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Pension and Other Postretirement Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Net Benefit Costs | The Company has defined benefit pension plans covering eligible employees in the U.S. and in certain of its international subsidiaries. The net periodic benefit cost of such plans (including certain costs reported as part of discontinued operations) consisted of the following components:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
($ in millions) | U.S. |  | International |  | U.S. |  | International |  | U.S. |  | International |  | U.S. |  | International
Service cost | $ | 104 |  |  | $ | 75 |  |  | $ | 96 |  |  | $ | 76 |  |  | $ | 302 |  |  | $ | 254 |  |  | $ | 270 |  |  | $ | 222 |
Interest cost | 102 |  |  | 33 |  |  | 107 |  |  | 35 |  |  | 305 |  |  | 92 |  |  | 323 |  |  | 102 |
Expected return on plan assets | (188) |  |  | (105) |  |  | (193) |  |  | (104) |  |  | (568) |  |  | (313) |  |  | (581) |  |  | (309) |
Amortization of unrecognized prior service credit | (9) |  |  | (3) |  |  | (12) |  |  | (3) |  |  | (29) |  |  | (12) |  |  | (37) |  |  | (9) |
Net loss amortization | 75 |  |  | 32 |  |  | 75 |  |  | 32 |  |  | 218 |  |  | 110 |  |  | 228 |  |  | 94 |
Termination benefits | 2 |  |  | — |  |  | 1 |  |  | 1 |  |  | 54 |  |  | 3 |  |  | 5 |  |  | 2 |
Curtailments | (1) |  |  | — |  |  | 1 |  |  | — |  |  | 15 |  |  | (27) |  |  | 4 |  |  | (1) |
Settlements | 139 |  |  | — |  |  | 2 |  |  | — |  |  | 139 |  |  | 2 |  |  | 11 |  |  | 2 |
| $ | 224 |  |  | $ | 32 |  |  | $ | 77 |  |  | $ | 37 |  |  | $ | 436 |  |  | $ | 109 |  |  | $ | 223 |  |  | $ | 103 |
Other Postretirement Benefit Plans |
Defined Benefit Plan Disclosure [Line Items] |
Net Benefit Costs | The Company provides medical benefits, principally to its eligible U.S. retirees and similar benefits to their dependents, through its other postretirement benefit plans. The net credit of such plans consisted of the following components:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
($ in millions) | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | 11 |  |  | $ | 13 |  |  | $ | 37 |  |  | $ | 39 |
Interest cost | 12 |  |  | 14 |  |  | 34 |  |  | 43 |
Expected return on plan assets | (20) |  |  | (19) |  |  | (59) |  |  | (56) |
Amortization of unrecognized prior service credit | (16) |  |  | (18) |  |  | (48) |  |  | (54) |
Net gain amortization | (12) |  |  | (5) |  |  | (30) |  |  | (13) |
Termination benefits | — |  |  | — |  |  | 37 |  |  | — |
Curtailments | (1) |  |  | — |  |  | (29) |  |  | (1) |
| $ | (26) |  |  | $ | (15) |  |  | $ | (58) |  |  | $ | (42) |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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