Leases (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) renewals	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Lessor leases carrying value	$ 307
Public Service Electric and Gas Company
Lessee, Lease, Description [Line Items]
Number of lease renewal terms	5
Operating lease liabilities, current	$ 12	$ 13
PSEG Power LLC [Member]
Lessee, Lease, Description [Line Items]
Number of lease renewal terms | renewals	1
PSEG
Lessee, Lease, Description [Line Items]
Operating lease liabilities, current	$ 33	$ 34
Services | Subsidiaries
Lessee, Lease, Description [Line Items]
Number of lease renewal terms	2
Energy Holdings | Subsidiaries
Lessee, Lease, Description [Line Items]
Lessor leases carrying value	$ 124