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Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Net Period Benefit Costs Charged to Discontinued Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total income included in discontinued operations | $ (0.6) | $ 0.2 | $ (4.9) | $ (0.4)
Discontinued Operations |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total income included in discontinued operations |  | 0.0 |  | (0.4)
Defined benefit pension plans | Discontinued Operations |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total income included in discontinued operations |  | (0.1) |  | (0.5)
Other employee benefit plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total income included in discontinued operations | $ 0.4 | (13.4) | $ 0.8 | (13.3)
Other employee benefit plans | Discontinued Operations |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Total income included in discontinued operations |  | $ 0.1 |  | $ 0.1

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- Definition Amount of net periodic benefit cost (credit) for 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 (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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