Rate Filings (Details) (PSE And G [Member], USD $) In Millions, unless otherwise specified	2 Months Ended				3 Months Ended	12 Months Ended
	Mar. 31, 2014	Sep. 30, 2014	May 31, 2014	Apr. 18, 2014	Jan. 31, 2015 Subsequent Event [Member]	Feb. 28, 2016 Subsequent Event [Member]	Sep. 30, 2015 Subsequent Event [Member]
Regulatory Assets And Liabilities [Line Items]
Deferred Storm O&M Costs Approved for future recovery		$ 240
Deferred Storm Capital Costs Approved for future recovery		126
Request for RAC Recovery				66
Approved WNC Carryover Deficiency Revenues Recovery				26
Request to Refund WNC overrecovery		45
Self Implementing Bill Credit per therm	0.25				0.28
Self Implementing BGSS rate credit to residential customers	93
BGSS Revenue Reduction					160		112
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
Request for Increased Transmission Revenues		182
Requested Annual Rate Increase for Energy Strong						1.6
Proposed Recovery of costs for Electric Green Energy Program							111
Proposed Recovery of costs for Gas Green Energy Programs							$ 18