Goodwill and Other Intangible Assets - Mortgage Fees and Related Income (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Risk management:
All other	$ 10	$ 7	$ 7
Mortgage fees and related income	5,205	8,687	2,721
Consumer & Community Banking [Member]
Net production revenue:
Production revenue	2,673	5,783	3,395
Repurchase losses	331	(272)	(1,347)
Net production revenue	3,004	5,511	2,048
Operating revenue:
Loan servicing revenue	3,552	3,772	4,134
Changes in MSR asset fair value due to modeled amortization	(1,094)	(1,222)	(1,904)
Total operating revenue	2,458	2,550	2,230
Risk management:
Changes in MSR asset fair value due to market interest rates	2,119	(587)	(5,390)
Other changes in MSR asset fair value due to inputs or assumptions in model	(511)	(46)	(1,727)
Derivative valuation adjustments and other	(1,875)	1,252	5,553
Total risk management	(267)	619	(1,564)
Total CCB net mortgage servicing revenue	$ 2,191	$ 3,169	$ 666