Summary of Significant Accounting Policies and New Accounting Pronouncements - Reclassifications (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Trading assets	$ (28,894)	$ (30,874)
Trading Liabilities	(10,875)	(14,699)
Restatement Adjustment [Member] | Elimination of Intercompany Trading Assets and Liabilities [Member]
Trading assets		5,100
Trading Liabilities		$ 5,100