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U.K. Sale - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Jan. 19, 2021	Mar. 31, 2021
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gross proceeds from sale of business		$ 1,511,020
Discontinued Operations [Member] | U.K. Sales [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gross proceeds from sale of business	$ 1,525,000
Settlement of existing foreign currency hedging liabilities	85,000
Net proceeds from sale of business	$ 1,425,000
Cash from the balance sheet to reduce debt, amount		$ 1,640,000

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- Definition

Net ​proceeds ​from ​divestiture ​of businesses before cash retained by buyer.

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- Definition

Fair value of all liability derivatives designated as cash flow hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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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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- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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-Publisher FASB
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