Variable Interest Entities ("VIE's") (Consolidated Variable Interest Entity Asset and Liability Information) (Details) $ in Millions		Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) item
Assets
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item	[1]	1	1
Notional Amounts	[1]	$ 479	$ 423
Carrying Value	[1]	$ 598	$ 598
Assets | Fixed maturity corporate asset-backed credit card loan securities
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item
Notional Amounts
Carrying Value		$ 598	$ 598
Assets | Total Return Swap [Member]
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item		1	1
Notional Amounts		$ 479	$ 423
Liabilities
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item	[2]	4	4
Notional Amounts	[2]	$ 600	$ 600
Carrying Value	[2]	$ 4	$ 13
Liabilities | Credit default swaps | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item		2	2
Notional Amounts		$ 600	$ 600
Carrying Value		$ 4	$ 13
Liabilities | Contingent forwards | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments
Disclosure Of Variable Interest Entities Assets And Liabilities [Line Items]
Number of Instruments | item		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.