Shareholders' Equity - Summary of Changes in Shareholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 3,845,131	$ 4,133,908	$ 4,210,072	$ 4,364,725
Net income	342,688	429,323	976,001	1,224,496
Purchase of common stock for treasury	(278,094)	(359,520)	(1,342,349)	(1,503,216)
Equity-based compensation	17,356	19,223	53,695	54,465
Proceeds from Options exercised	39,681	48,314	69,343	130,778
Ending Balance	$ 3,966,762	$ 4,271,248	$ 3,966,762	$ 4,271,248
Common stock repurchased (in shares)	35,224	42,629	178,178	192,655
Reissued shares during the period, shares (in shares)	12,908	17,153	27,433	61,939
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	3,085,904	2,935,053	3,031,637	2,848,528
Equity-based compensation	17,356	19,223	53,695	54,465
Proceeds from Options exercised	39,681	48,314	69,343	130,778
Treasury stock issued upon Option exercise and RSU vesting	(10,961)	(12,814)	(22,695)	(43,995)
Ending Balance	3,131,980	2,989,776	3,131,980	2,989,776
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	15,680,266	14,160,198	15,046,953	13,365,025
Net income	342,688	429,323	976,001	1,224,496
Ending Balance	16,022,954	14,589,521	16,022,954	14,589,521
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(14,921,245)	(12,961,549)	(13,868,724)	(11,849,034)
Purchase of common stock for treasury	(278,094)	(359,520)	(1,342,349)	(1,503,216)
Treasury stock issued upon Option exercise and RSU vesting	10,961	12,814	22,695	43,995
Ending Balance	(15,188,378)	(13,308,255)	(15,188,378)	(13,308,255)
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