Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock		Additional Paid-In Capital		Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2023	[1]		1,249.0
Beginning balance at Dec. 31, 2023		$ 7,219.1	$ 0.1	[1]	$ 2,108.3	[1]	$ 5,114.0	$ (3.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,303.1					1,303.1
Other comprehensive income (loss), net of tax		(11.7)						(11.7)
Stock-based compensation		156.5			156.5	[1]
Issuance of common stock in connection with employee equity incentive plans (in shares)	[1]		11.2
Issuance of common stock in connection with employee equity incentive plans		34.5			34.5	[1]
Repurchase of common stock (in shares)	[1]		(3.4)
Repurchase of common stock		(234.7)					(234.7)
Tax withholding paid for net share settlement of equity awards (in shares)	[1]		(0.5)
Tax withholding paid for net share settlement of equity awards		(36.0)			(36.0)	[1]
Ending balance (in shares) at Jun. 30, 2024	[1]		1,256.3
Ending balance at Jun. 30, 2024		8,430.8	$ 0.1	[1]	2,263.3	[1]	6,182.4	(15.0)
Beginning balance (in shares) at Mar. 31, 2024	[1]		1,254.4
Beginning balance at Mar. 31, 2024		7,862.3	$ 0.1	[1]	2,185.1	[1]	5,689.0	(11.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		665.4					665.4
Other comprehensive income (loss), net of tax		(3.1)						(3.1)
Stock-based compensation		79.3			79.3	[1]
Issuance of common stock in connection with employee equity incentive plans (in shares)	[1]		4.5
Issuance of common stock in connection with employee equity incentive plans		9.4			9.4	[1]
Repurchase of common stock (in shares)	[1]		(2.5)
Repurchase of common stock		(172.0)					(172.0)
Tax withholding paid for net share settlement of equity awards (in shares)	[1]		(0.1)
Tax withholding paid for net share settlement of equity awards		(10.5)			(10.5)	[1]
Ending balance (in shares) at Jun. 30, 2024	[1]		1,256.3
Ending balance at Jun. 30, 2024		$ 8,430.8	$ 0.1	[1]	2,263.3	[1]	6,182.4	(15.0)
Beginning balance (in shares) at Dec. 31, 2024		1,261.3	1,261.3
Beginning balance at Dec. 31, 2024		$ 9,994.8	$ 0.1		2,465.4		7,542.5	(13.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,702.6					1,702.6
Other comprehensive income (loss), net of tax		17.0						17.0
Stock-based compensation		178.2			178.2
Issuance of common stock in connection with employee equity incentive plans (in shares)			6.9
Issuance of common stock in connection with employee equity incentive plans		$ 31.3			31.3
Repurchase of common stock (in shares)		(11.1)	(11.1)
Repurchase of common stock		$ (983.0)					(983.0)
Tax withholding paid for net share settlement of equity awards (in shares)			(0.3)
Tax withholding paid for net share settlement of equity awards		$ (39.3)			(39.3)
Ending balance (in shares) at Jun. 30, 2025		1,256.8	1,256.8
Ending balance at Jun. 30, 2025		$ 10,901.6	$ 0.1		2,635.6		8,262.1	3.8
Beginning balance (in shares) at Mar. 31, 2025			1,256.6
Beginning balance at Mar. 31, 2025		10,119.1	$ 0.1		2,551.7		7,569.2	(1.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		888.8					888.8
Other comprehensive income (loss), net of tax		5.7						5.7
Stock-based compensation		85.2			85.2
Issuance of common stock in connection with employee equity incentive plans (in shares)			2.6
Issuance of common stock in connection with employee equity incentive plans		$ 3.2			3.2
Repurchase of common stock (in shares)		(2.4)	(2.4)
Repurchase of common stock		$ (195.9)					(195.9)
Tax withholding paid for net share settlement of equity awards		$ (4.5)			(4.5)
Ending balance (in shares) at Jun. 30, 2025		1,256.8	1,256.8
Ending balance at Jun. 30, 2025		$ 10,901.6	$ 0.1		$ 2,635.6		$ 8,262.1	$ 3.8

[1] Prior period results have been adjusted to reflect the four-for-one stock split effected in December 2024. See Note 1, Organization and Summary of Accounting Policies, for details.