Pension And OPEB (Schedule Of Pension And OPEB Costs) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	$ (5)	$ 38	$ (11)	$ 76
Pension Benefits [Member] | Power [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	(1)	11
Total Benefit Costs			(3)	22
Pension Benefits [Member] | PSE And G [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	(5)	22
Total Benefit Costs			(10)	45
Pension Benefits [Member] | Other Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	1	5
Total Benefit Costs			2	9
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs	18	23	35	46
OPEB [Member] | Power [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	5	5
Total Benefit Costs			10	11
OPEB [Member] | PSE And G [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	12	17
Total Benefit Costs			23	33
OPEB [Member] | Other Entity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total Benefit Costs Including Effect Of Regulatory Asset	1	1
Total Benefit Costs			$ 2	$ 2