Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Accounts Receivable, allowance	$ 77	$ 60
Unbilled Revenues, allowance	$ 3	$ 0
Common Stock, issued	534	534
Common Stock, authorized	1,000	1,000
Treasury Stock, Shares	30	30
Public Service Electric and Gas Company [Member]
Accounts Receivable, allowance	$ 77	$ 60
Unbilled Revenues, allowance	$ 3	$ 0
Common Stock, issued	132	132
Common Stock, outstanding	132	132
Common Stock, authorized	150	150