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Pension and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Apr. 03, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Transfer of pension plan asset to life insurance company |  |  |  |  | $ 100.0
transfer of pension plan obligation to Life Insurance company |  |  |  |  | $ 105.6
non-cash pension settlement loss | $ 60.6 | $ 0.0 | $ 60.6 | $ 0.0 |
Reclassification pension benefit obligations to AOCL | 5.6 |  |  |  |
Pension Plan [Member] |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Service cost | 1.2 | 1.3 |  |  |
Interest cost | 1.9 | 3.1 |  |  |
Expected return on plan assets | (2.5) | (4.7) |  |  |
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0.1 | 0.1 |  |  |
Recognized actuarial loss | 0.9 | 2.3 |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | (60.6) | 0.0 |  |  |
Net periodic benefit cost | 62.2 | 2.1 |  |  |
Other Postretirement Benefits Plan [Member] |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Service cost | 2.4 | 2.7 |  |  |
Interest cost | 5.4 | 6.2 |  |  |
Expected return on plan assets | (7.2) | (9.4) |  |  |
Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | 0.1 | 0.1 |  |  |
Recognized actuarial loss | 2.9 | 4.6 |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | (60.6) | 0.0 |  |  |
Net periodic benefit cost | $ 64.2 | $ 4.2 |  |  |

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- Definition Reclassification pension benefit obligations to AOCL + References No definition available. + Details
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- Definition Transfer of pension plan asset to life insurance company + References No definition available. + Details
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- Definition transfer of pension plan obligation to Life Insurance company + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
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