Derivative Financial Instruments Netting of Financial Instruments - Derivatives (parenthetical) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Derivative [Line Items]
Derivative Assets	$ 1,384	[1]	$ 2,083	[1]
Derivative Asset, Fair Value of Collateral	(457)		(730)
Derivative Liabilities	525	[2]	412	[2]
Derivative Liability, Fair Value of Collateral	(864)		(1,259)
Trading Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities	525		412
Derivative Liability, Fair Value of Collateral	(864)		(1,300)
Trading Account Assets [Member]
Derivative [Line Items]
Derivative Assets	1,400		2,100
Derivative Asset, Fair Value of Collateral	$ (457)		$ (730)

[1] At December 31, 2013, $1.4 billion, net of $457 million offsetting cash collateral, is recognized in trading assets and derivatives within the Company's Consolidated Balance Sheets. At December 31, 2012, $2.1 billion, net of $730 million offsetting cash collateral, is recognized in trading assets and derivatives within the Company's Consolidated Balance Sheets.

[2] At December 31, 2013, $525 million, net of $864 million offsetting cash collateral, is recognized in trading liabilities and derivatives within the Company's Consolidated Balance Sheets. At December 31, 2012, $412 million, net of $1.3 billion offsetting cash collateral, is recognized in trading liabilities and derivatives within the Company's Consolidated Balance Sheets.