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Revenue Recognition - Summary of Changes in Carrying Amount of Contract Assets and Contract Liabilities (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Change in Contract with Customer, Asset and Liability [Abstract]
Balance at December 31, 2018	$ 565
Additions and Milestone Billings	(1,018)
Revenue Recognized	1,131
Currency translation adjustments and other	(35)
Balance at December 31, 2019	643
Balance at December 31, 2018	458
Additions and Milestone Billings	809
Revenue Recognized	(782)
Currency translation adjustments and other	(58)
Balance at December 31, 2019	$ 427

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