Consolidated Statements of Income (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Interest Income
Interest and fees on loans and leases	$ 1,492	$ 1,523	$ 2,994	$ 3,043
Interest and dividends on securities	230	163	464	313
Interest on other earning assets	6	4	13	10
Total interest income	1,728	1,690	3,471	3,366
Interest Expense
Interest on deposits	107	152	228	323
Interest on federal funds purchased, securities sold under repurchase agreements and short-term borrowed funds	2	3	3	7
Interest on long-term debt	157	181	342	397
Total interest expense	266	336	573	727
Net Interest Income	1,462	1,354	2,898	2,639
Provision for credit losses	273	328	561	668
Net Interest Income After Provision for Credit Losses	1,189	1,026	2,337	1,971
Noninterest Income
Insurance income	393	299	664	549
Service charges on deposits	138	145	275	280
Mortgage banking income	182	83	398	178
Investment banking and brokerage fees and commissions	88	90	177	177
Checkcard fees	45	79	88	151
Bankcard fees and merchant discounts	59	52	113	98
Trust and investment advisory revenues	46	45	91	88
Income from bank-owned life insurance	27	29	57	59
FDIC loss share income, net	(74)	(81)	(131)	(139)
Other income	64	48	116	62
Securities gains (losses), net
Realized gains (losses), net	0	16	(4)	37
Other-than-temporary impairments	(2)	(10)	(5)	(11)
Non-credit portion recognized in other comprehensive income	0	(8)	(2)	(28)
Total securities gains (losses), net	(2)	(2)	(11)	(2)
Total noninterest income	966	787	1,837	1,501
Noninterest Expense
Personnel expense	775	683	1,505	1,377
Foreclosed property expense	72	145	164	288
Occupancy and equipment expense	159	152	312	306
Loan processing expenses	62	57	125	113
Regulatory charges	43	59	84	120
Professional services	39	38	74	69
Software expense	32	29	64	55
Amortization of intangibles	29	25	51	51
Merger-related and restructuring charges, net	2	2	14	0
Other expenses	213	205	418	388
Total noninterest expense	1,426	1,395	2,811	2,767
Earnings
Income before income taxes	729	418	1,363	705
Provision for income taxes	191	91	380	144
Net income	538	327	983	561
Noncontrolling interests	20	20	34	29
Preferred stock dividends	8	0	8	0
Net income available to common shareholders	$ 510	$ 307	$ 941	$ 532
Earnings Per Common Share
Basic	$ 0.73	$ 0.44	$ 1.35	$ 0.76
Diluted	$ 0.72	$ 0.44	$ 1.33	$ 0.76
Cash dividends declared	$ 0.20	$ 0.16	$ 0.40	$ 0.33
Weighted Average Shares Outstanding
Basic	698,579	696,625	698,132	695,971
Diluted	708,454	704,969	707,990	704,583