Summary of Long Term Debt (Parenthetical ) (Detail)	6 Months Ended
Jun. 30, 2021
3.95% Senior Notes
Debt Instrument [Line Items]
Debt interest rate	3.95%
5.15% Senior Notes
Debt Instrument [Line Items]
Debt interest rate	5.15%
Term Loan Agreement
Debt Instrument [Line Items]
Maturity date	2022-06
Term Loan Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility description	Our revolving credit facility matures in two increments in 2024 and 2025.

- Definition

Identification of the lender and information about a contractual promise to repay a short-term or long-term obligation, which includes borrowings under lines of credit, notes payable, commercial paper, bonds payable, debentures, and other contractual obligations for payment. This may include rationale for entering into the arrangement, significant terms of the arrangement, which may include amount, repayment terms, priority, collateral required, debt covenants, borrowing capacity, call features, participation rights, conversion provisions, sinking-fund requirements, voting rights, basis for conversion if convertible and remarketing provisions. The description may be provided for individual debt instruments, rational groupings of debt instruments, or by debt in total.

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