Preferred Stock (Summary Of Issued And Outstanding Preferred Stock) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Nonredeemable Preferred Stock [Member] | Utility [Member]
Preferred Stock [Line Items]
Nonredeemable preferred stock, value	145
Nonredeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Minimum [Member]
Preferred Stock [Line Items]
Preferred stock interest rate	5.00%
Nonredeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Maximum [Member]
Preferred Stock [Line Items]
Preferred stock interest rate	6.00%
Redeemable Preferred Stock [Member] | Utility [Member]
Preferred Stock [Line Items]
Redeemable preferred stock, value	113
Redeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Minimum [Member]
Preferred Stock [Line Items]
Redemption Price	25.75
Preferred stock interest rate	4.36%
Redeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Maximum [Member]
Preferred Stock [Line Items]
Redemption Price	27.25
Preferred stock interest rate	5.00%