Revenue - Summary of Revenue by Geography (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Consolidated net sales	$ 556.5	$ 487.8	$ 1,128.9	$ 967.5
United States
Disaggregation of Revenue [Line Items]
Consolidated net sales	385.3	327.1	769.3	646.9
Europe
Disaggregation of Revenue [Line Items]
Consolidated net sales	83.2	84.5	173.2	169.4
Asia Pacific
Disaggregation of Revenue [Line Items]
Consolidated net sales	43.7	40.8	92.3	78.6
Mexico
Disaggregation of Revenue [Line Items]
Consolidated net sales	20.4	11.4	42.7	23.3
Canada
Disaggregation of Revenue [Line Items]
Consolidated net sales	14.9	14.0	32.6	30.1
Other
Disaggregation of Revenue [Line Items]
Consolidated net sales	$ 9.0	$ 10.0	$ 18.8	$ 19.2