Indebtedness (Details) - USD ($) $ in Millions		6 Months Ended
		Sep. 30, 2019	Mar. 31, 2019
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 329.5	$ 387.7
Less: current portion		(93.6)	(48.6)
Less: unamortized debt issuance costs		(3.7)	(4.0)
Total long-term debt		232.2	335.1
Maturities of long term debt and capital lease obligations [Abstract]
Remainder of 2020		15.9
2021		84.5
2022		21.6
2023		21.6
2024		21.6
2025 & beyond		164.3
Total debt		329.5	387.7
Credit Facility [Abstract]
Short-term debt		139.4	66.0
Long-term debt, fair value		129.6	137.2
Term Loans [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 195.4	238.4
Fiscal year of maturity		Mar. 31, 2025
Maturities of long term debt and capital lease obligations [Abstract]
Total debt		$ 195.4	238.4
Term Loans [Member] | Weighted Average [Member]
Credit Facility [Abstract]
Weighted-average interest rate		3.30%
Revolving Credit Facility [Member]
Credit Facility [Abstract]
Short-term debt		$ 111.7	47.1
Revolving Credit Facility [Member] | Weighted Average [Member]
Credit Facility [Abstract]
Weighted-average interest rate		3.40%
Multi Currency Revolving Credit Facility [Member]
Credit Facility [Abstract]
Maximum borrowing capacity		$ 250.0
Deferred debt issuance costs		$ 1.1
Expiration date		Jun. 30, 2024
Foreign Credit Agreements [Member]
Credit Facility [Abstract]
Short-term debt		$ 27.7	18.9
Domestic Revolving Credit Facility [Member]
Credit Facility [Abstract]
Letters of credit outstanding		5.3
Available for future borrowings		133.0
6.8% Senior Notes [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 77.0	85.0
Interest rate percentage		6.80%
Fiscal year of maturity		Mar. 31, 2021
Maturities of long term debt and capital lease obligations [Abstract]
Total debt		$ 77.0	85.0
5.8% Senior Notes [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 50.0	50.0
Interest rate percentage		5.80%
Fiscal year of maturity		Mar. 31, 2027
Maturities of long term debt and capital lease obligations [Abstract]
Total debt		$ 50.0	50.0
Other [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt	[1]	7.1	14.3
Maturities of long term debt and capital lease obligations [Abstract]
Total debt	[1]	$ 7.1	$ 14.3

[1] Other long-term debt primarily includes borrowings by foreign subsidiaries and finance lease obligations.