FAIR VALUE MEASUREMENTS (Equity Backstop Commitments) (Details)	Mar. 31, 2020 USD ($)
Fair Value Disclosures [Abstract]
Backstop commitments, fair value	$ 0
Backstop party commitment, issuance of common stock	9,000,000,000.0
Backstop commitment premium, fair value	$ 1,000,000,000

Plan of Reorganization, Backstop Party Commitment, Issuance of Common Stock

No definition available.

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Namespace Prefix:	pcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant