Leases Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating Lease Income
Fixed Lease Income	$ 5	$ 4	$ 16	$ 12
Variable Lease Income	0	8	12	21
Total Operating Lease Income	5	12	28	33
PSEG Power [Member]
Operating Lease Income
Fixed Lease Income	0	0	0	0
Variable Lease Income	0	8	12	21
Total Operating Lease Income	0	8	12	21
Energy Holdings
Operating Lease Income
Fixed Lease Income	5	4	16	12
Variable Lease Income	0	0	0	0
Total Operating Lease Income	$ 5	$ 4	$ 16	$ 12