Commitments And Contingent Liabilities (Environmental Matters) (Detail) $ in Millions	Sep. 30, 2023 USD ($) Plant
Site Contingency [Line Items]
Number of additional legal entities contacted by EPA in conjunction with Newark Bay study area contamination	21
Passaic River Site Contingency [Member]
Site Contingency [Line Items]
Estimated Cleanup Costs EPA Preferred Method	$ 2,300
Accrual for Environmental Loss Contingencies	$ 66
Number Of Additional Potentially Responsible Parties Directed By New Jersey Department Of Environmental Protection To Arrange Damage Assessment For Lower Passaic River	56
Passaic River Site Contingency [Member] | Public Service Electric and Gas Company [Member]
Site Contingency [Line Items]
Number of former generating electric station | Plant	1
Accrual for Environmental Loss Contingencies	$ 53
Passaic River Site Contingency [Member] | PSEG Power [Member]
Site Contingency [Line Items]
Accrual for Environmental Loss Contingencies	13
Mgp Remediation Site Contingency [Member] | Public Service Electric and Gas Company [Member]
Site Contingency [Line Items]
Remediation Liability Recorded As Other Current Liabilities	45
Remediation Liability Recorded As Other Noncurrent Liabilities	160
Regulatory Assets	205
Passaic River Site Upper 9 Miles
Site Contingency [Line Items]
Estimated Cleanup Costs EPA Preferred Method	550
Passaic River proposed settlement other PRPs	150
Minimum [Member] | Mgp Remediation Site Contingency [Member] | Public Service Electric and Gas Company [Member]
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss	205
Accrual for Environmental Loss Contingencies	205
Maximum [Member] | Mgp Remediation Site Contingency [Member] | Public Service Electric and Gas Company [Member]
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 224