Acquisitions, Dispositions and Plant Closures (Narrative) (Details) - USD ($) $ in Millions	11 Months Ended
Mar. 31, 2018	Feb. 01, 2018
Omni Plastics [Member]
Business Acquisition [Line Items]
Business Combination, Net Earnings as a Percent of Acquirer's Net earnings		1.00%
Advanced Engineered Materials [Member] \| Nylon compounding division of Nilit Group [Member]
Business Acquisition [Line Items]
Goodwill, Purchase Accounting Adjustments	$ 2

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Balance Type:	debit
Period Type:	duration