Notes Payable - Components of Notes Payable (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 27, 2023	Jun. 16, 2021	Mar. 17, 2021
Series E senior notes [Member] | 2.35% Series E senior notes due in 2026 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	2.35%	2.35%		2.35%
Senior Notes, year of maturity	2026	2026
Series D senior notes [Member] | 2.57% Series D senior notes due in 2028 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	2.57%	2.57%			2.57%
Senior Notes, year of maturity	2028	2028
Series F Senior Notes [Member] | 6.25% Series F senior notes due in 2030 [Member]
Debt Instrument [Line Items]
Senior Notes, interest rate	6.25%	6.25%	6.25%
Senior Notes, year of maturity	2030	2030