Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Accounts Receivable,allowances	$ 59	$ 68
Common Stock, issued	533,556,660	533,556,660
Common Stock, authorized	1,000,000,000	1,000,000,000
Treasury Stock, Shares	29,041,983	28,690,488
PSE&G [Member]
Accounts Receivable,allowances	$ 59	$ 68
Common Stock, issued	132,450,344	132,450,344
Common Stock, authorized	150,000,000	150,000,000