Equity-Based Compensation - Stock Options (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity-Based Compensation
Exercisable shares, end of year	1,819,000
Exercisable, Weighted Average Per Share Exercise Price	$ 96.67
Exercise of common stock options	$ 44	$ 44	$ 66
Employee Stock Option
Equity-Based Compensation
Term of awards	10 years
Outstanding shares, beginning of year	2,923,000
Granted, shares	437,000
Exercised, shares	(597,000)	(675,000)	(962,000)
Forfeited or expired, shares	(34,000)
Outstanding shares, end of year	2,729,000	2,923,000
Exercisable shares, end of year	1,819,000
Outstanding, Weighted Average Per Share Fair Value, beginning of year	$ 101.22
Granted, Weighted Average Per Share Fair Value	150.12
Exercised, Weighted Average Per Share Fair Value	89.32
Forfeited or expired, Weighted Average Per Share Fair Value	136.56
Outstanding, Weighted Average Per Share Fair Value, end of year	111.22	$ 101.22
Exercisable, Weighted Average Per Share Exercise Price	$ 96.67
Weighted average remaining contractual term of stock options outstanding	6 years
Aggregate intrinsic value of stock options outstanding based on the market value of company's common stock	$ 185
Aggregate intrinsic value of stock options exercisable based on the market value of company's common stock	150
Exercise of common stock options	44	$ 44	$ 66
Aggregate intrinsic value of stock options exercised	$ 44	$ 51	$ 66
Employee Stock Option | 10b5-1 Plan [Member]
Equity-Based Compensation
Exercised, shares	(83,000)
Equity compensation tax payments (in shares)	70,000