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Regulatory Assets and Liabilities, Regulatory Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [1] | $ 528 | $ 418
Regulatory Liability, Noncurrent | [1] | 5,827 | 5,569
Regulatory assets not currently earning a return |  | 1,085 | 1,020
Regulatory assets not currently earning a return |  | 1,085 | 1,020
Other Current Liabilities |  |  |
Regulatory Liabilities [Line Items] |  |  |
Entity's Recorded Provision for Revenue Subject To Refund |  | 187 | 67
Deferred income tax adjustment and TCJA refunds |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [2] | 7 | 9
Regulatory Liability, Noncurrent | [2] | 3,015 | 3,110
Plant removal costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 0 | 0
Regulatory Liability, Noncurrent |  | 1,984 | 1,819
Effects of regulation on employee benefit costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [3] | 0 | 0
Regulatory Liability, Noncurrent | [3] | 253 | 247
Renewable resources and environmental initiatives |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 9 | 6
Regulatory Liability, Noncurrent |  | 188 | 173
Net AROs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [4] | 0 | 0
Regulatory Liability, Noncurrent | [4] | 90 | 0
Sales true-up and revenue decoupling |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 18 | 0
Regulatory Liability, Noncurrent |  | $ 76 | 77
Sales true-up and revenue decoupling | Maximum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 2 years |
ITC deferrals |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | $ 1 | 1
Regulatory Liability, Noncurrent |  | 60 | 61
LP&L Departure Payment |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 33 | 0
Regulatory Liability, Noncurrent |  | $ 33 | 0
LP&L Departure Payment | Maximum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 10 years |
Formula rates |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | $ 29 | 32
Regulatory Liability, Noncurrent |  | $ 18 | 17
Formula rates | Minimum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 1 year |
Formula rates | Maximum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 2 years |
DOE settlement |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | $ 18 | 12
Regulatory Liability, Noncurrent |  | $ 6 | 3
DOE settlement | Minimum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 1 year |
DOE settlement | Maximum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 2 years |
Contract valuation adjustments |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [5] | $ 56 | 175
Regulatory Liability, Noncurrent | [5] | 0 | 1
Deferred electric, natural gas and steam production costs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | 220 | 39
Regulatory Liability, Noncurrent |  | 0 | 0
Conservation programs |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current | [6] | 47 | 72
Regulatory Liability, Noncurrent | [6] | $ 0 | 0
Conservation programs | Minimum |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Amortization Period |  | 1 year |
Other |  |  |
Regulatory Liabilities [Line Items] |  |  |
Regulatory Liability, Current |  | $ 90 | 72
Regulatory Liability, Noncurrent |  | $ 104 | $ 61
[1] | Revenue subject to refund of $187 million and $67 million for 2023 and 2022, respectively, is included in other current liabilities.
[2] | Includes the revaluation of recoverable/regulated plant accumulated deferred income taxes and revaluation impact of non-plant accumulated deferred income taxes due to the TCJA.
[3] | Includes regulatory amortization and certain 2018 TCJA benefits approved by the CPUC to offset the PSCo prepaid pension asset.
[4] | Includes amounts recorded for future recovery of AROs, less amounts recovered through nuclear decommissioning accruals and gains from decommissioning investments.
[5] | Includes the fair value of FTR instruments utilized/intended to offset the impacts of transmission system congestion.
[6] | Includes costs for conservation programs, as well as incentives allowed in certain jurisdictions.

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