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 - Fair Value Hierarchy 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 - Business Units link:calculationLink link:presentationLink link:definitionLink 119 - Disclosure - Accumulated Other Comprehensive Income (Loss) link:calculationLink link:presentationLink link:definitionLink 120 - Disclosure - Net Income Per Common Share Computations link:calculationLink link:presentationLink link:definitionLink 121 - Disclosure - Net Interest Income link:calculationLink link:presentationLink link:definitionLink 122 - Disclosure - Visa Membership link:calculationLink link:presentationLink link:definitionLink 123 - Disclosure - Income Taxes link:calculationLink link:presentationLink link:definitionLink 124 - Disclosure - Pension and Other Postretirement Plans 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 - Debt Issuance link:calculationLink link:presentationLink link:definitionLink 130 - Disclosure - Fair Value Measurements - Fair Value Hierarchy (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 - Business Units (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 Other Postretirement Plans (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 - Assets and Liabilities Measured at Fair Value on a Recurring Basis Segregated by Fair Value Hierarchy Level (Detail) link:calculationLink link:presentationLink link:definitionLink 143 - Disclosure - Assets and Liabilities Measured at Fair Value on a Recurring Basis Segregated by Fair Value Hierarchy Level (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 144 - Disclosure - Changes in Level 3 Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 145 - Disclosure - Fair Value Measurements - Fair Value Hierarchy - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 146 - Disclosure - Changes in Level 3 Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 147 - Disclosure - Assets Measured at Fair Value on a Nonrecurring Basis (Detail) link:calculationLink link:presentationLink link:definitionLink 148 - Disclosure - Assets Measured at Fair Value on a Nonrecurring Basis (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 149 - Disclosure - Book and Fair Values of Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 150 - Disclosure - Amortized Cost and Fair Values of Securities (Detail) link:calculationLink link:presentationLink link:definitionLink 151 - Disclosure - Maturity of Securities (Detail) link:calculationLink link:presentationLink link:definitionLink 152 - Disclosure - Securities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 153 - Disclosure - Securities Continuous Unrealized Loss Position (Detail) link:calculationLink link:presentationLink link:definitionLink 154 - Disclosure - Book Values, Ultimate Default Rates, and Loss Severity Rates for the Non-Agency Residential Mortgage-Backed Securities Portfolio, by Security Type (Detail) link:calculationLink link:presentationLink link:definitionLink 155 - Disclosure - Credit Losses on Debt Securities (Detail) link:calculationLink link:presentationLink link:definitionLink 156 - Disclosure - Credit-Related Losses Recognized in Earnings on Debt Securities Other-than-temporarily Impaired (Detail) link:calculationLink link:presentationLink link:definitionLink 157 - Disclosure - Debt Securities Held for which an Other-Than-Temporary Impairment Loss has been Recognized in the Current Period or Previously (Detail) link:calculationLink link:presentationLink link:definitionLink 158 - Disclosure - Amounts Outstanding in Selected Loan Categories (Detail) link:calculationLink link:presentationLink link:definitionLink 159 - Disclosure - Loans and Leases - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 160 - Disclosure - Credit Quality Indicators (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 Other Real Estate Owned and Nonperforming Asset (Detail) link:calculationLink link:presentationLink link:definitionLink 162 - Disclosure - Impaired Loans by Segments and Class (Detail) link:calculationLink link:presentationLink link:definitionLink 163 - Disclosure - Average Recorded Investment in Impaired Loans and Interest Income that would have been Recorded on Nonperforming Loans (Detail) link:calculationLink link:presentationLink link:definitionLink 164 - Disclosure - Number of Loans and Leases Modified in Troubled Debt Restructurings During the Previous 12 months which Became Nonperforming as well as the Recorded Investment and Unpaid Principal Balance of Those TDRs (Detail) link:calculationLink link:presentationLink link:definitionLink 165 - Disclosure - Number of Loans and Leases Modified in Troubled Debt Restructurings during the previous 12 Months which became Disclosure - Nonperforming, as well as the Recorded Investment and Unpaid Principal Balance (Detail) link:calculationLink link:presentationLink link:definitionLink 166 - Disclosure - Changes in the Allowance for Credit Losses by Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 167 - Disclosure - Reserve for Credit Losses and Recorded Investments in Loans and Leases by Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 168 - Disclosure - Pledged Assets - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 169 - Disclosure - Changes in Carrying Amounts of Goodwill by Business Unit (Detail) link:calculationLink link:presentationLink link:definitionLink 170 - Disclosure - Other Intangible Assets Subject to Amortization (Detail) link:calculationLink link:presentationLink link:definitionLink 171 - Disclosure - Goodwill and Other Intangibles - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 172 - Disclosure - Earnings Contribution of Northern Trust's Business Units (Detail) link:calculationLink link:presentationLink link:definitionLink 173 - Disclosure - Earnings Contribution of Northern Trust's Business Units (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 174 - Disclosure - Components of Accumulated Other Comprehensive Income (Loss) (Detail) link:calculationLink link:presentationLink link:definitionLink 175 - Disclosure - Computations of Net Income (Loss) Per Common Share (Detail) link:calculationLink link:presentationLink link:definitionLink 176 - Disclosure - Net Income Per Common Share Computations - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 177 - Disclosure - Components of Net Interest Income (Detail) link:calculationLink link:presentationLink link:definitionLink 178 - Disclosure - Visa Membership - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 179 - Disclosure - Income Taxes - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 180 - Disclosure - Net Periodic Pension Expense of Northern Trust's U.S. and Non-U.S. Pension Plans, Supplemental Pension Plan, and Other Postretirement Plan (Detail) link:calculationLink link:presentationLink link:definitionLink 181 - Disclosure - Compensation Expense for Share-Based Payment Arrangements and the Associated Tax Impacts (Detail) link:calculationLink link:presentationLink link:definitionLink 182 - Disclosure - Variable Interest Entities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 183 - Disclosure - Contingent Liabilities - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 184 - Disclosure - Derivative Financial Instruments - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 185 - Disclosure - Notional and Fair Value Amounts of Client-related and Trading Derivative Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 186 - Disclosure - Gains and Losses Recorded in the Consolidated Statement of Income related to Client Related and Trading Derivative Financial Instruments (Detail) link:calculationLink link:presentationLink link:definitionLink 187 - Disclosure - Types and Classifications of Derivative Instruments Designated as Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 188 - Disclosure - Gains and Losses Recorded in the Consolidated Statement of Income related to Fair Value Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 189 - Disclosure - Cash Flow Hedge Derivative Gains and Losses Recognized in AOCI and the Amounts Reclassified to Earnings (Detail) link:calculationLink link:presentationLink link:definitionLink 190 - Disclosure - Net Investment Hedge Gains and Losses Recognized in AOCI (Detail) link:calculationLink link:presentationLink link:definitionLink 191 - Disclosure - Types and Classifications of Risk Management Derivative Instruments Not Formally Designated as Hedges, Including Notional and Fair Values (Detail) link:calculationLink link:presentationLink link:definitionLink 192 - Disclosure - Gains and Losses Recorded in the Consolidated Statement of Income related to Derivative Instruments Not Formally Designated as Hedges (Detail) link:calculationLink link:presentationLink link:definitionLink 193 - Disclosure - Debt Issuance - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink