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Derivative Instruments And Hedging Activities - Additional Information (Detail)		1 Months Ended
	May 20, 2020	Jan. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2020 EUR (€)	Apr. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Derivative [Line Items]
Cumulative loss			$ 542,000,000			$ 439,000,000
Designated as Hedging Instrument
Derivative [Line Items]
Cumulative loss			(21,000,000)			(54,000,000)
Net Investment Hedging
Derivative [Line Items]
Cumulative loss			(70,000,000)			(54,000,000)
Net Investment Hedging \| Cross-currency swap
Derivative [Line Items]
Cumulative loss			(58,000,000)			(41,000,000)
2021 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				€ 687,000,000
2022 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				438,000,000
2023 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				442,000,000
2024 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				443,000,000
2026 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				€ 450,000,000
Cash Flow Hedging
Derivative [Line Items]
Cumulative loss			49,000,000			0
Cash Flow Hedging \| Cross-currency swap
Derivative [Line Items]
Cumulative loss			(2,000,000)			(2,000,000)
Cash Flow Hedging \| Forward Contracts
Derivative [Line Items]
Cumulative loss					$ 68,000,000
Cash Flow Hedging \| Interest rate contract
Derivative [Line Items]
Cumulative loss			$ 51,000,000			$ 2,000,000
Cash Flow Hedging \| Designated as Hedging Instrument \| Forward Contracts
Derivative [Line Items]
Notional Amount		$ 300,000,000
Forward interest rate		2.0103%
Debt instrument, term		30 years
1.75% 2015 Senior Notes, due 2027
Derivative [Line Items]
Notes payable, interest rate			1.75%	1.75%		1.75%
1.75% 2015 Senior Notes, due 2027 \| Net Investment Hedging \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				€ 500,000,000
2019 Senior Notes Due 2030 \| Net Investment Hedging \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €				€ 750,000,000
3.25% 2020 Senior Notes, due 2050
Derivative [Line Items]
Debt instrument, term	30 years
Notes payable, interest rate	3.25%		3.25%	3.25%