Income Taxes (Details 7) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Dec. 31, 2006
Deferred Tax Liability Not Recognized [Line Items]
Federal and Foreign income tax benefits that would impact the rate	$ 95,000,000
Income Taxes (Amounts in paragraphs)
Effective tax rate on income from continuing operations	32.30%	19.50%	30.70%
Recognition of net tax benefits, as a result of the settlement		298,000,000	75,000,000
Recognition of net tax benefits as a result of settlement, interest portion			20,000,000
Recognition of net tax benefits, as a result of the settlement, in cash		66,000,000
Reduction in liability for uncertainty tax provisions		311,000,000	60,000,000
Estimated value of uncertain tax positions	135,000,000
Estimated value of uncertain tax positions - accrued interest	17,000,000
Valuation allowance	50,000,000
Retained earnings	9,699,000,000	8,124,000,000		5,600,000,000
Correction of Retained Earnings		121,000,000	121,000,000	121,000,000	121,000,000	121,000,000
Retained Earnings Prior to Correction				5,500,000,000
Federal income tax statutory rate	35.00%
Net interest income (expense) included in federal and foreign, and state income tax provisions	(5,000,000)	88,000,000	6,000,000
State and Local Jurisdiction
Deferred Tax Liability Not Recognized [Line Items]
Uncertain state tax benefits that would impact COS	40,000,000
JAPAN
Deferred Tax Liability Not Recognized [Line Items]
Unused net operating losses	16,000,000
Expiration period of unused net operating losses	2015 through 2018
NORWAY
Deferred Tax Liability Not Recognized [Line Items]
Unused net operating losses	23,000,000
Expiration period of unused net operating losses
UNITED KINGDOM
Deferred Tax Liability Not Recognized [Line Items]
Unused net operating losses	153,000,000
Expiration period of unused net operating losses
Accumulated undistributed foreign earnings
Deferred Tax Liability Not Recognized [Line Items]
Retained Earnings Accumulated Foreign	$ 761,000,000