New And Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Public Utility, Property, Plant and Equipment [Line Items]
Decrease to cash flow from financing activities	$ (90,000)	$ (13,000)
Pacific Gas And Electric Company [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Decrease to cash flow from financing activities	$ (87,000)	(11,000)
New Accounting Pronouncement [Member]
Public Utility, Property, Plant and Equipment [Line Items]
Decrease to cash flow from financing activities		$ 32,600