Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Maximum term length, investment cash flow hedges	7 years
Amounts excluded from assessment of hedge effectiveness	$ 0		$ 0
Gains (losses) recognized due to hedge ineffectiveness	0		0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	202				203
Gain (Loss) Recognized in Other Comprehensive Income	0		2
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	44				45
Gain (Loss) Recognized in Other Comprehensive Income	(1)		(1)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	118				118
Gain (Loss) Recognized in Other Comprehensive Income	2	[1]	4	[1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	40				40
Gain (Loss) Recognized in Other Comprehensive Income	(1)		(1)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member]
Derivatives, Fair Value [Line Items]
Fair Value	2				3
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	1				2
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	1				1
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	0				0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair Value	16				15
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	0				0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	12				13
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	4				2
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	$ 300

[1] Other comprehensive income for foreign currency swaps excludes amounts required to adjust future policy benefits for the run-off settlement annuity business.