Condensed Consolidated Statements of Stockholder Equity - USD ($) $ in Millions		Total		Total stockholder 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, 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)		(19.4)		(25.1)			(25.1)					5.7
Equity-based compensation plans		38.7		38.7		38.7
Dividends declared	[1]	(21.8)		(21.8)		(21.8)
Pension adjustments, net of tax benefit		(0.2)		(0.2)						(0.2)
Change in cumulative translation adjustment, net of tax benefit (expense)		(220.0)	[2]	(212.8)					(212.8)			(7.2)
Net investment hedge derivative, net of tax expense (benefit)		21.9	[3]	21.9					21.9
Cash flow hedge derivative, net of tax expense		43.4	[4]	43.4							43.4
Payment to non-controlling interest		(0.3)										(0.3)
Balance at end of period at Sep. 30, 2022		3,587.6		3,525.3	0.0	4,517.3	(786.9)	(0.3)	(243.5)	(12.1)	50.8	62.3
Balance at beginning of period at Jun. 30, 2022		3,645.7		3,582.1	0.0	4,521.6	(794.9)	(0.3)	(170.5)	(12.1)	38.3	63.6
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		10.4		8.0			8.0					2.4
Equity-based compensation plans		17.5		17.5		17.5
Dividends declared	[1]	(21.8)		(21.8)		(21.8)
Change in cumulative translation adjustment, net of tax benefit (expense)		(93.1)	[2]	(89.4)					(89.4)			(3.7)
Net investment hedge derivative, net of tax expense (benefit)		16.4	[3]	16.4					16.4
Cash flow hedge derivative, net of tax expense		12.5	[4]	12.5							12.5
Balance at end of period at Sep. 30, 2022		3,587.6		3,525.3	0.0	4,517.3	(786.9)	(0.3)	(243.5)	(12.1)	50.8	62.3
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)		(46.3)		(48.7)			(48.7)					2.4
Equity-based compensation plans		55.8		55.8		55.8
Dividends declared	[1]	(65.6)		(65.6)		(65.6)
Pension adjustments, net of tax benefit		(2.0)		(2.0)						(2.0)
Change in cumulative translation adjustment, net of tax benefit (expense)		(33.7)	[2]	(33.6)					(33.6)			(0.1)
Net investment hedge derivative, net of tax expense (benefit)		3.1	[3]	3.1					3.1
Cash flow hedge derivative, net of tax expense		4.0	[4]	4.0							4.0
Balance at end of period at Sep. 30, 2023		3,423.7		3,412.3	0.0	4,433.9	(812.8)	(0.3)	(200.8)	(60.1)	52.4	11.4
Balance at beginning of period at Jun. 30, 2023		3,449.6		3,438.9	0.0	4,438.6	(817.2)	(0.3)	(178.9)	(59.4)	56.1	10.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		5.3		4.4			4.4					0.9
Equity-based compensation plans		17.2		17.2		17.2
Dividends declared	[1]	(21.9)		(21.9)		(21.9)
Pension adjustments, net of tax benefit		(0.7)		(0.7)						(0.7)
Change in cumulative translation adjustment, net of tax benefit (expense)		(31.9)	[2]	(31.7)					(31.7)			(0.2)
Net investment hedge derivative, net of tax expense (benefit)		9.8	[3]	9.8					9.8
Cash flow hedge derivative, net of tax expense		(3.7)	[4]	(3.7)							(3.7)
Balance at end of period at Sep. 30, 2023		$ 3,423.7		$ 3,412.3	$ 0.0	$ 4,433.9	$ (812.8)	$ (0.3)	$ (200.8)	$ (60.1)	$ 52.4	$ 11.4

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

[2] Tax Expense (Benefit) of $(0.2) million and $(4.0) million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $6.9 million and $(6.9) million for the nine months ended September 30, 2023 and 2022, respectively.

[3] Tax Expense (Benefit) of $0.1 million and $6.0 million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $(2.3) million and $8.0 million for the nine months ended September 30, 2023 and 2022, respectively.

[4] Tax Expense (Benefit) of $(2.2) million and $4.5 million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $0.5 million and $15.9 million for the nine months ended September 30, 2023 and 2022, respectively.