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Pension and Other Postretirement Benefits (Details 2) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net periodic benefit cost and other amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Settlement loss | $ 4,000,000 | $ 24,000,000 |  | $ 21,000,000 |
Curtailment gains |  |  |  | 4,000,000 |
North America | Pension Plans |  |  |  |  |
Pre-tax amounts recognized in accumulated other comprehensive loss |  |  |  |  |
Prior service cost | 0 |  | $ 0 | 0 |
Net actuarial loss (gain) | 6,000,000 |  | 1,000,000 | 6,000,000 |
Pre-tax amounts recognized in accumulated other comprehensive loss, total | 6,000,000 |  | 1,000,000 | 6,000,000 |
Net periodic benefit cost and other amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Service cost |  |  | 5,000,000 | 16,000,000 | $ 20,000,000
Interest cost |  |  | 13,000,000 | 19,000,000 | 21,000,000
Expected return on plan assets |  |  | (15,000,000) | (22,000,000) | (24,000,000)
Settlement loss |  |  | 0 | 21,000,000 | 0
Curtailment gains |  |  | 0 | (4,000,000) | 0
Amortization of prior service cost |  |  | 0 | 1,000,000 | 1,000,000
Amortization of actuarial loss (gain) |  |  | 0 | 0 | 5,000,000
Net periodic benefit cost (income) |  |  | 3,000,000 | 31,000,000 | 23,000,000
Net actuarial (gain) loss |  |  | (6,000,000) | (2,000,000) | (31,000,000)
Settlement loss |  |  | 0 | (21,000,000) | 0
Curtailment effects |  |  | 0 | (20,000,000) | 0
Curtailment gains |  |  | 0 | 4,000,000 | 0
Amortization of prior service (cost) benefit |  |  | 0 | (1,000,000) | (1,000,000)
Amortization of actuarial (loss) gain |  |  | 0 | 0 | (5,000,000)
Total recognized in other comprehensive (income) loss |  |  | (6,000,000) | (40,000,000) | (37,000,000)
Total recognized in net periodic benefit cost (income) and other comprehensive (income) loss |  |  | (3,000,000) | (9,000,000) | (14,000,000)
Benefit obligation and fair value of plan assets by pension plans |  |  |  |  |
Accumulated benefit obligation | 269,000,000 |  | 290,000,000 | 269,000,000 |
Accumulated benefit obligation | 163,000,000 |  | 0 | 163,000,000 |
Fair value of plan assets | 143,000,000 |  | 0 | 143,000,000 |
Projected benefit obligation | (167,000,000) |  | (176,000,000) | (167,000,000) |
Fair value of plan assets | 143,000,000 |  | 174,000,000 | 143,000,000 |
North America | Retiree Medical |  |  |  |  |
Pre-tax amounts recognized in accumulated other comprehensive loss |  |  |  |  |
Prior service cost | 0 |  | 0 | 0 |
Net actuarial loss (gain) | (4,000,000) |  | (6,000,000) | (4,000,000) |
Pre-tax amounts recognized in accumulated other comprehensive loss, total | (4,000,000) |  | (6,000,000) | (4,000,000) |
Net periodic benefit cost and other amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Service cost |  |  | 0 | 0 | 0
Interest cost |  |  | 1,000,000 | 1,000,000 | 1,000,000
Expected return on plan assets |  |  | 0 | 0 | 0
Settlement loss |  |  | 0 | 0 | 0
Curtailment gains |  |  | 0 | 0 | 0
Amortization of prior service cost |  |  | 0 | 0 | 0
Amortization of actuarial loss (gain) |  |  | (1,000,000) | 0 | 0
Net periodic benefit cost (income) |  |  | 0 | 1,000,000 | 1,000,000
Net actuarial (gain) loss |  |  | (2,000,000) | (8,000,000) | 0
Settlement loss |  |  | 0 | 0 | 0
Curtailment effects |  |  | 0 | 0 | 0
Curtailment gains |  |  | 0 | 0 | 0
Amortization of prior service (cost) benefit |  |  | 0 | 0 | 0
Amortization of actuarial (loss) gain |  |  | 1,000,000 | 0 | 0
Total recognized in other comprehensive (income) loss |  |  | (1,000,000) | (8,000,000) | 0
Total recognized in net periodic benefit cost (income) and other comprehensive (income) loss |  |  | (1,000,000) | (7,000,000) | 1,000,000
UNITED KINGDOM |  |  |  |  |
Pre-tax amounts recognized in accumulated other comprehensive loss |  |  |  |  |
Prior service cost | 1,000,000 |  | 1,000,000 | 1,000,000 |
Net actuarial loss (gain) | 56,000,000 |  | 73,000,000 | 56,000,000 |
Pre-tax amounts recognized in accumulated other comprehensive loss, total | 57,000,000 |  | 74,000,000 | 57,000,000 |
UNITED KINGDOM | Pension Plans |  |  |  |  |
Net periodic benefit cost and other amounts recognized in accumulated other comprehensive loss: |  |  |  |  |
Service cost |  |  | 0 | 0 | 0
Interest cost |  |  | 16,000,000 | 10,000,000 | 9,000,000
Expected return on plan assets |  |  | (25,000,000) | (14,000,000) | (14,000,000)
Settlement loss |  |  | 0 | 0 | 0
Curtailment gains |  |  | 0 | 0 | 0
Amortization of prior service cost |  |  | 0 | 0 | 0
Amortization of actuarial loss (gain) |  |  | 0 | 2,000,000 | 4,000,000
Net periodic benefit cost (income) |  |  | (9,000,000) | (2,000,000) | (1,000,000)
Net actuarial (gain) loss |  |  | 14,000,000 | (22,000,000) | (36,000,000)
Settlement loss |  |  | 0 | 0 | 0
Curtailment effects |  |  | 0 | 0 | 0
Curtailment gains |  |  | 0 | 0 | 0
Amortization of prior service (cost) benefit |  |  | 0 | 0 | 0
Amortization of actuarial (loss) gain |  |  | 0 | (2,000,000) | (4,000,000)
Total recognized in other comprehensive (income) loss |  |  | 14,000,000 | (24,000,000) | (40,000,000)
Total recognized in net periodic benefit cost (income) and other comprehensive (income) loss |  |  | 5,000,000 | (26,000,000) | $ (41,000,000)
Benefit obligation and fair value of plan assets by pension plans |  |  |  |  |
Accumulated benefit obligation | 347,000,000 |  | 367,000,000 | 347,000,000 |
Fair value of plan assets | 320,000,000 |  | 360,000,000 | 320,000,000 |
Projected benefit obligation | (347,000,000) |  | (367,000,000) | (347,000,000) |
Fair value of plan assets | $ 320,000,000 |  | 360,000,000 | $ 320,000,000 |
Consolidated pension funding contributions for 2024 |  |  | $ 27,000,000 |  |

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