Shareholders' Equity - Summary of Changes in Shareholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,991,666	$ 3,042,288	$ 3,002,378	$ 3,103,074
Net income	411,393	332,081	1,270,807	902,138
Purchase of common stock for treasury	(368,490)	(398,489)	(1,384,193)	(1,152,855)
Equity-based compensation	26,686	15,009	58,441	42,859
Proceeds from Options exercised	23,584	26,162	137,406	121,835
Ending Balance	$ 3,084,839	$ 3,017,051	$ 3,084,839	$ 3,017,051
Common stock repurchased (in shares)	88,016	79,620	295,148	244,595
Reissued shares during the period, shares (in shares)	15,840	13,116	59,559	61,704
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 206	$ 206	$ 206	$ 206
Ending Balance	206	206	206	206
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	2,498,123	2,314,564	2,378,191	2,214,426
Equity-based compensation	26,686	15,009	58,441	42,859
Proceeds from Options exercised	23,584	26,162	137,406	121,835
Treasury stock issued upon Option exercise	(9,581)	(6,735)	(35,226)	(30,120)
Ending Balance	2,538,812	2,349,000	2,538,812	2,349,000
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	10,907,253	9,381,177	10,047,839	8,811,120
Net income	411,393	332,081	1,270,807	902,138
Ending Balance	11,318,646	9,713,258	11,318,646	9,713,258
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(10,413,916)	(8,653,659)	(9,423,858)	(7,922,678)
Purchase of common stock for treasury	(368,490)	(398,489)	(1,384,193)	(1,152,855)
Treasury stock issued upon Option exercise	9,581	6,735	35,226	30,120
Ending Balance	(10,772,825)	(9,045,413)	(10,772,825)	(9,045,413)
Deferred Compensation Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(16,710)	(16,710)	(16,710)	(16,710)
Ending Balance	(16,710)	(16,710)	(16,710)	(16,710)
Deferred Compensation Liability
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	16,710	16,710	16,710	16,710
Ending Balance	$ 16,710	$ 16,710	$ 16,710	$ 16,710