Mortgage Banking Noninterest Income (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Servicing fees:
Contractually specified servicing fees	$ 1,175	$ 1,154	$ 2,320	$ 2,261
Late charges	75	88	169	178
Ancillary fees	74	111	163	217
Unreimbursed direct servicing costs	(222)	(130)	(413)	(380)
Net servicing fees	1,102	1,223	2,239	2,276
Changes in fair value:
Due to changes in valuation model inputs or assumptions	(1,075)	(2,661)	(576)	(3,438)
Other changes in fair value	(535)	(575)	(1,115)	(1,194)
Total changes in fair value of MSRs measured at fair value	(1,610)	(3,236)	(1,691)	(4,632)
Amortization	(63)	(56)	(127)	(113)
Provision for MSRs in excess of fair value	(1)	0	(7)	0
Net derivative gains (losses) from economic hedges	1,449	3,287	1,329	5,053
Total servicing income, net	877	1,218	1,743	2,584
Net gains on mortgage loan origination/sales activities	742	793	1,892	1,897
Total mortgage banking noninterest income	1,619	2,011	3,635	4,481
Market related valuation changes to MSRs, net of hedge results	$ 374	$ 626	$ 753	$ 1,615