Document and Entity Information $ in Millions	Dec. 31, 2019 USD ($) shares
Entity Information [Line Items]
Document Type	10-K/A
Amendment Flag	true
Amendment Description	Amendment No. 1
Document Period End Date	Dec. 31, 2019
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity Registrant Name	PG&E CORPORATION
Entity Incorporation, State or Country Code	CA
Entity File Number	001-12609
Entity Tax Identification Number	94-3234914
Entity Address, Address Line One	77 Beale Street
Entity Address, Address Line Two	P.O. Box 770000
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94177
City Area Code	415
Local Phone Number	973-1000
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Small Business	false
Entity Public Float | $	$ 6,607
Entity Common Stock, Shares Outstanding | shares	529,785,896
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0001004980
Document Annual Report	true
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 5.50% nonredeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 5.50% nonredeemable
Trading Symbol	PCG-PB
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 4.80% redeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 4.80% redeemable
Trading Symbol	PCG-PG
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 5% series A redeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 5% series A redeemable
Trading Symbol	PCG-PE
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 5% redeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 5% redeemable
Trading Symbol	PCG-PD
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 6% nonredeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 6% nonredeemable
Trading Symbol	PCG-PA
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 4.36% series A redeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 4.36% series A redeemable
Trading Symbol	PCG-PI
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 5% nonredeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 5% nonredeemable
Trading Symbol	PCG-PC
Security Exchange Name	NYSEAMER
NYSE American LLC [Member] | First preferred stock, cumulative, par value $25 per share, 4.50% redeemable [Member]
Entity Information [Line Items]
Title of 12(b) Security	First preferred stock, cumulative, par value $25 per share, 4.50% redeemable
Trading Symbol	PCG-PH
Security Exchange Name	NYSEAMER
The New York Stock Exchange [Member] | Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common stock, no par value
Trading Symbol	PCG
Security Exchange Name	NYSE
PACIFIC GAS AND ELECTRIC COMPANY [Member]
Entity Information [Line Items]
Entity Registrant Name	PACIFIC GAS AND ELECTRIC COMPANY
Entity Incorporation, State or Country Code	CA
Entity File Number	001-02348
Entity Tax Identification Number	94-0742640
Entity Address, Address Line One	77 Beale Street
Entity Address, Address Line Two	P.O. Box 770000
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94177
City Area Code	415
Local Phone Number	973-7000
Entity Emerging Growth Company	false
Entity Central Index Key	0000075488