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Regulatory Assets and Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2023
Regulatory Assets and Liabilities |
Regulatory assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 2,357 | ​ | $ | 2,400
Power contracts | ​ |  | — | ​ |  | 71
Other | ​ |  | 51 | ​ |  | 26
Total current | ​ |  | 2,408 | ​ |  | 2,497
Long-term: | ​ |  |  | ​ |  |
Deferred income taxes | ​ |  | 5,456 | ​ |  | 5,178
Unamortized investments, net of accumulated amortization | ​ |  | 109 | ​ |  | 113
Unamortized loss on reacquired debt | ​ |  | 100 | ​ |  | 109
Regulatory balancing and memorandum accounts | ​ |  | 1,192 | ​ |  | 1,589
Environmental remediation | ​ |  | 233 | ​ |  | 241
Recovery assets | ​ | ​ | 1,571 | ​ | ​ | 834
Other | ​ |  | 113 | ​ |  | 117
Total long-term | ​ |  | 8,774 | ​ |  | 8,181
Total regulatory assets | ​ | $ | 11,182 | ​ | $ | 10,678
Regulatory liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 685 | ​ | $ | 584
Energy derivatives | ​ |  | — | ​ |  | 338
Other | ​ |  | 32 | ​ |  | 42
Total current | ​ |  | 717 | ​ |  | 964
Long-term: | ​ |  |  | ​ |  |
Costs of removal | ​ |  | 2,673 | ​ |  | 2,589
Deferred income taxes | ​ |  | 2,227 | ​ |  | 2,250
Recoveries in excess of ARO liabilities | ​ |  | 1,285 | ​ |  | 1,231
Regulatory balancing and memorandum accounts | ​ |  | 1,377 | ​ |  | 1,116
Pension and other postretirement benefits | ​ |  | 984 | ​ |  | 1,007
Other | ​ |  | 24 | ​ |  | 18
Total long-term | ​ |  | 8,570 | ​ |  | 8,211
Total regulatory liabilities | ​ | $ | 9,287 | ​ | $ | 9,175
Schedule of Regulatory Balancing Accounts |
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Asset (liability) |  | ​ |  |  | ​ |
Energy resource recovery account | ​ | $ | (141) | ​ | $ | 1,580
Portfolio allocation balancing account | ​ |  | 929 | ​ |  | (73)
New system generation balancing account | ​ |  | 237 | ​ |  | (63)
Public purpose programs and energy efficiency programs | ​ |  | (1,805) | ​ |  | (1,577)
Base revenue requirement balancing account | ​ |  | 1,006 | ​ |  | 1,108
GRC wildfire mitigation balancing accounts | ​ | ​ | 174 | ​ | ​ | 67
Residential uncollectibles balancing account | ​ | ​ | 51 | ​ | ​ | —
Greenhouse gas auction revenue and low carbon fuel standard revenue | ​ |  | (393) | ​ |  | (289)
FERC balancing accounts | ​ |  | (208) | ​ |  | (123)
Wildfire and drought restoration accounts | ​ |  | 432 | ​ |  | 352
Wildfire-related memorandum accounts | ​ | ​ | 985 | ​ | ​ | 1,168
Risk management balancing account1 | ​ | ​ | (74) | ​ | ​ | —
COVID-19-related memorandum accounts | ​ | ​ | 66 | ​ | ​ | 67
Customer service re-platform memorandum account | ​ | ​ | 96 | ​ | ​ | 64
Tax accounting memorandum account and pole loading balancing account | ​ | ​ | 61 | ​ | ​ | 90
Excess bond and power charge balancing account | ​ | ​ | 11 | ​ | ​ | (56)
Other | ​ |  | 60 | ​ |  | (26)
Asset | ​ | $ | 1,487 | ​ | $ | 2,289
​
1 | The risk management balancing account is used to support the administration of the customer-funded self-insurance program. See "Note 12—Contingencies—Southern California Wildfires and Mudslides—Wildfire Insurance Coverage" for more details.

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- Definition Tabular disclosure of assets that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 715 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481691/980-715-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481878/980-340-50-2 + Details
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- Definition Tabular disclosure of regulatory liabilities. Detailed information about liabilities that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 980 -SubTopic 405 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481854/980-405-25-1 + Details
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