Senior Unsecured Notes - Additional Information (Detail) - 3.875% Senior Notes [Member] $ in Millions	Dec. 14, 2020 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,250
Senior unsecured notes, interest rate	3.875%
Senior unsecured notes, maturity year	2028

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant