PREFERRED STOCK (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 08, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 31, 2022
Subsequent Event
Preferred Stock [Line Items]
Cumulative and unpaid dividends					$ 59.1
Preferred stock dividend requirement	$ 3.5
Pacific Gas & Electric Co (Utility)
Preferred Stock [Line Items]
Preferred stock dividend requirement		$ 14.0	$ 14.0	$ 14.0
Pacific Gas & Electric Co (Utility) | Minimum
Preferred Stock [Line Items]
Redemption price (in dollars per share)		$ 25.75	$ 25.75
Pacific Gas & Electric Co (Utility) | Maximum
Preferred Stock [Line Items]
Redemption price (in dollars per share)		$ 27.25	$ 27.25
Pacific Gas & Electric Co (Utility) | Nonredeemable Preferred Stock
Preferred Stock [Line Items]
Nonredeemable preferred stock outstanding		$ 145.0	$ 145.0
Preferred stock dividends per share, low range (in dollars per share)		$ 1.25
Preferred stock dividends per share, high range (in dollars per share)		$ 1.50
Pacific Gas & Electric Co (Utility) | Nonredeemable Preferred Stock | Minimum
Preferred Stock [Line Items]
Preferred stock interest rate		5.00%	5.00%
Pacific Gas & Electric Co (Utility) | Nonredeemable Preferred Stock | Maximum
Preferred Stock [Line Items]
Preferred stock interest rate		6.00%	6.00%
Pacific Gas & Electric Co (Utility) | Redeemable Preferred Stock
Preferred Stock [Line Items]
Redeemable preferred stock outstanding		$ 113.0	$ 113.0
Preferred stock dividends per share, low range (in dollars per share)		$ 1.09
Preferred stock dividends per share, high range (in dollars per share)		$ 1.25
Pacific Gas & Electric Co (Utility) | Redeemable Preferred Stock | Minimum
Preferred Stock [Line Items]
Preferred stock interest rate		4.36%	4.36%
Pacific Gas & Electric Co (Utility) | Redeemable Preferred Stock | Maximum
Preferred Stock [Line Items]
Preferred stock interest rate		5.00%	5.00%
PG&E Corporation
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)		400,000,000
Preferred stock, shares outstanding (in shares)		0
$25 Par Value | Pacific Gas & Electric Co (Utility)
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)		75,000,000
Preferred stock, par value (in dollars per share)		$ 25
$100 Par Value | Pacific Gas & Electric Co (Utility)
Preferred Stock [Line Items]
Preferred stock, shares authorized (in shares)		10,000,000
Preferred stock, shares outstanding (in shares)		0
Preferred stock, par value (in dollars per share)		$ 100