Leases Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Lease Income
Fixed Lease Income	$ 3	$ 6	$ 8	$ 11
Variable Lease Income	8	8	13	12
Total Operating Lease Income	11	14	21	23
PSEG Power [Member]
Operating Lease Income
Fixed Lease Income	0	0	0	0
Variable Lease Income	8	8	13	12
Total Operating Lease Income	8	8	13	12
Energy Holdings
Operating Lease Income
Fixed Lease Income	3	6	8	11
Variable Lease Income	0	0	0	0
Total Operating Lease Income	$ 3	$ 6	$ 8	$ 11