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v3.22.2.2

Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2022
Retirement Benefits [Abstract] |
Company's pension and postretirement benefit plans |
Components of net cost (benefit) for pension and other postretirement plans |  |  |  |
|  | Three months ended September 30, |  | Nine months ended September 30,
($ in millions) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Pension benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 22 |  |  | $ | 27 |  |  | $ | 79 |  |  | $ | 78 |
Interest cost |  | 59 |  |  | 47 |  |  | 157 |  |  | 145 |
Expected return on plan assets |  | (85) |  |  | (112) |  |  | (295) |  |  | (338) |
Amortization of prior service credit |  | (2) |  |  | (13) |  |  | (27) |  |  | (38) |
Costs and expenses |  | (6) |  |  | (51) |  |  | (86) |  |  | (153) |
Remeasurement of projected benefit obligation |  | (254) |  |  | (25) |  |  | (1,427) |  |  | (292) |
Remeasurement of plan assets |  | 335 |  |  | 68 |  |  | 1,563 |  |  | (99) |
Remeasurement (gains) losses |  | 81 |  |  | 43 |  |  | 136 |  |  | (391) |
Pension net cost (benefit) |  | $ | 75 |  |  | $ | (8) |  |  | $ | 50 |  |  | $ | (544) |
Postretirement benefits |  |  |  |  |  |  |  |
Service cost |  | $ | — |  |  | $ | — |  |  | $ | 1 |  |  | $ | 1 |
Interest cost |  | 3 |  |  | 2 |  |  | 7 |  |  | 6 |
Amortization of prior service credit |  | (7) |  |  | (5) |  |  | (19) |  |  | (18) |
Costs and expenses |  | (4) |  |  | (3) |  |  | (11) |  |  | (11) |
Remeasurement of projected benefit obligation |  | (2) |  |  | (3) |  |  | (45) |  |  | (13) |
Remeasurement of plan assets |  | — |  |  | — |  |  | — |  |  | — |
Remeasurement (gains) losses |  | (2) |  |  | (3) |  |  | (45) |  |  | (13) |
Postretirement net benefit |  | $ | (6) |  |  | $ | (6) |  |  | $ | (56) |  |  | $ | (24) |
Pension and postretirement benefits |  |  |  |  |  |  |  |
Costs and expenses |  | $ | (10) |  |  | $ | (54) |  |  | $ | (97) |  |  | $ | (164) |
Remeasurement (gains) losses |  | 79 |  |  | 40 |  |  | 91 |  |  | (404) |
Total net cost (benefit) |  | $ | 69 |  |  | $ | (14) |  |  | $ | (6) |  |  | $ | (568) |
Pension and postretirement benefits remeasurement gains and losses |  |  |  |
|  | Three months ended September 30, |  | Nine months ended September 30,
($ in millions) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Remeasurement of projected benefit obligation (gains) losses: |  |  |  |  |  |  |  |
Discount rate |  | $ | (284) |  |  | $ | (32) |  |  | $ | (1,289) |  |  | $ | (271) |
Other assumptions |  | 28 |  |  | 4 |  |  | (183) |  |  | (34) |
Remeasurement of plan assets (gains) losses |  | 335 |  |  | 68 |  |  | 1,563 |  |  | (99) |
Remeasurement (gains) losses |  | $ | 79 |  |  | $ | 40 |  |  | $ | 91 |  |  | $ | (404) |

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