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v3.23.2

Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2023
Retirement Benefits [Abstract] |
Schedule of company's pension and postretirement benefit plans |
Components of net cost (benefit) for pension and other postretirement plans |  |  |  |
|  | Three months ended June 30, |  | Six months ended June 30,
($ in millions) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Pension benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 32 |  |  | $ | 28 |  |  | $ | 65 |  |  | $ | 57 |
Interest cost |  | 58 |  |  | 52 |  |  | 118 |  |  | 98 |
Expected return on plan assets |  | (79) |  |  | (100) |  |  | (156) |  |  | (210) |
Amortization of prior service credit |  | — |  |  | (12) |  |  | — |  |  | (25) |
Costs and expenses |  | 11 |  |  | (32) |  |  | 27 |  |  | (80) |
Remeasurement of projected benefit obligation |  | (68) |  |  | (421) |  |  | 55 |  |  | (1,173) |
Remeasurement of plan assets |  | 30 |  |  | 699 |  |  | (150) |  |  | 1,228 |
Remeasurement (gains) losses |  | (38) |  |  | 278 |  |  | (95) |  |  | 55 |
Pension net (benefit) cost |  | $ | (27) |  |  | $ | 246 |  |  | $ | (68) |  |  | $ | (25) |
Postretirement benefits |  |  |  |  |  |  |  |
Service cost |  | $ | — |  |  | $ | 1 |  |  | $ | — |  |  | $ | 1 |
Interest cost |  | 2 |  |  | 2 |  |  | 5 |  |  | 4 |
Amortization of prior service credit |  | (6) |  |  | (6) |  |  | (12) |  |  | (12) |
Costs and expenses |  | (4) |  |  | (3) |  |  | (7) |  |  | (7) |
Remeasurement of projected benefit obligation |  | (2) |  |  | (19) |  |  | 2 |  |  | (43) |
Remeasurement of plan assets |  | — |  |  | — |  |  | — |  |  | — |
Remeasurement (gains) losses |  | (2) |  |  | (19) |  |  | 2 |  |  | (43) |
Postretirement net benefit |  | $ | (6) |  |  | $ | (22) |  |  | $ | (5) |  |  | $ | (50) |
Pension and postretirement benefits |  |  |  |  |  |  |  |
Costs and expenses |  | $ | 7 |  |  | $ | (35) |  |  | $ | 20 |  |  | $ | (87) |
Remeasurement (gains) losses |  | (40) |  |  | 259 |  |  | (93) |  |  | 12 |
Total net (benefit) cost |  | $ | (33) |  |  | $ | 224 |  |  | $ | (73) |  |  | $ | (75) |
Pension and postretirement benefits remeasurement gains and losses |  |  |  |
|  | Three months ended June 30, |  | Six months ended June 30,
($ in millions) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Remeasurement of projected benefit obligation (gains) losses: |  |  |  |  |  |  |  |
Discount rate |  | $ | (73) |  |  | $ | (420) |  |  | $ | 51 |  |  | $ | (1,005) |
Other assumptions |  | 3 |  |  | (20) |  |  | 6 |  |  | (211) |
Remeasurement of plan assets (gains) losses |  | 30 |  |  | 699 |  |  | (150) |  |  | 1,228 |
Remeasurement (gains) losses |  | $ | (40) |  |  | $ | 259 |  |  | $ | (93) |  |  | $ | 12 |

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