Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011		Mar. 31, 2011
ASSETS
Cash and due from banks	$ 416		$ 694		$ 540
Short-term investments	3,605		3,519		3,705
Trading account assets	614		623		1,041
Securities available for sale	14,633		16,012		19,448
Held-to-maturity securities (fair value: $3,052, $2,133 and $19)	3,019		2,109		19
Other investments	1,188		1,163		1,402
Loans, net of unearned income of $1,282, $1,388 and $1,498	49,226		49,575		48,552
Less: Allowance for loan and lease losses	944		1,004		1,372
Net loans	48,282		48,571		47,180
Loans held for sale	511		728		426
Premises and equipment	937		944		906
Operating lease assets	335		350		491
Goodwill	917		917		917
Other intangible assets	15		17		20
Corporate-owned life insurance	3,270		3,256		3,187
Derivative assets	830		945		1,005
Accrued income and other assets (including $87 of consolidated LIHTC guaranteed funds VIEs, see Note 9)(a)	3,091	[1]	3,077	[1]	3,758	[1]
Discontinued assets (including $2,747 of consolidated education loan securitization trust VIEs (see Note 9) and $74of loans in portfolio at fair value)(a)	5,768	[1]	5,860	[1]	6,393	[1]
Total assets	87,431		88,785		90,438
Deposits in domestic offices:
NOW and money market deposit accounts	29,124		27,954		26,177
Savings deposits	2,075		1,962		1,964
Certificates of deposit ($100,000 or more)	3,984		4,111		5,314
Other time deposits	5,848		6,243		7,597
Total interest-bearing	41,031		40,270		41,052
Noninterest-bearing	19,606		21,098		16,495
Deposits in foreign office - interest-bearing	857		588		3,263
Total deposits	61,494		61,956		60,810
Federal funds purchased and securities sold under repurchase agreements	1,846		1,711		2,232
Bank notes and other short-term borrowings	324		337		685
Derivative liabilities	754		1,026		1,106
Accrued expense and other liabilities	1,450		1,763		1,931
Long-term debt	8,898		9,520		11,048
Discontinued liabilities (including $2,542 of consolidated education loan securitization trust VIEs at fair value, see Note 9)(a)	2,549	[1]	2,550	[1]	2,929	[1]
Total liabilities	77,315		78,863		80,741
Preferred stock, $1 par value, authorized 25,000,000 shares:
Common shares, $1 par value; authorized 1,400,000,000 shares; issued 1,016,969,905, 1,016,969,905 and 1,016,969,905 shares	1,017		1,017		1,017
Common stock warrant					87
Capital surplus	4,116		4,194		4,167
Retained earnings	6,411		6,246		5,721
Treasury stock, at cost (60,868,267, 63,962,113 and 63,043,642)	(1,717)		(1,815)		(1,823)
Accumulated other comprehensive income (loss)	(19)		(28)		(35)
Key shareholders' equity	10,099		9,905		9,425
Noncontrolling interests	17		17		272
Total equity	10,116		9,922		9,697
Total liabilities and equity	87,431		88,785		90,438
Preferred Stock
Preferred stock, $1 par value, authorized 25,000,000 shares:
Total equity	291		291		291
Series A Preferred Stock
Preferred stock, $1 par value, authorized 25,000,000 shares:
Preferred stock	$ 291		$ 291		$ 291

[1] The assets of the VIEs can only be used by the particular VIE and there is no recourse to Key with respect to the liabilities of the consolidated LIHTC or education loan securitization trust VIEs.