Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
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	$ 322	$ 323	$ 601
Non-cash financing activities related to the issuance of shares for vested restricted stock units	94	39	18
Liabilities for collateral received reported in other liabilities and accrued expenses	609	784	419
Obligations to return cash collateral for over-the-counter ("OTC") and cleared derivatives reported in other liabilities and accrued expenses or other investments	15	24	43
Net change in proceeds managed
Net change in short-term investments	190	(341)	21
Operating cash flow provided (used)	190	(341)	21
Net change in cash	(6)	(5)	1
Net change in proceeds managed	184	(346)	22
Net change in liabilities
Liabilities for collateral, beginning of year	(808)	(462)	(484)
Liabilities for collateral, end of year	(624)	(808)	(462)
Operating cash flow (used) provided	$ (184)	$ 346	$ (22)