Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Millions		Total		Total stockholders' equity (deficit)	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, 2021		$ 3,745.3		$ 3,681.2	$ 0.0	$ 4,500.4	$ (761.8)	$ (0.3)	$ (52.6)	$ (11.9)	$ 7.4	$ 64.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		4.1		(2.3)			(2.3)					6.4
Purchase of non-controlling interest	[1]	(116.2)		(73.8)		(73.8)						(42.4)
Reclassification of cumulative translation adjustment related to the purchase of non-controlling interest		0.0		(3.8)					(3.8)			3.8
Equity-based compensation plans		60.7		60.7		60.7
Dividends declared	[2]	(43.6)		(43.6)		(43.6)
Pension adjustments, net of tax benefit		(46.2)		(46.2)						(46.2)
Change in cumulative translation adjustment, net of tax (benefit) expense		(124.6)	[3]	(115.9)					(115.9)			(8.7)
Net investment hedge derivative, net of tax benefit (expense)		2.0	[4]	2.0					2.0
Cash flow hedge derivative, net of tax expense (benefit)		41.0	[5]	41.0							41.0
Payment to non-controlling interest		(14.1)										(14.1)
Balance at end 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)		(43.7)		(47.0)			(47.0)					3.3
Equity-based compensation plans		73.0		73.0		73.0
Dividends declared	[2]	(87.5)		(87.5)		(87.5)
Pension adjustments, net of tax benefit		(4.1)		(4.1)						(4.1)
Change in cumulative translation adjustment, net of tax (benefit) expense		29.9	[3]	29.8					29.8			0.1
Net investment hedge derivative, net of tax benefit (expense)		(12.5)	[4]	(12.5)					(12.5)
Cash flow hedge derivative, net of tax expense (benefit)		(31.9)	[5]	(31.9)							(31.9)
Balance at end 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)		(24.5)		(28.6)			(28.6)					4.1
Equity-based compensation plans		53.0		53.0		53.0
Dividends declared	[2]	(88.2)		(88.2)		(88.2)
Shares acquired under stock repurchase program		(9.4)		(9.4)				(9.4)
Pension adjustments, net of tax benefit		(0.4)		(0.4)						(0.4)
Change in cumulative translation adjustment, net of tax (benefit) expense		(76.9)	[3]	(76.2)					(76.2)			(0.7)
Net investment hedge derivative, net of tax benefit (expense)		17.8	[4]	17.8					17.8
Cash flow hedge derivative, net of tax expense (benefit)		11.4	[5]	11.4							11.4
Balance at end of period at Dec. 31, 2024		$ 3,314.4		$ 3,298.5	$ 0.0	$ 4,394.0	$ (839.7)	$ (9.7)	$ (211.4)	$ (62.6)	$ 27.9	$ 15.9

[1] See Note 11 "Supplemental Financial Data" for further discussion.

[2] See Note 15 "Stockholders' Equity" for further discussion.

[3] Tax Expense (Benefit) of $(0.5) million, $7.9 million and $(9.9) million, for the years ended December 31, 2024, 2023 and 2022, respectively.

[4] Tax Expense (Benefit) of $6.4 million, $(4.5) million and $0.9 million for the years ended December 31, 2024, 2023 and 2022, respectively.

[5] Tax Expense (Benefit) of $4.0 million, $(11.5) million and $14.6 million, for the years ended December 31, 2024, 2023 and 2022, respectively.