] Debt Issuance Costs [Table] Debt Issuance Costs [Table] Debt Issuance Costs [Table] Debt Securities Credit Losses Rollforward Recorded in Earnings [Table Text Block] Debt Securities Credit Losses Roll Forward Recorded Earnings [Text Block] Cumulative Credit-Related Losses Recognized in Earnings on Debt Securities Other-Than-Temporarily Impaired Debt Security [Axis] Debt Security Default roll rates used to develop the expected loss on subprime and Alt-A portfolios. Default Roll Rates For Expected Loss Expected loss on subprime, Alt-A, prime and 2nd lien portfolios developed using default roll rate Deferred Compensation Plan Assets Employee Benefit and Deferred Compensation Defined Benefit Plan, Amortization [Abstract] Defined Benefit Plan Amortization [Abstract] Amortization Defined Benefit Plan Amortization Of Gains Losses Net Actuarial (Gain) Loss Defined Benefit Plan Amortization Of Prior Service Cost Credit Prior Service Cost Defined Benefit Plan Expected Return On Plan Assets Expected Return on Plan Assets Defined Benefit Plan Interest Cost Interest Cost Defined Benefit Plan Net Periodic Benefit Cost Net Periodic Benefit Expense (Benefit) Defined Benefit Plans And Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans Disclosures Defined Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans Defined Benefit Plans [Domain] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan Service Cost Service Cost Demand Deposit Accounts Demand, Noninterest-Bearing, Savings and Money Market Deposits Total Deposits Deposits [Abstract] Deposits Deposits Savings Deposits Savings and Money Market Depreciation Nonproduction Depreciation on Buildings and Equipment Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments. Derivative Asset Position Fair Value Derivatives Assets Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, excluding the effects of master netting arrangements. Derivative Assets Fair Value Assets This represents reductions in the amounts of derivative assets recorded as a result of master netting agreements in place. Derivative Assets Reduced For Master Netting Agreements Derivative assets recorded on the consolidated balance sheet, reduced as a result of master netting agreements Derivative By Nature [Axis] Derivative, by Nature Derivative Contract Type [Domain] Derivative Contract Type [Domain] Derivative Fair Value Of Derivative Asset Fair Value Asset Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral Reduction in derivative assets due to cash collateral received from derivative counterparties Derivative Fair Value Of Derivative Liability Fair Value Liability Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral Reduction in derivative liabilities due to cash collateral deposited with derivative counterparties Derivative Financial Instruments Assets [Member] Derivative Financial Instruments, Assets Derivative Financial Instruments Liabilities Fair Value Disclosure Derivatives Liabilities Derivative Financial Instruments Liabilities [Member] Derivative Financial Instruments, Liabilities Derivative Instrument Detail [Abstract] Derivative Instruments Derivative Instrument Risk [Axis] Derivative Instrument Risk Derivative Instruments And Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Derivative Instruments Gain Loss By Hedging Relationship [Axis] Hedging Relationship Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments Gain Loss [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments Gain Loss Reclassified From Accumulated O C I Into Income Effective Portion Net Total Derivative Instruments Gain Loss Recognized In Income Net Amount of Derivative Gain/(Loss) Recognized in Income Amount Recognized in Income Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net Hedging Instrument Gain/(Loss) Recognized in AOCI (Before Tax) Net Gain/(Loss) Recognized in AOCI Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, excluding the effects of master netting arrangements. Derivative Liabilities Fair Value Liabilities This represents reductions in the amounts of derivative liabilities recorded as a result of master netting agreements in place. Derivative Liabilities Reduced For Master Netting Agreements Derivative liabilities recorded on the consolidated balance sheet, reduced as a result of master netting agreements Derivative [Line Items] Derivative [Line Items] Derivative Name [Domain] Derivative, Name [Domain] Derivative Net Liability Position Aggregate Fair Value Aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a liability position Derivative Notional