Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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-Publisher FASB
-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Derivatives - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
Derivatives - Additional Information (Detail) - USD ($)	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within twelve months			$ 10,000,000
Other Expense, Net [Member]
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, expense (income), net	$ 8,100,000	$ 11,100,000	12,700,000	$ 45,300,000
4.70% Senior Notes Due 2020 [Member]
Derivative [Line Items]
Debt Instrument, face amount	$ 277,000,000		$ 277,000,000
Debt Instrument, interest rate, stated percentage	4.70%		4.70%		4.70%
4.00% Senior Notes Due 2024 [Member]
Derivative [Line Items]
Debt Instrument, face amount	$ 250,000,000		$ 250,000,000
Debt Instrument, interest rate, stated percentage	4.00%		4.00%		4.00%
Interest Rate Swaps [Member]
Derivative [Line Items]
Derivative, notional amount	$ 527,000,000		$ 527,000,000
Foreign Currency Contracts [Member]
Derivative [Line Items]
Derivative, notional amount	501,000,000		501,000,000
Foreign Currency Contracts [Member] \| Derivatives Not Designated as Effective Hedges [Member]
Derivative [Line Items]
Derivative, notional amount	$ 723,000,000		$ 723,000,000