Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Derivative Instruments And Hedging Activities - Additional Information (Detail)	1 Months Ended	9 Months Ended
	Jan. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 EUR (€)	Apr. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Derivative [Line Items]
Cumulative loss		$ 504,000,000			$ 439,000,000
Designated as Hedging Instrument
Derivative [Line Items]
Cumulative loss		122,000,000			(54,000,000)
Net Investment Hedging
Derivative [Line Items]
Cumulative loss		73,000,000			(54,000,000)
Net Investment Hedging \| Cross-currency swap
Derivative [Line Items]
Cumulative loss		40,000,000			(41,000,000)
2021 \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €			€ 265,000,000
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
2.75% 2017 Senior Notes, due 2021
Derivative [Line Items]
Notes payable, interest rate		2.75%	2.75%		2.75%
2.75% 2017 Senior Notes, due 2021 \| Net Investment Hedging \| Designated as Hedging Instrument \| Cross-currency swap
Derivative [Line Items]
Notional Amount \| €			€ 422,500,000
3.25% 2020 Senior Notes, due 2050
Derivative [Line Items]
Debt instrument, term		30 years
Notes payable, interest rate		3.25%	3.25%