Condensed Consolidated Statements of Stockholder Equity - USD ($) $ in Millions		Total		Total stockholders' equity	Common stock	Capital surplus	(Accumulated deficit) retained earnings	Treasury stock	Cumulative translation adjustment	Defined benefit postretirement plans	Cash flow hedging derivative	Non-controlling interest
Balance at beginning of period at Dec. 31, 2022		$ 3,508.4		$ 3,499.3	$ 0.0	$ 4,443.7	$ (764.1)	$ (0.3)	$ (170.3)	$ (58.1)	$ 48.4	$ 9.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(32.8)		(33.7)			(33.7)					0.9
Equity-based compensation plans		14.5		14.5		14.5
Dividends declared	[1]	(21.8)		(21.8)		(21.8)
Pension adjustments, net of tax benefit		(0.7)		(0.7)						(0.7)
Change in cumulative translation adjustment, net of tax benefit (expense)		6.4	[2]	6.3					6.3			0.1
Net investment hedge derivative, net of tax expense (benefit)		(2.4)	[3]	(2.4)					(2.4)
Cash flow hedge derivative, net of tax expense		(10.7)	[4]	(10.7)							(10.7)
Balance at end of period at Mar. 31, 2023		3,460.9		3,450.8	0.0	4,436.4	(797.8)	(0.3)	(166.4)	(58.8)	37.7	10.1
Balance at beginning of period at Dec. 31, 2023		3,431.6		3,419.1	0.0	4,429.2	(811.1)	(0.3)	(153.0)	(62.2)	16.5	12.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(21.9)		(23.2)			(23.2)					1.3
Equity-based compensation plans		7.6		7.6		7.6
Dividends declared	[1]	(21.9)		(21.9)		(21.9)
Pension adjustments, net of tax benefit		(0.4)		(0.4)						(0.4)
Change in cumulative translation adjustment, net of tax benefit (expense)		(35.5)	[2]	(35.4)					(35.4)			(0.1)
Net investment hedge derivative, net of tax expense (benefit)		4.9	[3]	4.9					4.9
Cash flow hedge derivative, net of tax expense		4.7	[4]	4.7							4.7
Balance at end of period at Mar. 31, 2024		$ 3,369.1		$ 3,355.4	$ 0.0	$ 4,414.9	$ (834.3)	$ (0.3)	$ (183.5)	$ (62.6)	$ 21.2	$ 13.7

[1] See Note 12 "Earnings (Loss) Per Share" for further discussion.

[2] Tax Expense (Benefit) of $0.6 million and $6.2 million for the three months ended March 31, 2024 and 2023, respectively.

[3] Tax Expense (Benefit) of $1.7 million and $(0.9) million for the three months ended March 31, 2024 and 2023, respectively.

[4] Tax Expense (Benefit) of $1.6 million and $(3.8) million for the three months ended March 31, 2024 and 2023, respectively.