Goodwill and Other Intangible Assets - Mortgage Fees and Related Income (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Risk management:
All other	$ 2	$ 2
Mortgage fees and related income	1,452	2,010
Consumer & Community Banking
Net production revenue:
Production revenue	995	1,432
Repurchase Losses	(81)	(302)
Net production revenue	914	1,130
Operating revenue:
Loan servicing revenue	936	1,039
Changes in MSR asset fair value due to modeled amortization	(258)	(351)
Total operating revenue	678	688
Risk management:
Changes in MSR asset fair value due to market interest rates	546	644
Other changes in MSR asset fair value due to inputs or assumptions in model	(237)	(48)
Change in derivative fair value and other	(451)	(406)
Total risk management	(142)	190
Net mortgage servicing revenue	$ 536	$ 878