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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Significant Accounting Policies, New Accounting Guidance (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	Mar. 31, 2017
New Accounting Guidance [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
Retained earnings	469.9				472.1				469.9	472.1
Deferred income taxes	104.8				97.1				104.8	97.1
Equity	$ 487.9				$ 533.9				$ 487.9	$ 533.9
ASU 2016-16 [Member]
New Accounting Guidance [Abstract]
Retained earnings											(8.3)
ASU 2016-09 [Member]
New Accounting Guidance [Abstract]
Deferred income taxes												$ 0.4
Equity												$ 0.4
ASU 2014-09 [Member] \| Maximum [Member]
New Accounting Guidance [Abstract]
Retained earnings											0.7
ASU 2014-09 [Member] \| Effect of Adoption of ASC 606 [Member]
New Accounting Guidance [Abstract]
Net sales											$ 3.0