Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]
Non-cash modifications of certain mortgage loans, fixed income securities, limited partnerships and other investments, as well as mergers completed with equity securities	$ 89	$ 259
Net change in proceeds managed
Net change in short-term investments	(151)	199
Operating cash flow (used) provided	(151)	199
Net change in cash	0	(1)
Net change in proceeds managed	(151)	198
Net change in liabilities
Liabilities for collateral, beginning of period	(328)	(561)
Liabilities for collateral, end of period	(479)	(363)
Operating cash flow provided (used)	$ 151	$ (198)