Regulatory Assets And Liabilities (Significant 2014 Orders and Pending Filings) (Details) (PSE&G [Member], USD $) In Millions, unless otherwise specified	2 Months Ended		3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Jan. 31, 2015	Feb. 28, 2016	Sep. 30, 2015	Dec. 31, 2014	May 31, 2014	Apr. 18, 2014
Regulatory Assets And Liabilities [Line Items]
Deferred Storm and Property Reserve Deficiency, Noncurrent						$ 240
Deferred Storm Capital Costs approved for future recovery						126
Request for RAC Recovery						86		66
Request for Increased Transmission Revenues						182
Self Implementing Bill Credit per therm	0.25
Self Implementing BGSS rate credit to residential customers	93
Request for WNC carryover deficiency revenues recovery								26
Supplemental Request for WNC Carryover Deficiency Revenues Recovery						45
Current BGSS rate per therm							0.54
Proposed BGSS rate per therm							0.45
Approved CIP II revenues recovery						28
Approved SBC and NGC revenue recovery							400
True-up adjustment for Transmission Formula Rate Revenues						5
Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Self Implementing Bill Credit per therm			0.28
BGSS Revenue Reduction		100	160		112
Public Utilities, Requested Rate Increase (Decrease), Amount				1.1
Proposed Recovery of costs for Electric Green Energy Program					111
Proposed Recovery of costs for Gas Green Energy Programs					$ 18