Trust Investments - Schedule of Value of Securities in an Unrealized Loss Position for Less Than and Greater Than 12 Months (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		$ 613	$ 188
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		(36)	(6)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		635	793
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,		(124)	(118)
Nuclear Decommissioning Trust (NDT) Fund [Member] | Equity Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	199	79
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	(27)	(5)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[1]	26	32
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[1]	(11)	(8)
Nuclear Decommissioning Trust (NDT) Fund [Member] | Total Debt Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		414	109
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		(9)	(1)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		609	761
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,		(113)	(110)
Nuclear Decommissioning Trust (NDT) Fund [Member] | Domestic Equity Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	73	44
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	(8)	(1)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[1]	4	4
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[1]	(1)	0
Nuclear Decommissioning Trust (NDT) Fund [Member] | International Equity Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	126	35
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[1]	(19)	(4)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[1]	22	28
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[1]	(10)	(8)
Nuclear Decommissioning Trust (NDT) Fund [Member] | Government Debt Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[2]	295	90
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[2]	(7)	(1)
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[2]	382	432
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[2]	(84)	(71)
Nuclear Decommissioning Trust (NDT) Fund [Member] | Corporate Debt Obligations [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[3]	119	19
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[3]	(2)	0
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[3]	227	329
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[3]	(29)	(39)
Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		21	6
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		0	0
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		120	143
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,		(33)	(29)
Rabbi Trust [Member] | Total Debt Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		21	6
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months		0	0
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer		120	143
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,		(33)	(29)
Rabbi Trust [Member] | Government Debt Securities [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[4]	10	3
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[4]	0	0
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[4]	71	83
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[4]	(22)	(19)
Rabbi Trust [Member] | Corporate Debt Obligations [Member]
Schedule of Trust Investments [Line Items]
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[5]	11	3
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	[5]	0	0
Fair Value of Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	[5]	49	60
Gross Unrealized Losses on Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer,	[5]	$ (11)	$ (10)

[1] Equity Securities—Investments in marketable equity securities within the NDT Fund are primarily in common stocks within a broad range of industries and sectors. Unrealized gains and losses on these securities are recorded in Net Income.

[2] Debt Securities (Government)—Unrealized gains and losses on these securities are recorded in Accumulated Other Comprehensive Income (Loss). The unrealized losses on PSEG Power’s NDT investments in U.S. Treasury obligations and Federal Agency mortgage-backed securities were caused by interest rate changes. PSEG Power also has investments in municipal bonds. It is not expected that these securities will settle for less than their amortized cost. PSEG Power does not intend to sell these securities nor will it be more-likely-than-not required to sell before recovery of their amortized cost. PSEG Power did not recognize credit losses for U.S. Treasury obligations and Federal Agency mortgage-backed securities because these investments are guaranteed by the U.S. government or an agency of the U.S. government. PSEG Power did not recognize credit losses for municipal bonds because they are primarily investment grade securities.

[3] Debt Securities (Corporate)—Unrealized gains and losses on these securities are recorded in Accumulated Other Comprehensive Income (Loss). Unrealized losses were due to market declines. It is not expected that these securities would settle for less than their amortized cost. PSEG Power does not intend to sell these securities nor will it be more-likely-than-not required to sell before recovery of their amortized cost. PSEG Power did not recognize credit losses for corporate bonds because they are primarily investment grade securities.

[4] Debt Securities (Government)—Unrealized gains and losses on these securities are recorded in Accumulated Other Comprehensive Income (Loss). The unrealized losses on PSEG’s Rabbi Trust investments in U.S. Treasury obligations and Federal Agency mortgage-backed securities were caused by interest rate changes. PSEG also has investments in municipal bonds. It is not expected that these securities will settle for less than their amortized cost. PSEG does not intend to sell these securities nor will it be more-likely-than-not required to sell before recovery of their amortized cost. PSEG did not recognize credit losses for U.S. Treasury obligations and Federal Agency mortgage-backed securities because these investments are guaranteed by the U.S. government or an agency of the U.S. government. PSEG did not recognize credit losses for municipal bonds because they are primarily investment grade securities.

[5] Debt Securities (Corporate)—Unrealized gains and losses on these securities are recorded in Accumulated Other Comprehensive Income (Loss). Unrealized losses were due to market declines. It is not expected that these securities would settle for less than their amortized cost. PSEG does not intend to sell these securities nor will it be more-likely-than-not required to sell before recovery of their amortized cost. PSEG did not recognize credit losses for corporate bonds because they are primarily investment grade.