Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Supplemental Cash Flow Information
Non-cash modifications of certain mortgage loans, fixed income securities, limited partnership interests and other investments, as well as mergers completed with equity securities	$ 86	$ 203
Non-cash financing activities related to the issuance of shares for vested restricted stock units	45	92
Net change in proceeds managed
Net change in short-term investments	(284)	113
Operating cash flow (used) provided	(284)	113
Net change in cash	1	3
Net change in proceeds managed	(283)	116
Net change in liabilities
Liabilities for collateral, beginning of period	(624)	(808)
Liabilities for collateral, end of period	(907)	(692)
Operating cash flow provided (used)	$ 283	$ (116)