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Savings Plans, Pension Plans and Other Postretirement Employee Benefits (Amounts Recorded in AOCI on Consolidated Balance Sheets, Not Recognized as Components of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Pension Plans [Member]
Net loss	$ 116,780	$ 128,849
Prior service cost (credit)	248	404
Net amount recognized	117,028	129,253
OPEB [Member]
Net loss	12,437	7,269
Prior service cost (credit)	(2,106)	(8,651)
Net amount recognized	$ 10,331	$ (1,382)

X

- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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-Publisher FASB
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-Topic 220
-SubTopic 10
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- Definition

Amount, after tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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