Equity-Based Compensation - Options (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity-Based Compensation
Exercisable shares, end of year	1,596,000
Exercisable, Weighted Average Per Share Exercise Price	$ 106.79
Exercise of common stock options	$ 53	$ 44	$ 44
Employee Stock Option
Equity-Based Compensation
Term of awards	10 years
Outstanding shares, beginning of year	2,729,000
Granted, shares	377,000
Exercised, shares	(693,000)	(597,000)	(675,000)
Forfeited or expired, shares	(38,000)
Outstanding shares, end of year	2,375,000	2,729,000
Exercisable shares, end of year	1,596,000
Outstanding, Weighted Average Per Share Fair Value, beginning of year	$ 111.22
Granted, Weighted Average Per Share Fair Value	204.76
Exercised, Weighted Average Per Share Fair Value	98.54
Forfeited or expired, Weighted Average Per Share Fair Value	149.97
Outstanding, Weighted Average Per Share Fair Value, end of year	129.15	$ 111.22
Exercisable, Weighted Average Per Share Exercise Price	$ 106.79
Weighted average remaining contractual term of stock options outstanding	5 years 10 months 24 days
Aggregate intrinsic value of stock options outstanding based on the market value of company's common stock	$ 174
Aggregate intrinsic value of stock options exercisable based on the market value of company's common stock	152
Exercise of common stock options	53	$ 44	$ 44
Aggregate intrinsic value of stock options exercised	$ 75	$ 44	$ 51
Employee Stock Option | 10b5-1 Plan [Member]
Equity-Based Compensation
Exercised, shares	(118,000)
Equity compensation tax payments (in shares)	89,000