Deferred Income Tax Assets And Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Income Tax Assets And Liabilities [Line Items]
Net tax loss carryforwards	$ 1,567	$ 1,483
Accrued liabilities and deferred income	276	297
Tax credits	76	75
Depreciation and amortization	13	23
Acquisition and integration-related liabilities	13	8
Provision for doubtful accounts	7	7
Deferred Tax Assets, Hedging Transactions	0	1
Other	46	57
Valuation allowance	(351)	(319)
Deferred income tax assets	1,647	1,632
Depreciation and amortization	123	96
Deferred Tax Liabilities, Prepaid Expenses	29	21
Other	7	4
Non-current deferred income tax liabilities	159	121
Non-current net deferred income tax assets	1,488	1,511
Deferred Income Tax Assets and Liabilities Additional Information (Detail) [Abstract]
Deferred Tax Assets, Valuation Allowance	351	319
Deferred Tax Assets Operating Loss Carryforward With Valuation Against It	267	249
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	53	46
Deferred Tax Assets State And Local	31	24
Vehicle Programs
Deferred Income Tax Assets And Liabilities [Line Items]
Depreciation and amortization	53	54
Depreciation and amortization	2,420	2,321
Deferred Tax Liabilities, Net	$ 2,367	$ 2,267