Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Pacific Gas And Electric Company [Member]
Customer advances for construction		$ 69	$ 88
Environmental reserve		85	111
Compensation		145	173
Tax carryforwards		1,462	946
Greenhouse Gas Allowances		340	56
Other		61	100
Total deferred income tax assets		2,162	1,474
Regulatory balancing accounts		691	512
Property related basis differences		9,638	8,666
Income tax regulatory asset	[1]	1,245	974
Other		75	86
Total deferred income tax liabilities		11,649	10,238
Total net deferred income tax liabilities		9,487	8,764
Included in current liabilities (assets)		0	(9)
Included in noncurrent liabilities		9,487	8,773
PG&E Corporation [Member]
Customer advances for construction		69	88
Environmental reserve		85	111
Compensation		219	244
Tax carryforwards		1,703	1,177
Greenhouse Gas Allowances		340	56
Other		44	74
Total deferred income tax assets		2,460	1,750
Regulatory balancing accounts		691	512
Property related basis differences		9,656	8,683
Income tax regulatory asset	[1]	1,244	974
Other		75	88
Total deferred income tax liabilities		11,666	10,257
Total net deferred income tax liabilities		9,206	8,507
Included in current liabilities (assets)		0	(6)
Included in noncurrent liabilities		$ 9,206	$ 8,513

[1] Represents the deferred income tax component of the cumulative differences between amounts recognized for ratemaking purposes and amounts recognized in accordance with GAAP. (See Note 3 above.)