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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Revenues Disaggregated by Type of Customer) (Details) - Pacific Gas & Electric Co - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Revenue from contracts with customers |  |  |  |
Total operating revenues | $ 3,943 | $ 4,234 | $ 7,954 | $ 8,290
Electric |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 2,732 | 3,047 | 5,060 | 5,723
Regulatory balancing accounts | 214 | 265 | 678 | 540
Total operating revenues | 2,946 | 3,312 | 5,738 | 6,263
Electric | Residential |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 994 | 1,039 | 2,282 | 2,375
Electric | Commercial |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 1,135 | 1,234 | 2,088 | 2,307
Electric | Industrial |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 326 | 354 | 619 | 678
Electric | Agricultural |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 261 | 318 | 347 | 443
Electric | Public street and highway lighting |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 16 | 18 | 33 | 38
Electric | Other |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 0 | 84 | (309) | (118)
Natural gas |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 647 | 707 | 2,365 | 2,106
Regulatory balancing accounts | 350 | 215 | (149) | (79)
Total operating revenues | 997 | 922 | 2,216 | 2,027
Natural gas | Residential |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 343 | 452 | 1,515 | 1,410
Natural gas | Commercial |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 129 | 119 | 369 | 315
Natural gas | Transportation service only |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | 304 | 264 | 686 | 560
Natural gas | Other |  |  |  |
Revenue from contracts with customers |  |  |  |
Total revenue from contracts with customers | $ (129) | $ (128) | $ (205) | $ (179)

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