Significant Accounting Policies - Narrative (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended	12 Months Ended			108 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2020	Apr. 01, 2019
Property, Plant and Equipment [Line Items]
Allowance for doubtful accounts	$ 3.4	$ 3.4	$ 3.1		$ 3.4
Percentage of inventory valued using LIFO	61.00%	61.00%	62.00%		61.00%
Write-down of inventories		$ 4.6	$ 3.1	$ 4.3
Accelerated depreciation		$ 2.5	$ 3.9	2.3
Goodwill and intangible assets useful life		13 years	13 years
Impairment charges, long-lived assets		$ 15.5	$ 12.1	$ 14.1	$ 110.8
Preferred stock under the if-converted method (in shares)		9,998	15,979	15,985
Antidilutive shares excluded from computation for diluted net income per share (in shares)		900	1,000	2,600
Currency translation gains (losses)		$ 3.9	$ 1.9	$ 0.2
Advertising costs		13.3	11.9	10.7
Operating ROU assets	$ 71.1	71.1			71.1
Total lease liabilities	$ 75.9	$ 75.9			75.9
ASU 2016-02
Property, Plant and Equipment [Line Items]
Operating ROU assets						$ 70.8
Total lease liabilities						$ 73.0
Redeemable Convertible Preferred Stock
Property, Plant and Equipment [Line Items]
Preferred stock under the if-converted method (in shares)	16,000
Facility Closing
Property, Plant and Equipment [Line Items]
Impairment charges, long-lived assets			$ 0.3	$ 0.8	$ 3.6
Customer relationships (including distribution network)
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		13 years	13 years
Patents
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		10 years	10 years
Tradenames
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		13 years	13 years
Minimum | Customer relationships (including distribution network)
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		7 years
Minimum | Patents
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		3 years
Minimum | Tradenames
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		3 years
Minimum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		10 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		5 years
Minimum | Hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		3 years
Maximum | Customer relationships (including distribution network)
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		20 years
Maximum | Patents
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		15 years
Maximum | Tradenames
Property, Plant and Equipment [Line Items]
Goodwill and intangible assets useful life		15 years
Maximum | Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		30 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		10 years
Maximum | Hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life		5 years