Derivative Instruments - Derivatives Collateral (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Derivative receivable collateral:
Net derivative receivables	$ 53,246	$ 58,258
Collateral not nettable on the Consolidated balance sheets	(13,214)	(16,194)
Net exposure	40,032	42,064
Derivative payable collateral:
Net derivative payables	45,597	52,046
Collateral not nettable on the Consolidated balance sheets	(9,093)	(10,505)
Net amount	$ 36,504	$ 41,541