Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 31.6	$ 27.7
Derivative financial instruments:
Unrealized losses arising during the period, net of tax expense (benefit) of ($0.9) and ($0.2)	(3.4)	(1.0)
Reclassification adjustments for losses included in net income, net of tax expense (benefit) of ($0.1) and $0.0	0.2	0.1
Currency translation adjustment:
Unrealized gains (losses) arising during the period, net of tax expense (benefit) of ($0.2) and ($0.2)	(1.1)	0.3
Other comprehensive income (loss)	(4.3)	(0.6)
Comprehensive income	$ 27.3	$ 27.1