Offsetting Assets and Liabilities (Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Total
Gross Amounts of Recognized Liabilities	$ 4,147		$ 4,682
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(2,919)	[1]	(3,154)	[1]
Cash Collateral	0		(2)
Securities Collateral	(1,228)		(1,515)
Net Amount	0		11
Repurchase agreements
Gross Amounts of Recognized Liabilities	50		50
Gross Amounts Not Offset in the Consolidated Balance Sheets
Securities Collateral	(50)		(50)
Securities Sold under Agreements to Repurchase	0		0
OTC derivatives
Derivatives
Gross Amounts of Recognized Liabilities	4,015		4,610
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(2,837)	[1]	(3,134)	[1]
Cash Collateral	0		0
Securities Collateral	(1,178)		(1,465)
Net Amount	0		11
Over the Counter Cleared Swaps [Member]
Derivatives
Gross Amounts of Recognized Liabilities	82		22
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(82)	[1]	(20)	[1]
Cash Collateral	0		(2)
Net Amount	0		0
Total Over the Counter Derivatives [Member] [Member]
Derivatives
Gross Amounts of Recognized Liabilities	4,097		4,632
Gross Amounts Not Offset in the Consolidated Balance Sheets
Financial Instruments	(2,919)	[1]	(3,154)	[1]
Cash Collateral	0		(2)
Securities Collateral	(1,178)		(1,465)
Net Amount	$ 0		$ 11

[1] Represents the amount of liabilities that could be offset by assets with the same counterparty under master netting or similar arrangements that management elects not to offset on the Consolidated Balance Sheets.