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Hedging Activities - Additional Information (Detail) - Foreign Exchange Contract [Member] - Designated as Hedging Instrument [Member] $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Derivative [Line Items]
Percentage of effectiveness on net investment hedges	100.00%
Currency remeasuresment gains (losses)	$ 37.4
British-Pound-Denominated Loans [Member]
Derivative [Line Items]
Hedge against net investment in foreign subsidiaries	367.4
Euro Loan [Member]
Derivative [Line Items]
Hedge against net investment in foreign subsidiaries	$ 633.9

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- Definition

Percentage of effectiveness on net investment hedges.

+ References

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Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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- Definition

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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- Definition

Amount before tax, after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 35
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=118948100&loc=d3e30304-110892

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
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-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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