Leases Operating Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Lease Costs
Long-term Lease Costs	$ 50	$ 54	$ 52
Short-term Lease Costs	42	45	24
Variable Lease Costs	20	31	22
Total Operating Lease Costs	112	130	98
Cash Paid for Amounts Included in the Measurement of Operating Lease Liabilities	$ 43	$ 45	$ 42
Weighted Average Remaining Lease Term in Years	9 years	11 years	12 years
Weighted Average Discount Rate	3.80%	4.00%	4.10%
Public Service Electric and Gas Company
Operating Lease Costs
Long-term Lease Costs	$ 24	$ 26	$ 24
Short-term Lease Costs	36	38	14
Variable Lease Costs	2	2	2
Total Operating Lease Costs	62	66	40
Cash Paid for Amounts Included in the Measurement of Operating Lease Liabilities	$ 17	$ 17	$ 16
Weighted Average Remaining Lease Term in Years	12 years	12 years	13 years
Weighted Average Discount Rate	3.40%	3.50%	3.60%
Other Segments
Operating Lease Costs
Long-term Lease Costs	$ 26	$ 28	$ 28
Short-term Lease Costs	6	7	10
Variable Lease Costs	18	29	20
Total Operating Lease Costs	50	64	58
Cash Paid for Amounts Included in the Measurement of Operating Lease Liabilities	$ 26	$ 28	$ 26
Weighted Average Remaining Lease Term in Years	8 years	11 years	11 years
Weighted Average Discount Rate	4.10%	4.30%	4.30%