CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Paid-in Capital	Retained Earnings	Other
Balance (in shares) at Dec. 31, 2022		49.5
Balance at Dec. 31, 2022	$ 1,901.3	$ 0.5	$ 703.5	$ 1,200.0	$ (2.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	44.0		44.0
Employee stock purchase plan (in shares)		0.6
Employee stock purchase plan	18.8	$ 0.0	18.8
Tax withholding on restricted stock vesting (in shares)		0.0
Tax withholding on restricted stock vesting	(18.3)		(18.3)
Stock repurchase and retirement of shares (in shares)		(3.4)
Stock repurchase and retirement of shares	(275.7)		(52.0)	(223.7)
Other	2.7				2.7
Net income	219.3			219.3
Balance (in shares) at Dec. 31, 2023		46.7
Balance at Dec. 31, 2023	1,892.1	$ 0.5	696.0	1,195.6	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	42.3		42.3
Employee stock purchase plan (in shares)		0.6
Employee stock purchase plan	17.2	$ 0.0	17.2
Tax withholding on restricted stock vesting (in shares)		0.0
Tax withholding on restricted stock vesting	(15.8)		(15.8)
Stock repurchase and retirement of shares (in shares)		(3.5)
Stock repurchase and retirement of shares	(329.3)	$ (0.1)	(55.5)	(273.7)
Other	(5.0)				(5.0)
Net income	175.2			175.2
Balance (in shares) at Dec. 31, 2024		43.8
Balance at Dec. 31, 2024	1,776.7	$ 0.4	684.2	1,097.1	(5.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	47.9		47.9
Employee stock purchase plan (in shares)		0.5
Employee stock purchase plan	14.2	$ 0.0	14.2
Tax withholding on restricted stock vesting (in shares)		0.0
Tax withholding on restricted stock vesting	(8.6)		(8.6)
Stock repurchase and retirement of shares (in shares)		(3.1)
Stock repurchase and retirement of shares	(171.8)	$ 0.0	(52.9)	(118.9)
Acquisition (in shares)		0.5
Acquisition	28.7		28.7
Other	3.4				3.4
Net income	113.5			113.5
Balance (in shares) at Dec. 31, 2025		41.7
Balance at Dec. 31, 2025	$ 1,804.0	$ 0.4	$ 713.5	$ 1,091.7	$ (1.6)