Outstanding Loans and Leases (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010
Trial Modifications [Abstract]
Number of Loans In Trial Modifications	2,446				2,446
Trial Modifications Unpaid Principal Balance	$ 485				$ 485
Trial Modifications Carrying Value	341				341
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Contractual Interest Rate Reduction [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	161				942
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Contractual Interest Rate Reduction [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	807				3,090
Residential Portfolio Segment [Member] | Home Equity [Member] | Contractual Interest Rate Reduction [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	21				175
Residential Portfolio Segment [Member] | Home Equity [Member] | Contractual Interest Rate Reduction [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	29				68
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Contractual Interest Rate Reduction [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	2				8
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Contractual Interest Rate Reduction [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	5				16
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	184				1,125
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	841				3,174
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Principal Interest Forbearance [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	54				173
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Principal Interest Forbearance [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	328				678
Residential Portfolio Segment [Member] | Home Equity [Member] | Principal Interest Forbearance [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	8				35
Residential Portfolio Segment [Member] | Home Equity [Member] | Principal Interest Forbearance [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	13				36
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Principal Interest Forbearance [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	0				5
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Principal Interest Forbearance [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	2				5
Residential Portfolio Segment [Member] | Principal Interest Forbearance [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	62				213
Residential Portfolio Segment [Member] | Principal Interest Forbearance [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	343				719
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Other Modifications [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	23	[1]			86	[1]
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Other Modifications [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	204	[1]			406	[1]
Residential Portfolio Segment [Member] | Home Equity [Member] | Other Modifications [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	3	[1]			11	[1]
Residential Portfolio Segment [Member] | Home Equity [Member] | Other Modifications [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	12	[1]			35	[1]
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Other Modifications [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	1	[1]			2	[1]
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Other Modifications [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	3	[1]			1	[1]
Residential Portfolio Segment [Member] | Other Modifications [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	27	[1]			99	[1]
Residential Portfolio Segment [Member] | Other Modifications [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	219	[1]			442	[1]
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Capitlization Of Past Due Amounts [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	100				388
Residential Portfolio Segment [Member] | Home Equity [Member] | Capitlization Of Past Due Amounts [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	0				0
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Capitlization Of Past Due Amounts [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	0				0
Residential Portfolio Segment [Member] | Capitlization Of Past Due Amounts [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	100				388
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	238	[2]			1,201	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	61				163
Residential Portfolio Segment [Member] | Home Equity [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	32	[2]			221	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	2				2
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	3	[2]			15	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	0				1
Residential Portfolio Segment [Member] | Government Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	273	[2]			1,437	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	63				166
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	1,439	[2]			4,562	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	573				1,483
Residential Portfolio Segment [Member] | Home Equity [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	54	[2]			139	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	7				37
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	10	[2]			22	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	1				8
Residential Portfolio Segment [Member] | Proprietary Modifications [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Carrying Value	1,503	[2]			4,723	[2]
