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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost for benefits earned | $ 106 | $ 99
Interest cost | 252 | 229
Expected return on plan assets | (263) | (253)
Amortization of prior service (credit) | (1) | (1)
Amortization of net actuarial gain | 0 | 0
Net periodic benefit cost | 94 | 74
Regulatory account transfer | (10) | 10
Net periodic benefit cost | 84 | 84
Other Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost for benefits earned | 9 | 10
Interest cost | 18 | 18
Expected return on plan assets | (37) | (35)
Amortization of prior service (credit) | 1 | 1
Amortization of net actuarial gain | (6) | (6)
Net periodic benefit cost | (15) | (12)
Regulatory account transfer | 0 | 0
Net periodic benefit cost | $ (15) | $ (12)

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