Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
PSE&G [Member] | Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 56		$ 67		$ 78
Additions, Charged to cost and expenses	96		102		99
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	96	[1]	113	[1]	110	[1]
Balance at End of Period	56		56		67
PSEG [Member] | Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	56		68		79
Additions, Charged to cost and expenses	96		102		99
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	96	[1]	114	[1]	110	[1]
Balance at End of Period	56		56		68
PSEG [Member] | Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	3		4		5
Additions, Charged to cost and expenses	21		2		0
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	2	[2]	3	[2]	1	[2]
Balance at End of Period	22		3		4
PSEG [Member] | Other Valuation Allowances [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period					8
Additions, Charged to cost and expenses					0
Additions, Charged to other accounts-describe					0
Deductions-describe					8	[3]
Balance at End of Period					0
Power [Member] | Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	3		4		5
Additions, Charged to cost and expenses	21		2		0
Additions, Charged to other accounts-describe	0		0		0
Deductions-describe	2	[2]	3	[2]	1	[2]
Balance at End of Period	$ 22		$ 3		$ 4

[1] Accounts Receivable written off.

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

[3] Valuation Allowance written off.