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Income Taxes - Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss, capital loss and tax credit carry-forwards	$ 189	$ 186
Landfill and environmental remediation liabilities	238	202
Operating lease liabilities	135	141
Miscellaneous and other reserves, net	113	103
Subtotal	675	632
Valuation allowance	(158)	(150)
Deferred tax liabilities:
Property and equipment	(1,064)	(1,137)
Goodwill and other intangibles	(1,027)	(1,027)
Operating lease right-of-use assets	(120)	(124)
Net deferred tax liabilities	$ (1,694)	$ (1,806)

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