Shareholders' Equity - Summary of Changes in Shareholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 4,153,263	$ 2,991,666	$ 3,506,849	$ 3,002,378
Net income	433,157	411,393	1,181,536	1,270,807
Purchase of common stock for treasury	(485,328)	(368,490)	(796,453)	(1,384,193)
Equity-based compensation	26,052	26,686	73,488	58,441
Proceeds from Options exercised	45,439	23,584	207,163	137,406
Ending Balance	$ 4,172,583	$ 3,084,839	$ 4,172,583	$ 3,084,839
Common stock repurchased (in shares)	78,750	88,016	134,751	295,148
Reissued shares during the period, shares (in shares)	28,189	15,840	125,745	59,559
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	2,747,687	2,498,123	2,600,014	2,378,191
Equity-based compensation	26,052	26,686	73,488	58,441
Proceeds from Options exercised	45,439	23,584	207,163	137,406
Treasury stock issued upon Option exercise and RSU vesting	(18,151)	(9,581)	(79,638)	(35,226)
Ending Balance	2,801,027	2,538,812	2,801,027	2,538,812
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	12,521,793	10,907,253	11,773,414	10,047,839
Net income	433,157	411,393	1,181,536	1,270,807
Ending Balance	12,954,950	11,318,646	12,954,950	11,318,646
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(11,116,423)	(10,413,916)	(10,866,785)	(9,423,858)
Purchase of common stock for treasury	(485,328)	(368,490)	(796,453)	(1,384,193)
Treasury stock issued upon Option exercise and RSU vesting	18,151	9,581	79,638	35,226
Ending Balance	(11,583,600)	(10,772,825)	(11,583,600)	(10,772,825)
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