Segment and Geographic Information, Net Sales by Geographical Area (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Abstract]
Net sales	$ 472.9	$ 473.4	$ 500.2	$ 529.0	$ 556.7	$ 541.0	$ 548.9	$ 566.1	$ 1,975.5	$ 2,212.7	$ 2,103.1
Reportable Geographical Components [Member] | United States [Member]
Segment Reporting Information [Abstract]
Net sales									941.9	1,032.3	911.4
Reportable Geographical Components [Member] | Italy [Member]
Segment Reporting Information [Abstract]
Net sales									187.4	217.3	211.5
Reportable Geographical Components [Member] | China [Member]
Segment Reporting Information [Abstract]
Net sales									168.5	172.1	156.0
Reportable Geographical Components [Member] | Hungary [Member]
Segment Reporting Information [Abstract]
Net sales									142.4	165.6	153.9
Reportable Geographical Components [Member] | Germany [Member]
Segment Reporting Information [Abstract]
Net sales									97.5	123.1	132.6
Reportable Geographical Components [Member] | Austria [Member]
Segment Reporting Information [Abstract]
Net sales									93.0	116.2	151.7
Reportable Geographical Components [Member] | Other [Member]
Segment Reporting Information [Abstract]
Net sales									$ 344.8	$ 386.1	$ 386.0