Leases Operating Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 40
Lessee, Operating Lease, Liability, to be Paid, Year Two	32
Lessee, Operating Lease, Liability, to be Paid, Year Three	26
Lessee, Operating Lease, Liability, to be Paid, Year Four	25
Lessee, Operating Lease, Liability, to be Paid, Year Five	23
Lessee, Operating Lease, Liability, to be Paid, after Year Five	123
Total Minimum Lease Payments	269	$ 366
Public Service Electric and Gas Company
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One	15
Lessee, Operating Lease, Liability, to be Paid, Year Two	12
Lessee, Operating Lease, Liability, to be Paid, Year Three	10
Lessee, Operating Lease, Liability, to be Paid, Year Four	9
Lessee, Operating Lease, Liability, to be Paid, Year Five	8
Lessee, Operating Lease, Liability, to be Paid, after Year Five	63
Total Minimum Lease Payments	117	127
Other Segments
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Year One	25
Lessee, Operating Lease, Liability, to be Paid, Year Two	20
Lessee, Operating Lease, Liability, to be Paid, Year Three	16
Lessee, Operating Lease, Liability, to be Paid, Year Four	16
Lessee, Operating Lease, Liability, to be Paid, Year Five	15
Lessee, Operating Lease, Liability, to be Paid, after Year Five	60
Total Minimum Lease Payments	$ 152	$ 239