Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 56		$ 56		$ 56
Additions, Charged to cost and expenses	86		90		96
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	90	[1]	90	[1]	96	[1]
Balance at End of Period	52		56		56
Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	8		22		3
Additions, Charged to cost and expenses	9		2		21
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	2		16	[2]	2	[2]
Balance at End of Period	15		8		22
Power [Member] | Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	8		22		3
Additions, Charged to cost and expenses	7		2		21
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	2		16	[2]	2	[2]
Balance at End of Period	13		8		22
PSE&G [Member] | Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	56		56		56
Additions, Charged to cost and expenses	86		90		96
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	90	[1]	90	[1]	96	[1]
Balance at End of Period	$ 52		$ 56		$ 56

[1] Accounts Receivable written off.

[2] Reduced reserve to appropriate level and to remove obsolete inventory.