Amount Notional Value Derivatives, by Derivative Instrument Contract [Axis] Derivatives By Derivative Instrument Contract [Axis] Derivatives, by Derivative Instrument Contract Derivatives, by Derivative Instrument Contract [Domain] Derivatives By Derivative Instrument Contract [Domain] Derivatives, by Derivative Instrument Contract [Domain] Derivative [Table] Derivative [Table] Description Of New Accounting Pronouncements Not Yet Adopted Recent Accounting Pronouncements Disclosure - Accumulated Other Comprehensive Income (Loss) Changes During Period [Abstract] Disclosure Accumulated Other Comprehensive Income Loss Changes During Period [Abstract] Disclosure - Accumulated Other Comprehensive Income (Loss) Changes During Period [Abstract] Disclosure - Allowances for Credit Losses and Recorded Investments in Loans and Leases by Segment [Abstract] Disclosure Allowances For Credit Losses And Recorded Investments In Loans And Leases By Segment [Abstract] Disclosure - Allowances for Credit Losses and Recorded Investments in Loans and Leases by Segment [Abstract] Disclosure - Amortized Cost to Fair Values of Securities Available for Sale [Abstract] Disclosure Amortized Cost To Fair Values Of Securities Available For Sale [Abstract] Disclosure - Amortized Cost to Fair Values of Securities Available for Sale [Abstract] Disclosure - Amortized Cost to Fair Values of Securities Held to Maturity [Abstract] Disclosure Amortized Cost To Fair Values Of Securities Held To Maturity [Abstract] Disclosure - Amortized Cost to Fair Values of Securities Held to Maturity [Abstract] Disclosure - Amounts Outstanding for Loans and Leases by Segment and Class [Abstract] Disclosure Amounts Outstanding For Loans And Leases By Segment And Class [Abstract] Disclosure - Amounts Outstanding for Loans and Leases by Segment and Class [Abstract] Disclosure - Assets and Liabilities Measured at Fair Value on Recurring Basis Segregated by Fair Value Hierarchy Level [Abstract] Disclosure Assets And Liabilities Measured At Fair Value On Recurring Basis Segregated By Fair Value Hierarchy Level [Abstract] Disclosure - Assets and Liabilities Measured at Fair Value on Recurring Basis Segregated by Fair Value Hierarchy Level [Abstract] Disclosure - Assets Measured at Fair Value on Nonrecurring Basis [Abstract] Disclosure Assets Measured At Fair Value On Nonrecurring Basis [Abstract] Disclosure - Assets Measured at Fair Value on Nonrecurring Basis [Abstract] Disclosure - Balances and Delinquency Status of Performing and Nonperforming Loans and Leases by Segment and Class as well as Total Other Real Estate Owned and Nonperforming Asset Balances [Abstract] Disclosure Balances And Delinquency Status Of Performing And Nonperforming Loans And Leases By Segment And Class As Well As Total Other Real Estate Owned And Nonperforming Asset Balances [Abstract] Disclosure - Balances and Delinquency Status of Performing and Nonperforming Loans and Leases by Segment and Class as well as Total Other Real Estate Owned and Nonperforming Asset Balances [Abstract] Disclosure - Book and Fair Values of Financial Instruments [Abstract] Disclosure Book And Fair Values Of Financial Instruments [Abstract] Disclosure - Book and Fair Values of Financial Instruments [Abstract] Disclosure - Book Values, Ultimate Default Rates, and Loss Severity Rates for Non-Agency Residential Mortgage-Backed Securities Portfolio, by Security Type [Abstract] Disclosure Book Values Ultimate Default Rates And Loss Severity Rates For Non Agency Residential Mortgage Backed Securities Portfolio By Security Type [Abstract] Disclosure - Book Values, Ultimate Default Rates, and Loss Severity Rates for Non-Agency Residential Mortgage-Backed Securities Portfolio, by Security Type [Abstract] Disclosure - Carrying Amounts of Goodwill [Abstract] Disclosure Carrying Amounts Of Goodwill [Abstract] Disclosure - Carrying Amounts of Goodwill [Abstract] Disclosure - Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings [Abstract] Disclosure Cash Flow Hedge Derivative Gains And Losses Recognized In A O C I And The Amounts Reclassified To Earnings [Abstract] Disclosure - Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings [Abstract] Disclosure - Changes in Allowance for Credit Losses by Segment [Abstract] Disclosure Changes In Allowance For Credit Losses By Segment [Abstract] Disclosure - Changes in Allowance for Credit Losses by Segment [Abstract] Disclosure - Changes in Level 3 Assets [Abstract] Disclosure Changes In Level 3 Assets [Abstract] Disclosure - Changes in Level 3 Assets [Abstract]