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Defined Benefit Pension Plans and Other Post-Employment Benefit Plans - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Components of net periodic benefit cost (income): |  |  |  |
Service cost | $ 1.0 | $ 1.7 | $ 3.2 | $ 5.2
Interest cost | 5.5 | 5.6 | 16.5 | 17.1
Expected return on plan assets | (9.6) | (10.0) | (28.9) | (30.1)
Amortization of net actuarial loss | 0.9 | 1.6 | 2.6 | 4.8
Net periodic (income) benefit cost | (2.2) | (1.1) | (6.6) | (3.0)
Cost (income) of settlement/curtailment | 1.6 | 1.3 | 1.7 | 2.6
Total benefit cost (income) | (0.6) | 0.2 | (4.9) | (0.4)
U.S. |  |  |  |
Components of net periodic benefit cost (income): |  |  |  |
Service cost | 0.0 | 0.0 | 0.1 | 0.1
Interest cost | 1.6 | 1.6 | 4.8 | 5.1
Expected return on plan assets | (2.2) | (2.4) | (6.6) | (7.3)
Amortization of net actuarial loss | 0.3 | 0.2 | 0.7 | 0.6
Net periodic (income) benefit cost | (0.3) | (0.6) | (1.0) | (1.5)
Cost (income) of settlement/curtailment | 1.4 | 0.4 | 1.4 | 1.2
Total benefit cost (income) | 1.1 | (0.2) | 0.4 | (0.3)
International |  |  |  |
Components of net periodic benefit cost (income): |  |  |  |
Service cost | 1.0 | 1.7 | 3.1 | 5.1
Interest cost | 3.9 | 4.0 | 11.7 | 12.0
Expected return on plan assets | (7.4) | (7.6) | (22.3) | (22.8)
Amortization of net actuarial loss | 0.6 | 1.4 | 1.9 | 4.2
Net periodic (income) benefit cost | (1.9) | (0.5) | (5.6) | (1.5)
Cost (income) of settlement/curtailment | 0.2 | 0.9 | 0.3 | 1.4
Total benefit cost (income) | (1.7) | 0.4 | (5.3) | (0.1)
Other employee benefit plans |  |  |  |
Components of net periodic benefit cost (income): |  |  |  |
Service cost | 0.0 | 0.0 | 0.0 | 0.1
Interest cost | 0.4 | 0.4 | 1.1 | 1.3
Amortization of net prior service cost | 0.0 | (0.3) | (0.2) | (1.1)
Amortization of net actuarial loss | 0.0 | 0.0 | (0.1) | (0.1)
Net periodic (income) benefit cost | 0.4 | 0.1 | 0.8 | 0.2
Cost (income) of settlement/curtailment | 0.0 | (13.5) | 0.0 | (13.5)
Total benefit cost (income) | $ 0.4 | $ (13.4) | $ 0.8 | $ (13.3)

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- Definition Defined benefit plan net periodic benefit cost income excluding settlements and curtailments. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit 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 (h)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) 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 (h)(5) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost recognized for passage of time related to 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)(2) -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 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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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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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment. + 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)(7) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee 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)(1) -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 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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