Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 853	$ 827
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	621	560
Amortization of Nuclear Fuel	89	95
Loss on Asset Dispositions	395	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	46	46
Provision for Deferred Income Taxes and ITC	123	213
Non-Cash Employee Benefit Plan (Credits) Costs	(5)	35
Leveraged Lease (Income) Loss, Adjusted for Rents Received and Deferred Taxes	(3)	8
Net (Gain) Loss on Lease Investments	32	14
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(320)	(54)
Net Change in Regulatory Assets and Liabilities	84	(58)
Cost of Removal	(61)	(84)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(189)	(8)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	77	16
Accrued Taxes	(10)	57
Margin Deposit	392	24
Other Current Assets and Liabilities	(299)	2
Employee Benefit Plan Funding and Related Payments	(24)	(58)
Other	23	(2)
Net Cash Provided By (Used In) Operating Activities	1,824	1,633
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,604)	(2,005)
Purchase of Emissions Allowances and RECs	(29)	(44)
Proceeds from Sale of Available-for-Sale Securities	966	821
Investments in Available-for-Sale Securities	(984)	(829)
Other	29	30
Net Cash Provided By (Used In) Investing Activities	(1,622)	(2,027)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(651)	(272)
Proceeds from Issuance of Other Long-term Debt	1,500	1,400
Redemption of Long-term Debt	600	400
Cash Dividends Paid on Common Stock	(475)	(455)
Other	(60)	(83)
Net Cash Provided By (Used In) Financing Activities	(286)	190
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(84)	(204)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	199	315
Cash, Cash Equivalents and Restricted Cash at End of Period	115	111
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	25	52
Interest Paid, Net of Amounts Capitalized	256	205
Accrued Property, Plant and Equipment Expenditures	456	625
Public Service Electric and Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	630	550
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	414	377
Provision for Deferred Income Taxes and ITC	10	160
Non-Cash Employee Benefit Plan (Credits) Costs	(19)	19
Net Change in Regulatory Assets and Liabilities	84	(58)
Cost of Removal	(61)	(84)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	75	195
Fuel, Materials and Supplies	(21)	2
Prepayments	(194)	(161)
Accounts Payable	(97)	(30)
Accounts Receivable/Payable-Affiliated Companies, net	0	(204)
Other Current Assets and Liabilities	27	66
Employee Benefit Plan Funding and Related Payments	(15)	(50)
Other	5	(20)
Net Cash Provided By (Used In) Operating Activities	838	762
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,258)	(1,447)
Proceeds from Sale of Available-for-Sale Securities	19	9
Investments in Available-for-Sale Securities	(17)	(10)
Solar Loan Investments	(1)	(11)
Other	4	3
Net Cash Provided By (Used In) Investing Activities	(1,253)	(1,456)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(82)	195
Proceeds from Issuance of Other Long-term Debt	750	700
Redemption of Long-term Debt	250	400
Other	(8)	(9)
Net Cash Provided By (Used In) Financing Activities	410	486
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(5)	(208)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	61	244
Cash, Cash Equivalents and Restricted Cash at End of Period	56	36
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(107)	97
Interest Paid, Net of Amounts Capitalized	168	157
Accrued Property, Plant and Equipment Expenditures	289	436
PSEG Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	256	275
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	189	166
Amortization of Nuclear Fuel	89	95
Loss on Asset Dispositions	395	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	46	46
Provision for Deferred Income Taxes and ITC	131	51
Interest Accretion on Asset Retirement Obligations	20	20
Non-Cash Employee Benefit Plan (Credits) Costs	9	11
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(320)	(54)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(189)	(8)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	90	71
Margin Deposit	392	24
Accounts Receivable	49	84
Accounts Payable	(88)	(90)
Accounts Receivable/Payable-Affiliated Companies, net	90	227
Other Current Assets and Liabilities	3	(35)
Employee Benefit Plan Funding and Related Payments	(6)	(5)
Other	(6)	(9)
Net Cash Provided By (Used In) Operating Activities	1,150	869
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(339)	(547)
Purchase of Emissions Allowances and RECs	(29)	(44)
Proceeds from Sale of Available-for-Sale Securities	901	785
Investments in Available-for-Sale Securities	(921)	(793)
Short-Term Loan-Affiliated Company	348	519
Other	22	23
Net Cash Provided By (Used In) Investing Activities	(714)	(1,095)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Issuance of Other Long-term Debt	0	700
Short-Term Loan-Affiliated Company	(193)	(281)
Cash Dividends Paid on Common Stock	(250)	(200)
Other	(1)	(5)
Net Cash Provided By (Used In) Financing Activities	(444)	214
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(8)	(12)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	22	32
Cash, Cash Equivalents and Restricted Cash at End of Period	14	20
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(10)	(72)
Interest Paid, Net of Amounts Capitalized	50	18
Accrued Property, Plant and Equipment Expenditures	$ 167	$ 189