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Employee Benefit Plans | 3 Months Ended
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Mar. 31, 2015
Compensation And Retirement Disclosure [Abstract] |
Employee Benefit Plans | Note 10—Employee benefit plans: Defined benefit plans – The components of our net periodic defined benefit pension cost are presented in the table below.
| Three months ended March 31, |
| 2014 |  |  | 2015 |
| (In millions) |
Service cost | $ | 2.6 |  |  | $ | 2.9 |
Interest cost |  | 6.3 |  |  |  | 4.6 |
Expected return on plan assets |  | (6.2 | ) |  |  | (5.4 | )
Amortization of unrecognized prior service cost |  | .2 |  |  |  | .2 |
Recognized actuarial losses |  | 2.8 |  |  |  | 3.8 |
Total | $ | 5.7 |  |  | $ | 6.1 |
Other postretirement benefits – The components of our net periodic other postretirement benefit cost are presented in the table below.
| Three months ended March 31, |
| 2014 |  |  | 2015 |
| (In millions) |
Interest cost | $ | .2 |  |  | $ | .2 |
Amortization of prior service credit |  | (.5 | ) |  |  | (.5 | )
Total | $ | (.3 | ) |  | $ | (.3 | )
Contributions – We expect to contribute the equivalent of $19.6 million and $1.3 million, respectively, to all of our defined benefit pension plans and other postretirement benefit plans during 2015.

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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 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 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 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35742057&loc=SL14450702-114947 Reference 4: 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 Reference 5: 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 + Details
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