Receivables (Details 2) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Nonaccrual receivable
Total nonaccrual receivables	$ 5,034	$ 6,874
Real estate secured [Member]
Nonaccrual receivable
Total nonaccrual receivables	2,536	6,544
Personal non-credit card [Member]
Nonaccrual receivable
Total nonaccrual receivables		330
Nonaccrual receivables held for sale [Member]
Nonaccrual receivable
Total nonaccrual receivables	$ 2,498