Goodwill and Intangible Assets - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Bank Servicing Fees	$ 87	$ 260	$ 224
Goodwill, Transfers	0	0
Consumer Banking and Private Wealth Management [Member]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	56.00%
Wholesale Banking [Member]
Goodwill, Transfers	(300)	2,414
Wholesale Banking [Member] | Consumer Banking and Private Wealth Management [Member]
Goodwill, Transfers	300
Mortgage Servicing Rights, Fair Value [Member]
Bank Servicing Fees	317	333	364
Qualitative and Quantitative Information, Transferor's Continuing Involvement, Principal Amount Outstanding	136,700	144,900
Principal Amount Outstanding of Loans Serviced For Third Parties	106,800	113,200
Loan Principal Amount Outstanding Underlying Mortgage Servicing Rights Sold	$ 2,800	$ 2,100