Segment and Geographic Information, Total Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Abstract]
Total assets	$ 1,536.1	$ 1,538.0
Operating Segments [Member] | VTS [Member]
Segment Reporting Information [Abstract]
Total assets	683.9	749.9
Operating Segments [Member] | CIS [Member]
Segment Reporting Information [Abstract]
Total assets	617.7	604.2
Operating Segments [Member] | BHVAC [Member]
Segment Reporting Information [Abstract]
Total assets	102.3	89.4
Corporate and Eliminations [Member]
Segment Reporting Information [Abstract]
Total assets	$ 132.2	$ 94.5