Restructuring - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($) Employee	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 80	$ 22	$ 63
T19 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 55
Restructuring and Related Cost, Expected Number of Positions Eliminated | Employee	540
Restructuring and Related Cost, Number of Positions Eliminated | Employee	440
Payments for Restructuring	$ (51)
Brazil Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 7
Restructuring and Related Cost, Number of Positions Eliminated | Employee	195
Payments for Restructuring	$ (6)
Restructuring and Related Cost, Expected Cost Remaining	$ 8