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Employee Benefit Plans | 3 Months Ended
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Mar. 31, 2020
Retirement Benefits [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | Employee Benefit Plans Pension and Postretirement Plans. We sponsor both funded and unfunded domestic and foreign defined pension and other postretirement benefit plans, and defined contribution plans. Contributions to our plans were as follows:
| Quarter Ended March 31, |  |  |  |  |  |
(dollars in millions) | 2020 |  | 2019 |  |  |  |
Defined benefit plans | $ | 39 |  |  | $ | 32 |  |  |  |  |
Defined contribution plans | 227 |  |  | 153 |  |  |  |  |
We made no contributions to our domestic defined benefit pension plans for the quarters ended March 31, 2020 and 2019. Included in the current year contributions to employer sponsored defined contribution plans for the quarter ended March 31, 2020 is $48 million of additional contributions resulting from the 2019 amendment to our domestic pension plans whereby plan participants ceased accrual of additional benefits for future service effective December 31, 2019. The following table illustrates the components of net periodic benefit (income) cost for our defined pension and other postretirement benefit plans:
| Pension Benefits Quarter Ended March 31, |  |  |  | Other Postretirement Benefits Quarter Ended March 31, |  |
(dollars in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 55 |  |  | $ | 87 |  |  | $ | 1 |  |  | $ | 1 |
Interest cost | 272 |  |  | 340 |  |  | 6 |  |  | 8 |
Expected return on plan assets | (573) |  |  | (607) |  |  | (1) |  |  | (1) |
Amortization of prior service cost (credit) | 13 |  |  | 5 |  |  | (1) |  |  | (11) |
Recognized actuarial net loss (gain) | 94 |  |  | 53 |  |  | (3) |  |  | (3) |
Net settlement and curtailment loss | 1 |  |  | 8 |  |  | — |  |  | — |
Total net periodic benefit (income) cost | $ | (138) |  |  | $ | (114) |  |  | $ | 2 |  |  | $ | (6) |

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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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