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INCOME TAXES (Schedule of Income Tax Provision (Benefit)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 0	$ (26)	$ 1
State	1	(34)	101
Deferred:
Federal	543	258	(2,361)
State	296	171	(1,136)
Tax credits	(4)	(7)	(5)
Income tax provision (benefit)	836	362	(3,400)
Pacific Gas & Electric Co (Utility)
Current:
Federal	0	(26)	4
State	0	(34)	94
Deferred:
Federal	588	290	(2,363)
State	316	185	(1,137)
Tax credits	(4)	(7)	(5)
Income tax provision (benefit)	$ 900	$ 408	$ (3,407)

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