Leases Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating Lease Income
Fixed Lease Income	$ 4	$ 6	$ 12	$ 17
Variable Lease Income	8	7	21	19
Total Operating Lease Income	12	13	33	36
PSEG Power [Member]
Operating Lease Income
Fixed Lease Income	0	0	0	0
Variable Lease Income	8	7	21	19
Total Operating Lease Income	8	7	21	19
Energy Holdings
Operating Lease Income
Fixed Lease Income	4	6	12	17
Variable Lease Income	0	0	0	0
Total Operating Lease Income	$ 4	$ 6	$ 12	$ 17