Condensed Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Revenues
Electric	$ 3,465	$ 3,463	$ 6,596	$ 6,476
Natural gas	704	754	1,547	1,640
Total operating revenues	4,169	4,217	8,143	8,116
Operating Expenses
Cost of electricity	1,156	1,277	2,106	2,277
Cost of natural gas	75	118	297	392
Operating and maintenance	1,838	1,484	3,848	3,407
Depreciation, amortization, and decommissioning	699	651	1,396	1,282
Total operating expenses	3,768	3,530	7,647	7,358
Operating Income	401	687	496	758
Interest income	5	3	9	4
Interest expense	(207)	(192)	(410)	(381)
Other income, net	23	18	50	76
Income Before Income Taxes	222	516	145	457
Income tax provision (benefit)	12	110	(175)	17
Net Income	210	406	320	440
Preferred stock dividend requirement of subsidiary	4	4	7	7
Income Available for Common Shareholders	$ 206	$ 402	$ 313	$ 433
Weighted Average Common Shares Outstanding, Basic	497	480	495	479
Weighted Average Common Shares Outstanding, Diluted	498	483	497	483
Net Earnings Per Common Share, Basic	$ 0.41	$ 0.84	$ 0.63	$ 0.90
Net Earnings Per Common Share, Diluted	0.41	0.83	0.63	0.90
Dividends Declared Per Common Share	$ 0.49	$ 0.46	$ 0.95	$ 0.91
Pacific Gas And Electric Company [Member]
Operating Revenues
Electric	$ 3,465	$ 3,462	$ 6,597	$ 6,476
Natural gas	704	754	1,547	1,640
Total operating revenues	4,169	4,216	8,144	8,116
Operating Expenses
Cost of electricity	1,156	1,277	2,106	2,277
Cost of natural gas	75	118	297	392
Operating and maintenance	1,837	1,483	3,848	3,406
Depreciation, amortization, and decommissioning	700	651	1,396	1,282
Total operating expenses	3,768	3,529	7,647	7,357
Operating Income	401	687	497	759
Interest income	4	3	8	4
Interest expense	(204)	(189)	(405)	(376)
Other income, net	21	20	45	46
Income Before Income Taxes	222	521	145	433
Income tax provision (benefit)	13	115	(172)	23
Net Income	209	406	317	410
Preferred stock dividend requirement	4	4	7	7
Income Available for Common Shareholders	$ 205	$ 402	$ 310	$ 403