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Debt - Summary of Outstanding Debt (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	May 11, 2023
Senior Unsecured Notes Series G [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	3.92%	3.92%
Senior Unsecured Notes Series H [Member]
Debt Instrument [Line Items]
Interest rate margin	1.25%	1.25%
Senior Unsecured Notes Series I [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	3.13%	3.13%
Senior Unsecured Notes Series K [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	3.44%	3.44%
Senior Unsecured Notes Series L [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	3.31%	3.31%
Senior Unsecured Notes Series M [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	3.53%	3.53%
Senior Unsecured Notes Series N [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	1.68%	1.68%
Senior Unsecured Notes Series O [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	2.25%	2.25%
Senior Unsecured Notes Series P [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	4.91%	4.91%	4.91%
Senior Unsecured Notes Series Q [Member]
Debt Instrument [Line Items]
Stated interest rate on debt instrument	4.91%	4.91%	4.91%

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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

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