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Income Taxes - Net Deferred Tax Liabilities Presented on Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Long-term deferred tax assets	$ 372	$ 308
Long-term deferred tax liabilities	(452)	(419)
Net deferred tax liabilities	$ (80)	$ (111)

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting, and liabilities classified as noncurrent and other.

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