Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 899	$ 853
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	639	621
Amortization of Nuclear Fuel	93	89
(Gain) Loss on Disposition of Assets	0	395
Emission Allowances and Renewable Energy Credit Compliance Accrual	65	46
Provision for Deferred Income Taxes and ITC	104	123
Non-Cash Employee Benefit Plan (Credits) Costs	(52)	(5)
Leveraged Lease (Income) Loss, Adjusted for Rents Received and Deferred Taxes	11	(3)
Net (Gain) Loss on Lease Investments	(2)	32
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(1)	(320)
Cost of Removal	(44)	(61)
Net Change in Regulatory Assets and Liabilities	(70)	84
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	5	(189)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	16	77
Accrued Taxes	115	(10)
Margin Deposit	32	392
Other Current Assets and Liabilities	(60)	(299)
Employee Benefit Plan Funding and Related Payments	(6)	(24)
Other	(80)	23
Net Cash Provided By (Used In) Operating Activities	1,664	1,824
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,414)	(1,604)
Purchase of Emissions Allowances and RECs	(50)	(29)
Proceeds from Sale of Available-for-Sale Securities	1,163	966
Investments in Available-for-Sale Securities	(1,184)	(984)
Other	52	29
Net Cash Provided By (Used In) Investing Activities	(1,433)	(1,622)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(750)	(651)
Proceeds from Short-Term Loan	800	0
Proceeds from Issuance of Other Long-term Debt	975	1,500
Redemption of Long-term Debt	(406)	(600)
Cash Dividends Paid on Common Stock	(495)	(475)
Other	(64)	(60)
Net Cash Provided By (Used In) Financing Activities	60	(286)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	291	(84)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	176	199
Cash, Cash Equivalents and Restricted Cash at End of Period	467	115
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	41	25
Interest Paid, Net of Amounts Capitalized	288	256
Accrued Property, Plant and Equipment Expenditures	331	456
Public Service Electric and Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	723	630
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	439	414
Provision for Deferred Income Taxes and ITC	74	10
Non-Cash Employee Benefit Plan (Credits) Costs	(51)	(19)
Cost of Removal	(44)	(61)
Net Change in Regulatory Assets and Liabilities	(70)	84
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	69	75
Fuel, Materials and Supplies	1	(21)
Prepayments	(155)	(194)
Accounts Payable	39	(97)
Accounts Receivable/Payable-Affiliated Companies, net	(5)	0
Other Current Assets and Liabilities	40	27
Employee Benefit Plan Funding and Related Payments	0	(15)
Other	(61)	5
Net Cash Provided By (Used In) Operating Activities	999	838
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,190)	(1,258)
Proceeds from Sale of Available-for-Sale Securities	23	19
Investments in Available-for-Sale Securities	(22)	(17)
Solar Loan Investments	0	(1)
Other	7	4
Net Cash Provided By (Used In) Investing Activities	(1,182)	(1,253)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(362)	(82)
Proceeds from Issuance of Other Long-term Debt	975	750
Redemption of Long-term Debt	0	(250)
Cash Dividends Paid on Common Stock	(175)	0
Other	(11)	(8)
Net Cash Provided By (Used In) Financing Activities	427	410
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	244	(5)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	50	61
Cash, Cash Equivalents and Restricted Cash at End of Period	294	56
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	51	(107)
Interest Paid, Net of Amounts Capitalized	179	168
Accrued Property, Plant and Equipment Expenditures	282	289
PSEG Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	183	256
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	185	189
Amortization of Nuclear Fuel	93	89
(Gain) Loss on Disposition of Assets	0	395
Emission Allowances and Renewable Energy Credit Compliance Accrual	65	46
Provision for Deferred Income Taxes and ITC	7	131
Non-Cash Employee Benefit Plan (Credits) Costs	(3)	9
Interest Accretion on Asset Retirement Obligations	21	20
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(1)	(320)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	5	(189)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	70	90
Margin Deposit	32	392
Accounts Receivable	(14)	49
Accounts Payable	(92)	(88)
Accounts Receivable/Payable-Affiliated Companies, net	131	90
Other Current Assets and Liabilities	4	3
Employee Benefit Plan Funding and Related Payments	(3)	(6)
Other	(57)	(6)
Net Cash Provided By (Used In) Operating Activities	626	1,150
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(218)	(339)
Purchase of Emissions Allowances and RECs	(50)	(29)
Proceeds from Sale of Available-for-Sale Securities	1,077	901
Investments in Available-for-Sale Securities	(1,100)	(921)
Short-Term Loan-Affiliated Company	(45)	348
Other	23	22
Net Cash Provided By (Used In) Investing Activities	(223)	(714)
CASH FLOWS FROM FINANCING ACTIVITIES
Redemption of Long-term Debt	(406)	0
Cash Dividends Paid on Common Stock	0	(250)
Short-Term Loan-Affiliated Company	0	(193)
Other	(1)	(1)
Net Cash Provided By (Used In) Financing Activities	(407)	(444)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(4)	(8)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	21	22
Cash, Cash Equivalents and Restricted Cash at End of Period	17	14
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	3	(10)
Interest Paid, Net of Amounts Capitalized	65	50
Accrued Property, Plant and Equipment Expenditures	$ 49	$ 167