EARNINGS PER SHARE (Reconciliation of PG&E Corporation's Income Available for Common Shareholders and Weighted Average Shares of Common Stock Outstanding for Calculating Diluted EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Income (loss) available for common shareholders, basic	$ 607	$ 732
Income (loss) available for common shareholders diluted	$ 607	$ 732
Weighted average common shares outstanding, basic (in shares)	2,195,000,000	2,134,000,000
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	5,000,000	5,000,000
Weighted average common share outstanding, diluted (in shares)	2,200,000,000	2,139,000,000
Total earnings (loss) per common share, diluted (in dollars per share)	$ 0.28	$ 0.34
PG&E Corporation
Add incremental shares from assumed conversions:
Number of shares sold (in shares)	477,743,590	477,743,590