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Benefit Plans | 3 Months Ended
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Mar. 31, 2019
Retirement Benefits [Abstract] |
Benefit Plans | 8. Benefit Plans The Company and its subsidiaries have several non-contributory defined benefit plans and postretirement benefit plans covering eligible employees and retirees. The following table presents the components of net periodic (benefit) cost for the plans:
|  | Pension Benefits |  |  | Other Postretirement Benefits |
Three Months Ended March 31 |  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
(In millions) |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2 |  |  | $ | 2 |  |  |  |  |  |  |  |  |
Interest cost |  |  | 29 |  |  |  | 27 |  |  | $ | 1 |  |  | $ | 1 |
Expected return on plan assets |  |  | (40 | ) |  |  | (45 | ) |  |  | (1) |  |  |  | (1 | )
Amortization of unrecognized net loss |  |  | 11 |  |  |  | 11 |  |  |  |  |  |  |  |  |
Amortization of unrecognized prior service benefit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1 | )
Settlement charge |  |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |
Net periodic (benefit) cost |  | $ | 2 |  |  | $ | (1 | ) |  | $ | - |  |  | $ | (1 | )

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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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