Debt and Credit Facilities (Fair Value of Debt) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term Debt		$ 16,036
Long-term Debt, Carrying Value		15,919	$ 16,180
Long-term Debt, Fair Value	[1]	17,546	19,143
PSEG [Member]
Debt Instrument [Line Items]
Long-term Debt		4,146	2,946
Long-term Debt, Carrying Value		4,124	2,929
Long-term Debt, Fair Value	[1]	4,172	3,092
Public Service Electric and Gas Company
Debt Instrument [Line Items]
Long-term Debt		11,890	10,999
Long-term Debt, Carrying Value		11,795	10,909
Long-term Debt, Fair Value	[1]	13,374	13,372
PSEG Power LLC [Member]
Debt Instrument [Line Items]
Long-term Debt		0	2,348
Long-term Debt, Carrying Value		0	2,342	[2]
Long-term Debt, Fair Value	[1]	$ 0	$ 2,679

[1] Given that these bonds do not trade actively, the fair value amounts of taxable debt securities (primarily Level 2 measurements) are generally determined by a valuation model that is based on a conventional discounted cash flow methodology. The fair value amounts above do not represent the price at which the outstanding debt may be called for redemption by each issuer under their respective debt agreements.

[2] In October 2021, PSEG redeemed all of PSEG Power’s outstanding Senior Notes.