Equity-Based Compensation - PSUs (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Feb. 28, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Performance Share Units [Member]
Equity-Based Compensation
Vesting period		3 years	3 years
Potential payout (as a percent)		100.00%
Shares issued under the plan	322,000
Unvested, Units, beginning of year		864,000
Granted, Units		316,000
Vested, Units	(489,000)	(279,000)
Forfeited, Units		(20,000)
Unvested, Units, end of year		881,000	864,000
Unvested, Weighted Average Per Share Fair Value, beginning of year		$ 147.00
Granted, Weighted Average Per Share Fair Value		163.80
Vested, Weighted Average Per Share Fair Value		153.34
Forfeited, Weighted Average Per Share Fair Value		157.83
Unvested, Weighted Average Per Share Fair Value, end of year		$ 150.77	$ 147.00
Total fair market value of vested awards		$ 74	$ 91	$ 74
Total Shareholder Return Award [Member]
Equity-Based Compensation
Actual payout (as a percent)			200.00%
Cash Flow Award [Member]
Equity-Based Compensation
Actual payout (as a percent)			150.21%
Deferred Units [Member]
Equity-Based Compensation
Share-based awards outstanding (in shares)		182,000
Minimum [Member] | Performance Share Units [Member]
Equity-Based Compensation
Potential payout (as a percent)		0.00%
Maximum [Member] | Performance Share Units [Member]
Equity-Based Compensation
Potential payout (as a percent)		200.00%