Preferred Stock (Summary Of Issued And Outstanding Preferred Stock) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares
Minimum [Member]
Preferred Stock [Line Items]
Redemption Price | $ / shares	$ 25.75
Maximum [Member]
Preferred Stock [Line Items]
Redemption Price | $ / shares	$ 27.25
Nonredeemable Preferred Stock [Member] | Pacific Gas And Electric Company [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%
Redeemable Preferred Stock [Member] | Pacific Gas And Electric Company [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]
Preferred stock interest rate	4.36%
6.00% Series [Member] | Nonredeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Maximum [Member]
Preferred Stock [Line Items]
Preferred stock interest rate	6.00%
5.00% Series A [Member] | Redeemable Preferred Stock [Member] | Pacific Gas And Electric Company [Member] | Maximum [Member]
Preferred Stock [Line Items]
Preferred stock interest rate	5.00%