Commitments And Contingent Liabilities (Face Value Of Outstanding Guarantees, Current Exposure And Margin Positions) (Detail) (Power [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Power [Member]
Face Value of Outstanding Guarantees	$ 1,639	$ 1,508
Exposure under Current Guarantees	246	226
Letters of Credit Margin Posted	132	124
Letters of Credit Margin Received	25	69
Counterparty Cash Margin Deposited	0	15
Counterparty Cash Margin Received	0	(4)
Net Broker Balance Deposited (Received)	80	26
Additional Collateral that could be Required	691	654
Liquidity Available under PSEG's and Power's Credit Facilities to Post Collateral	3,522	3,531
Other Letters of Credit	$ 45	$ 45