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Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Projected Benefit Obligation, Fair Values Of Plan Assets And Amounts Recognized In The Balance Sheet |
|  |  | For the year ended |  | For the year ended |
|  |  | December 31, |  | December 31, |
| ($ in millions) |  | 2024 |  | 2023 |
| Change in projected benefit obligation (PBO) |  |  |  |  |  |  |
| PBO at the beginning of the period |  | $ | 2,442 |  | $ | 2,510 |
| Service cost |  |  | 47 |  |  | 51 |
| Interest cost |  |  | 126 |  |  | 129 |
| Actuarial gain |  |  | (5) |  |  | (44) |
| Benefits paid |  |  | (187) |  |  | (204) |
| Special/contractual termination benefits |  |  | 12 |  |  | - |
| PBO at the end of the period |  | $ | 2,435 |  | $ | 2,442 |
| Change in plan assets |  |  |  |  |  |  |
| Fair value of plan assets at the beginning of the period |  | $ | 2,268 |  | $ | 2,033 |
| Actual return on plan assets, net of expenses |  |  | 114 |  |  | 305 |
| Employer contributions |  |  | 133 |  |  | 134 |
| Benefits paid |  |  | (187) |  |  | (204) |
| Fair value of plan assets at the end of the period |  | $ | 2,328 |  | $ | 2,268 |
| Funded status |  | $ | (107) |  | $ | (174) |
| Amounts recognized in the consolidated balance sheet |  |  |  |  |  |  |
| Pension and other postretirement benefits - current |  | $ | - |  | $ | - |
| Pension and other postretirement benefits - noncurrent |  | $ | (107) |  | $ | (174) |
| Accumulated other comprehensive loss |  | $ | - |  | $ | - |
Net Periodic Benefit Cost |
|  |  | For the year ended |  | For the year ended |  | For the year ended
|  |  | December 31, |  | December 31, |  | December 31,
| ($ in millions) |  | 2024 |  | 2023 |  | 2022
| Components of total pension benefit cost (income) |  |  |  |  |  |  |  |  |
| Service cost |  | $ | 47 |  | $ | 51 |  | $ | 69
| Interest cost on projected benefit obligation |  |  | 126 |  |  | 129 |  |  | 106
| Expected return on plan assets |  |  | (164) |  |  | (148) |  |  | (181)
| (Gain) / Loss recognized |  |  | 45 |  |  | (202) |  |  | (218)
| Net periodic pension benefit cost (income) |  |  | 54 |  |  | (170) |  |  | (224)
| Pension settlement costs |  |  | - |  |  | - |  |  | 55
| Special/contractual termination benefits |  |  | 12 |  |  | - |  |  | -
| Total pension benefit cost (income) |  | $ | 66 |  | $ | (170) |  | $ | (169)
Weighted Average Asset Allocations, By Asset Category |
|  |  | 2024 |  | 2023 |
| Asset category: |  |  |  |  |  |  |
| Equity securities |  | 26 | % |  | 49 | % |
| Debt securities |  | 62 | % |  | 40 | % |
| Alternative and other investments |  | 12 | % |  | 11 | % |
| Total |  | 100 | % |  | 100 | % |
Expected Benefit Payments Over The Next Ten Years |
| ($ in millions) |  | Amount |
| 2025 |  | $ | 256 |
| 2026 |  |  | 245 |
| 2027 |  |  | 240 |
| 2028 |  |  | 238 |
| 2029 |  |  | 233 |
| 2030-2034 |  |  | 1,074 |
| Total |  | $ | 2,286 |
Schedule Of Assumptions Used |
|  |  | 12/31/2024 |  | 12/31/2023 |  | 12/31/2022
| Discount rate - used at period end to value obligation |  | 5.60 | % |  | 5.20 | % |  | 5.50 | %
| Discount rate - used to compute annual cost |  | 5.00 - 5.80 | % |  | 5.50 | % |  | 2.90 - 5.60 | %
| Expected long-term rate of return on plan assets |  | 7.50 - 6.65 | % |  | 7.50 | % |  | 7.50 | %
| Rate of increase in compensation levels |  | 3.00 | % |  | 3.00 | % |  | 3.00 | %
Schedule Of Changes In Projected Benefit Obligations For OPEB |
|  |  | For the year ended |  | For the year ended |
|  |  | December 31, |  | December 31, |
| ($ in millions) |  | 2024 |  | 2023 |
| Change in benefit obligation |  |  |  |  |  |  |
| Benefit obligation at the beginning of the period |  | $ | 561 |  | $ | 606 |
| Service cost |  |  | 7 |  |  | 8 |
| Interest cost |  |  | 28 |  |  | 31 |
| Plan amendments |  |  | - |  |  | (45) |
| Plan participants' contributions |  |  | 10 |  |  | 11 |
