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Pension, OPEB and Savings Plans (Schedule Of Pension And OPEB Costs) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Pension Benefits [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (82) | $ (28) | $ 11
Total Benefit Costs | (82) | (28) | 11
Pension Benefits [Member] | Public Service Electric and Gas Company |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (64) | (27) | 0
Pension Benefits [Member] | Other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (18) | (1) | 11
Other Benefits [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (96) | (77) | (59)
Total Benefit Costs | (96) | (77) | (59)
Other Benefits [Member] | Public Service Electric and Gas Company |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (92) | (76) | (62)
Other Benefits [Member] | Other [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ (4) | $ (1) | $ 3

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