Commitments and Contingent Liabilities - Environmental Matters - Additional Information (Details) $ in Millions	Mar. 31, 2025 USD ($) Plant
Site Contingency [Line Items]
Number of additional legal entities contacted by EPA in conjunction with Newark Bay study area contamination	21
EPA estimated study costs for Hackensack River	$ 55
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
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	49
Remediation Liability Recorded As Other Noncurrent Liabilities	150
Regulatory assets	199
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	199
Accrual for Environmental Loss Contingencies	$ 199
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accrued Environmental Loss Contingencies, Noncurrent
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

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Number Of Additional Legal Entities Contacted By EPA In Conjunction With Newark Bay Study Area Contamination

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Number of former generating electric station

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Passaic River proposed settlement other PRPs

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