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Trust Investments (Proceeds From The Sales Of And The Net Realized Gains On Securities in the NDT and Rabbi Trusts) (Detail) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Schedule of Trust Investments [Line Items]

Net Gains (Losses) on Trust Investments

$ 60

$ (221)

Rabbi Trust [Member]

Schedule of Trust Investments [Line Items]

Proceeds from Sales

65

54

Gross Realized Gains

5

5

Gross Realized Losses

(2)

(1)

Net Realized Gains (Losses)

3

4

Unrealized Gain (Loss) on Equity Securities

0

(5)

Net Gains (Losses) on Trust Investments

3

(1)

PSEG Power [Member]

Schedule of Trust Investments [Line Items]

Net Gains (Losses) on Trust Investments

58

(220)

PSEG Power [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]

Schedule of Trust Investments [Line Items]

Proceeds from Sales

^[1]

597

555

Gross Realized Gains

79

38

Gross Realized Losses

(15)

(34)

Net Realized Gains (Losses)

^[2]

64

4

Unrealized Gain (Loss) on Equity Securities

(7)

(221)

Impairment of Debt Securities

0

^[3]

(3)

Net Gains (Losses) on Trust Investments

$ 57

$ (220)

[1]	Includes activity in accounts related to the liquidation of funds being transitioned within the trust.
[2]	The cost of these securities was determined on the basis of specific identification.
[3]	PSEG Power recognized an impairment of available-for-sale debt securities in 2020. PSEG Power’s policy is to sell all securities that are rated below investment grade.

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