Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 1,256	$ 1,239
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	928	854
Amortization of Nuclear Fuel	137	143
Loss on Asset Dispositions	402	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	80	74
Provision for Deferred Income Taxes and ITC	139	510
Non-Cash Employee Benefit Plan (Credits) Costs	(26)	52
Leveraged Lease (Income) Loss, Adjusted for Rents Received and Deferred Taxes	(8)	(27)
Net (Gain) Loss on Lease Investments	32	14
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(201)	78
Cost of Removal	(87)	(121)
Net Change in Regulatory Assets and Liabilities	54	(35)
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(195)	(62)
Net Change in Certain Current Assets and Liabilities:
Tax Receivable	77	(98)
Accrued Taxes	(11)	(12)
Margin Deposit	301	(77)
Other Current Assets and Liabilities	(155)	12
Employee Benefit Plan Funding and Related Payments	(33)	(85)
Other	19	33
Net Cash Provided By (Used In) Operating Activities	2,709	2,492
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(2,383)	(3,028)
Purchase of Emissions Allowances and RECs	(73)	(111)
Proceeds from Sale of Available-for-Sale Securities	1,374	1,085
Investments in Available-for-Sale Securities	(1,402)	(1,100)
Other	125	41
Net Cash Provided By (Used In) Investing Activities	(2,359)	(3,113)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(670)	(123)
Proceeds from Issuance of Other Long-term Debt	1,900	2,050
Redemption of Long-term Debt	(850)	(750)
Cash Dividends Paid on Common Stock	(713)	(682)
Other	(60)	(83)
Net Cash Provided By (Used In) Financing Activities	(393)	412
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	(43)	(209)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	199	315
Cash, Cash Equivalents and Restricted Cash at End of Period	156	106
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	31	64
Interest Paid, Net of Amounts Capitalized	345	292
Accrued Property, Plant and Equipment Expenditures	514	543
Public Service Electric and Gas Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	974	828
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	620	569
Provision for Deferred Income Taxes and ITC	10	330
Non-Cash Employee Benefit Plan (Credits) Costs	(39)	28
Cost of Removal	(87)	(121)
Net Change in Regulatory Assets and Liabilities	54	(35)
Net Change in Certain Current Assets and Liabilities:
Accounts Receivable and Unbilled Revenues	105	184
Fuel, Materials and Supplies	(16)	(3)
Prepayments	(97)	(73)
Accounts Payable	(77)	(7)
Accounts Receivable/Payable-Affiliated Companies, net	8	(232)
Other Current Assets and Liabilities	66	10
Employee Benefit Plan Funding and Related Payments	(19)	(73)
Other	(21)	(8)
Net Cash Provided By (Used In) Operating Activities	1,481	1,397
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(1,866)	(2,213)
Proceeds from Sale of Available-for-Sale Securities	27	15
Investments in Available-for-Sale Securities	(25)	(17)
Solar Loan Investments	2	(15)
Other	7	6
Net Cash Provided By (Used In) Investing Activities	(1,855)	(2,224)
CASH FLOWS FROM FINANCING ACTIVITIES
Net Change in Commercial Paper and Loans	(262)	40
Proceeds from Issuance of Other Long-term Debt	1,150	1,350
Redemption of Long-term Debt	(500)	(750)
Other	(14)	(14)
Net Cash Provided By (Used In) Financing Activities	374	626
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	0	(201)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	61	244
Cash, Cash Equivalents and Restricted Cash at End of Period	61	43
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(82)	60
Interest Paid, Net of Amounts Capitalized	240	223
Accrued Property, Plant and Equipment Expenditures	348	375
PSEG Power [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	309	400
Adjustments to Reconcile Net Income to Net Cash Flows from Operating Activities:
Depreciation and Amortization	282	260
Amortization of Nuclear Fuel	137	143
Loss on Asset Dispositions	402	0
Emission Allowances and Renewable Energy Credit Compliance Accrual	80	74
Provision for Deferred Income Taxes and ITC	157	177
Non-Cash Employee Benefit Plan (Credits) Costs	7	17
Interest Accretion on Asset Retirement Obligations	30	31
Net Realized and Unrealized (Gains) Losses on Energy Contracts and Other Derivatives	(201)	78
Net Realized (Gains) Losses and (Income) Expense from NDT Fund	(195)	(62)
Net Change in Certain Current Assets and Liabilities:
Fuel, Materials and Supplies	(29)	(50)
Margin Deposit	301	(77)
Accounts Receivable	48	42
Accounts Payable	(62)	(22)
Accounts Receivable/Payable-Affiliated Companies, net	80	65
Other Current Assets and Liabilities	20	(11)
Employee Benefit Plan Funding and Related Payments	(9)	(7)
Other	5	(53)
Net Cash Provided By (Used In) Operating Activities	1,362	1,005
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to Property, Plant and Equipment	(507)	(800)
Purchase of Emissions Allowances and RECs	(73)	(111)
Proceeds from Sale of Available-for-Sale Securities	1,277	1,024
Investments in Available-for-Sale Securities	(1,306)	(1,037)
Short-Term Loan-Affiliated Company	86	119
Other	110	33
Net Cash Provided By (Used In) Investing Activities	(585)	(1,010)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Issuance of Other Long-term Debt	0	700
Cash Dividends Paid on Common Stock	(525)	(400)
Short-Term Loan-Affiliated Company	(193)	(281)
Other	(1)	(5)
Net Cash Provided By (Used In) Financing Activities	(719)	14
Net Increase (Decrease) In Cash, Cash Equivalents and Restricted Cash	58	9
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	22	32
Cash, Cash Equivalents and Restricted Cash at End of Period	80	41
Supplemental Disclosure of Cash Flow Information:
Income Taxes Paid (Received)	(37)	31
Interest Paid, Net of Amounts Capitalized	60	32
Accrued Property, Plant and Equipment Expenditures	$ 166	$ 168