SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenues Disaggregated by Type of Customer) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Abstract]
Total operating revenues	$ 24,419	$ 24,428	$ 21,680
Electric
Disaggregation of Revenue [Abstract]
Total operating revenues	17,811	17,424	15,060
Natural gas
Disaggregation of Revenue [Abstract]
Total operating revenues	6,608	7,004	6,620
Pacific Gas & Electric Co (Utility)
Disaggregation of Revenue [Abstract]
Total operating revenues	24,419	24,428	21,680
Pacific Gas & Electric Co (Utility) | Electric
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	18,641	15,100	14,832
Regulatory balancing accounts	(830)	2,324	228
Total operating revenues	17,811	17,424	15,060
Pacific Gas & Electric Co (Utility) | Electric | Residential
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	7,504	6,041	6,130
Pacific Gas & Electric Co (Utility) | Electric | Commercial
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	7,201	5,643	5,416
Pacific Gas & Electric Co (Utility) | Electric | Industrial
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	2,065	1,784	1,626
Pacific Gas & Electric Co (Utility) | Electric | Agricultural
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	1,815	1,413	1,830
Pacific Gas & Electric Co (Utility) | Electric | Public street and highway lighting
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	103	83	77
Pacific Gas & Electric Co (Utility) | Electric | Other, net
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	(47)	136	(247)
Pacific Gas & Electric Co (Utility) | Natural gas
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	6,047	6,196	6,055
Regulatory balancing accounts	561	808	565
Total operating revenues	6,608	7,004	6,620
Pacific Gas & Electric Co (Utility) | Natural gas | Residential
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	3,089	3,686	3,353
Pacific Gas & Electric Co (Utility) | Natural gas | Commercial
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	984	1,052	1,005
Pacific Gas & Electric Co (Utility) | Natural gas | Transportation service only
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	1,815	1,603	1,534
Pacific Gas & Electric Co (Utility) | Natural gas | Other, net
Disaggregation of Revenue [Abstract]
Total revenue from contracts with customers	$ 159	$ (145)	$ 163