Goodwill and Other Intangible Assets - Mortgage Servicing Rights Narrative (Details 4) (USD $)	12 Months Ended						3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Consumer & Community Banking [Member]	Dec. 31, 2012 Consumer & Community Banking [Member]	Dec. 31, 2011 Consumer & Community Banking [Member]	Dec. 31, 2011 Option Adjusted Spread Assumption Used To Value Mortgage Servicing Rights [Member]	Dec. 31, 2011 Prepayment Model Used To Value Mortgage Servicing Rights [Member]
Servicing Assets at Fair Value [Line Items]
Mortgage servicing right, increase (decrease)			$ (6,400,000,000)
Gains (loss) in fair value due to market interest rates	2,122,000,000	(589,000,000)	(5,392,000,000)			(5,400,000,000)
Gain (loss) on derivative, net, real estate mortgages related and other adjustments				(1,875,000,000)	1,252,000,000	5,553,000,000
Change in fair value resulting from changes in cost to service assumptions			(1,700,000,000)
Change in option adjusted spread adjustments							4.00%
Other changes in fair value resulting from changes in valuation inputs or changes in assumptions								$ 1,200,000,000