0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Changes in Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Changes in Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Earnings Per Common Share link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Loan Portfolio link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Asset Quality link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Securities link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Derivatives and Hedging Activities link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Mortgage Servicing Assets link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Premises and Equipment link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Goodwill and Other Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Variable Interest Entities link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Discontinued Operations link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Employee Benefits link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Time Deposits link:presentationLink link:calculationLink link:definitionLink 9952177 - 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Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Earnings Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Loan Portfolio (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Asset Quality (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Securities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Derivatives and Hedging Activities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Mortgage Servicing Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Premises and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Goodwill and Other Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Variable Interest Entities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Employee Benefits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Borrowings (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Time Deposits (Tables) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Commitments, Contingent Liabilities, and Guarantees (Tables) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Accumulated Other Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Shareholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Regulatory Matters (Tables) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Business Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Condensed Financial Information of the Parent Company (Tables) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Revenue from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Earnings Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Loan Portfolio (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Asset Quality - Changes in Allowance for Loan and Lease Losses by Loan Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Asset Quality - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Asset Quality - Schedule of Commercial Credit Exposure (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Asset Quality - Schedule of Consumer Credit Exposure (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Asset Quality - Aging Analysis of Past Due and Current Loans (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Asset Quality - Schedule of Modifications for Borrowers Experiencing Financial Difficulty (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Asset Quality - Schedule of Financial Effects of Modifications to Borrowers Experiencing Financial Difficulty (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Asset Quality - Schedule of Amortized Cost Basis of Modified Loans That Subsequently Defaulted (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Asset Quality - Schedule of Performance of Loans That Have Been Modified in the Last 12 Months (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Asset Quality - Changes in Liability for Credit Losses on Lending Related Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Fair Value Measurements - Schedule of Qualitative Disclosures of Valuation Techniques (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Fair Value Measurements - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Fair Value Measurements - Fair Value Disclosures of Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Securities - Details of Securities (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Securities - Schedule of Available for Sale Securities in an Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Securities - Schedule of Available for Sale Securities in an Unrealized Loss Position (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Securities - Schedule of Realized Gain (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Securities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Securities - Securities by Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Derivatives and Hedging Activities - Fair Values, Volume of Activity and Gain (Loss) Information Related to Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Derivatives and Hedging Activities - Cumulative Basis Adjustments on Fair Value Hedges (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Derivatives and Hedging Activities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Derivatives and Hedging Activities - Effect of Fair Value and Cash Flow Hedges on Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Derivatives and Hedging Activities - Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Derivatives and Hedging Activities - Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Derivatives and Hedging Activities - Fair Value of Derivative Assets by Type (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Derivatives and Hedging Activities - Credit Derivatives Sold and Held (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Derivatives and Hedging Activities - Schedule of Credit Risk Contingent Feature (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Mortgage Servicing Assets - Changes in Carrying Amount of Mortgage Servicing Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Mortgage Servicing Assets - Schedule of Range and Weighted-Average of Significant Unobservable Inputs (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Mortgage Servicing Assets - Assumptions and Sensitivity of MSR’s (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Mortgage Servicing Assets - OSMR (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - Mortgage Servicing Assets - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - Mortgage