Long-Term Investments (Schedule Of Long Term Investments) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Long-Term Investments [Line Items]
Pretax gain on REMA restructuring			$ 12.0
Total Long-Term Investments			896.0	$ 932.0
Dividends in equity method investments			16.0	18.0	$ 18.0
Provision for Loan and Lease Losses				7.0	137.0
Financing Receivable, Allowance for Credit Losses, Write-downs			20.0	77.0	$ 147.0
After tax gain on REMA restructuring			9.0
Expected claim proceeds			31.5
REMA Funded credit support			36.0
Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments			86.0	87.0
PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments			270.0	280.0
Life Insurance And Supplemental Benefits [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments			121.0	130.0
Solar Loan Investments [Member] | PSE&G [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments			149.0	150.0
Lease Investments [Member] | Energy Holdings [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments			540.0	565.0
Partnerships And Corporate Joint Ventures [Member] | Power [Member]
Long-Term Investments [Line Items]
Total Long-Term Investments	[1]		$ 86.0	$ 87.0
Subsequent Event [Member]
Long-Term Investments [Line Items]
Expected tax payment for REMA restructuring		$ 120.0

[1] During the three years ended December 31, 2018, 2017 and 2016, dividends from these investments were $16 million, $18 million and $18 million, respectively.