Securities Financing Activities - Schedule of Securities Sold Under Repurchase Agreements, Netting & Securities Loaned (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Securities Financing Transaction [Line Items]
Securities sold under repurchase agreements with an appropriate legal opinion, gross liability balance	$ 300,208,000,000	$ 257,630,000,000
Amounts netted on the Consolidated Balance Sheets	(124,143,000,000)	(115,408,000,000)
Securities sold under repurchase agreements with an appropriate legal opinion, Net liability balance	176,065,000,000	142,222,000,000
Securities sold under repurchase agreements where an appropriate legal opinion has not been either sought or obtained(a)	18,910,000,000	18,143,000,000
Total securities sold under repurchase agreements, Gross liability balance	319,118,000,000	275,773,000,000
Total securities sold under repurchase agreements, Net liability balance	194,975,000,000	160,365,000,000
Securities loans	26,206,000,000	25,769,000,000
Securities loaned where an appropriate legal opinion has not been sought or obtained with respect to master netting agreement	472,000,000	397,000,000
Securities-For-Securities Borrow Versus Pledge Transactions
Securities Financing Transaction [Line Items]
Securities loans	5,700,000,000	5,800,000,000
Securities Financing Transaction, Fair Value
Securities Financing Transaction [Line Items]
Total securities sold under repurchase agreements, Net liability balance	2,600,000,000	4,900,000,000
Securities loans	$ 0	$ 483,000,000