Deferred Income Tax Assets And Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred Income Tax Assets And Liabilities [Line Items]
Net tax loss carryforwards	$ 1,587	$ 1,567
Accrued liabilities and deferred income	281	276
Tax credits	62	76
Depreciation and amortization	2	13
Acquisition and integration-related liabilities	5	13
Provision for doubtful accounts	7	7
Other	52	46
Valuation allowance	(357)	(351)
Deferred income tax assets	1,639	1,647
Depreciation and amortization	112	123
Deferred Tax Liabilities, Prepaid Expenses	32	29
Other	2	7
Non-current deferred income tax liabilities	146	159
Non-current net deferred income tax assets	1,493	1,488
Deferred Income Tax Assets and Liabilities Additional Information (Detail) [Abstract]
Deferred Tax Assets, Valuation Allowance	357	351
Deferred Tax Assets Operating Loss Carryforward With Valuation Against It	289	267
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	39	53
Deferred Tax Assets State And Local	29	31
Vehicle Programs
Deferred Income Tax Assets And Liabilities [Line Items]
Depreciation and amortization	52	53
Depreciation and amortization	2,481	2,420
Deferred Tax Liabilities, Net	$ 2,429	$ 2,367