Income Taxes - Deferred Income Tax Assets And Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred income tax assets:
Net tax loss carryforwards	$ 1,480	$ 1,146
Long-term operating lease liabilities	625	657
Accrued liabilities and deferred revenue	272	237
Tax credits	11	17
Depreciation and amortization	19	3
Provision for doubtful accounts	18	8
Other	100	110
Valuation allowance	167	204
Deferred income tax assets	2,358	1,974
Deferred income tax liabilities:
Operating lease right-of-use assets	614	649
Depreciation and amortization	102	105
Prepaid expenses	23	8
Other	4	14
Deferred income tax liabilities under vehicle programs, net	743	776
Deferred income tax assets, net	1,615	1,198
Tax loss carryforwards	163	195
Deferred tax assets	$ 4	$ 9