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Revenue - Summary of Changes in Net Carrying Amount of Contract Assets and Contract Liabilities (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)
Revenue From Contract With Customer [Abstract]
Balance at December 31, 2020	$ 611
Provision	(1)
Billings	(226)
Revenue recognized	214
Currency translation adjustments and other	(21)
Balance at March 31, 2021	577
Balance at December 31, 2020	354
Billings	204
Revenue recognized	(205)
Currency translation adjustments and other	(4)
Balance at March 31, 2021	$ 349

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