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, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Geographic Data
Net sales	$ 437.3	$ 585.4	$ 573.0	$ 585.4	$ 641.4	$ 609.9	$ 556.5	$ 572.4	$ 2,181.1	$ 2,380.2	$ 2,157.7
United States
Geographic Data
Net sales									1,393.4	1,606.7	1,429.4
Europe
Geographic Data
Net sales									387.4	387.2	383.0
Asia Pacific
Geographic Data
Net sales									237.5	196.3	174.8
Mexico
Geographic Data
Net sales									67.0	81.6	61.7
Canada
Geographic Data
Net sales									54.2	67.8	65.7
Other
Geographic Data
Net sales									$ 41.6	$ 40.6	$ 43.1