101 - Document - Document and Entity Information link:calculationLink link:presentationLink link:definitionLink 103 - Statement - Consolidated Balance Sheet link:calculationLink link:presentationLink link:definitionLink 104 - Statement - Consolidated Balance Sheet (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 105 - Statement - Consolidated Statement of Income link:calculationLink link:presentationLink link:definitionLink 106 - Statement - Consolidated Statement of Comprehensive Income link:calculationLink link:presentationLink link:definitionLink 107 - Statement - Consolidated Statement of Income (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 108 - Statement - Consolidated Statement of Changes in Stockholders' Equity link:calculationLink link:presentationLink link:definitionLink 109 - Statement - Consolidated Statement of Cash Flows link:calculationLink link:presentationLink link:definitionLink 110 - Disclosure - Basis of Presentation link:calculationLink link:presentationLink link:definitionLink 111 - Disclosure - Recent Accounting Pronouncements link:calculationLink link:presentationLink link:definitionLink 112 - Disclosure - Fair Value Measurements link:calculationLink link:presentationLink link:definitionLink 113 - Disclosure - Securities link:calculationLink link:presentationLink link:definitionLink 114 - Disclosure - Loans and Leases link:calculationLink link:presentationLink link:definitionLink 115 - Disclosure - Allowance for Credit Losses link:calculationLink link:presentationLink link:definitionLink 116 - Disclosure - Pledged Assets link:calculationLink link:presentationLink link:definitionLink 117 - Disclosure - Goodwill and Other Intangibles link:calculationLink link:presentationLink link:definitionLink 118 - Disclosure - Reporting Segments link:calculationLink link:presentationLink link:definitionLink 119 - Disclosure - Stockholders' Equity link:calculationLink link:presentationLink link:definitionLink 120 - Disclosure - Accumulated Other Comprehensive Income (Loss) link:calculationLink link:presentationLink link:definitionLink 121 - Disclosure - Net Income Per Common Share Computations link:calculationLink link:presentationLink link:definitionLink 122 - Disclosure - Net Interest Income link:calculationLink link:presentationLink link:definitionLink 123 - Disclosure - Income Taxes link:calculationLink link:presentationLink link:definitionLink 124 - Disclosure - Pension and Postretirement Health Care link:calculationLink link:presentationLink link:definitionLink 125 - Disclosure - Share-Based Compensation Plans link:calculationLink link:presentationLink link:definitionLink 126 - Disclosure - Variable Interest Entities link:calculationLink link:presentationLink link:definitionLink 127 - Disclosure - Contingent Liabilities link:calculationLink link:presentationLink link:definitionLink 128 - Disclosure - Derivative Financial Instruments link:calculationLink link:presentationLink link:definitionLink 129 - Disclosure - Offsetting of Assets and Liabilities link:calculationLink link:presentationLink link:definitionLink 130 - Disclosure - Fair Value Measurements (Tables) link:calculationLink link:presentationLink link:definitionLink 131 - Disclosure - Securities (Tables) link:calculationLink link:presentationLink link:definitionLink 132 - Disclosure - Loans and Leases (Tables) link:calculationLink link:presentationLink link:definitionLink 133 - Disclosure - Allowance for Credit Losses (Tables) link:calculationLink link:presentationLink link:definitionLink 134 - Disclosure - Goodwill and Other Intangibles (Tables) link:calculationLink link:presentationLink link:definitionLink 135 - Disclosure - Reporting Segments (Tables) link:calculationLink link:presentationLink link:definitionLink 136 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) link:calculationLink link:presentationLink link:definitionLink 137 - Disclosure - Net Income Per Common Share Computations (Tables) link:calculationLink link:presentationLink link:definitionLink 138 - Disclosure - Net Interest Income (Tables) link:calculationLink link:presentationLink link:definitionLink 139 - Disclosure - Pension and Postretirement Health Care (Tables) link:calculationLink link:presentationLink link:definitionLink 140 - Disclosure - Share-Based Compensation Plans (Tables) link:calculationLink link:presentationLink link:definitionLink 141 - Disclosure - Derivative Financial Instruments (Tables) link:calculationLink link:presentationLink link:definitionLink 142 - Disclosure - Offsetting of Assets and Liabilities (Tables) link:calculationLink link:presentationLink link:definitionLink 143 - Disclosure - Fair Value Measurements - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 144 - Disclosure - Valuation Techniques, Significant Unobservable Inputs, and Quantitative Information (Detail) link:calculationLink link:presentationLink link:definitionLink 145 - Disclosure - Assets and Liabilities Measured at Fair Value on Recurring Basis Segregated by Fair Value Hierarchy Level (Detail) link:calculationLink link:presentationLink link:definitionLink 146 - Disclosure - Assets and Liabilities Measured at Fair Value on Recurring Basis Segregated by Fair Value Hierarchy Level (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 147 - Disclosure - Changes in Level 3 Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 148 - Disclosure - Changes in Level 3 Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 149 - Disclosure - Valuation Techniques, Significant Unobservable Inputs, Quantitative Information Non-recurring Basis (Detail) link:calculationLink link:presentationLink link:definitionLink 150 - Disclosure - Book and Fair Values of All Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 151 - Disclosure - Reconciliation of Amortized Cost to Fair Value of Securities Available for Sale (Detail) link:calculationLink link:presentationLink link:definitionLink 152 - Disclosure - Reconciliation of Amortized Cost to Fair Values of Securities Held to Maturity (Detail) link:calculationLink link:presentationLink link:definitionLink 153 - Disclosure - Remaining Maturity of Securities Available for Sale and Held to Maturity (Detail) link:calculationLink link:presentationLink link:definitionLink 154 - Disclosure - Securities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 155 - Disclosure - Securities Continuous Unrealized Loss Position (Detail) link:calculationLink link:presentationLink link:definitionLink 156 - Disclosure - Credit Related Impairment Losses