Financial Instruments and Fair Value Measurements - Summary of Undesignated Foreign Currency Forwards Activity (Detail) - Forwards [Member] - Undesignated Derivatives [Member]	9 Months Ended
	Sep. 30, 2020 USD ($) Derivative	Sep. 30, 2019 USD ($) Derivative
Derivative [Line Items]
Notional amounts at January 1	$ 1,107,000,000	$ 669,000,000
New contracts	1,292,000,000	2,247,000,000
Matured, expired or settled contracts	(1,548,000,000)	(1,950,000,000)
Notional amounts at September 30	851,000,000	966,000,000
CAD
Derivative [Line Items]
Notional amounts at January 1	120,000,000	55,000,000
New contracts	29,000,000	150,000,000
Matured, expired or settled contracts	(32,000,000)	(126,000,000)
Notional amounts at September 30	$ 117,000,000	$ 79,000,000
Weighted average forward rate at September 30	1.34	1.31
Active contracts at September 30 | Derivative	48	29
EUR
Derivative [Line Items]
Notional amounts at January 1	$ 581,000,000	$ 314,000,000
New contracts	845,000,000	470,000,000
Matured, expired or settled contracts	(1,099,000,000)	(228,000,000)
Notional amounts at September 30	$ 327,000,000	$ 556,000,000
Weighted average forward rate at September 30	1.17	1.15
Active contracts at September 30 | Derivative	55	46
GBP
Derivative [Line Items]
Notional amounts at January 1	$ 178,000,000	$ 118,000,000
New contracts	294,000,000	1,045,000,000
Matured, expired or settled contracts	(311,000,000)	(1,031,000,000)
Notional amounts at September 30	$ 161,000,000	$ 132,000,000
Weighted average forward rate at September 30	1.31	1.32
Active contracts at September 30 | Derivative	47	38
JPY
Derivative [Line Items]
Notional amounts at January 1	$ 182,000,000	$ 177,000,000
New contracts	82,000,000	54,000,000
Matured, expired or settled contracts	(66,000,000)	(60,000,000)
Notional amounts at September 30	$ 198,000,000	$ 171,000,000
Weighted average forward rate at September 30	102.80	103.80
Active contracts at September 30 | Derivative	48	38
SEK
Derivative [Line Items]
Notional amounts at January 1	$ 31,000,000	$ 0
New contracts	10,000,000	26,000,000
Matured, expired or settled contracts	(9,000,000)	0
Notional amounts at September 30	$ 32,000,000	$ 26,000,000
Weighted average forward rate at September 30	9.35	9.39
Active contracts at September 30 | Derivative	31	12
Other
Derivative [Line Items]
Notional amounts at January 1	$ 15,000,000
New contracts	32,000,000
Matured, expired or settled contracts	(31,000,000)
Notional amounts at September 30	$ 16,000,000
BRL
Derivative [Line Items]
Notional amounts at January 1		$ 5,000,000
New contracts		493,000,000
Matured, expired or settled contracts		(496,000,000)
Notional amounts at September 30		$ 2,000,000
Weighted average forward rate at September 30		3.82
Active contracts at September 30 | Derivative		1
MXN
Derivative [Line Items]
Notional amounts at January 1		$ 0
New contracts		9,000,000
Matured, expired or settled contracts		(9,000,000)
Notional amounts at September 30		$ 0
Active contracts at September 30 | Derivative		0