Segment Information, Geographic and Product Data - Schedule of Net Sales by Geographic Segment (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Geographic Data
Net sales	$ 618.0	$ 572.2	$ 487.8	$ 479.8	$ 507.7	$ 473.6	$ 427.4	$ 389.0	$ 2,157.7	$ 1,797.6	$ 1,813.4
United States
Geographic Data
Net sales									1,429.4	1,198.3	1,243.5
Europe
Geographic Data
Net sales									383.0	349.6	321.4
Asia Pacific
Geographic Data
Net sales									174.8	127.2	129.5
Canada
Geographic Data
Net sales									65.7	47.7	44.9
Mexico
Geographic Data
Net sales									61.7	48.5	46.7
Other
Geographic Data
Net sales									$ 43.1	$ 26.3	$ 27.4