Condensed Consolidated Statements Of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Revenues
Electric	$ 2,799	$ 2,772
Natural gas	873	869
Total operating revenues	3,672	3,641
Operating Expenses
Cost of electricity	983	859
Cost of natural gas	346	343
Operating and maintenance	1,338	1,368
Depreciation, amortization, and decommissioning	503	584
Total operating expenses	3,170	3,154
Operating Income	502	487
Interest income	2	1
Interest expense	(176)	(174)
Other income, net	28	26
Income Before Income Taxes	356	340
Income tax provision	114	104
Net Income	242	236
Preferred stock dividend requirement of subsidiary	3	3
Income Available for Common Shareholders	239	233
Weighted average common shares outstanding, basic	434	414
Weighted Average Common Shares Outstanding, Diluted	435	416
Net Earnings Per Common Share, Basic	$ 0.55	$ 0.56
Net Earnings Per Common Share, Diluted	$ 0.55	$ 0.56
Dividends Declared Per Common Share	$ 0.46	$ 0.46
Pacific Gas And Electric Company [Member]
Operating Revenues
Electric	2,798	2,771
Natural gas	873	869
Total operating revenues	3,671	3,640
Operating Expenses
Cost of electricity	983	859
Cost of natural gas	346	343
Operating and maintenance	1,336	1,366
Depreciation, amortization, and decommissioning	503	584
Total operating expenses	3,168	3,152
Operating Income	503	488
Interest income	1	1
Interest expense	(170)	(168)
Other income, net	24	23
Income Before Income Taxes	358	344
Income tax provision	121	113
Net Income	237	231
Preferred stock dividend requirement	3	3
Income Available for Common Shareholders	$ 234	$ 228