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Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Pension Plans with Projected Benefit Obligations Greater than Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Savings Plans Pension Plans And Other Postretirement Employee Benefits [Abstract]
Projected benefit obligations	$ 350,091	$ 474,237
Fair value of plan assets	$ 265,546	$ 398,468

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- Definition

Savings Plans, Pension Plans and Other Postretirement Employee Benefits [Abstract]

+ References

No definition available.

+ Details

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- Definition

Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920

+ Details

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- Definition

Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2417-114920

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