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Goodwill and Identifiable Intangibles (Identifiable Intangibles) (Details) $ in Millions		3 Months Ended
	Jan. 31, 2019	Jun. 30, 2019 USD ($)	Jun. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Impairment of indefinite-lived intangible assets		$ 0.0
Trade names | Cumberland Asset Acquisition
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life	10 years
Customer relationships | Cumberland Asset Acquisition
Finite-Lived Intangible Assets [Line Items]
Intangible assets, useful life	7 years
Measurement Input, Long-term Revenue Growth Rate | Mead Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Measurement Input			0.015
Measurement Input, Discount Rate | Mead Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Measurement Input			0.115

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Intangible Assets, Measurement Input

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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