Condensed Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues
Electric	$ 3,994	$ 3,868	$ 10,590	$ 10,344
Natural gas	816	682	2,363	2,322
Total operating revenues	4,810	4,550	12,953	12,666
Operating Expenses
Cost of electricity	1,613	1,681	3,719	3,958
Cost of natural gas	80	50	377	442
Operating and maintenance	1,783	1,621	5,631	5,028
Depreciation, amortization, and decommissioning	694	653	2,090	1,935
Total operating expenses	4,170	4,005	11,817	11,363
Operating Income	640	545	1,136	1,303
Interest income	8	2	17	6
Interest expense	(211)	(194)	(621)	(575)
Other income, net	24	24	74	100
Income Before Income Taxes	461	377	606	834
Income tax provision (benefit)	70	67	(105)	84
Net Income	391	310	711	750
Preferred stock dividend requirement of subsidiary	3	3	10	10
Income Available for Common Shareholders	$ 388	$ 307	$ 701	$ 740
Weighted Average Common Shares Outstanding, Basic	501	486	497	481
Weighted Average Common Shares Outstanding, Diluted	503	489	500	484
Net Earnings Per Common Share, Basic	$ 0.77	$ 0.63	$ 1.41	$ 1.54
Net Earnings Per Common Share, Diluted	0.77	0.63	1.40	1.53
Dividends Declared Per Common Share	$ 0.49	$ 0.46	$ 1.44	$ 1.37
Pacific Gas And Electric Company [Member]
Operating Revenues
Electric	$ 3,993	$ 3,868	$ 10,590	$ 10,344
Natural gas	816	682	2,363	2,322
Total operating revenues	4,809	4,550	12,953	12,666
Operating Expenses
Cost of electricity	1,613	1,681	3,719	3,958
Cost of natural gas	80	50	377	442
Operating and maintenance	1,782	1,622	5,630	5,028
Depreciation, amortization, and decommissioning	694	653	2,090	1,935
Total operating expenses	4,169	4,006	11,816	11,363
Operating Income	640	544	1,137	1,303
Interest income	8	2	16	6
Interest expense	(209)	(191)	(614)	(567)
Other income, net	23	22	68	68
Income Before Income Taxes	462	377	607	810
Income tax provision (benefit)	73	72	(99)	95
Net Income	389	305	706	715
Preferred stock dividend requirement	3	3	10	10
Income Available for Common Shareholders	$ 386	$ 302	$ 696	$ 705