Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Revenues
Electric	$ 13,864	$ 13,657	$ 13,658
Natural gas	3,802	3,176	3,432
Total operating revenues	17,666	16,833	17,090
Operating Expenses
Cost of electricity	4,765	5,099	5,615
Cost of natural gas	615	663	954
Operating and maintenance	7,354	6,951	5,638
Depreciation, amortization, and decommissioning	2,755	2,612	2,433
Total operating expenses	15,489	15,325	14,640
Operating Income	2,177	1,508	2,450
Interest income	23	9	9
Interest expense	(829)	(773)	(734)
Other income (expense)	91	117	70
Income Before Income Taxes	1,462	861	1,795
Income tax provision (benefit)	55	(27)	345
Net Income	1,407	888	1,450
Preferred stock dividend requirement of subsidiary	14	14	14
Income Available for Common Shareholders	$ 1,393	$ 874	$ 1,436
Weighted Average Common Shares Outstanding, Basic	499	484	468
Weighted Average Common Shares Outstanding, Diluted	501	487	470
Net earnings per common share, basic	$ 2.79	$ 1.81	$ 3.07
Net Earnings Per Common Share, Diluted	$ 2.78	$ 1.79	$ 3.06
Pacific Gas And Electric Company [Member]
Operating Revenues
Electric	$ 13,865	$ 13,657	$ 13,656
Natural gas	3,802	3,176	3,432
Total operating revenues	17,667	16,833	17,088
Operating Expenses
Cost of electricity	4,765	5,099	5,615
Cost of natural gas	615	663	954
Operating and maintenance	7,352	6,949	5,635
Depreciation, amortization, and decommissioning	2,754	2,611	2,432
Total operating expenses	15,486	15,322	14,636
Operating Income	2,181	1,511	2,452
Interest income	22	8	8
Interest expense	(819)	(763)	(720)
Other income (expense)	88	87	77
Income Before Income Taxes	1,472	843	1,817
Income tax provision (benefit)	70	(19)	384
Net Income	1,402	862	1,433
Preferred stock dividend requirement	14	14	14
Income Available for Common Shareholders	$ 1,388	$ 848	$ 1,419