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Pension and Postretirement Benefits - Narrative (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($)
Postretirement Benefit Plans |
Defined Benefit Plan Disclosure [Line Items] |
Amount expected to contribute in postretirement benefit plans | $ 1.1
Pension and Other Postretirement Benefit Contributions | 0.3
Funded Plans | Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Amount expected to contribute in funded pension plans | 1.1
Pension Contributions | 0.2
Unfunded Pension Plans | Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Amount expected to contribute in unfunded pension plans | 1.0
Pension Contributions | $ 0.2

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- Definition Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current 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 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 + Details
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- Definition Amount of payment for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Amount of payment for pension benefits. Excludes other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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