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Income Taxes - Summary of Changes in Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefits beginning balance	$ 452	$ 474	$ 463
Increases (decreases):
Increases in tax positions for prior years	1	4	35
Decreases in tax positions for prior years	(4)	0	(31)
Increase in tax positions for the current period	23	40	84
Purchase accounting adjustments (See Footnote 1)	0	0	(9)
Settlements with taxing authorities	(2)	0	(2)
Lapse of statute of limitations	(12)	(66)	(66)
Cumulative translation adjustments	(1)	0	0
Unrecognized tax benefits ending balance	$ 457	$ 452	$ 474

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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