Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Long-Term Investments [Line Items]
Total Long-Term Investments	$ 541	$ 536
Dividends in equity method investments	17	15	$ 15
Provision for Loan and Lease Losses	9	26	$ 58
Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments	181	222
Life Insurance And Supplemental Benefits [Member] | Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments	89	100
Solar Loan Investment [Member] | Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments	92	122
Partnerships And Corporate Joint Ventures [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	173	64
Leases [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	$ 187	$ 250