Earnings Per Share (EPS) And Dividends (Basic And Diluted Earnings Per Share Computation) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Continuing Operations									$ 1,243	$ 1,275	$ 1,407
Income (Loss) on Discontinued Operations, net of tax									0	0	96
Net Income									1,243	1,275	1,503
Effect of Stock Based Compensation Awards, Basic									0	0	0
Total Shares, Basic	506,000,000	506,000,000	506,000,000	506,000,000	506,000,000	506,000,000	506,000,000	506,000,000	505,889,000	505,933,000	505,949,000
Continuing Operations, Basic									$ 2.46	$ 2.52	$ 2.78
Net Income, Basic	$ 0.40	$ 0.77	$ 0.66	$ 0.63	$ 0.44	$ 0.69	$ 0.42	$ 0.97	$ 2.46	$ 2.52	$ 2.97
Effect of Stock Based Compensation Awards, Diluted									1,636,000	1,153,000	1,033,000
Total Shares, Diluted	508,000,000	508,000,000	507,000,000	507,000,000	507,000,000	507,000,000	507,000,000	507,000,000	507,525,000	507,086,000	506,982,000
Continuing Operations, Diluted									$ 2.45	$ 2.51	$ 2.77
Net Income, Diluted	$ 0.39	$ 0.77	$ 0.66	$ 0.63	$ 0.44	$ 0.68	$ 0.42	$ 0.97	$ 2.45	$ 2.51	$ 2.96
Weighted Average Common Shares Outstanding Before Various Effects Basic									505,889,000	505,933,000	505,949,000
Weighted Average Common Shares Outstanding Before Various Effects Diluted									505,889,000	505,933,000	505,949,000
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share									$ 0.00	$ 0.00	$ 0.19
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share									$ 0.00	$ 0.00	$ 0.19
Stock Options Excluded from Weighted Average Common Shares used for diluted EPS									1,600,000	1,800,000	1,800,000
PSEG [Member]
Continuing Operations									$ 1,243	$ 1,275	$ 1,407