Variable Interest Entities ("VIE's") (Consolidated Variable Interest Entity Asset and Liability Information) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013 item		Dec. 31, 2012 item
Assets [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments	1	[1]	1	[1]
Notional Amounts	$ 100	[1]	$ 100	[1]
Carrying Value	699	[1]	708	[1]
Assets [Member] | Fixed maturity corporate asset-backed credit card loan securities [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments
Notional Amounts
Carrying Value	595		598
Assets [Member] | Fixed maturity U.S. Government Bonds [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments
Notional Amounts
Carrying Value	104		110
Assets [Member] | Excess mortality swap [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments	1		1
Notional Amounts	100		100
Carrying Value
Liabilities [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments	4	[2]	4	[2]
Notional Amounts	600	[2]	600	[2]
Carrying Value	67	[2]	128	[2]
Liabilities [Member] | Credit Default Swaps [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments	2		2
Notional Amounts	600		600
Carrying Value	67		128
Liabilities [Member] | Contingent Forwards [Member] | Derivative Instruments Not Designated And Not Qualifying As Hedging Instruments [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments	2		2
Notional Amounts
Carrying Value

[1] Reported in variable interest entities’ fixed maturity securities on our Consolidated Balance Sheets.

[2] Reported in variable interest entities’ liabilities on our Consolidated Balance Sheets.