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Pension and Other Postretirement Benefits Pension Narrative (Details) - Pension Plan [Member] $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	$ 0.6
Defined Benefit Plan, Interest Cost	6.5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(9.5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ (2.4)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

+ References

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-Publisher FASB
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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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