Servicing Assets - MSR's (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - Leases - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955576 - Disclosure - Leases - Components of Lease Expense and Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955577 - Disclosure - Leases - Schedule of Additional Balance Sheet Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955578 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955579 - Disclosure - Leases - Components of Equipment Leasing Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955580 - Disclosure - Leases - Composition of Net Investment in Sales-Type and Direct Financing Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955581 - Disclosure - Leases - Minimum Future Lease Payments to be Received for Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955582 - Disclosure - Premises and Equipment - Schedule of Premises and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955583 - Disclosure - Premises and Equipment - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955584 - Disclosure - Goodwill and Other Intangible Assets - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955585 - Disclosure - Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9955586 - Disclosure - Goodwill and Other Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955587 - Disclosure - Goodwill and Other Intangible Assets - Future Amortization Expense of Finite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955588 - Disclosure - Variable Interest Entities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955589 - Disclosure - Variable Interest Entities - Variable Interest Entities Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955590 - Disclosure - Income Taxes - Income Taxes Included in Income Statement (Details) link:presentationLink link:calculationLink link:definitionLink 9955591 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955592 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955593 - Disclosure - Income Taxes - Total Income Tax Expense (Benefit) and Resulting Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 9955594 - Disclosure - Income Taxes - Schedule of Income Taxes Paid, Net of Refunds (Details) link:presentationLink link:calculationLink link:definitionLink 9955595 - Disclosure - Income Taxes - Change in Liability for Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955596 - Disclosure - Discontinued Operations (Details) link:presentationLink link:calculationLink link:definitionLink 9955597 - Disclosure - Stock-Based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955598 - Disclosure - Stock-Based Compensation - Activity and Pricing Information for Nonvested Shares in Long-Term Incentive Compensation Program (Details) link:presentationLink link:calculationLink link:definitionLink 9955599 - Disclosure - Stock-Based Compensation - Assumptions Used in Options Pricing Model (Details) link:presentationLink link:calculationLink link:definitionLink 9955600 - Disclosure - Stock-Based Compensation - Activity, Pricing and Other Information for Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955601 - Disclosure - Stock-Based Compensation - Activity and Pricing Information for Nonvested Shares Granted Under Deferred Compensation Plans and Other Restricted Stock Awards (Details) link:presentationLink link:calculationLink link:definitionLink 9955602 - Disclosure - Employee Benefits - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955603 - Disclosure - Employee Benefits - Net Pension Cost and Amount Recognized in OCI for All Funded and Unfunded Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9955604 - Disclosure - Employee Benefits - Changes in PBO and Changes in FVA (Details) link:presentationLink link:calculationLink link:definitionLink 9955605 - Disclosure - Employee Benefits - Funded Status of Pension Plans Recognized in Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9955606 - Disclosure - Employee Benefits - Funded and Unfunded Pension Plans and Postretirement Benefit Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955607 - Disclosure - Employee Benefits - Plans ABO in Excess of Plan Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955608 - Disclosure - Employee Benefits - Weighted-Average Rates to Determine Actuarial Present Value of Benefit Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955609 - Disclosure - Employee Benefits - Weighted-Average Rates to Determine Net Pension Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955610 - Disclosure - Employee Benefits - Asset Target Allocations Prescribed by Pension Funds' Investment Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955611 - Disclosure - Employee Benefits - Fair Values of Pension Plan Assets by Asset Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955612 - Disclosure - Employee Benefits - Asset Target Allocations Prescribed by Trusts' Investment Policies (Details) link:presentationLink link:calculationLink link:definitionLink 9955613 - Disclosure - Employee Benefits - Fair Values of Postretirement Plan Assets by Asset Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955614 - Disclosure - Borrowings - Components of Short-Term Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 9955615 - Disclosure - Borrowings - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955616 - Disclosure - Borrowings - Schedule of Components of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955617 - Disclosure - Borrowings - Schedule of Scheduled Principal Payments on Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955618 - 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Disclosure - Shareholders' Equity - Schedule of Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955626 - Disclosure - Regulatory Matters - Key's and KeyBank's Actual Capital Amounts and Ratios, Minimum Capital Amounts and Ratios (Details) link:presentationLink link:calculationLink link:definitionLink 9955627 - Disclosure - Regulatory Matters - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955628 - Disclosure - Business Segment Reporting - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955629 - Disclosure - Business Segment Reporting - Financial Information of Business Groups (Details) link:presentationLink link:calculationLink link:definitionLink 9955630 - Disclosure - Condensed Financial Information of the Parent Company - Condensed Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 9955631 - Disclosure - Condensed Financial Information of the Parent Company - 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