Consolidated Statements of Stockholders' (Deficit) Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Treasury Stock, Shares						47,300,000
Beginning balance at Dec. 31, 2018	$ (149.6)	$ 0.9	$ 1,078.8	$ 1,855.0	$ (188.8)	$ (2,895.5)
Net income	69.3			69.3
Dividends, Common Stock, Cash	(25.3)			(25.3)
Change in cash flow hedges, net of tax expense	6.2				6.2
Foreign currency translation adjustments	2.6				2.6
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(0.2)				(0.2)
Stock-based compensation expense	5.2
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	5.2		5.2
Stock Issued During Period, Value, Treasury Stock Reissued	0.8		$ (4.6)			$ 5.4
Stock Issued During Period, Shares, Treasury Stock Reissued						(200,000)
Treasury Stock, Shares, Acquired			0			500,000
Treasury Stock, Value, Acquired, Cost Method	(113.5)					$ (113.5)
Ending balance at Mar. 31, 2019	(204.8)	0.9	$ 1,079.4	1,898.7	(180.2)	$ (3,003.6)
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (0.3)			(0.3)
Treasury Stock, Shares						47,600,000
Treasury Stock, Shares	48,575,901					48,600,000
Beginning balance at Dec. 31, 2019	$ (170.2)	0.9	1,093.5	2,148.7	(103.8)	$ (3,309.5)
Net income	12.9			12.9
Dividends, Common Stock, Cash	(29.4)			(29.4)
Change in cash flow hedges, net of tax expense	(9.6)				(9.6)
Foreign currency translation adjustments	(20.3)				(20.3)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0.6				0.6
Stock-based compensation expense	3.7
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	3.7		3.7
Stock Issued During Period, Value, Treasury Stock Reissued	0.8		(2.0)			$ 2.8
Stock Issued During Period, Shares, Treasury Stock Reissued						(100,000)
Treasury Stock, Shares, Acquired						400,000
Treasury Stock, Value, Acquired, Cost Method	(105.5)					$ (105.5)
Ending balance at Mar. 31, 2020	(318.3)	$ 0.9	$ 1,095.2	2,130.9	$ (133.1)	$ (3,412.2)
Cumulative Effect of New Accounting Principle in Period of Adoption	$ (1.3)			$ (1.3)
Treasury Stock, Shares	48,918,495					48,900,000