Components of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ (53.6)		$ (36.4)		$ (63.8)
Adoption of new accounting pronouncements (Note 1)			(0.6)
Other comprehensive income before reclassifications	(27.7)		(18.4)		15.4
Amounts reclassified to consolidated statement of income	8.0	[1]	(0.0)	[2]	14.5	[1],[3]
Tax benefit (expense)	6.6		1.8		(2.5)
Other comprehensive income (loss)	(13.1)		(16.6)		27.4
Ending balance	(66.7)		(53.6)		(36.4)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(42.5)		(31.6)		(50.0)
Adoption of new accounting pronouncements (Note 1)			(0.3)
Other comprehensive income before reclassifications	3.8		(10.6)		20.0
Amounts reclassified to consolidated statement of income	1.9	[1]	(0.0)	[2]	(0.0)	[1],[3]
Tax benefit (expense)	(0.0)		(0.0)		(1.6)
Other comprehensive income (loss)	5.7		(10.6)		18.4
Ending balance	(36.8)		(42.5)		(31.6)
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	0.9		(0.6)		(13.2)
Adoption of new accounting pronouncements (Note 1)			0.1
Other comprehensive income before reclassifications	(1.3)		1.9		3.3
Amounts reclassified to consolidated statement of income	(0.0)	[1]	(0.0)	[2]	11.9	[1],[3]
Tax benefit (expense)	0.4		(0.5)		(2.6)
Other comprehensive income (loss)	(0.9)		1.4		12.6
Ending balance	0.0		0.9		(0.6)
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(12.0)		(4.2)		(0.6)
Adoption of new accounting pronouncements (Note 1)			(0.4)
Other comprehensive income before reclassifications	(30.2)		(9.7)		(7.9)
Amounts reclassified to consolidated statement of income	6.1	[1]	(0.0)	[2]	2.6	[1],[3]
Tax benefit (expense)	6.2		2.3		1.7
Other comprehensive income (loss)	(17.9)		(7.4)		(3.6)
Ending balance	$ (29.9)		$ (12.0)		$ (4.2)

[1] Amounts reclassified to cost of sales, selling, general and administrative expenses, or interest expense.

[2] Amounts reclassified to cost of sales or interest expense.

[3] In connection with the termination of international defined benefit pension plans, $11.9 was reclassified to SG&A.  All other amounts were reclassified to cost of sales.