Loans - Consumer Loans Excluding Credit Card, Junior Lien Delinquencies (Details 6d) (USD $)				3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Mar. 31, 2012 Within the Revolving Period [Member]	Mar. 31, 2012 Within the Required Amortization Period [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Current and less than 30 days past due and still accruing [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Current and less than 30 days past due and still accruing [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Nonaccrual [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Nonaccrual [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Nonaccrual [Member] Performing Financing Receivable [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Nonaccrual [Member] Current and less than 30 days past due and still accruing [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Loans [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Loans [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Home Equity Junior Lien [Member] Home Equity Loans [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 PCI Home Equity [Member]	Dec. 31, 2011 PCI Home Equity [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Revolving Period [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Lines of Credit [Member] Within the Required Amortization Period [Member] Days Past Due 150 Or More [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due, 30 to 89 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due, 30 to 89 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due 90 to 149 [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due 90 to 149 [Member]	Mar. 31, 2012 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due 150 Or More [Member]	Dec. 31, 2011 Purchased Credit-Impaired Home Equity Junior Liens [Member] Home Equity Loans [Member] Days Past Due 150 Or More [Member]
Consumer Loans Excluding Credit Card, Junior Lien Delinquencies [Line Items]
Loans And Leases Receivable Deferred Costs	$ 2,700,000,000	$ 2,700,000,000
Approximate percentage of the PCI home equity portfolio consisting of senior lien loans																																												20.00%
Retained loans	$ 712,898,000,000	$ 718,997,000,000	$ 675,437,000,000			$ 54,005,000,000	$ 56,035,000,000	$ 52,697,000,000	$ 54,533,000,000	$ 741,000,000	$ 839,000,000	$ 336,000,000	$ 433,000,000	$ 231,000,000	$ 230,000,000	$ 2,277,000,000	$ 792,000,000	$ 1,559,000,000	$ 1,409,000,000	$ 45,990,000,000	$ 47,760,000,000	$ 546,000,000	$ 606,000,000	$ 239,000,000	$ 314,000,000	$ 175,000,000	$ 173,000,000	$ 1,764,000,000	$ 1,636,000,000	$ 39,000,000	$ 45,000,000	$ 15,000,000	$ 19,000,000	$ 18,000,000	$ 15,000,000	$ 6,251,000,000	$ 6,639,000,000	$ 156,000,000	$ 188,000,000	$ 82,000,000	$ 100,000,000	$ 38,000,000	$ 42,000,000	$ 22,305,000,000	$ 22,697,000,000	$ 19,358,000,000	$ 19,973,000,000	$ 479,000,000	$ 569,000,000	$ 273,000,000	$ 336,000,000	$ 592,000,000	$ 592,000,000	$ 17,610,000,000	$ 18,246,000,000	$ 419,000,000	$ 500,000,000	$ 240,000,000	$ 296,000,000	$ 539,000,000	$ 543,000,000	$ 483,000,000	$ 400,000,000	$ 17,000,000	$ 16,000,000	$ 9,000,000	$ 11,000,000	$ 8,000,000	$ 5,000,000	$ 1,265,000,000	$ 1,327,000,000	$ 43,000,000	$ 53,000,000	$ 24,000,000	$ 29,000,000	$ 45,000,000	$ 44,000,000
Percentage Of Loans Thirty Plus Days Past Due To Total Retained Loans						2.42%	2.68%													2.09%	2.29%							4.08%	4.83%							4.42%	4.97%							9.03%	9.50%	6.94%	7.50%							6.80%	7.34%							7.04%	8.00%							8.85%	9.50%
Home Equity Line of Credit, Open-ended Revolving Period				10 years
Home Equity Line of Credit, Amortization Period					20 years