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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Summary of Revenues Disaggregated by Type of Customer
The following table presents the Utility’s revenues disaggregated by type of customer:
Year Ended December 31,
(in millions)20222021
Electric
Revenue from contracts with customers
   Residential$6,130 $6,089 
   Commercial5,416 5,042 
   Industrial1,626 1,493 
   Agricultural1,830 1,565 
   Public street and highway lighting77 73 
   Other, net (1)
(247)(84)
      Total revenue from contracts with customers - electric14,832 14,178 
Regulatory balancing accounts (2)
228 953 
Total electric operating revenue$15,060 $15,131 
Natural gas
Revenue from contracts with customers
   Residential$3,353 $2,759 
   Commercial1,005 713 
   Transportation service only1,534 1,346 
   Other, net (1)
163 140 
      Total revenue from contracts with customers - gas6,055 4,958 
Regulatory balancing accounts (2)
565 553 
Total natural gas operating revenue6,620 5,511 
Total operating revenues$21,680 $20,642 
(1) This activity is primarily related to the change in unbilled revenue and amounts subject to refund, partially offset by other miscellaneous revenue items.
(2) These amounts represent revenues authorized to be billed or refunded to customers.
Schedule of Estimated Useful Lives and Balances of Utility's Property, Plant and Equipment The Utility’s estimated service lives of its property, plant, and equipment were as follows:
 Estimated ServiceBalance at December 31,
(in millions, except estimated service lives)Lives (years)20222021
Electricity generating facilities (1)
5 to 75
$11,781 $11,217 
Electricity distribution facilities
10 to 70
41,061 37,723 
Electricity transmission facilities
15 to 75
16,413 15,516 
Natural gas distribution facilities
20 to 60
15,366 14,100 
Natural gas transmission and storage facilities
5 to 66
9,859 9,067 
Financing lease18 18 
Construction work in progress4,137 3,480 
General plant and other
5 to 50
8,518 7,838 
Total property, plant, and equipment107,153 98,959 
Accumulated depreciation(30,946)(29,131)
Net property, plant, and equipment (2)
$76,207 $69,828 
(1) Balance includes nuclear fuel inventories. Stored nuclear fuel inventory is stated at weighted-average cost. Nuclear fuel in the reactor is expensed as it is used based on the amount of energy output. See Note 16 below.(2) Includes $1.8 billion of fire risk mitigation-related property, plant, and equipment securitized in accordance with AB 1054. See Note 5 below.
Changes In Asset Retirement Obligations The following table summarizes the changes in ARO liability during 2022 and 2021, including nuclear decommissioning obligations:
(in millions)20222021
ARO liability at beginning of year$5,298 $6,412 
Liabilities incurred134 — 
Revision in estimated cash flows325 (1,378)
Accretion213 287 
Liabilities settled(58)(23)
ARO liability at end of year$5,912 $5,298 
Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income
The changes, net of income tax, in PG&E Corporation’s accumulated other comprehensive income (loss) for the year ended December 31, 2022 consisted of the following:
(in millions, net of income tax)Pension
Benefits		Other
Benefits		Customer Credit TrustTotal
Beginning balance$(33)$18 $— $(15)
Other comprehensive income before reclassifications:
Loss on investments (net of taxes of $0, $0 and $3, respectively)
— — (6)(6)
Unrecognized net actuarial gain (net of taxes of $102, $99 and $0, respectively)
263 (255)— 8 
Regulatory account transfer (net of taxes of $94, $99 and $0, respectively)
(242)255 — 13 
Amounts reclassified from other comprehensive income:
Amortization of prior service cost (net of taxes of $1, $2 and $0, respectively) (1)
(3)5 — 2 
Amortization of net actuarial (gain) loss (net of taxes of $1, $11 and $0, respectively) (1)
1 (29)— (28)
Regulatory account transfer (net of taxes of $0, $9 and $0, respectively) (1)
2 24 — 26 
Net current period other comprehensive income (loss)21 — (6)15 
Ending balance$(12)$18 $(6)$— 
(1) These components are included in the computation of net periodic pension and other postretirement benefit costs.  See Note 13 below for additional details. 
The changes, net of income tax, in PG&E Corporation’s accumulated other comprehensive income (loss) for the year ended December 31, 2021 consisted of the following:
(in millions, net of income tax)Pension
Benefits		Other
Benefits		Total
Beginning balance$(39)$17 $(22)
Other comprehensive income before reclassifications:
Unrecognized net actuarial gain (net of taxes of $391 and $53, respectively)
1,007 137 1,144 
Regulatory account transfer (net of taxes of $390 and $53, respectively)
(1,003)(136)(1,139)
Amounts reclassified from other comprehensive income:
Amortization of prior service cost (net of taxes of $2 and $4, respectively) (1)
(4)10 6 
Amortization of net actuarial (gain) loss (net of taxes of $2 and $9, respectively)(1)
4 (24)(20)
Regulatory account transfer (net of taxes of $1 and $5, respectively) (1)
2 14 16 
Net current period other comprehensive income6 1 7 
Ending balance$(33)$18 $(15)
(1) These components are included in the computation of net periodic pension and other postretirement benefit costs.  See Note 13 below for additional details.
Schedule of Lease Expense The following table shows the lease expense recognized for the fixed and variable component of the Utility’s lease obligations:
Year Ended December 31,
(in millions)20222021
Operating lease fixed cost$500 $578 
Operating lease variable cost1,829 1,782 
Total operating lease costs$2,329 $2,360 
Schedule of Future Expected Operating Lease Payments At December 31, 2022, the Utility’s future expected operating lease payments were as follows:
(in millions)December 31, 2022
2023$307 
2024150 
2025146 
2026143 
2027142 
Thereafter2,196 
Total lease payments3,084 
Less imputed interest(1,610)
Total$1,474