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Defined Benefit Pension Plans | 3 Months Ended
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Mar. 31, 2019
Compensation And Retirement Disclosure [Abstract] |
Defined Benefit Pension Plans | Note 11—Defined benefit pension plans: The components of our net periodic defined benefit pension cost are presented in the table below.
|  | Three months ended March 31, |
|  | 2018 |  |  | 2019 |
|  | (In millions) |
Service cost |  | $ | 3.0 |  |  | $ | 2.8 |
Interest cost |  |  | 4.0 |  |  |  | 4.0 |
Expected return on plan assets |  |  | (4.0 | ) |  |  | (3.7 | )
Amortization of unrecognized prior service cost |  |  | .1 |  |  |  | .1 |
Recognized actuarial losses |  |  | 3.8 |  |  |  | 3.8 |
Total |  | $ | 6.9 |  |  | $ | 7.0 |
We expect to contribute the equivalent of approximately $18.2 million to all of our defined benefit pension plans during 2019.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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