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Pension and Postretirement Health and Life Benefits (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2015
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate |  |  | 3.70% |  |  | 4.50%
Pension Plan, Defined Benefit [Member] |  |  |  |  |  |
Defined Benefit Plan, Actuarial Loss From Remeasurement | $ 0.0 | $ 0.0 |  | $ 0.0 | $ (0.8) |
Selling, General and Administrative Expenses [Member] |  |  |  |  |  |
Defined Benefit Plan, Actuarial Loss From Remeasurement |  |  | $ 0.8 |  |  |

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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Details
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- Details
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