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Contingent Liabilities and Other Matters - Asbestos Product Liability Matters (Details) - Asbestos Related Claims - claim	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Liability for Asbestos and Environmental Claims, Net [Roll Forward]
Pending claims, beginning of year	11,079	13,767	17,359
Claims filed	2,449	3,607	3,857
Claims resolved	(3,746)	(6,295)	(7,449)
Pending claims, end of year	9,782	11,079	13,767

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- Definition

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

+ References

No definition available.

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- Definition

The number of claims settled and dismissed during the period.

+ References

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)
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- Definition

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

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-Topic 450
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Number of pending claims pertaining to a loss contingency.

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-SubTopic 20
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