Revenue - Summary of Revenue by Geography (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 641.4	$ 609.9	$ 556.5	$ 572.4	$ 618.0	$ 572.2	$ 487.8	$ 479.8	$ 2,380.2	$ 2,157.7	$ 1,797.6
United States
Disaggregation of Revenue [Line Items]
Net sales									1,606.7	1,429.4	1,198.3
Europe
Disaggregation of Revenue [Line Items]
Net sales									387.2	383.0	349.6
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales									196.3	174.8	127.2
Mexico
Disaggregation of Revenue [Line Items]
Net sales									81.6	61.7	48.5
Canada
Disaggregation of Revenue [Line Items]
Net sales									67.8	65.7	47.7
Other
Disaggregation of Revenue [Line Items]
Net sales									$ 40.6	$ 43.1	$ 26.3