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Income Taxes - Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Net operating loss, capital loss and tax credit carry-forwards | $ 186 | $ 150
Landfill and environmental remediation liabilities | 57 | 156
Operating lease liabilities | 131 | 114
Miscellaneous and other reserves, net | 99 | 150
Subtotal | 473 | 570
Valuation allowance | (150) | (162)
Deferred tax liabilities: |  |
Property and equipment | (956) | (842)
Goodwill and other intangibles | (1,059) | (865)
Operating lease right-of-use assets | (114) | (108)
Net deferred tax liabilities | $ (1,806) | $ (1,407)

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