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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Income available for common shareholders	$ 520	$ 406	$ 1,252	$ 975
Income (loss) available for common shareholders	$ 520	$ 406	$ 1,252	$ 975
Weighted average common shares outstanding, basic (in shares)	2,137	2,019	2,136	2,005
Add incremental shares from assumed conversions:
Employee share-based compensation (in shares)	5	6	5	6
Equity Units (in shares)	0	114	0	126
Weighted average common share outstanding, diluted (in shares)	2,142	2,139	2,141	2,137
Total earnings (loss) per common share, diluted (in dollars per share)	$ 0.24	$ 0.19	$ 0.58	$ 0.46