Components of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		$ (77.6)	$ (66.7)
Other comprehensive income (loss) before reclassifications		30.1	(40.0)
Amounts reclassified to consolidated statement of income	[1]	0.8	1.1
Tax benefit (expense)		(7.9)	6.2
Other comprehensive income (loss)		23.0	(32.7)
Ending balance		(54.6)	(99.4)
Foreign Currency Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(26.4)	(36.8)
Other comprehensive income (loss) before reclassifications		(0.6)	(13.0)
Amounts reclassified to consolidated statement of income	[1]	(0.0)	(0.0)
Tax benefit (expense)		(0.0)	(0.0)
Other comprehensive income (loss)		(0.6)	(13.0)
Ending balance		(27.0)	(49.8)
Defined Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		0.0	0.0
Other comprehensive income (loss) before reclassifications		(0.9)	0.0
Amounts reclassified to consolidated statement of income	[1]	(0.0)	(0.0)
Tax benefit (expense)		0.2	(0.0)
Other comprehensive income (loss)		(0.7)	0.0
Ending balance		(0.7)	0.0
Derivative Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance		(51.2)	(29.9)
Other comprehensive income (loss) before reclassifications		31.6	(27.0)
Amounts reclassified to consolidated statement of income	[1]	0.8	1.1
Tax benefit (expense)		(8.1)	6.2
Other comprehensive income (loss)		24.3	(19.7)
Ending balance		$ (26.9)	$ (49.6)

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