Recognized in Earnings on Other Than Temporarily Impaired Securities (Detail) link:calculationLink link:presentationLink link:definitionLink 157 - Disclosure - Credit-Related Losses Recognized in Earnings on Debt Securities Other-Than-Temporarily Impaired (Detail) link:calculationLink link:presentationLink link:definitionLink 158 - Disclosure - Amounts Outstanding for Loans and Leases by Segment and Class (Detail) link:calculationLink link:presentationLink link:definitionLink 159 - Disclosure - Loans and Leases - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 160 - Disclosure - Loan and Lease Segment and Class Balances Segregated by Borrower Ratings into "One to Three", "Four to Five" and "Six to Nine" (Watch List) Categories (Detail) link:calculationLink link:presentationLink link:definitionLink 161 - Disclosure - Balances and Delinquency Status of Performing and Nonperforming Loans and Leases by Segment and Class as well as Total OREO and Nonperforming Asset Balances (Detail) link:calculationLink link:presentationLink link:definitionLink 162 - Disclosure - Impaired Loans by Segment and Class (Detail) link:calculationLink link:presentationLink link:definitionLink 163 - Disclosure - Number of Loans and Leases Modified in TDRs and Total Recorded Investments and Unpaid Principal Balances (Detail) link:calculationLink link:presentationLink link:definitionLink 164 - Disclosure - Changes in Allowance for Credit Losses by Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 165 - Disclosure - Allowances for Credit Losses and Recorded Investments in Loans and Leases by Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 166 - Disclosure - Pledged Assets - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 167 - Disclosure - Changes by Reporting Segment in Carrying Amounts of Goodwill, including Effect of Foreign Exchange Rates on Non-U.S.-Dollar-Denominated Balances (Detail) link:calculationLink link:presentationLink link:definitionLink 168 - Disclosure - Other Intangible Assets Subject to Amortization (Detail) link:calculationLink link:presentationLink link:definitionLink 169 - Disclosure - Goodwill and Other Intangibles - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 170 - Disclosure - Earnings Contribution of Northern Trust's Reporting Segments (Detail) link:calculationLink link:presentationLink link:definitionLink 171 - Disclosure - Earnings Contribution of Northern Trust's Reporting Segments (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 172 - Disclosure - Stockholders' Equity - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 173 - Disclosure - Components of Accumulated Other Comprehensive Income (Loss) (AOCI) (Detail) link:calculationLink link:presentationLink link:definitionLink 174 - Disclosure - Accumulated Other Comprehensive Income (Loss) Changes During Period (Detail) link:calculationLink link:presentationLink link:definitionLink 175 - Disclosure - Reclassification Adjustments out of Accumulated Other Comprehensive Income (Loss) (Detail) link:calculationLink link:presentationLink link:definitionLink 176 - Disclosure - Computations of Net Income Per Common Share (Detail) link:calculationLink link:presentationLink link:definitionLink 177 - Disclosure - Computations of Net Income Per Common Share (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 178 - Disclosure - Components of Net Interest Income (Detail) link:calculationLink link:presentationLink link:definitionLink 179 - Disclosure - Components of Net Interest Income (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 180 - Disclosure - Income Taxes - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 181 - Disclosure - Components of Company's Net Periodic Benefit Cost (Detail) link:calculationLink link:presentationLink link:definitionLink 182 - Disclosure - Share-Based Compensation Plans - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 183 - Disclosure - Compensation Expense for Share-Based Payment Arrangements and Associated Tax Impacts (Detail) link:calculationLink link:presentationLink link:definitionLink 184 - Disclosure - Variable Interest Entities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 185 - Disclosure - Contingent Liabilities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 186 - Disclosure - Derivative Financial Instruments - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 187 - Disclosure - Notional and Fair Value Amounts of Client-related and Trading Derivative Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 188 - Disclosure - Gains and Losses Recorded in Consolidated Statements of Income Related to Client Related and Trading Derivative Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 189 - Disclosure - Types and Classifications of Derivative Instruments Designated as Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 190 - Disclosure - Gains and Losses Recorded in Consolidated Statements of Income Related to Fair Value Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 191 - Disclosure - Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings (Detail) link:calculationLink link:presentationLink link:definitionLink 192 - Disclosure - Net Investment Hedge Gains and Losses Recognized in AOCI (Detail) link:calculationLink link:presentationLink link:definitionLink 193 - Disclosure - Types of Risk Management Derivative Instruments Not Formally Designated as Hedges and Their Notional Amounts and Fair Values (Detail) link:calculationLink link:presentationLink link:definitionLink 194 - Disclosure - Gains and Losses Recorded in Consolidated Statements of Income related to Derivative Instruments Not Formally Designated as Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 195 - Disclosure - Offsetting of Derivative Assets and of Securities Purchased Under Agreements to Resell Within Consolidated Balance Sheets (Detail) link:calculationLink link:presentationLink link:definitionLink 196 - Disclosure - Offsetting of Derivative Assets and of Securities Purchased Under Agreements to Resell Within Consolidated Balance Sheets (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 197 - Disclosure - Offsetting of Derivative Liabilities and of Securities Sold Under Agreements to Repurchase Within Consolidated Balance Sheet (Detail) link:calculationLink link:presentationLink link:definitionLink 198 - Disclosure - Offsetting of Derivative Liabilities and of Securities Sold Under Agreements to Repurchase Within Consolidated Balance Sheet (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink