SCHEDULE II – CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 64	$ 58	$ 54
Charged to Costs and Expenses	34	55	50
Charged to Other Accounts	0	0	0
Deductions	42	49	46
Balance at End of Period	56	64	58
Pacific Gas & Electric Co
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	64	58
Balance at End of Period	$ 56	$ 64	$ 58