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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
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Mar. 31, 2018 | Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |
Total income included in discontinued operations | $ (2.2) | $ (0.5)
Discontinued Operations |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total income included in discontinued operations |  | (0.2)
Defined benefit pension plans | Discontinued Operations |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total income included in discontinued operations |  | (0.2)
Other employee benefit plans | Discontinued Operations |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Total income included in discontinued operations |  | $ 0.0

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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + 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=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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