Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts Receivable,allowances	$ 56	$ 56
Long-Term Debt, current, fair value		50
Common Stock, issued	533,556,660	533,556,660
Common Stock, authorized	1,000,000,000	1,000,000,000
Treasury Stock,shares	27,646,288	27,611,374
PSE And G [Member]
Accounts Receivable,allowances	$ 56	$ 56
Common Stock, issued	132,450,344	132,450,344
Common Stock, authorized	150,000,000	150,000,000
Common Stock, outstanding	132,450,344	132,450,344