Income Taxes (Details 5) (USD $) In Millions, unless otherwise specified	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Forecast	Dec. 31, 2013 UNITED KINGDOM
Deferred Tax Assets, Gross [Abstract]
Valuation allowance against tax assets	$ 55	$ 52
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal income tax statutory rate	35.00%
Income Tax Contingency [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit			80
Income Tax Expense Benefit, Period Increase (Decrease)			(50)
Estimated value of uncertain tax positions - accrued interest and penalties	31
Federal and foreign income tax benefits that would impact the rate	190
Operating Loss Carryforwards				$ 189