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Retirement and Other Postretirement Benefit Plans - Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Postretirement Plans |  |
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income |  |
Net loss (gain) |  | $ (0.9)
Amortization of actuarial (losses) gains | $ 1.1 | 0.7
Total recognized in other comprehensive income (pre-tax) | 1.1 | (0.2)
U.S. Plans | Defined Benefit Retirement Plans |  |
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income |  |
Net loss (gain) | 0.1 | 0.1
Amortization of actuarial (losses) gains | (0.8) | (0.3)
Total recognized in other comprehensive income (pre-tax) | (0.7) | (0.2)
European Plans | Defined Benefit Retirement Plans |  |
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income |  |
Net loss (gain) | 2.3 | (5.0)
Amortization of actuarial (losses) gains | (0.4) | (0.7)
Effect of foreign exchange | 2.5 | (4.0)
Total recognized in other comprehensive income (pre-tax) | $ 4.4 | $ (9.7)

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- Definition Defined benefit plan amounts recognized in other comprehensive income amortization of actuarial gain losses before tax. + References No definition available. + Details
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- Definition Represents the effect of change in the exchange rate before tax recognized in other comprehensive income, including amounts arising during the period and reclassification adjustments of other comprehensive income as a result of being recognized as components of net periodic benefit cost for the period. + References No definition available. + Details
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- Definition Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of 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 (i) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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- Definition Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e637-108580 + Details
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