Postretirement Benefits Contributions, Benefit Payments and Other (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Pension Plans [Member] | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Defined Benefit Plan, Accumulated Benefit Obligation | $ 652.8 | $ 716.9 | |||
| Expected Benefit Payments [Abstract] | |||||
| Company Contributions Expected to be Made in 2017 | 3.7 | ||||
| 2019 | [1] | 639.3 | |||
| 2020 | 3.5 | ||||
| 2021 | 3.1 | ||||
| 2022 | 2.9 | ||||
| 2023 | 2.8 | ||||
| 2024-2028 | 10.7 | ||||
| Other Postretirement Benefit Plans [Member] | |||||
| Expected Benefit Payments [Abstract] | |||||
| Company Contributions Expected to be Made in 2017 | 3.6 | ||||
| 2019 | [1] | 3.6 | |||
| 2020 | 3.4 | ||||
| 2021 | 3.2 | ||||
| 2022 | 2.9 | ||||
| 2023 | 2.8 | ||||
| 2024-2028 | $ 12.1 | ||||
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. No definition available.
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- References No definition available.
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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