Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Accounts Receivable, allowances	$ 64	$ 68
Common Stock, no par value
Common Stock, authorized	1,000,000,000	1,000,000,000
Common Stock, issued	533,556,660	533,556,660
Treasury Stock, shares	27,651,927	27,582,437
PSE&G [Member]
Accounts Receivable, allowances	$ 64	$ 67
Common Stock, authorized	150,000,000	150,000,000
Common Stock, issued	132,450,344	132,450,344
Common Stock, outstanding	132,450,344	132,450,344