Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
ASSETS
Cash and due from banks	$ 974		$ 694		$ 828
Short-term investments	2,208		3,519		4,766
Trading account assets	663		623		729
Securities available for sale	11,962		16,012		17,612
Held-to-maturity securities (fair value: $4,212, $2,133 and $1,186)	4,153		2,109		1,176
Other investments	1,106		1,163		1,210
Loans, net of unearned income of $980, $1,388 and $1,413	51,419		49,575		48,195
Less: Allowance for loan and lease losses	888		1,004		1,131
Net loans	50,531		48,571		47,064
Loans held for sale	628		728		479
Premises and equipment	942		944		924
Operating lease assets	290		350		393
Goodwill	979		917		917
Other intangible assets	182		17		18
Corporate-owned life insurance	3,309		3,256		3,227
Derivative assets	771		945		940
Accrued income and other assets (including $59 of consolidated LIHTC guaranteed funds VIEs, see Note 9)	2,871	[1]	3,077	[1]	2,946	[1]
Discontinued assets (including $2,542 of consolidated education loan securitization trust VIEs (see Note 9) and $71 of loans in portfolio at fair value)	5,381	[1]	5,860	[1]	6,033	[1]
Total assets	86,950		88,785		89,262
Deposits in domestic offices:
NOW and money market deposit accounts	30,573		27,954		27,548
Savings deposits	2,393		1,962		1,968
Certificates of deposit ($100,000 or more)	3,226		4,111		4,457
Other time deposits	4,941		6,243		6,695
Total interest-bearing	41,133		40,270		40,668
Noninterest-bearing	22,486		21,098		19,803
Deposits in foreign office - interest-bearing	569		588		561
Total deposits	64,188		61,956		61,032
Federal funds purchased and securities sold under repurchase agreements	1,746		1,711		1,728
Bank notes and other short-term borrowings	388		337		519
Derivative liabilities	657		1,026		1,141
Accrued expense and other liabilities	1,238		1,763		1,556
Long-term debt	6,119		9,520		10,717
Discontinued liabilities (including $2,335 of consolidated education loan securitization trust VIEs at fair value, see Note 9)	2,335	[1]	2,550	[1]	2,651	[1]
Total liabilities	76,671		78,863		79,344
Preferred stock, $1 par value, authorized 25,000,000 shares:
7.75% Noncumulative Perpetual Convertible Preferred Stock, Series A, $100 liquidation preference; authorized 7,475,000 shares; issued 2,904,839, 2,904,839 and 2,904,839 shares	291		291		291
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
Capital surplus	4,118		4,194		4,191
Retained earnings	6,762		6,246		6,079
Treasury stock, at cost (80,775,030, 63,962,113 and 64,161,618)	(1,868)		(1,815)		(1,820)
Accumulated other comprehensive income (loss)	(69)		(28)		143
Key shareholders' equity	10,251		9,905		9,901
Noncontrolling interests	28		17		17
Total equity	10,279		9,922		9,918
Total liabilities and equity	$ 86,950		$ 88,785		$ 89,262

[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.