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Regulatory Assets and Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2024
Regulatory Assets and Liabilities |
Regulatory assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2024 |  | 2023
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 3,865 | ​ | $ | 2,502
Other | ​ |  | 45 | ​ |  | 22
Total current | ​ |  | 3,910 | ​ |  | 2,524
Long-term: | ​ |  |  | ​ |  |
Deferred income taxes | ​ |  | 5,752 | ​ |  | 5,533
Unamortized investments, net of accumulated amortization | ​ |  | 113 | ​ |  | 110
Unamortized losses on reacquired debt | ​ |  | 93 | ​ |  | 99
Regulatory balancing and memorandum accounts | ​ |  | 832 | ​ |  | 1,257
Environmental remediation | ​ |  | 226 | ​ |  | 226
Recovery assets | ​ | ​ | 1,535 | ​ | ​ | 1,558
Other | ​ |  | 107 | ​ |  | 114
Total long-term | ​ |  | 8,658 | ​ |  | 8,897
Total regulatory assets | ​ | $ | 12,568 | ​ | $ | 11,421
Regulatory liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2024 |  | 2023
Current: |  | ​ |  |  | ​ |
Regulatory balancing and memorandum accounts | ​ | $ | 1,157 | ​ | $ | 704
Other | ​ |  | 36 | ​ |  | 59
Total current | ​ |  | 1,193 | ​ |  | 763
Long-term: | ​ |  |  | ​ |  |
Costs of removal | ​ |  | 2,602 | ​ |  | 2,635
Deferred income taxes | ​ |  | 2,186 | ​ |  | 2,211
Recoveries in excess of ARO liabilities | ​ |  | 1,595 | ​ |  | 1,498
Regulatory balancing and memorandum accounts | ​ |  | 1,815 | ​ |  | 1,395
Pension and other postretirement benefits | ​ |  | 1,685 | ​ |  | 1,664
Other | ​ |  | 17 | ​ |  | 17
Total long-term | ​ |  | 9,900 | ​ |  | 9,420
Total regulatory liabilities | ​ | $ | 11,093 | ​ | $ | 10,183
Schedule of Regulatory Balancing Accounts | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
(in millions) |  | 2024 |  | 2023
Asset (liability) | ​ | ​ | ​ | ​ | ​ | ​
Energy procurement related costs |  | $ | 87 |  | $ | 397
Public purpose and energy efficiency | ​ | ​ | (1,897) | ​ | ​ | (1,736)
GRC related balancing accounts | ​ | ​ | 1,916 | ​ | ​ | 1,361
Wildfire risk mitigation and insurance | ​ | ​ | 859 | ​ | ​ | 1,169
Wildfire and drought restoration | ​ | ​ | 187 | ​ | ​ | 417
Residential uncollectibles balancing account | ​ | ​ | 101 | ​ | ​ | —
Customer service re-platform memorandum account | ​ | ​ | 81 | ​ | ​ | 21
Tax accounting memorandum account | ​ | ​ | 160 | ​ | ​ | 108
Other | ​ | ​ | 231 | ​ | ​ | (77)
Assets, net of liabilities | ​ | $ | 1,725 | ​ | $ | 1,660
​

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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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