Condensed Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) Condensed Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]
Net realized and unrealized loss on derivatives, net of tax (benefit)	$ (0.7)	$ (2.7)	$ (2.2)	$ 0.2	$ 0.4	$ 1.6
Long-term employee benefit plans, net of (benefit) expense	0.2	(0.4)	0.5	0.4	0.0	(0.3)
Foreign currency translation, net of tax	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0