Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 206	[1]	$ 60		$ 63
Additions, Charged to cost and expenses	[2]	195		175		87
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[3]	64		37		90
Balance at End of Period		337		206	[1]	60
Allowance For Doubtful Accounts [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period				68
Balance at End of Period						68
Materials And Supplies Valuation Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		10		11		9
Additions, Charged to cost and expenses		3		1		3
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		1	[4]	2	[4]	1
Balance at End of Period		12		10		11
Public Service Electric and Gas Company | Allowance For Doubtful Accounts [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		206	[5]	60		63
Additions, Charged to cost and expenses	[6]	195		175		87
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe	[7]	64		37		90
Balance at End of Period		337		206	[5]	60
Public Service Electric and Gas Company | Allowance For Doubtful Accounts [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period				68
Balance at End of Period						68
Public Service Electric and Gas Company | Materials And Supplies Valuation Reserve [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		2		2		2
Additions, Charged to cost and expenses		2		0		0
Additions, Charged to other accounts-describe		0		0		0
Deductions-describe		1		0		0
Balance at End of Period		$ 3		$ 2		$ 2

[1] Includes $8 million due to the adoption of ASU 2016-13.

[2] For a discussion of bad debt recoveries, see Note 1. Organization, Basis of Presentation and Summary of Significant Accounting Policies.

[3] Accounts Receivable written off.

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

[5] Includes $8 million due to the adoption of ASU 2016-13.

[6] For a discussion of bad debt recoveries, see Note 1. Organization, Basis of Presentation and Summary of Significant Accounting Policies.

[7] Accounts Receivable written off.(C)Reduce reserve to appropriate level and to remove obsolete inventory.