Deferred Policy Acquisition Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance	$ 550	$ 901	$ 1,031
Deferred policy acquisition costs and present value of future profits, additions	701	665	690
Deferred policy acquisition costs and present value of future profits, periodic amortization	(644)	(618)	(616)
Deferred policy acquisition costs and present value of future profits, annuity unlocking	2	(37)	5
Deferred policy acquisition costs and present value of future profits, loss recognition charge		(79)
Deferred policy acquisition costs and present value of future profits, change included in realized gains	2	(1)	13
Deferred policy acquisition costs and present value of future profits, sale of subsidiaries		(108)
Deferred policy acquisition costs and present value of future profits, foreign currency translation	(1)
Deferred policy acquisition costs and present value of future profits, change in unrealized	365	(173)	(222)
Deferred policy acquisition costs and present value of future profits, ending balance	975	550	901
Property and Casualty Insurance [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beginning balance	204	189	181
Deferred policy acquisition costs, additions	468	438	433
Deferred policy acquisition costs, periodic amortization	(460)	(423)	(425)
Deferred policy acquisition costs, foreign currency translation	(1)
Deferred policy acquisition costs, ending balance	211	204	189
Annuity and Other [Member]
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred policy acquisition costs, beginning balance	787	916	812
Deferred policy acquisition costs, additions	222	212	239
Deferred policy acquisition costs, periodic amortization	(140)	(148)	(146)
Deferred policy acquisition costs, annuity unlocking	4	(33)	(2)
Deferred policy acquisition costs, loss recognition charge		(67)
Deferred policy acquisition costs, change included in realized gains	2	(1)	13
Deferred policy acquisition costs, sale of subsidiaries		(92)
Deferred policy acquisition costs, ending balance	875	787	916
Movement in Deferred Sales Inducements [Roll Forward]
Deferred sales inducements, beginning balance	170	189	189
Deferred sales inducements, additions	11	15	18
Deferred sales inducements, periodic amortization	(30)	(30)	(24)
Deferred sales inducements, annuity unlocking	(2)	(4)	6
Deferred sales inducements, ending balance	149	170	189
Movement in Present Value of Future Insurance Profits [Roll Forward]
Present value of future profits, beginning balance	99	144	164
Present value of future profits, periodic amortization	(14)	(17)	(21)
Present value of future profits, annuity unlocking			1
Present value of future profits, loss recognition charge		(12)
Present value of future profits, sale of subsidiaries		(16)
Present value of future profits, ending balance	85	99	144
Movement in Unrealized Gains (Losses) Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Unrealized investment gains (losses), beginning balance	(710)	(537)	(315)
Unrealized investment gains (losses), change in unrealized	365	(173)	(222)
Unrealized investment gains (losses), ending balance	(345)	(710)	(537)
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward]
Deferred policy acquisition costs and present value of future profits, beginning balance	346	712	850
Deferred policy acquisition costs and present value of future profits, additions	233	227	257
Deferred policy acquisition costs and present value of future profits, periodic amortization	(184)	(195)	(191)
Deferred policy acquisition costs and present value of future profits, annuity unlocking	2	(37)	5
Deferred policy acquisition costs and present value of future profits, loss recognition charge		(79)
Deferred policy acquisition costs and present value of future profits, change included in realized gains	2	(1)	13
Deferred policy acquisition costs and present value of future profits, sale of subsidiaries		(108)
Deferred policy acquisition costs and present value of future profits, change in unrealized	365	(173)	(222)
Deferred policy acquisition costs and present value of future profits, ending balance	$ 764	$ 346	$ 712