Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Long-Term Investments [Line Items]
Total Long-Term Investments		$ 536	$ 812
Dividends in equity method investments		15	15	$ 16
Provision for Loan and Lease Losses		26	58	$ 8
PSEG Power LLC
Long-Term Investments [Line Items]
Total Long-Term Investments		64	66
Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments		222	248
Life Insurance And Supplemental Benefits [Member] | Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments		100	111
Solar Loan Investment [Member] | Public Service Electric and Gas Company
Long-Term Investments [Line Items]
Total Long-Term Investments		122	137
Partnerships And Corporate Joint Ventures [Member] | PSEG Power LLC
Long-Term Investments [Line Items]
Total Long-Term Investments	[1]	64	66
Partnerships And Corporate Joint Ventures [Member] | Equity Method Investments [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		0	1
Leases [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments		$ 250	$ 497

[1] During the three years ended December 31, 2020, 2019 and 2018, dividends from these investments were $15 million, $15 million and $16 million, respectively.