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Regulatory Assets and Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2023
Regulatory Assets and Liabilities |
Regulatory assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 3,574 | ​ | $ | 2,400
Power contracts | ​ |  | 23 | ​ |  | 71
Energy derivatives | ​ | ​ | 39 | ​ | ​ | —
Other | ​ |  | 20 | ​ |  | 26
Total current | ​ |  | 3,656 | ​ |  | 2,497
Long-term: | ​ |  |  | ​ |  |
Deferred income taxes, net of liabilities | ​ |  | 5,366 | ​ |  | 5,178
Unamortized investments, net of accumulated amortization | ​ |  | 110 | ​ |  | 113
Unamortized loss on reacquired debt | ​ |  | 103 | ​ |  | 109
Regulatory balancing and memorandum accounts | ​ |  | 1,107 | ​ |  | 1,589
Environmental remediation | ​ |  | 234 | ​ |  | 241
Recovery assets | ​ | ​ | 1,585 | ​ | ​ | 834
Other | ​ |  | 116 | ​ |  | 117
Total long-term | ​ |  | 8,621 | ​ |  | 8,181
Total regulatory assets | ​ | $ | 12,277 | ​ | $ | 10,678
Regulatory liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 779 | ​ | $ | 584
Energy derivatives | ​ |  | — | ​ |  | 338
Other | ​ |  | 18 | ​ |  | 42
Total current | ​ |  | 797 | ​ |  | 964
Long-term: | ​ |  |  | ​ |  |
Costs of removal | ​ |  | 2,705 | ​ |  | 2,589
Re-measurement of deferred taxes | ​ |  | 2,224 | ​ |  | 2,250
Recoveries in excess of ARO liabilities | ​ |  | 1,444 | ​ |  | 1,231
Regulatory balancing and memorandum accounts | ​ |  | 1,353 | ​ |  | 1,116
Pension and other postretirement benefits | ​ |  | 992 | ​ |  | 1,007
Other | ​ |  | 17 | ​ |  | 18
Total long-term | ​ |  | 8,735 | ​ |  | 8,211
Total regulatory liabilities | ​ | $ | 9,532 | ​ | $ | 9,175
Schedule of Regulatory Balancing Accounts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2023 |  | 2022
Asset (liability) |  | ​ |  |  | ​ |
Energy resource recovery account | ​ | $ | (471) | ​ | $ | 1,580
Portfolio allocation balancing account | ​ |  | 1,613 | ​ |  | (73)
New system generation balancing account | ​ |  | 135 | ​ |  | (63)
Public purpose programs and energy efficiency programs | ​ |  | (1,900) | ​ |  | (1,577)
Base revenue requirement balancing account | ​ |  | 1,566 | ​ |  | 1,108
GRC wildfire mitigation balancing accounts | ​ | ​ | 192 | ​ | ​ | 67
Residential uncollectibles balancing account | ​ | ​ | 28 | ​ | ​ | —
Greenhouse gas auction revenue and low carbon fuel standard revenue | ​ |  | (181) | ​ |  | (289)
FERC balancing accounts | ​ |  | (114) | ​ |  | (123)
Wildfire and drought restoration accounts | ​ |  | 383 | ​ |  | 352
Wildfire-related memorandum accounts | ​ | ​ | 886 | ​ | ​ | 1,168
COVID-19-related memorandum accounts | ​ | ​ | 69 | ​ | ​ | 67
Customer service re-platform memorandum account | ​ | ​ | 70 | ​ | ​ | 64
Tax accounting memorandum account and pole loading balancing account | ​ | ​ | 192 | ​ | ​ | 90
Excess bond and power charge balancing account | ​ | ​ | 9 | ​ | ​ | (56)
Other | ​ |  | 72 | ​ |  | (26)
Asset | ​ | $ | 2,549 | ​ | $ | 2,289

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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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