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EMPLOYEE BENEFIT PLANS (Components of Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost for benefits earned | $ 575 | $ 587 | $ 530
Interest cost | 692 | 645 | 713
Expected return on plan assets | (1,189) | (1,046) | (1,044)
Amortization of prior service cost | (4) | (6) | (6)
Amortization of net actuarial loss | 2 | 6 | 3
Net periodic benefit cost | 76 | 186 | 196
Less: transfer to regulatory account | 254 | 147 | 136
Total expense recognized | 330 | 333 | 332
PBOP Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Service cost for benefits earned | 62 | 63 | 61
Interest cost | 53 | 51 | 63
Expected return on plan assets | (130) | (137) | (138)
Amortization of prior service cost | 7 | 14 | 14
Amortization of net actuarial loss | (40) | (33) | (21)
Special termination benefits | 22 | 0 | 0
Net periodic benefit cost | $ (26) | $ (42) | $ (21)

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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