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Legal Matters and Contingencies (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020 claim site	Dec. 31, 2020 USD ($) claim site	Dec. 31, 2019 USD ($) claim	Dec. 31, 2018 USD ($) claim
Liability for Asbestos and Environmental Claims, Net [Roll Forward]
Beginning claims		8,345	8,666
Pending claims, beginning			8,666	12,447
New claims	2,140		2,314	2,766
Resolved claims	(2,203)		(2,601)	(5,980)
Other	84		(34)	(567)
Ending claims	8,366	8,366	8,345	8,666
Pending claims, ending				8,666
Number of former public waste disposal sites | site	4	4
Litigation Settlement, Expense | $		$ 15.5	$ 21.8	$ 24.8
Payments For (Proceeds From) Insurance Settlements | $		$ (5.5)	$ 12.2	$ 12.6

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Loss Contingency, Claims Other, number

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Loss Contingency, Pending Claims

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Number of former public waste disposal sites.

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Payments For (Proceeds From) Insurance Settlements

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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Number of claims settled.

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The total number of new claims filed pertaining to a loss contingency during the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

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Number of pending claims pertaining to a loss contingency.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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