Commitments And Contingencies (Impact Of Penalty Decision) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Impact Of Penalty Decision [Line Items]
Fine payable to the state	$ 100			$ 200
Customer bill credit	400
Charge for disallowed capital	53.0		0
Disallowed revenue for pipeline safety expenses	0	[1]
CPUC estimated cost of other remedies	0	[2]
Total Penalty Decision fines and remedies recorded	553
Total Penalty Decision [Member]
Impact Of Penalty Decision [Line Items]
Fine payable to the state	300	[3]
Customer bill credit	400
Charge for disallowed capital	688.5
Disallowed revenue for pipeline safety expenses	161	[1]
CPUC estimated cost of other remedies	50	[2]
Total Penalty Decision fines and remedies recorded	1,600
Penalty Decision Cumulative Charges [Member]
Impact Of Penalty Decision [Line Items]
Fine payable to the state	300	[3]
Customer bill credit	400
Charge for disallowed capital	53.0	[4]
Disallowed revenue for pipeline safety expenses	0	[1]
CPUC estimated cost of other remedies	20	[2]
Total Penalty Decision fines and remedies recorded	773
Penalty Decision Anticipated Future Financial Impact [Member]
Impact Of Penalty Decision [Line Items]
Fine payable to the state	0	[3]
Customer bill credit	0
Charge for disallowed capital	636.0	[4]
Disallowed revenue for pipeline safety expenses	161	[1]
CPUC estimated cost of other remedies	30	[2]
Total Penalty Decision fines and remedies recorded	827
Pacific Gas And Electric Company [Member]
Impact Of Penalty Decision [Line Items]
Charge for disallowed capital	$ 53.0		$ 0

[1] These costs are being expensed as incurred. Future GT&S revenues will be reduced for these unrecovered expenses.

[2] In the Penalty Decision, the CPUC estimates that the Utility would incur $50 million to comply with the other remedies in the Penalty Decision, including $30 million to reimburse the CPUC for the costs of future audits. Remedial costs are expensed as incurred. Other than the refund of CPUC audit costs, the majority of the remedies have been completed or are underway and the associated costs have already been incurred.

[3] The Utility increased its accrual from $200 million at December 31, 2014 to $300 million at March 31, 2015.

[4] The Penalty Decision prohibits the Utility from recovering certain expenses and capital spending associated with pipeline safety-related projects and programs that the CPUC will identify in the final decision to be issued in the Utility’s 2015 GT&S rate case. The Utility estimates that approximately $53 million of capital spending in the three months ended March 31, 2015 is probable of disallowance, subject to adjustment based on the final 2015 GT&S rate case decision.