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Benefit Plans | 9 Months Ended
--- | ---
Sep. 30, 2017
Retirement Benefits [Abstract] |
Benefit Plans |
9. | Benefit Plans
The Company has 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
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
(In millions) |  |  |  |  |  |  |  |
Service cost |  | $ | 2 |  |  | $ | 2 |  |  | $ | 6 |  |  | $ | 6 |
Interest cost |  |  | 30 |  |  |  | 33 |  |  |  | 89 |  |  |  | 97 |
Expected return on plan assets |  |  | (43 | ) |  |  | (45 | ) |  |  | (129 | ) |  |  | (133 | )
Amortization of unrecognized net loss |  |  | 10 |  |  |  | 11 |  |  |  | 32 |  |  |  | 34 |
Settlement charge |  |  | 7 |  |  |  | 1 |  |  |  | 10 |  |  |  | 3 |
Net periodic benefit cost |  | $ | 6 |  |  | $ | 2 |  |  | $ | 8 |  |  | $ | 7 |
|  | Other Postretirement Benefits
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
(In millions) |  |  |  |  |  |  |  |
Service cost |  |  |  |  |  | $ | 1 |  |  |  |  |  |  | $ | 1 |
Interest cost |  | $ | 1 |  |  |  | 1 |  |  | $ | 2 |  |  |  | 2 |
Expected return on plan assets |  |  | (1 | ) |  |  | (1 | ) |  |  | (3 | ) |  |  | (3 | )
Amortization of unrecognized prior service benefit |  |  | (1 | ) |  |  | (1 | ) |  |  | (2 | ) |  |  | (3 | )
Net periodic benefit cost |  | $ | (1 | ) |  | $ | - |  |  | $ | (3 | ) |  | $ | (3 | )

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- References No definition available. + Details
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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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