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Deferred Income Tax Assets And Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Net tax loss carryforwards | $ 1,645 | $ 1,390
Operating Lease, Liability, Noncurrent | 678 | 0
Accrued liabilities and deferred income | 236 | 230
Tax credits | 20 | 17
Depreciation and amortization | 17 | 16
Provision for doubtful accounts | 8 | 6
Other | 75 | 38
Valuation allowance | (214) | (311)
Deferred income tax assets | 2,465 | 1,386
Operating Lease, Right-of-Use Asset | 672 | 0
Depreciation and amortization | 108 | 60
Deferred Tax Liabilities, Prepaid Expenses | 17 | 20
Other | 6 | 5
Non-current deferred income tax liabilities | 803 | 85
Non-current net deferred income tax assets | 1,662 | 1,301
Deferred Income Tax Assets and Liabilities Additional Information (Detail) [Abstract] |  |
Deferred Tax Assets, Valuation Allowance | 214 | 311
Deferred Tax Assets Operating Loss Carryforward With Valuation Against It | 192 | 283
Deferred Tax Assets State And Local | 22 | 28
Vehicle Programs |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Depreciation and amortization | 54 | 44
Depreciation and amortization | 2,243 | 2,005
Other Liabilities [Member] |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Other | 48 | 0
Liability [Member] |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Non-current deferred income tax liabilities | 2,291 | 2,005
Other Assets [Member] |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Other | 48 | 0
Deferred Tax Asset [Domain] |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Deferred income tax assets | 102 | 44
Vehicle programs, net [Member] |  |
Deferred Income Tax Assets And Liabilities [Line Items] |  |
Deferred Tax Liabilities, Net | $ 2,189 | $ 1,961

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