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Pension and Other Postretirement Benefit Plans - Reconciliation of Net Postretirement Health and Life Amounts Recognized in Consolidated Balance Sheet (Details) - Postretirement Health and Life [Member] - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Net Loss	[1]	$ (25.0)	$ (21.1)
Prior Service Credit		4.6	4.6
Accumulated Net Periodic Benefit Cost in Excess of Contributions		(1.3)	(2.6)
Total Net Postretirement Health and Life Amounts Recognized in Consolidated Balance Sheet		$ (21.7)	$ (19.1)
[1] Excludes gains, losses and contributions associated with irrevocable grantor trusts.

X

- Definition

Accumulated Contributions in Excess of Net Periodic Benefit Cost (Prepaid Pension Asset)

+ References

No definition available.

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X

- Definition

Amount, before 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
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- Definition

Amount, before 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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-Topic 220
-SubTopic 10
-Section 45
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- Definition

Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 715
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-Paragraph 1
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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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