Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 67		$ 52		$ 56
Additions, Charged to cost and expenses		85		101		86
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[1]	84		86		90
Balance at End of Period		68		67		52
Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		11		15		8
Additions, Charged to cost and expenses		32		2		9
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[2]	6		6		2
Balance at End of Period		37		11		15
PSE&G [Member] | Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		67		52		56
Additions, Charged to cost and expenses		85		101		86
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[3]	84		86		90
Balance at End of Period		68		67		52
PSE&G [Member] | Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		1		2		0
Additions, Charged to cost and expenses		0		0		2
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		1	[2]	1	[2]	0
Balance at End of Period		0		1		2
Power [Member] | Materials And Supplies Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		10		13		8
Additions, Charged to cost and expenses		32		2		7
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[4]	5		5		2
Balance at End of Period		$ 37		$ 10		$ 13

[1] Accounts Receivable written off.

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

[3] Accounts Receivable written off.

[4] Reduced reserve to appropriate level and to remove obsolete inventory.