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Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2013
Employee Benefit Plans | Note 11 —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 September 30, |  |  | Nine months ended September 30, |
--- | --- | --- | --- | --- | ---
| 2012 |  |  | 2013 |  |  | 2012 |  |  | 2013 |
| (In millions) |
Service cost | $ |  | 2.5 |  |  | $ |  | 3.2 |  |  | $ |  | 7.7 |  |  | $ |  | 9.7 |
Interest cost |  | 6.2 |  |  |  | 6.0 |  |  |  | 19.1 |  |  |  | 17.9 |
Expected return on plan assets |  | (5.5 | ) |  |  | (5.8 | ) |  |  | (16.5 | ) |  |  | (17.8 | )
Amortization of unrecognized: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prior service cost |  | .4 |  |  |  | .4 |  |  |  | 1.2 |  |  |  | 1.2 |
Net transition obligations |  | .1 |  |  |  | .1 |  |  |  | .3 |  |  |  | .3 |
Recognized a ctuarial losses |  | 2.3 |  |  |  | 3.4 |  |  |  | 6.9 |  |  |  | 10.2 |
Total | $ |  | 6.0 |  |  | $ |  | 7.3 |  |  | $ |  | 18.7 |  |  | $ |  | 21.5 |
Other postretirement benefits – The components of our net periodic other postretirement benefit cost are presented in the table below.
| Three months ended September 30, |  |  | Nine months ended September 30, |
--- | --- | --- | --- | --- | ---
| 2012 |  |  | 2013 |  |  | 2012 |  |  | 2013 |
| (In millions) |  |  | (In millions) |
Service cost | $ |  | .1 |  |  | $ |  | .1 |  |  | $ |  | .2 |  |  | $ |  | .3 |
Interest cost |  | .1 |  |  |  | .3 |  |  |  | .6 |  |  |  | .5 |
Amortization of prior service credit |  | (.5 | ) |  |  | (.5 | ) |  |  | (1.4 | ) |  |  | (1.4 | )
Recognized actuarial losses |  | .1 |  |  |  | — |  |  |  | .1 |  |  |  | .1 |
Total | $ |  | (.2 | ) |  | $ |  | (.1 | ) |  | $ |  | (.5 | ) |  | $ |  | (.5 | )
Contributions – We expect to contribute the equivalent of $28.5 million and $1.6 million, respectively, to all of our defined benefit pension plans and other postretirement benefit plans during 2013.

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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 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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