Indebtedness (Details) - USD ($) $ in Millions		9 Months Ended
		Dec. 31, 2018	Mar. 31, 2018
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 404.2	$ 431.6
Less: current portion		(45.7)	(39.9)
Less: unamortized debt issuance costs		(4.3)	(5.4)
Total long-term debt		354.2	386.3
Credit Facility [Abstract]
Short-term debt		67.5	53.2
Available for future borrowings		127.9
Long-term debt, fair value		139.9	153.1
Domestic Revolving Credit Facility [Member]
Credit Facility [Abstract]
Letters of credit outstanding		4.3
Available for future borrowings		126.8
Foreign Credit Agreements [Member]
Credit Facility [Abstract]
Short-term debt		23.6	31.9
Available for future borrowings		1.1
Term Loans [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 244.8	267.8
Fiscal year of maturity		Mar. 31, 2022
Multi Currency Revolving Credit Facility [Member]
Credit Facility [Abstract]
Short-term debt		$ 43.9	21.3
Maximum borrowing capacity		$ 175.0
Expiration date		Nov. 30, 2021
6.8% Senior Notes [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt		$ 89.0	101.0
Interest rate percentage		6.80%
Fiscal year of maturity		Mar. 31, 2021
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
Other [Member]
Long-term Debt and Capital Lease Obligations [Abstract]
Total debt	[1]	$ 20.4	$ 12.8
Fiscal year of maturity	[1]	Mar. 31, 2034

[1] Other long-term debt includes borrowings by foreign subsidiaries, capital lease obligations and other financing-type obligations.