Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2022	$ 3,667.1	$ 0.9	$ 581.8	$ 3,186.8	$ (102.4)
Beginning Balance (in shares) at Dec. 31, 2022		89,695,000
Common stock repurchases and retirements	(41.5)		(2.5)	(39.0)
Common stock repurchases and retirements (in shares)		(286,000)
Common stock withheld and retired to cover taxes on vested stock awards	(15.7)		(1.1)	(14.6)
Common stock withheld and retired to cover taxes on vested stock awards (in shares)		(121,000)
Common stock dividends declared	(451.2)			(451.2)
Share-based compensation and other	41.9		41.9
Share-based compensation expense and other (in shares)		337,000
Comprehensive income	796.7			765.2	31.5
Ending Balance at Dec. 31, 2023	3,997.3	$ 0.9	620.1	3,447.2	(70.9)
Ending Balance (in shares) at Dec. 31, 2023		89,625,000
Common stock withheld and retired to cover taxes on vested stock awards	(25.7)		(1.3)	(24.4)
Common stock withheld and retired to cover taxes on vested stock awards (in shares)		(143,000)
Common stock dividends declared	(451.3)			(451.3)
Share-based compensation and other	51.1		51.0	0.1
Share-based compensation expense and other (in shares)		320,000
Comprehensive income	832.6			805.1	27.5
Ending Balance at Dec. 31, 2024	4,404.0	$ 0.9	669.8	3,776.7	(43.4)
Ending Balance (in shares) at Dec. 31, 2024		89,802,000
Common stock repurchases and retirements	(153.0)		(7.4)	(145.6)
Common stock repurchases and retirements (in shares)		(761,000)
Common stock withheld and retired to cover taxes on vested stock awards	(23.6)		(1.2)	(22.4)
Common stock withheld and retired to cover taxes on vested stock awards (in shares)		(118,000)
Common stock dividends declared	(451.9)			(451.9)
Share-based compensation and other	46.6		46.5	0.1
Share-based compensation expense and other (in shares)		291,000
Comprehensive income	775.9			774.1	1.8
Ending Balance at Dec. 31, 2025	$ 4,598.0	$ 0.9	$ 707.7	$ 3,931.0	$ (41.6)
Ending Balance (in shares) at Dec. 31, 2025		89,214,000