Other Income And Deductions (Schedule Of Other Deductions) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of Other Deductions [Roll Forward]
NDT Fund Realized Losses and Expenses		$ 32	$ 40	$ 45
Other		59	27	57
Total Other Deductions		91	67	102
PSE&G [Member]
Components of Other Deductions [Roll Forward]
NDT Fund Realized Losses and Expenses		0	0	0
Other		5	4	4
Total Other Deductions		5	4	4
Power [Member]
Components of Other Deductions [Roll Forward]
NDT Fund Realized Losses and Expenses		32	40	45
Other		24	17	27
Total Other Deductions		56	57	72
Other [Member]
Components of Other Deductions [Roll Forward]
NDT Fund Realized Losses and Expenses	[1]	0	0	0
Other	[1]	30	6	26
Total Other Deductions	[1]	$ 30	$ 6	$ 26

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