Loans - Consumer, Excluding Credit Card Loans, PCI Delinquency Statistics (Details) (USD $) In Millions, unless otherwise specified												12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Consumer, excluding credit card [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member]	Dec. 31, 2011 Consumer, excluding credit card [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] Purchased Credit-Impaired, Home Equity Senior Lien [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 30-89 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 30-89 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 30-89 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 30-89 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 30-89 days past due [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 30-89 days past due [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 30-89 days past due [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 30-89 days past due [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 90-149 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 90-149 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 90-149 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 90-149 days past due [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 90-149 days past due [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 90-149 days past due [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 90-149 days past due [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 90-149 days past due [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 150plus days past [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 150plus days past [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Excluding Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 150plus days past [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 150plus days past [Member] Purchased Credit-Impaired, Home Equity Junior Lien [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 150plus days past [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 150plus days past [Member] HELOC, Within the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2013 Consumer, excluding credit card [Member] 150plus days past [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]	Dec. 31, 2012 Consumer, excluding credit card [Member] 150plus days past [Member] HELOCs, Beyond the revolving period [Member] Purchased Credit-Impaired, Home Equity Junior Lien, Lines of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Percentage of senior liens to total financing receivables							20.00%
Total retained loans	$ 724,177	$ 726,835	$ 718,997	$ 288,449	$ 292,620	$ 308,427		$ 908	$ 1,085	$ 15,914	$ 17,666	$ 12,670	$ 15,915	$ 2,336	$ 666	$ 24	$ 37	$ 321	$ 428	$ 243	$ 361	$ 54	$ 30	$ 11	$ 18	$ 120	$ 206	$ 88	$ 175	$ 21	$ 13	$ 39	$ 44	$ 647	$ 655	$ 526	$ 591	$ 82	$ 20
Total 30 plus day delinquency rate								8.15%	9.12%	6.84%	7.30%	6.76%	7.08%	6.72%	9.46%
Home equity line of credit, open-ended revolving period												10 years