Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Millions, $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Accounts Receivable, allowance	$ 232	$ 196
Unbilled Revenues, allowance	$ 7	$ 10
Common Stock, authorized	1,000	1,000
Common Stock, issued	534	534
Treasury Stock, Shares	30	30
Public Service Electric and Gas Company [Member]
Accounts Receivable, allowance	$ 232	$ 196
Unbilled Revenues, allowance	$ 7	$ 10
Common Stock, authorized	150	150
Common Stock, issued	132	132
Common Stock, outstanding	132	132