Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 448	$ 700
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	324	314
Amortization of Nuclear Fuel	47	47
Emission Allowances and Renewable Energy Credit Compliance Accrual	33	24
Provision for Deferred Income Taxes and ITC	18	102
Non-Cash Employee Benefit Plan (Credits) Costs	(26)	(3)
Leveraged Lease (Income) Loss, Adjusted for Rents Received and Deferred Taxes	18	(1)
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(106)	(109)
Cost of Removal	(24)	(30)
Net Change in Regulatory Assets and Liabilities	(80)	69
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	209	(137)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	16	77
Accrued Taxes	71	26
Margin Deposit	55	190
Other Current Assets and Liabilities	120	(67)
Employee Benefit Plan Funding and Related Payments	10	(14)
Other	20	30
Net Cash Provided By (Used In) Operating Activities	1,153	1,218
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(720)	(795)
Purchase of Emissions Allowances and RECs	(29)	(21)
Proceeds from Sale of Available-for-Sale Securities	609	497
Investments in Available-for-Sale Securities	(619)	(507)
Other	35	10
Net Cash Provided By (Used In) Investing Activities	(724)	(816)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(353)	135
Proceeds from Short-Term Loan	300	0
Proceeds from Issuance of Other Long-term Debt	600	0
Redemption of Long-term Debt	0	(350)
Cash Dividends Paid on Common Stock	(248)	(238)
Other	(62)	(52)
Net Cash Provided By (Used In) Financing Activities	237	(505)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	666	(103)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	176	199
Cash, Cash Equivalents and Restricted Cash at End of Period	842	96
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(14)	(76)
Interest Paid, Net of Amounts Capitalized	91	91
Accrued Property, Plant and Equipment Expenditures	378	456
Public Service Electric and Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	440	403
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	222	212
Provision for Deferred Income Taxes and ITC	53	(12)
Non-Cash Employee Benefit Plan (Credits) Costs	(26)	(9)
Cost of Removal	(24)	(30)
Net Change in Regulatory Assets and Liabilities	(80)	69
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	20	(119)
Fuel, Materials and Supplies	0	(5)
Prepayments	12	3
Accounts Payable	(45)	(108)
Accounts Receivable/Payable-Affiliated Companies, net	14	87
Other Current Assets and Liabilities	48	35
Employee Benefit Plan Funding and Related Payments	12	(10)
Other	(11)	4
Net Cash Provided By (Used In) Operating Activities	635	520
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(620)	(625)
Proceeds from Sale of Available-for-Sale Securities	10	10
Investments in Available-for-Sale Securities	(10)	(9)
Solar Loan Investments	2	(5)
Other	2	2
Net Cash Provided By (Used In) Investing Activities	(616)	(627)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(362)	92
Proceeds from Issuance of Other Long-term Debt	600	0
Cash Dividends Paid on Common Stock	(175)	0
Other	(6)	0
Net Cash Provided By (Used In) Financing Activities	57	92
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	76	(15)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	50	61
Cash, Cash Equivalents and Restricted Cash at End of Period	126	46
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	11	(94)
Interest Paid, Net of Amounts Capitalized	74	73
Accrued Property, Plant and Equipment Expenditures	262	273
PSEG Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	13	296
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	94	94
Amortization of Nuclear Fuel	47	47
Emission Allowances and Renewable Energy Credit Compliance Accrual	33	24
Provision for Deferred Income Taxes and ITC	(52)	121
Non-Cash Employee Benefit Plan (Credits) Costs	0	4
Interest Accretion on Asset Retirement Obligations	10	10
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(106)	(109)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	209	(137)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	102	189
Margin Deposit	55	190
Accounts Receivable	20	34
Accounts Payable	(44)	(57)
Accounts Receivable/Payable-Affiliated Companies, net	68	(22)
Other Current Assets and Liabilities	21	37
Employee Benefit Plan Funding and Related Payments	(1)	(3)
Other	15	8
Net Cash Provided By (Used In) Operating Activities	484	726
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(97)	(167)
Purchase of Emissions Allowances and RECs	(29)	(21)
Proceeds from Sale of Available-for-Sale Securities	569	463
Investments in Available-for-Sale Securities	(579)	(475)
Short-Term Loan-Affiliated Company	365	87
Other	11	11
Net Cash Provided By (Used In) Investing Activities	(490)	(276)
CASH FLOWS FROM FINANCING ACTIVITIES
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	(1)	(444)
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(7)	6
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	21	22
Cash, Cash Equivalents and Restricted Cash at End of Period	14	28
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(16)	11
Interest Paid, Net of Amounts Capitalized	7	6
Accrued Property, Plant and Equipment Expenditures	$ 116	$ 183