Financial Instruments and Fair Value Measurements - Foreign Currency Contracts Activity (Detail) - Forwards [Member] - Net Investment Hedges [Member] - Designated As Hedging Instrument [Member]	3 Months Ended
	Mar. 31, 2020 USD ($) Derivative	Mar. 31, 2019 USD ($) Derivative
Derivative [Line Items]
Notional amounts at January 1	$ 484,000,000	$ 687,000,000
New contracts	324,000,000	751,000,000
Matured, expired or settled contracts	(576,000,000)	(949,000,000)
Notional amounts at March 31	232,000,000	489,000,000
CAD
Derivative [Line Items]
Notional amounts at January 1	97,000,000	100,000,000
New contracts	0	0
Matured, expired or settled contracts	0	0
Notional amounts at March 31	$ 97,000,000	$ 100,000,000
Weighted average forward rate at March 31	1.32	1.28
Active contracts at March 31 | Derivative	2	2
BRL
Derivative [Line Items]
Notional amounts at January 1		$ 460,000,000
New contracts		489,000,000
Matured, expired or settled contracts		(949,000,000)
Notional amounts at March 31		$ 0
Weighted average forward rate at March 31		0.00
Active contracts at March 31 | Derivative		0
GBP
Derivative [Line Items]
Notional amounts at January 1	$ 387,000,000	$ 127,000,000
New contracts	324,000,000	262,000,000
Matured, expired or settled contracts	(576,000,000)	0
Notional amounts at March 31	$ 135,000,000	$ 389,000,000
Weighted average forward rate at March 31	1.35	1.30
Active contracts at March 31 | Derivative	1	6