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Pension Plans and Other Post Employment Benefit Plans | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | PENSION PLANS AND OTHER POST EMPLOYMENT BENEFITS The following sets forth the components of the company's net periodic (credit) benefit cost for defined benefit pension plans and other post employment benefits:
| Three Months Ended September 30, | Nine Months Ended September 30,
(In millions) | 2021 | 2020 | 2021 | 2020
Defined Benefit Pension Plans: |  |  |  |
Service cost | $ | 7 |  | $ | 6 |  | $ | 19 |  | $ | 19 |
Interest cost | 91 |  | 139 |  | 273 |  | 420 |
Expected return on plan assets | (228) |  | (250) |  | (686) |  | (750) |
Amortization of unrecognized loss | 14 |  | 1 |  | 41 |  | 3 |
Amortization of prior service benefit | — |  | — |  | (1) |  | (1) |
Settlement loss | — |  | — |  | 1 |  | 3 |
Net periodic (credit) benefit cost | $ | (116) |  | $ | (104) |  | $ | (353) |  | $ | (306) |
Other Post Employment Benefits: |  |  |  |
Service cost | $ | 1 |  | $ | — |  | $ | 1 |  | $ | 1 |
Interest cost | 5 |  | 16 |  | 16 |  | 49 |
Amortization of unrecognized loss | 23 |  | 1 |  | 70 |  | 1 |
Amortization of prior service benefit | (231) |  | — |  | (692) |  | — |
Curtailment gain | — |  | — |  | (1) |  | — |
Net periodic (credit) benefit cost | $ | (202) |  | $ | 17 |  | $ | (606) |  | $ | 51 |

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