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Income Tax - Income Tax Benefit (Expense) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
The Netherlands Taxes - current		$ 5us-gaap_CurrentFederalTaxExpenseBenefit	$ (1)us-gaap_CurrentFederalTaxExpenseBenefit
Foreign taxes - current	(120)us-gaap_CurrentForeignTaxExpenseBenefit	(90)us-gaap_CurrentForeignTaxExpenseBenefit	(130)us-gaap_CurrentForeignTaxExpenseBenefit
Total current taxes	(120)us-gaap_CurrentIncomeTaxExpenseBenefit	(85)us-gaap_CurrentIncomeTaxExpenseBenefit	(131)us-gaap_CurrentIncomeTaxExpenseBenefit
The Netherlands Taxes - deferred	0	0	0
Foreign taxes - deferred	143	48	80
Total deferred taxes	143us-gaap_DeferredIncomeTaxExpenseBenefit	48us-gaap_DeferredIncomeTaxExpenseBenefit	80us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax benefit (expense)	$ 23us-gaap_IncomeTaxExpenseBenefit	$ (37)us-gaap_IncomeTaxExpenseBenefit	$ (51)us-gaap_IncomeTaxExpenseBenefit
Effective tax rate	(21.00%)	(6.00%)	(2.00%)

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.