Fair Value of Assets and Liabilities (Changes in Fair Values Recorded in Earnings for FVO Assets-Liabilities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Long-term Investments [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 24	$ 9	$ 42	$ 31
Commercial Mortgage Loans [Member]
Changes in instrument-specific credit risk	0	0	0	0
Other changes in fair value	0	2	0	2
Notes Issued By Consolidated V I E [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ (3)	$ 0	$ 1	$ (2)