Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 1,574	$ 887	$ 1,679
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,986	1,476	1,214
Amortization of Nuclear Fuel	199	203	213
Renewable Energy Credit Compliance Accrual	103	109	104
Impairment Costs for Early Plant Retirements	0	102	0
Provision for Deferred Income Taxes (Other than Leases) and ITC	(167)	474	685
Non-Cash Employee Benefit Plan Costs	89	127	161
Leveraged Lease Income, Adjusted for Rents Received and Deferred Taxes	(159)	(6)	26
Net (Gain) Loss on Lease Investments	(48)	(92)	0
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	188	183	(143)
Net Change in Regulatory Assets and Liabilities	(188)	(138)	(48)
Cost of Removal	(107)	(131)	(120)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(156)	(26)	(38)
Net Change in Certain Current Assets and Liabilities:
Margin Deposits	(90)	(76)	122
Tax Receivable	65	303	(94)
Accrued Taxes	16	3	(91)
Other Current Assets and Liabilities	(70)	(180)	288
Employee Benefit Plan Funding and Related Payments	(81)	(103)	(109)
Other	11	12	70
Net Cash Provided By (Used In) Operating Activities	3,261	3,311	3,919
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(4,190)	(4,199)	(3,863)
Purchase of Emissions Allowances and RECs	(117)	(99)	(106)
Proceeds from Sale of Available-for-Sale Securities	2,319	824	1,501
Investments in Available-for-Sale Securities	(2,340)	(856)	(1,552)
Other	72	82	78
Net Cash Provided By (Used In) Investing Activities	(4,256)	(4,248)	(3,942)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	154	24	364
Issuance of Long-Term Debt	2,175	2,675	1,350
Redemption of Long-Term Debt	(500)	(824)	(600)
Redemption of Securitization Debt	0	0	(259)
Cash Dividend Paid	(870)	(830)	(789)
Other	(74)	(79)	(51)
Net Cash Provided By (Used In) Financing Activities	885	966	15
Net Increase (Decrease) In Cash and Cash Equivalents	(110)	29	(8)
Cash and Cash Equivalents at Beginning of Period	423	394	402
Cash and Cash Equivalents at End of Period	313	423	394
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(8)	(245)	447
Interest Paid, Net of Amounts Capitalized	377	365	381
Accrued Property, Plant and Equipment Expenditures	722	664	510
PSE&G [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	973	889	787
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	685	565	892
Provision for Deferred Income Taxes (Other than Leases) and ITC	616	658	386
Non-Cash Employee Benefit Plan Costs	50	72	95
Net Change in Regulatory Assets and Liabilities	(188)	(138)	(48)
Cost of Removal	(107)	(131)	(120)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	(106)	(84)	165
Fuel, Materials and Supplies	(13)	(7)	(15)
Prepayments	(35)	22	11
Accounts Payable	1	(29)	45
Accounts Receivable/Payable-Affiliated Companies, net	101	199	0
Other Current Assets and Liabilities	17	8	(29)
Employee Benefit Plan Funding and Related Payments	(68)	(82)	(91)
Other	(87)	(48)	47
Net Cash Provided By (Used In) Operating Activities	1,839	1,894	2,125
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(2,919)	(2,816)	(2,692)
Proceeds from Sale of Available-for-Sale Securities	36	22	21
Investments in Available-for-Sale Securities	(37)	(24)	(22)
Solar Loan Investments	7	14	11
Other	10	15	11
Net Cash Provided By (Used In) Investing Activities	(2,903)	(2,789)	(2,671)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Short-Term Debt	0	(153)	153
Issuance of Long-Term Debt	775	1,275	850
Redemption of Long-Term Debt	0	(271)	(300)
Contributed Capital	150	250	0
Redemption of Securitization Debt	0	0	(259)
Other	(9)	(14)	(10)
Net Cash Provided By (Used In) Financing Activities	916	1,087	434
Net Increase (Decrease) In Cash and Cash Equivalents	(148)	192	(112)
Cash and Cash Equivalents at Beginning of Period	390	198	310
Cash and Cash Equivalents at End of Period	242	390	198
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(104)	(295)	(28)
Interest Paid, Net of Amounts Capitalized	294	273	261
Accrued Property, Plant and Equipment Expenditures	429	420	396
Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	479	18	856
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	1,268	881	291
Amortization of Nuclear Fuel	199	203	213
Renewable Energy Credit Compliance Accrual	103	109	104
Impairment Costs for Early Plant Retirements	0	102	0
Provision for Deferred Income Taxes (Other than Leases) and ITC	(807)	(208)	261
Interest Accretion on Asset Retirement Obligation	30	26	26
Non-Cash Employee Benefit Plan Costs	28	39	48
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	188	183	(143)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(156)	(26)	(38)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	42	31	62
Margin Deposits	(90)	(76)	122
Accounts Receivable	(45)	(71)	63
Accounts Payable	39	(22)	(46)
Accounts Receivable/Payable-Affiliated Companies, net	(2)	6	(84)
Other Current Assets and Liabilities	10	10	(36)
Employee Benefit Plan Funding and Related Payments	(7)	(13)	(11)
Other	47	63	18
Net Cash Provided By (Used In) Operating Activities	1,326	1,255	1,706
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,231)	(1,343)	(1,117)
Purchase of Emissions Allowances and RECs	(117)	(99)	(106)
Proceeds from Sale of Available-for-Sale Securities	2,182	739	1,422
Investments in Available-for-Sale Securities	(2,199)	(766)	(1,455)
Short-Term Loan - Affiliated Company	87	276	221
Other	46	46	34
Net Cash Provided By (Used In) Investing Activities	(1,232)	(1,147)	(1,001)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of Long-Term Debt	0	700	0
Redemption of Long-Term Debt	0	(553)	(300)
Short-Term Loan - Affiliated Company	281	0	0
Cash Dividend Paid	(350)	(250)	(400)
Other	(4)	(6)	(2)
Net Cash Provided By (Used In) Financing Activities	(73)	(109)	(702)
Net Increase (Decrease) In Cash and Cash Equivalents	21	(1)	3
Cash and Cash Equivalents at Beginning of Period	11	12	9
Cash and Cash Equivalents at End of Period	32	11	12
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	77	50	393
Interest Paid, Net of Amounts Capitalized	48	81	116
Accrued Property, Plant and Equipment Expenditures	$ 293	$ 244	$ 114