Financial Instruments and Fair Value Measurements - Summary of Undesignated Foreign Currency Forwards Activity (Detail) - Forwards [Member] - Undesignated Derivatives [Member]	6 Months Ended
	Jun. 30, 2020 USD ($) Derivative	Jun. 30, 2019 USD ($) Derivative
Derivative [Line Items]
Notional amounts at January 1	$ 1,107,000,000	$ 669,000,000
New contracts	1,207,000,000	1,386,000,000
Matured, expired or settled contracts	(1,461,000,000)	(1,224,000,000)
Notional amounts at June 30	853,000,000	831,000,000
CAD
Derivative [Line Items]
Notional amounts at January 1	120,000,000	55,000,000
New contracts	16,000,000	144,000,000
Matured, expired or settled contracts	(22,000,000)	(116,000,000)
Notional amounts at June 30	$ 114,000,000	$ 83,000,000
Weighted average forward rate at June 30	1.33	1.31
Active contracts at June 30 | Derivative	42	30
EUR
Derivative [Line Items]
Notional amounts at January 1	$ 581,000,000	$ 314,000,000
New contracts	809,000,000	86,000,000
Matured, expired or settled contracts	(1,071,000,000)	(62,000,000)
Notional amounts at June 30	$ 319,000,000	$ 338,000,000
Weighted average forward rate at June 30	1.16	1.20
Active contracts at June 30 | Derivative	48	34
GBP
Derivative [Line Items]
Notional amounts at January 1	$ 178,000,000	$ 118,000,000
New contracts	294,000,000	625,000,000
Matured, expired or settled contracts	(285,000,000)	(510,000,000)
Notional amounts at June 30	$ 187,000,000	$ 233,000,000
Weighted average forward rate at June 30	1.31	1.28
Active contracts at June 30 | Derivative	54	30
JPY
Derivative [Line Items]
Notional amounts at January 1	$ 182,000,000	$ 177,000,000
New contracts	60,000,000	37,000,000
Matured, expired or settled contracts	(50,000,000)	(37,000,000)
Notional amounts at June 30	$ 192,000,000	$ 177,000,000
Weighted average forward rate at June 30	102.86	104.13
Active contracts at June 30 | Derivative	45	34
SEK
Derivative [Line Items]
Notional amounts at January 1	$ 31,000,000
New contracts	9,000,000
Matured, expired or settled contracts	(6,000,000)
Notional amounts at June 30	$ 34,000,000
Weighted average forward rate at June 30	9.40
Active contracts at June 30 | Derivative	30
Other
Derivative [Line Items]
Notional amounts at January 1	$ 15,000,000
New contracts	19,000,000
Matured, expired or settled contracts	(27,000,000)
Notional amounts at June 30	$ 7,000,000
BRL
Derivative [Line Items]
Notional amounts at January 1		$ 5,000,000
New contracts		489,000,000
Matured, expired or settled contracts		(494,000,000)
Notional amounts at June 30		$ 0
Active contracts at June 30 | Derivative		0
MXN
Derivative [Line Items]
Notional amounts at January 1		$ 0
New contracts		5,000,000
Matured, expired or settled contracts		(5,000,000)
Notional amounts at June 30		$ 0
Active contracts at June 30 | Derivative		0