Consolidated Statement of Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Noninterest income
Total recorded as part of gross realized losses	$ 21	$ 13	$ 52	$ 22
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Equity Securities and Nonmarketable Equity Securities	76	69	118	197
Total debt securities [Member]
Noninterest income
Total OTTI losses (reversal of losses) recorded on debt securities	10	3	4	(11)
Total recorded as part of gross realized losses	20	13	51	20
Total reversal of losses recognized in OCI as non-credit-related impairment	$ (10)	$ (10)	$ (47)	$ (31)