Income Taxes (Schedule Of Effective Tax Rates) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes [Line Items]
Effective tax rate	32.70%	35.00%	36.20%	38.50%
PSE And G [Member]
Income Taxes [Line Items]
Effective tax rate	35.40%	38.40%	36.10%	39.00%
Power [Member]
Income Taxes [Line Items]
Effective tax rate	50.00%	30.30%	39.50%	37.90%