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Goodwill (Narrative) (Details) - USD ($)					1 Months Ended			12 Months Ended
	Jan. 26, 2017	Dec. 30, 2016	Dec. 28, 2016	Jul. 07, 2016	Dec. 31, 2016	Aug. 31, 2016	Dec. 31, 2014	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Feb. 28, 2018	Feb. 05, 2016
Goodwill [Line Items]
Goodwill								$ 620,098,000	$ 615,252,000	$ 360,191,000
Proceeds from acquisition								970,000	0	0
Goodwill, post-closing inventory and apportionment adjustment								(4,481,000)
Goodwill impairment charge								0	0
Reporting unit, fair value in excess of carrying amount (percent)											19.00%
North American OTC Healthcare
Goodwill [Line Items]
Goodwill								580,934,000	$ 576,453,000	$ 330,615,000
Goodwill, post-closing inventory and apportionment adjustment								$ (4,481,000)
Cough and Cold, Dermatologicals, and Gastrointestinal products group | Disposal group, disposed of by sale, not discontinued operations | Pediacare, New Skin and Fiber Choice | North American OTC Healthcare
Goodwill [Line Items]
Goodwill, written off related to sale of business unit				$ 2,900,000
Consideration, excluding costs of inventory				$ 40,000,000
Cough and Cold, Dermatologicals, and Gastrointestinal products group | Disposal group, disposed of by sale, not discontinued operations | Dermoplast | North American OTC Healthcare
Goodwill [Line Items]
Goodwill, written off related to sale of business unit		$ 5,500,000
Cough and Cold, Dermatologicals, and Gastrointestinal products group | Disposal group, disposed of by sale, not discontinued operations | E.P.T. | North American OTC Healthcare
Goodwill [Line Items]
Goodwill, written off related to sale of business unit			$ 1,400,000
DenTek Oral Care, Inc.
Goodwill [Line Items]
Goodwill												$ 73,700,000
Proceeds from acquisition					$ 1,400,000
Goodwill, post-closing inventory and apportionment adjustment					(2,800,000)
Goodwill, purchase accounting adjustments and other post closing adjustments					$ 1,400,000
C.B. Fleet Company, Inc.
Goodwill [Line Items]
Goodwill	$ 273,058,000
Goodwill, post-closing inventory and apportionment adjustment	$ 273,100,000
Comet Brand
Goodwill [Line Items]
Gain on sale of asset							$ 1,300,000
Goodwill, written off related to sale of business unit						$ 600,000

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