Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 471	$ 899
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	663	639
Amortization of Nuclear Fuel	94	93
(Gains) Losses on Asset Dispositions and Impairments	457	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	82	65
Provision for Deferred Income Taxes and ITC	(205)	104
Non-Cash Employee Benefit Plan (Credits) Costs	(89)	(52)
Leveraged Lease (Income), (Gains) and Losses, Adjusted for Rents Received and Deferred Taxes	6	9
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	331	(1)
Cost of Removal	(60)	(44)
Net Change in Regulatory Assets and Liabilities	(24)	(70)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(158)	5
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	56	16
Accrued Taxes	30	115
Margin Deposit	(289)	32
Prepayments	(200)	(158)
Other Current Assets and Liabilities	(121)	98
Employee Benefit Plan Funding and Related Payments	(8)	(6)
Other	13	(80)
Net Cash Provided By (Used In) Operating Activities	1,049	1,664
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,303)	(1,414)
Purchase of Emissions Allowances and RECs	(34)	(50)
Proceeds from Sale of Available-for-Sale Securities	1,229	1,163
Investments in Available-for-Sale Securities	(1,223)	(1,184)
Proceeds from Sales of Long-Lived Assets and Lease Investments	565	0
Other	(27)	52
Net Cash Provided By (Used In) Investing Activities	(793)	(1,433)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(563)	(750)
Proceeds from Short-Term Loan	1,250	800
Repayments of Short-term Debt	(300)	0
Proceeds from Issuance of Other Long-term Debt	900	975
Redemption of Long-term Debt	(1,384)	(406)
Cash Dividends Paid on Common Stock	(516)	(495)
Other	(71)	(64)
Net Cash Provided By (Used In) Financing Activities	(684)	60
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(428)	291
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	572	176
Cash, Cash Equivalents and Restricted Cash at End of Period	144	467
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	143	41
Interest Paid, Net of Amounts Capitalized	279	288
Accrued Property, Plant and Equipment Expenditures	309	331
Public Service Electric and Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	786	723
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	472	439
Provision for Deferred Income Taxes and ITC	63	74
Non-Cash Employee Benefit Plan (Credits) Costs	(78)	(51)
Cost of Removal	(60)	(44)
Net Change in Regulatory Assets and Liabilities	(24)	(70)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	35	69
Fuel, Materials and Supplies	(10)	1
Prepayments	(190)	(155)
Accounts Payable	(62)	39
Accounts Receivable/Payable-Affiliated Companies, net	(138)	(5)
Other Current Assets and Liabilities	(65)	40
Employee Benefit Plan Funding and Related Payments	(1)	0
Other	(48)	(61)
Net Cash Provided By (Used In) Operating Activities	680	999
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,219)	(1,190)
Proceeds from Sale of Available-for-Sale Securities	21	23
Investments in Available-for-Sale Securities	(15)	(22)
Solar Loan Investments	12	0
Other	7	7
Net Cash Provided By (Used In) Investing Activities	(1,194)	(1,182)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(100)	(362)
Proceeds from Issuance of Other Long-term Debt	900	975
Redemption of Long-term Debt	(434)	0
Cash Dividends Paid on Common Stock	0	(175)
Other	(8)	(11)
Net Cash Provided By (Used In) Financing Activities	358	427
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(156)	244
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	233	50
Cash, Cash Equivalents and Restricted Cash at End of Period	77	294
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	150	51
Interest Paid, Net of Amounts Capitalized	190	179
Accrued Property, Plant and Equipment Expenditures	240	282
PSEG Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	(322)	183
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	175	185
Amortization of Nuclear Fuel	94	93
(Gains) Losses on Asset Dispositions and Impairments	457	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	82	65
Provision for Deferred Income Taxes and ITC	(328)	7
Non-Cash Employee Benefit Plan (Credits) Costs	(10)	(3)
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	331	(1)
Interest Accretion on Asset Retirement Obligations	22	21
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(158)	5
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	68	70
Margin Deposit	(289)	32
Accounts Receivable	(10)	(14)
Accounts Payable	(39)	(92)
Accounts Receivable/Payable-Affiliated Companies, net	300	131
Other Current Assets and Liabilities	(11)	4
Employee Benefit Plan Funding and Related Payments	(4)	(3)
Other	(4)	(57)
Net Cash Provided By (Used In) Operating Activities	354	626
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(82)	(218)
Purchase of Emissions Allowances and RECs	(34)	(50)
Proceeds from Sale of Available-for-Sale Securities	1,156	1,077
Investments in Available-for-Sale Securities	(1,163)	(1,100)
Proceeds from Sales of Long-Lived Assets and Lease Investments	565	0
Short-Term Loan-Affiliated Company	(161)	(45)
Other	22	23
Net Cash Provided By (Used In) Investing Activities	625	(223)
CASH FLOWS FROM FINANCING ACTIVITIES
Redemption of Long-term Debt	(950)	(406)
Short-Term Loan-Affiliated Company	121	0
Cash Dividends Paid on Common Stock	(175)	0
Other	0	(1)
Net Cash Provided By (Used In) Financing Activities	(1,004)	(407)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(25)	(4)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	27	21
Cash, Cash Equivalents and Restricted Cash at End of Period	2	17
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	21	3
Interest Paid, Net of Amounts Capitalized	52	65
Accrued Property, Plant and Equipment Expenditures	$ 69	$ 49