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, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Income available for common shareholders	$ 576	$ 348	$ 1,828	$ 1,323
Income (loss) available for common shareholders	$ 576	$ 348	$ 1,828	$ 1,323
Weighted average common shares outstanding, basic (in shares)	2,137	2,111	2,136	2,041
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	6	6	6	6
Equity Units (in shares)	0	23	0	91
Weighted average common share outstanding, diluted (in shares)	2,143	2,140	2,142	2,138
Total earnings (loss) per common share, diluted (in dollars per share)	$ 0.27	$ 0.16	$ 0.85	$ 0.62