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Postretirement and Other Benefits (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Domestic Plan |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Amortization of accumulated other comprehensive loss related to benefit plans | $ 3.7 |  | $ 3.7 |
Domestic Plan | Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Service cost | 0.0 | $ 0.0 | 0.0 | $ 0.0
Interest cost | 1.1 | 1.2 | 2.2 | 2.4
Expected return on plan assets | (1.4) | (1.6) | (2.9) | (3.2)
Amortizations and other | 0.8 | 0.9 | 1.7 | 1.8
Net periodic benefit cost | 0.5 | 0.5 | 1.0 | 1.0
Domestic Plan | Other Postretirement Benefits Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Service cost | 0.0 | 0.0 | 0.0 | 0.0
Interest cost | 0.0 | 0.0 | 0.0 | 0.0
Expected return on plan assets | 0.0 | 0.0 | 0.0 | 0.0
Amortizations and other | 0.0 | 0.0 | 0.1 | 0.1
Net periodic benefit cost | 0.0 | 0.0 | 0.1 | 0.1
FRANCE |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Amortization of accumulated other comprehensive loss related to benefit plans | 0.8 |  | 0.8 |
FRANCE | Pension Plan [Member] |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |
Service cost | 0.3 | 0.3 | 0.6 | 0.5
Interest cost | 0.1 | 0.1 | 0.2 | 0.2
Expected return on plan assets | (0.1) | (0.1) | (0.1) | (0.1)
Amortizations and other | 0.2 | 0.3 | 0.4 | 0.6
Net periodic benefit cost | $ 0.5 | $ 0.6 | $ 1.1 | $ 1.2

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
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