Debt - Credit Facility Amendment - Additional Information (Detail) $ in Millions	Jan. 15, 2021 USD ($)
Minimum [Member]
Debt Instrument [Line Items]
Commitment fee	0.125%
Maximum [Member]
Debt Instrument [Line Items]
Commitment fee	0.30%
Unsecured Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Amount of senior unsecured debt	$ 1,300
Debt instrument maturity date	Feb. 01, 2024
Term Loan [Member]
Debt Instrument [Line Items]
Amount of senior unsecured debt	$ 200
Debt instrument maturity date	Feb. 01, 2026
Alternate Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin for term loan	0.00%
Applicable margin for revolving loans	0.00%
Alternate Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable margin for term loan	0.85%
Applicable margin for revolving loans	0.55%
Eurodollar Loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Applicable margin for term loan	0.85%
Applicable margin for revolving loans	0.825%
Eurodollar Loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Applicable margin for term loan	1.85%
Applicable margin for revolving loans	1.55%