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Postretirement Health Care and Life Insurance Benefits (Details 4) - Postretirement Health Care and Life Insurance Benefits [Member] $ in Millions | Dec. 31, 2016 USD ($)
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Defined Benefit Plan Disclosure [Line Items] |
Estimated net actuarial loss that will be amortized from accumulated other comprehensive (income) loss | $ 22.0
Estimated Future Benefit Payments |
Postretirement Benefits, 2017 | 55.0
Postretirement Benefits, 2018 | 56.2
Postretirement Benefits, 2019 | 57.0
Postretirement Benefits, 2020 | 57.5
Postretirement Benefits, 2021 | 61.3
Postretirement Benefits, Years 2022-2025 | 290.3
Prior service (cost) credit for the period | $ 9.2

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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + 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 (s) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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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. + 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 (f) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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