Schedule Of Consolidated Debt (Short-Term Liquidity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Short-term Debt [Line Items]
Total Facility	$ 4,300
Usage	445
Available Liquidity	3,855
Commitments of single institution as percentage of total commitments	8.00%
PSEG [Member]
Short-term Debt [Line Items]
Total Facility	1,000
Usage	4
Available Liquidity	996
Power [Member]
Short-term Debt [Line Items]
Total Facility	2,700
Usage	165
Available Liquidity	2,535
PSE&G [Member]
Short-term Debt [Line Items]
Total Facility	600
Usage	276
Available Liquidity	324
5-year Credit Facility, Mar 2017 [Member] | PSEG [Member]
Short-term Debt [Line Items]
Total Facility	500	[1]
Usage	4	[1]
Available Liquidity	496	[1]
Expiration Date	Mar 2017	[1]
5-year Credit Facility, Mar 2017 [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility	1,600	[1]
Usage	65	[1]
Available Liquidity	1,535	[1]
Expiration Date	Mar 2017	[1]
5-year Credit Facility, Apr 2016 [Member] | PSEG [Member]
Short-term Debt [Line Items]
Total Facility	500
Usage	0
Available Liquidity	500
Expiration Date	Apr 2016
5-year Credit Facility, Apr 2016 [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility	1,000
Usage	0
Available Liquidity	1,000
Expiration Date	Apr 2016
5-year Credit Facility, Apr 2016 [Member] | PSE&G [Member]
Short-term Debt [Line Items]
Total Facility	600	[2]
Usage	276	[2]
Available Liquidity	324	[2]
Expiration Date	Apr 2016	[2]
Bilateral Credit Facility [Member] | Power [Member]
Short-term Debt [Line Items]
Total Facility	100	[1]
Usage	100	[1]
Available Liquidity	$ 0	[1]
Expiration Date	Sept 2015	[1]

[1] Includes amounts related to letters of credit outstanding.

[2] Includes amounts related to CP and letters of credit outstanding