Income Taxes (Reconciliation Of Reported Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018	Jun. 30, 2018		Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Net Income	$ 437	[1]	$ 403	$ 153	[2]	$ 700	$ 199	[1]	$ 412	$ 269	[2]	$ 558
Net Income													$ 1,693	$ 1,438	$ 1,574
Federal													84	(97)	86
State													18	83	(31)
Total Current													102	(14)	55
Federal													3	373	(482)
State													132	71	92
Total Deferred													135	444	(390)
Investment tax credit													20	(13)	29
Total Income Tax													257	417	(306)
Pre-Tax Income													1,950	1,855	1,268
Tax Computed at Statutory Rate													410	390	444
State Income Taxes (net of federal income tax)													117	123	36
Uncertain Tax Positions													0	(24)	(3)
Manufacturing Deduction													0	0	(13)
Nuclear Decommissioning Trust													34	(13)	19
Plant-Related Items													(2)	(10)	(23)
Tax Credits													(18)	(16)	(22)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount													0	0	6
Tax Adjustment Credit													(272)	(30)	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount													0	3	(755)
Other													(12)	(6)	5
Sub-Total													(153)	27	(750)
Income Tax Provision													$ 257	$ 417	$ (306)
Effective income tax rate													13.20%	22.50%	(24.10%)
Public Service Electric and Gas Company
Income Taxes [Line Items]
Net Income	276		344	227		403	239		278	231		319
Net Income													$ 1,250	$ 1,067	$ 973
Federal													121	(62)	(52)
State													0	1	(1)
Total Current													121	(61)	(53)
Federal													(156)	287	492
State													117	122	129
Total Deferred													(39)	409	621
Investment tax credit													11	(4)	(5)
Total Income Tax													93	344	563
Pre-Tax Income													1,343	1,411	1,536
Tax Computed at Statutory Rate													282	296	538
State Income Taxes (net of federal income tax)													92	98	83
Uncertain Tax Positions													1	(1)	(9)
Plant-Related Items													(2)	(10)	(23)
Tax Credits													(8)	(8)	(9)
Tax Adjustment Credit													(272)	(30)	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount													0	0	(10)
Other													0	(1)	(7)
Sub-Total													(189)	48	25
Income Tax Provision													$ 93	$ 344	$ 563
Effective income tax rate													6.90%	24.40%	36.70%
PSEG Power LLC
Income Taxes [Line Items]
Net Income	$ 159	[1]	$ 53	$ (40)	[2]	$ 296	$ (35)	[1]	$ 125	$ 41	[2]	$ 234
Net Income													$ 468	$ 365	$ 479
Federal													(48)	(164)	95
State													3	24	(17)
Total Current													(45)	(140)	78
Federal													208	214	(804)
State													31	1	(37)
Total Deferred													239	215	(841)
Investment tax credit													9	(9)	34
Total Income Tax													203	66	(729)
Pre-Tax Income													671	431	(250)
Tax Computed at Statutory Rate													141	91	(88)
State Income Taxes (net of federal income tax)													25	21	(36)
Uncertain Tax Positions													11	(24)	7
Manufacturing Deduction													0	0	(13)
Nuclear Decommissioning Trust													34	(13)	19
Tax Credits													(10)	(7)	(12)
Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Amount													0	0	1
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount													0	(1)	(610)
Other													2	(1)	3
Sub-Total													62	(25)	(641)
Income Tax Provision													$ 203	$ 66	$ (729)
Effective income tax rate													30.30%	15.30%	291.60%

[1] The increase in Net Income at PSEG consolidated and PSEG Power in the fourth quarter of 2019 as compared to the same quarter in 2018 was primarily due to net gains in 2019 as compared to net losses in 2018 on equity securities in PSEG Power’s NDT Fund.

[2] The decrease in Operating Income and Net Income at PSEG consolidated and PSEG Power in the second quarter of 2019 as compared to the same quarter in 2018 was primarily due to the loss in 2019 related to the sale of PSEG Power’s ownership interests in the Keystone and Conemaugh fossil generation plants, offsetting MTM net gains in 2019 as compared to net losses in 2018.