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EMPLOYEE BENEFIT PLANS | 9 Months Ended
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Sep. 30, 2022
Retirement Benefits [Abstract] |
EMPLOYEE BENEFIT PLANS | EMPLOYEE BENEFIT PLANSNet periodic benefit costs for qualified defined-benefit plans include the following (in millions):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Service cost | $ | 12 |  |  | $ | 13 |  |  | $ | 34 |  |  | $ | 39 |
Pension expense included in Wages and benefits | 12 |  |  | 13 |  |  | 34 |  |  | 39 |
Interest cost | 17 |  |  | 14 |  |  | 49 |  |  | 42 |
Expected return on assets | (32) |  |  | (30) |  |  | (96) |  |  | (91) |
Amortization of prior service cost (credit) | (1) |  |  | (1) |  |  | (1) |  |  | (1) |
Recognized actuarial loss | 2 |  |  | 9 |  |  | 6 |  |  | 27 |
Pension expense included in Non-operating Income (Expense) | $ | (14) |  |  | $ | (8) |  |  | $ | (42) |  |  | $ | (23) |

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