Consolidated Statements of Comprehensive Income (Loss) (Parentheticals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income recognized in other comprehensive income, interest rate hedges, tax	$ (5.9)	$ 0.7	$ 0.3
Derivatives, reclassification adjustment for amounts recognized in net income, tax	(1.8)	(0.3)	(0.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax	(0.2)	(0.1)	0.0
Net actuarial loss recognized during the year, tax	(1.5)	0.6	(1.1)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Costs Arising During Period, Tax	0.0	0.0	0.0
Net actuarial (gains) losses occurring during the year, tax	3.9	(3.1)	(4.0)
Net actuarial losses recognized due to settlement, tax	(0.3)	(0.1)	(1.3)
Other Comprehensive Income (Loss), Defined Benefit Plan, Newly Accounted Plans	0.0	(0.4)	0.0
Currency impact, tax	(0.5)	0.0	(0.3)
Translation adjustment
Translation adjustment and foreign currency hedges, tax	10.2	4.9	(2.7)
Foreign currency hedges
Translation adjustment and foreign currency hedges, tax	$ (0.3)	$ (0.4)	$ (1.2)