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Pension and post-retirement benefits (Tables) | 6 Months Ended
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Jun. 30, 2017
Postemployment Benefits [Abstract] |
Schedule of Defined Benefit Plans Disclosures | The following table summarizes the components of net periodic benefit cost (income):
| Three Months Ended June 30, 2017 |  | Six Months Ended June 30, 2017
(in millions) | Pensions |  | Other Benefits |  | Pensions |  | Other Benefits
Components of net periodic benefit cost (income): |  |  |  |  |  |  |
Service cost (1) | $ | 0.3 |  |  | $ | — |  |  | $ | 0.6 |  |  | $ | — |
Interest cost (2) | 0.2 |  |  | — |  |  | 0.4 |  |  | — |
Expected return on plan assets (2) | (0.2 | ) |  | — |  |  | (0.4 | ) |  | — |
Net periodic benefit cost (income) | $ | 0.3 |  |  | $ | — |  |  | $ | 0.6 |  |  | $ | — |
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(1) | Included in "Cost of sales" on the Condensed Consolidated Statements of Operations.
(2) | Included in "Other (income) expense, net" on the Condensed Consolidated Statements of Operations.

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=77993564&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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