Other Income And Deductions (Schedule Of Other Income) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of Other Income [Roll Forward]
NDT Fund Gains, Interest, Dividend and Other Income		$ 202	$ 96	$ 138
Allowance for Funds Used During Construction		56	49	48
Rabbi Trust Gains Interest Dividend and Other Income		24	12	10
Solar Loan Interest		21	22	23
Gain on Insurance Recovery				28
Other		16	12	7
Total Other Income		319	191	254
PSE&G [Member]
Components of Other Income [Roll Forward]
NDT Fund Gains, Interest, Dividend and Other Income		0	0	0
Allowance for Funds Used During Construction		56	49	48
Rabbi Trust Gains Interest Dividend and Other Income		5	3	2
Solar Loan Interest		21	22	23
Gain on Insurance Recovery				0
Other		10	9	6
Total Other Income		92	83	79
Power [Member]
Components of Other Income [Roll Forward]
NDT Fund Gains, Interest, Dividend and Other Income		202	96	138
Allowance for Funds Used During Construction		0	0	0
Rabbi Trust Gains Interest Dividend and Other Income		6	3	2
Solar Loan Interest		0	0	0
Gain on Insurance Recovery				28
Other		5	3	1
Total Other Income		213	102	169
Other [Member]
Components of Other Income [Roll Forward]
NDT Fund Gains, Interest, Dividend and Other Income	[1]	0	0	0
Allowance for Funds Used During Construction	[1]	0	0	0
Rabbi Trust Gains Interest Dividend and Other Income	[1]	13	6	6
Solar Loan Interest	[1]	0	0	0
Gain on Insurance Recovery	[1]			0
Other	[1]	1	0	0
Total Other Income	[1]	$ 14	$ 6	$ 6

[1] Other consists of activity at PSEG (as parent company), Energy Holdings, Services, PSEG LI and intercompany eliminations.