Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 59		$ 68		$ 67
Additions, Charged to cost and expenses		91		76		85
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[1]	87		85		84
Balance at End of Period		63		59		68
Materials And Supplies Valuation Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		7		37		11
Additions, Charged to cost and expenses		4		2		32
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		2	[2]	32	[3]	6	[2]
Balance at End of Period		9		7		37
PSE&G [Member] | Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		59		68		67
Additions, Charged to cost and expenses		91		76		85
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[4]	87		85		84
Balance at End of Period		63		59		68
PSE&G [Member] | Materials And Supplies Valuation Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		0		0		1
Additions, Charged to cost and expenses		2		0		0
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		0		0		1	[5]
Balance at End of Period		2		0		0
Power [Member] | Materials And Supplies Valuation Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		7		37		10
Additions, Charged to cost and expenses		2		2		32
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		2	[6]	32	[7]	5	[6]
Balance at End of Period		$ 7		$ 7		$ 37

[1] Accounts Receivable written off.

[2] Reduce reserve to appropriate level and to remove obsolete inventory.

[3] Hudson and Mercer inventory written off.

[4] Accounts Receivable written off.

[5] Reduce reserve to appropriate level and to remove obsolete inventory.

[6] Reduce reserve to appropriate level and to remove obsolete inventory.

[7] Hudson and Mercer inventory written off.