Consolidated Statements of Shareholders’ Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interest
Beginning balance (in shares) at Dec. 31, 2022		63.9
Beginning balance at Dec. 31, 2022	$ 2,670.6	$ 6.4	$ 1,812.7	$ 1,366.4	$ (514.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(323.6)			(323.5)		$ (0.1)
Other Comprehensive Income, Net of Tax	41.5				41.5
Cash Dividends and Dividend Equivalents to Shareholders	(59.8)			(59.8)
Shares Issued Under Employee Stock Purchase Plan (in shares)		0.1
Shares Issued Under Employee Stock Purchase Plan	3.2		3.2
Equity-based Compensation Cost	30.0		30.0
Equity-based Awards, Net of Shares Exchanged (in shares)		0.1
Share Based Awards Net Of Shares Exchanged	(0.7)			(0.7)
Ending balance (in shares) at Sep. 30, 2023		64.1
Ending balance at Sep. 30, 2023	2,361.2	$ 6.4	1,845.9	982.4	(473.4)	(0.1)
Beginning balance (in shares) at Jun. 30, 2023		64.0
Beginning balance at Jun. 30, 2023	2,512.2	$ 6.4	1,837.6	1,149.0	(480.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(146.4)			(146.3)		(0.1)
Other Comprehensive Income, Net of Tax	7.4				7.4
Cash Dividends and Dividend Equivalents to Shareholders	(20.2)			(20.2)
Shares Issued Under Employee Stock Purchase Plan (in shares)		0.1
Shares Issued Under Employee Stock Purchase Plan	1.0		1.0
Equity-based Compensation Cost	7.3		7.3
Share Based Awards Net Of Shares Exchanged	(0.1)			(0.1)
Ending balance (in shares) at Sep. 30, 2023		64.1
Ending balance at Sep. 30, 2023	2,361.2	$ 6.4	1,845.9	982.4	(473.4)	(0.1)
Beginning balance (in shares) at Dec. 31, 2023		64.1
Beginning balance at Dec. 31, 2023	2,505.0	$ 6.4	1,845.3	1,014.3	(360.8)	(0.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	216.8			220.4		(3.6)
Other Comprehensive Income, Net of Tax	108.3				108.3
Cash Dividends and Dividend Equivalents to Shareholders	(60.1)			(60.1)
Repurchases of Common Stock (in shares)		0.4
Repurchases of Common Stock	25.0		11.8	13.2
Shares Issued Under Employee Stock Purchase Plan	2.9		2.9
Equity-based Compensation Cost	27.1		27.1
Equity-based Awards, Net of Shares Exchanged (in shares)		0.3
Share Based Awards Net Of Shares Exchanged	(5.5)		(5.5)
Other Changes in Non-Controlling Interest	0.9					0.9
Ending balance (in shares) at Sep. 30, 2024		64.0
Ending balance at Sep. 30, 2024	2,770.4	$ 6.4	1,858.0	1,161.4	(252.5)	(2.9)
Beginning balance (in shares) at Jun. 30, 2024		64.4
Beginning balance at Jun. 30, 2024	2,669.3	$ 6.4	1,860.9	1,121.2	(317.3)	(1.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	72.2			73.7		(1.5)
Other Comprehensive Income, Net of Tax	64.8				64.8
Cash Dividends and Dividend Equivalents to Shareholders	(20.3)			(20.3)
Repurchases of Common Stock (in shares)		0.4
Repurchases of Common Stock	25.0		11.8	13.2
Shares Issued Under Employee Stock Purchase Plan	0.9		0.9
Equity-based Compensation Cost	7.6		7.6
Share Based Awards Net Of Shares Exchanged	0.4		0.4
Other Changes in Non-Controlling Interest	0.5					0.5
Ending balance (in shares) at Sep. 30, 2024		64.0
Ending balance at Sep. 30, 2024	$ 2,770.4	$ 6.4	$ 1,858.0	$ 1,161.4	$ (252.5)	$ (2.9)