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PENSIONS AND OTHER POSTRETIREMENT BENEFITS | 6 Months Ended
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Jun. 30, 2015
Postemployment Benefits [Abstract] |
PENSIONS AND OTHER POSTRETIREMENT BENEFITS | NOTE 7 - PENSIONS AND OTHER POSTRETIREMENT BENEFITS The following are the components of defined benefit pension and OPEB expense for the three and six months ended June 30, 2015 and 2014: Defined Benefit Pension Expense
| (In Millions)
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Service cost | $ | 6.3 |  |  | $ | 6.8 |  |  | $ | 12.6 |  |  | $ | 13.5 |
Interest cost | 9.5 |  |  | 10.1 |  |  | 18.9 |  |  | 20.2 |
Expected return on plan assets | (15.0 | ) |  | (14.5 | ) |  | (29.9 | ) |  | (29.0 | )
Amortization: |  |  |  |  |  |  |
Prior service costs | 0.6 |  |  | 0.6 |  |  | 1.2 |  |  | 1.2 |
Net actuarial loss | 5.4 |  |  | 3.6 |  |  | 10.8 |  |  | 7.1 |
Curtailments/settlements | — |  |  | $ | 0.9 |  |  | 0.3 |  |  | 1.2 |
Net periodic benefit cost to continuing operations | $ | 6.8 |  |  | $ | 7.5 |  |  | $ | 13.9 |  |  | $ | 14.2 |
Other Postretirement Benefits Expense
| (In Millions)
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Service cost | $ | 1.5 |  |  | $ | 1.6 |  |  | $ | 3.0 |  |  | $ | 3.3 |
Interest cost | 3.2 |  |  | 3.4 |  |  | 6.5 |  |  | 6.8 |
Expected return on plan assets | (4.6 | ) |  | (4.3 | ) |  | (9.2 | ) |  | (8.6 | )
Amortization: |  |  |  |  |  |  |
Prior service costs | (0.9 | ) |  | (0.9 | ) |  | (1.8 | ) |  | (1.8 | )
Net actuarial loss | — |  |  | 1.2 |  |  | 3.1 |  |  | 2.5 |
Net periodic benefit cost to continuing operations | $ | (0.8 | ) |  | $ | 1.0 |  |  | $ | 1.6 |  |  | $ | 2.2 |
We made pension contributions of $0.3 million and $4.2 million for the three and six months ended June 30, 2015, compared to pension contributions of $5.3 million and $9.4 million for the three and six months ended June 30, 2014. OPEB contributions are typically made on an annual basis in the first quarter of each year, but due to plan funding requirements being met, no OPEB contributions were required or made for the three and six months ended June 30, 2015 and June 30, 2014.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947 Reference 2: 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=35743120&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414199&loc=d3e39622-114963 + Details
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