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	581				1,528
Residential Portfolio Segment [Member]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Unpaid Principal Balance	2,096				7,341
Troubled Debt Restructurings Carrying Value	1,776				6,160
Troubled Debt Restructurings Pre Modification Interest Rate	6.09%				6.17%
Troubled Debt Restructuring Post Modification Interest Rate	4.95%				5.06%
Troubled Debt Restructuring Net Charge Offs	34				246
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	644				1,694
Residential Portfolio Segment [Member] | Residential Mortgage [Member]
Impaired Loans [Abstract]
Unpaid Principal Balance	19,950				19,950				14,086
Carrying Value	16,516				16,516				11,788
Related Allowance	1,274				1,274				1,154
Average Carrying Value	15,827		10,060		14,820		9,086		9,655
Interest Income Recognized	142	[3]	96	[3]	405	[3]	276	[3]	380	[3]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Unpaid Principal Balance	1,931				6,670
Troubled Debt Restructurings Carrying Value	1,677				5,763
Troubled Debt Restructurings Pre Modification Interest Rate	5.92%				6.04%
Troubled Debt Restructuring Post Modification Interest Rate	4.82%				4.97%
Troubled Debt Restructuring Net Charge Offs	19				113
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	634				1,646
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Impaired Financing Receivable with No Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	9,373				9,373				5,493
Carrying Value	7,161				7,161				4,382
Average Carrying Value	6,280		5,044		5,778		4,057		4,429
Interest Income Recognized	54	[3]	51	[3]	170	[3]	131	[3]	184	[3]
Residential Portfolio Segment [Member] | Residential Mortgage [Member] | Impaired Financing Receivable with Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	10,577				10,577				8,593
Carrying Value	9,355				9,355				7,406
Related Allowance	1,274				1,274				1,154
Average Carrying Value	9,547		5,016		9,042		5,029		5,226
Interest Income Recognized	88	[3]	45	[3]	235	[3]	145	[3]	196	[3]
Residential Portfolio Segment [Member] | Home Equity [Member]
Impaired Loans [Abstract]
Unpaid Principal Balance	3,135				3,135				2,932
Carrying Value	1,752				1,752				1,721
Related Allowance	648				648				676
Average Carrying Value	1,791		1,879		1,812		2,067		2,002
Interest Income Recognized	15	[3]	12	[3]	40	[3]	33	[3]	44	[3]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Unpaid Principal Balance	144				616
Troubled Debt Restructurings Carrying Value	86				360
Troubled Debt Restructurings Pre Modification Interest Rate	7.90%				7.50%
Troubled Debt Restructuring Post Modification Interest Rate	6.47%				5.99%
Troubled Debt Restructuring Net Charge Offs	15				131
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	9				39
Residential Portfolio Segment [Member] | Home Equity [Member] | Impaired Financing Receivable with No Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	1,519				1,519				1,411
Carrying Value	418				418				437
Average Carrying Value	407		506		437		472		493
Interest Income Recognized	6	[3]	6	[3]	16	[3]	15	[3]	21	[3]
Residential Portfolio Segment [Member] | Home Equity [Member] | Impaired Financing Receivable with Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	1,616				1,616				1,521
Carrying Value	1,334				1,334				1,284
Related Allowance	648				648				676
Average Carrying Value	1,384		1,373		1,375		1,595		1,509
Interest Income Recognized	9	[3]	6	[3]	24	[3]	18	[3]	23	[3]
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member]
Impaired Loans [Abstract]
Unpaid Principal Balance	617				617				608
Carrying Value	391				391				395
Related Allowance	32				32				41
Average Carrying Value	311		395		368		387		389
Interest Income Recognized	4	[3]	4	[3]	11	[3]	11	[3]	15	[3]
Troubled Debt Restructurings [Abstract]
Troubled Debt Restructurings Unpaid Principal Balance	21				55
Troubled Debt Restructurings Carrying Value	13				37
Troubled Debt Restructurings Pre Modification Interest Rate	7.79%				7.71%
Troubled Debt Restructuring Post Modification Interest Rate	6.16%				5.17%
Troubled Debt Restructuring Net Charge Offs	0				2
Troubled Debt Restructurings Modifications Entering Default [Abstract]
Troubled Debt Restructurings Modifications Entering Default	1				9
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Impaired Financing Receivable with No Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	397				397				361
Carrying Value	227				227				218
Average Carrying Value	210		207		218		218		219
Interest Income Recognized	2	[3]	2	[3]	6	[3]	6	[3]	8	[3]
Residential Portfolio Segment [Member] | Financing Receivable Recorded Investment Class Of Financing Receivable Discontinued Real Estate [Member] | Impaired Financing Receivable with Related Allowance [Domain]
Impaired Loans [Abstract]
Unpaid Principal Balance	220				220				247
Carrying Value	164				164				177
Related Allowance	32				32				41
Average Carrying Value	101		188		150		169		170
Interest Income Recognized	2	[3]	2	[3]	5	[3]	5	[3]	7	[3]
Residential Mortgage [Member]
Impaired Loans [Abstract]
Real Estate Acquired Through Foreclosure	$ 1,900				$ 1,900				$ 1,200

[1] Includes other modifications such as term or payment extensions, principal and/or interest forgiveness and other.

[2] See definition on page 174

[3] Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the ultimate collectability of principal is not uncertain