Commitments And Contingencies (Legal And Regulatory Contingencies) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Number Of Deaths		43
Number Of Structures Burned By Fire		8,900
SED imposed minimum fine		$ 50
SED imposed maximum fine		16,800
PSEP disallowed capital expenditures		$ 47,000	$ 507,000	$ 407,000
Number Of Acres Burned		245,000
Number Of Fires		21
Final Number Of Fatalities		44
Pacific Gas And Electric Company [Member]
Loss Contingencies [Line Items]
PSEP disallowed capital expenditures		$ 47,000	507,000	407,000
Utility [Member]
Loss Contingencies [Line Items]
Accrued legal liabilities		86,000	45,000
Butte Fire [Member]
Loss Contingencies [Line Items]
Loss Contingency Range Of Possible Loss Minimum		1,100,000
Legal expenses related to Butte Fire		$ 60,000
Number Of Structures Burned By Fire		44
Vegetation Management Contractors		2
Total Insurance Coverage		$ 922,000
SED proposed an additional fine to the Utility		$ 8,300
Number Of Homes Burned By Fire		549
Number Of Households Represented In Court		2,030
Number of Master Complaints		2
Number Of Outbuildings Burned By Fire		368
Number of plaintiffs		3,770
Number Of Fatalities Caused By Fire		2
Number Of Commerical Properties Burned By Fire		4
Number Of Complaints Filed		77
Fire Fighting Costs Recovery Requested		$ 87,000
Number Of Acres Burned		70,868
Cumulative Legal Expenses		$ 87,000
Number Of Safety And Enforcement Division Citations		2
Previous Loss Contingency Range Of Possible Loss Minimum		$ 750,000
Number Of Moving Households		1,000
Insurance Recoveries	$ 75,000	$ 53,000
Northern California Wild Fire [Member]
Loss Contingencies [Line Items]
Number Of Structures Burned By Fire		8,900
Total Insurance Coverage		$ 800,000
Number Of Fatalities Caused By Fire		43
Number Of Complaints Filed		3
Number Of Acres Burned		245,000
Lawsuits Filed Against The Utility		111
Number Of Fires		21
Number Of Electric Incident Reports		22
Dollar Amount Requiring Electric Incident Report		$ 50
Number Of Class Action Lawsuits		6
Reinstated Liability Insurance		$ 630,000
Cost To Repair Utility Infrastructure		$ 219,000
Final Number Of Fatalities		44
Capital Expenditure Required To Repair Infrastructure		$ 97,000
Total Number of California fire related insurance claims		45,000
Number Of Insurance Related Claims For Homes		21,000
Number Of Insurance Related Claims For Business		3,200
Number Of Insurance Related Claims For Vehicles		6,100
Number Of Derivative Lawsuits		2
Claims For October Wildfires		$ 10,000,000
Total Claims for California Wildfires		11,790,000
Maximum [Member]
Loss Contingencies [Line Items]
Safety And Enforcement Division Maximum Statutory Penalty Per Violation		50
Ex Parte Communications [Member]
Loss Contingencies [Line Items]
Cummulative payments for San Bruno settlements		6,000
Payment To State General Fund		12,000
Initial Payment To California General Fund		1,000
Payment To City Of San Carlos		6,000
Revenue Requirement Reduction In Next GRC Cycle		10,000
2018 GT&S Revenue Requirement Reduction		31,750
2019 GT&S Revenue Requirement Reduction		31,750
Insurance Receivable [Member] | Butte Fire [Member]
Loss Contingencies [Line Items]
Balance at December 31, 2016	$ 596,000	575,000	0
Accrued Insurance Recoveries		297,000	625,000
Reimbursements		(276,000)	(50,000)
Balance at December 31, 2017		596,000	$ 575,000	$ 0
Potential Safety Citation [Member]
Loss Contingencies [Line Items]
SED Administrative Limit per Safety Citation		8,000
Pipeline Safety Enhancement Plan [Member]
Loss Contingencies [Line Items]
CPUC authorized recovery		766,000
Capitalized PSEP costs		1,380,000
Pipeline Safety Enhancement Plan Charges		665,000
2015-2018 [Member]
Loss Contingencies [Line Items]
GT&S Capital Dissallowance		85,000
2011-2014 [Member]
Loss Contingencies [Line Items]
GT&S Capital Dissallowance		134,000
Permanently Disallowed Capital		120,000
Amount Subject To Audit		576,000
Disallowance Of Plant Costs [Member]
Loss Contingencies [Line Items]
Cancelled Capital Project Costs		24,000
Disallowed License Renewal Costs		$ 23,000
Percentage of recoverable costs prior to June 30, 2016		100.00%
Percentage of recoverable costs after June 30, 2016		25.00%
Settlement Agreement Length		8 years
Recoverable Costs From Customers		$ 18,600
Total License Renewal Project Cost		53,000
Office Of Emergency Services [Member] | Butte Fire [Member]
Loss Contingencies [Line Items]
Total Amount To Repair Facilities		190,000
County Of Calaveras [Member] | Butte Fire [Member]
Loss Contingencies [Line Items]
Total Amount To Repair Facilities		$ 85,000
Santa Rosa Investigations [Member] | Northern California Wild Fire [Member]
Loss Contingencies [Line Items]
Number Of Homes Burned By Fire		2
Number Of Outbuildings Burned By Fire		1
Number Of Fires		2