Shareholders' Equity	3 Months Ended
Mar. 31, 2012
Shareholders' Equity [Abstract]
Shareholders' Equity	15. Shareholders’ Equity Comprehensive Capital Plan On January 9, 2012, we submitted to the Federal Reserve and provided to the OCC under the annual CCAR process our 2012-2013 Comprehensive Capital Plan. At its March 2012 meeting, our Board authorized the purchase in the open market or through privately negotiated transactions of up to $312 million of our Common Shares. This authorization was expressly in addition to any amounts remaining under preexisting authority. Pursuant to our 2012 capital plan submitted to the Federal Reserve as part of CCAR and not objected to by the Federal Reserve, KeyCorp has authority to purchase up to $344 million of our Common Shares, including $312 million for general repurchase and up to $32 million for repurchase in connection with employee elections under our compensation and benefit programs. Our existing repurchase program does not have an expiration date. Common Share repurchases under the current authorization commenced in April 2012 and are expected to be executed on through the first quarter of 2013. Repurchase of TARP CPP Preferred Stock, Warrant and Completion of Equity and Debt Offerings During the first half of 2011, we completed the repurchase of the $2.5 billion of Series B Preferred Stock and corresponding warrant issued to the U.S. Treasury Department. As a result of the repurchase, we recorded a $49 million one-time deemed dividend in the first quarter of 2011 related to the remaining difference between the repurchase price and the carrying value of the preferred shares at the time of repurchase. On April 20, 2011 we repurchased the warrant directly from the U.S. Treasury for $70 million. Beginning with the second quarter of 2011, the repurchase resulted in the elimination of quarterly dividends of $31 million and discount amortization of $4 million, or $140 million on an annual basis, related to these preferred shares. In total, we paid $2.867 billion to the U.S. Treasury during the investment period in the form of dividends, principal and repurchase of the warrant, resulting in a return to the U.S. Treasury of $367 million above the initial investment of $2.5 billion on November 14, 2008.

- Definition

Disclosures related to accounts comprising shareholders' equity, including other comprehensive income. Includes: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables; effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

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