Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring and repositioning expenses [Abstract]
Employee severance and related benefits	$ 0.0	$ 0.1	$ 0.1	$ 0.6
Other restructuring and repositioning expenses	0.0	0.3	0.1	1.5
Total	0.0	0.4	0.2	2.1
Changes in accrued severance [Roll Forward]
Beginning balance	4.8	4.0	11.0	6.5
Additions	0.0	0.1	0.1	0.6
Payments	(1.4)	(1.2)	(7.2)	(4.5)
Effect of exchange rate changes	0.0	0.1	(0.5)	0.4
Ending balance	$ 3.4	$ 3.0	$ 3.4	$ 3.0

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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