Receivables (Details 5) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Trouble debt restructuring loans
Total TDR Loans	$ 15,112	$ 15,584
Total credit loss reserves for TDR Loans	3,746	4,409
Total TDR Loans	18,973	17,279
First lien [Member]
Trouble debt restructuring loans
Total TDR Loans	13,360	13,186
Total credit loss reserves for TDR Loans	3,185	3,169
Total TDR Loans	16,407	14,813
Second lien [Member]
Trouble debt restructuring loans
Total TDR Loans	1,153	1,057
Total credit loss reserves for TDR Loans	561	534
Total TDR Loans	1,283	1,125
Total real estate secured [Member]
Trouble debt restructuring loans
Total TDR Loans	14,513	14,243
Total credit loss reserves for TDR Loans	3,746	3,703
Total TDR Loans	17,690	15,938
Personal non-credit card [Member]
Trouble debt restructuring loans
Total TDR Loans	599	1,341
Total credit loss reserves for TDR Loans		706
Total TDR Loans	$ 1,283	$ 1,341