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Revenue - Summary of Changes in Carrying Amount of Contract Assets and Contract Liabilities (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Revenue From Contract With Customer [Abstract]
Balance at December 31, 2019	$ 643
Provision	(4)
Billings	(373)
Revenue recognized	253
Currency translation adjustments and other	(11)
Balance at June 30, 2020	508
Balance at December 31, 2019	427
Billings	598
Revenue recognized	(609)
Currency translation adjustments and other	(8)
Balance at June 30, 2020	$ 408

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