Debt and Credit Facilities (Short-Term Liquidity) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2021
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 4,100
Line of Credit Facility, Amount Outstanding		1,185
Available Liquidity		2,915
Commercial Paper and Loans		$ 3,519	$ 1,063
Commitments of single institution as percentage of total commitments		8.00%
Proceeds from Short-term Debt		$ 2,500	800	$ 0
Repayments of Short-term Debt		300	500	0
Issuance of Long-Term Debt		2,825	2,450	1,900
Collateral Already Posted, Aggregate Fair Value		844	54		$ 343
PSEG [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,500
Line of Credit Facility, Amount Outstanding		1,022
Available Liquidity		478
PSEG [Member] | Senior Notes Zero Point Eight Four Percent Due In Two Thousand Twenty Three
Short-term Debt [Line Items]
Issuance of Long-Term Debt		750
PSEG [Member] | Senior Notes November 2021 issuance
Short-term Debt [Line Items]
Issuance of Long-Term Debt		1,500
Public Service Electric and Gas Company
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		600
Line of Credit Facility, Amount Outstanding		18
Available Liquidity		582
Commercial Paper and Loans		0	100
Issuance of Long-Term Debt		1,325	$ 1,350	$ 1,150
PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		2,000
Line of Credit Facility, Amount Outstanding		145
Available Liquidity		1,855
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Commercial Paper and Loans		$ 1,000
Short-term Debt, Weighted Average Interest Rate, at Point in Time		0.33%
March 2020 Term Loan [Member]
Short-term Debt [Line Items]
Repayments of Short-term Debt		$ 300
August 2021 Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt		1,250
March 2021 Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt		500
May 2021 Loan
Short-term Debt [Line Items]
Proceeds from Short-term Debt		750
Power credit facility
Short-term Debt [Line Items]
Proceeds from Short-term Debt		755
Repayments of Short-term Debt		755
Revolving Credit Facility [Member] | PSEG [Member]
Short-term Debt [Line Items]
Credit Facility Reduction		9
Line of Credit Facility, Maximum Borrowing Capacity	[1]	1,500
Line of Credit Facility, Amount Outstanding	[2]	1,022
Available Liquidity		$ 478
Expiration Date		Mar 2024
Revolving Credit Facility [Member] | Public Service Electric and Gas Company
Short-term Debt [Line Items]
Credit Facility Reduction		$ 4
Line of Credit Facility, Maximum Borrowing Capacity	[3]	600
Line of Credit Facility, Amount Outstanding	[2]	18
Available Liquidity		$ 582
Expiration Date		Mar 2024
Revolving Credit Facility [Member] | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Credit Facility Reduction		$ 12
Line of Credit Facility, Maximum Borrowing Capacity	[4]	1,900
Line of Credit Facility, Amount Outstanding		58
Available Liquidity		$ 1,842
Expiration Date		Mar 2024
Letter of Credit Facilities expiring September 2022 | PSEG Power LLC [Member]
Short-term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	[5]	$ 100
Line of Credit Facility, Amount Outstanding		87
Available Liquidity		$ 13
Expiration Date		Sept 2023

[1] PSEG facilities will be reduced by $9 million in March 2022.

[2] The primary use of PSEG’s and PSE&G’s credit facilities is to support their respective Commercial Paper Programs, under which as of December 31, 2021, PSEG had $1.0 billion outstanding at a weighted average interest rate of 0.33%. PSE&G had no Commercial Paper outstanding as of December 31, 2021.

[3] PSE&G facility will be reduced by $4 million in March 2022

[4] PSEG Power facilities will be reduced by $12 million in March 2022

[5] In December 2021, PSEG Power extended its letter of credit facility for one year from September 2022 to September 2023.