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Changes in Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2024
Changes in Accumulated Other Comprehensive Income [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) | The following table presents changes in Exelon's AOCI, net of tax, by component:
Three Months Ended September 30, 2024 | Cash Flow Hedges |  | Pension and Non-Pension Postretirement Benefit Plan Items(a) |  |  |  | Total
Balance at June 30, 2024 | $ | 27 |  |  | $ | (739) |  |  |  |  | $ | (712) |
OCI before reclassifications | (28) |  |  | — |  |  |  |  | (28) |
Amounts reclassified from AOCI | (1) |  |  | 5 |  |  |  |  | 4 |
Net current-period OCI | (29) |  |  | 5 |  |  |  |  | (24) |
Balance at September 30, 2024 | $ | (2) |  |  | $ | (734) |  |  |  |  | $ | (736) |
Three Months Ended September 30, 2023 | Cash Flow Hedges |  | Pension and Non-Pension Postretirement Benefit Plan Items(a) |  |  |  | Total
Balance at June 30, 2023 | $ | 17 |  |  | $ | (647) |  |  |  |  | $ | (630) |
OCI before reclassifications | 22 |  |  | (3) |  |  |  |  | 19 |
Amounts reclassified from AOCI | (1) |  |  | 16 |  |  |  |  | 15 |
Net current-period OCI | 21 |  |  | 13 |  |  |  |  | 34 |
Balance at September 30, 2023 | $ | 38 |  |  | $ | (634) |  |  |  |  | $ | (596) |
Nine Months Ended September 30, 2024 | Cash Flow Hedges |  | Pension and Non-Pension Postretirement Benefit Plan Items(a) |  |  |  |  |  | Total
Balance at December 31, 2023 | $ | (3) |  |  | $ | (723) |  |  |  |  |  |  | $ | (726) |
OCI before reclassifications | 4 |  |  | (26) |  |  |  |  |  |  | (22) |
Amounts reclassified from AOCI | (3) |  |  | 15 |  |  |  |  |  |  | 12 |
Net current-period OCI | 1 |  |  | (11) |  |  |  |  |  |  | (10) |
Balance at September 30, 2024 | $ | (2) |  |  | $ | (734) |  |  |  |  |  |  | $ | (736) |
Nine Months Ended September 30, 2023 | Cash Flow Hedges |  | Pension and Non-Pension Postretirement Benefit Plan Items(a) |  |  |  |  |  | Total
Balance at December 31, 2022 | $ | 2 |  |  | $ | (640) |  |  |  |  |  |  | $ | (638) |
OCI before reclassifications | 37 |  |  | (16) |  |  |  |  |  |  | 21 |
Amounts reclassified from AOCI | (1) |  |  | 22 |  |  |  |  |  |  | 21 |
Net current-period OCI | $ | 36 |  |  | $ | 6 |  |  |  |  |  |  | $ | 42 |
Balance at September 30, 2023 | $ | 38 |  |  | $ | (634) |  |  |  |  |  |  | $ | (596) |
__________ (a)This AOCI component is included in the computation of net periodic pension and OPEB cost. See Note 14 — Retirement Benefits of the 2023 Form 10-K and Note 7 — Retirement Benefits for additional information. See Exelon's Statements of Operations and Comprehensive Income for individual components of AOCI.
Schedule of Income Taxes Allocated to Other Comprehensive Income (Loss) Components | The following table presents Income tax benefit (expense) allocated to each component of Exelon's Other comprehensive income (loss):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Pension and non-pension postretirement benefit plans: |  |  |  |  |  |  |
Actuarial losses reclassified to periodic benefit cost | $ | (2) |  |  | $ | (5) |  |  | $ | (6) |  |  | $ | (7) |
Pension and non-pension postretirement benefit plans valuation adjustments | — |  |  | 1 |  |  | 8 |  |  | 5 |
Unrealized gains on cash flow hedges | 10 |  |  | (7) |  |  | — |  |  | (11) |

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