| Actuarial (gain) loss |  |  | (35) |  |  | 3 |
| Benefits paid |  |  | (48) |  |  | (53) |
| Benefit obligation at the end of the period |  | $ | 523 |  | $ | 561 |
| Change in plan assets |  |  |  |  |  |  |
| Fair value of plan assets at the beginning of the period |  | $ | - |  | $ | - |
| Plan participants' contributions |  |  | 10 |  |  | 11 |
| Employer contribution |  |  | 38 |  |  | 42 |
| Benefits paid |  |  | (48) |  |  | (53) |
| Fair value of the plan assets at end of the period |  | $ | - |  | $ | - |
| Funded status |  | $ | (523) |  | $ | (561) |
| Amounts recognized in the consolidated balance sheet |  |  |  |  |  |  |
| Pension and other postretirement benefits - current |  | $ | (39) |  | $ | (38) |
| Pension and other postretirement benefits - noncurrent |  | $ | (484) |  | $ | (523) |
| Accumulated other comprehensive gain |  | $ | (100) |  | $ | (125) |
Schedule Of Net Benefit Costs For OPEB |
|  |  | For the year ended |  | For the year ended |  | For the year ended |
|  |  | December 31, |  | December 31, |  | December 31, |
| ($ in millions) |  | 2024 |  | 2023 |  | 2022 |
| Components of total postretirement benefit cost / (income) |  |  |  |  |  |  |  |  |  |
| Service cost |  | $ | 7 |  | $ | 8 |  | $ | 13 |
| Interest cost on projected benefit obligation |  |  | 28 |  |  | 31 |  |  | 31 |
| Amortization of prior service credit |  |  | (25) |  |  | (22) |  |  | (13) |
| (Gain) loss recognized |  |  | (35) |  |  | 3 |  |  | (248) |
| Total postretirement benefit cost / (income) |  | $ | (25) |  | $ | 20 |  | $ | (217) |
Schedule Of Expected Benefit Payments For OPEB |
| ($ in millions) |  | Gross Benefit |  | Medicare Part D Subsidy |  | Total |
| 2025 |  | $ | 40 |  | $ | - |  | $ | 40 |
| 2026 |  |  | 41 |  |  | - |  |  | 41 |
| 2027 |  |  | 42 |  |  | - |  |  | 42 |
| 2028 |  |  | 44 |  |  | - |  |  | 44 |
| 2029 |  |  | 45 |  |  | - |  |  | 45 |
| 2030-2034 |  |  | 235 |  |  | - |  |  | 235 |
| Total |  | $ | 447 |  | $ | - |  | $ | 447 |
Net Periodic Benefit Cost Not Yet Recognized |
|  |  | OPEB |
| ($ in millions) |  | 2024 |  | 2023 |
| Prior service cost (credit) |  | $ | (100) |  | $ | (125) |
Amounts Recognized As A Component Of AOCI |
|  |  | For the year ended |  | For the year ended |
| OPEB |  | December 31, |  | December 31, |
| ($ in millions) |  | 2024 |  | 2023 |
| Accumulated other comprehensive loss (gain) at |  |  |  |  |  |  |
| the beginning of the period |  | $ | (125) |  | $ | (102) |
| Prior service (cost) credit amortized during the period |  |  | 25 |  |  | 22 |
| Prior service cost (credit) occurring during the period |  |  | - |  |  | (45) |
| Net amount recognized in comprehensive |  |  |  |  |  |  |
| loss for the period |  |  | 25 |  |  | (23) |
| Accumulated other comprehensive loss (gain) at |  |  |  |  |  |  |
| end of the period |  | $ | (100) |  | $ | (125) |
OPEB [Member] |
Schedule Of Assumptions Used |
|  |  | 12/31/2024 |  | 12/31/2023 |  | 12/31/2022
| Discount rate - used at period end to value obligation |  | 5.70% |  | 5.20% |  | 5.50%
| Discount rate - used to compute annual cost |  | 5.00% - 5.80% |  | 5.00% - 6.40% |  | 3.00% - 5.60%

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- Definition Tabular disclosure of the change in the benefit obligation of other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References No definition available. + Details
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- Definition Tabular disclosure of benefits expected to be paid by other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for 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 No definition available. + Details
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- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (d)(5) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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