Senior Notes - Additional Information (Detail) - 4.625% Senior Notes Due 2022 [Member] $ in Millions	1 Months Ended
Mar. 31, 2020 USD ($)
Debt Instrument [Line Items]
Repayment of debt	$ 200.0
Debt instrument, interest rate	4.625%
Debt instrument maturity year	2022
Other (Expense) Income, Net [Member]
Debt Instrument [Line Items]
Payment of make-whole amount on debt	$ 16.6

Debt instrument maturity year.

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- Definition

Redemption senior unsecured notes make whole amount.

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ References

No definition available.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585

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