Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts Receivable,allowances	$ 64	$ 56
Common Stock, issued	533,556,660	533,556,660
Common Stock, authorized	1,000,000,000	1,000,000,000
Treasury Stock, Shares	27,692,398	27,664,188
PSE And G [Member]
Accounts Receivable,allowances	$ 64	$ 56
Common Stock, issued	132,450,344	132,450,344
Common Stock, outstanding	132,450,344	132,450,344
Common Stock, authorized	150,000,000	150,000,000
Treasury Stock, Shares	0	0