Leases - Operating Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 35
Lessee, Operating Lease, Liability, to be Paid, Year Two	32
Lessee, Operating Lease, Liability, to be Paid, Year Three	30
Lessee, Operating Lease, Liability, to be Paid, Year Four	27
Lessee, Operating Lease, Liability, to be Paid, Year Five	26
Lessee, Operating Lease, Liability, to be Paid, after Year Five	60
Total Minimum Lease Payments	210	$ 236
Public Service Electric and Gas Company [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid, Year One	19
Lessee, Operating Lease, Liability, to be Paid, Year Two	16
Lessee, Operating Lease, Liability, to be Paid, Year Three	13
Lessee, Operating Lease, Liability, to be Paid, Year Four	11
Lessee, Operating Lease, Liability, to be Paid, Year Five	10
Lessee, Operating Lease, Liability, to be Paid, after Year Five	47
Total Minimum Lease Payments	116	125
Other Segments
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid, Year One	16
Lessee, Operating Lease, Liability, to be Paid, Year Two	16
Lessee, Operating Lease, Liability, to be Paid, Year Three	17
Lessee, Operating Lease, Liability, to be Paid, Year Four	16
Lessee, Operating Lease, Liability, to be Paid, Year Five	16
Lessee, Operating Lease, Liability, to be Paid, after Year Five	13
Total Minimum Lease Payments	$ 94	$ 111