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DEBT AND EQUITY SECURITIES - Schedule of Net Gains (Losses) and Interest Income from Marketable Securities Held to Fund Operating Programs (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Unrealized gains (losses), net |  |  |  |
Net gains (losses) and interest income from marketable securities held to fund rabbi trusts | $ 30 | $ 2 | $ 16 | $ 24
Revenues for reimbursed costs | 14 | 0 | 7 | 11
Other income (loss), net (Note 19) | 3 | 1 | 5 | 1
Other comprehensive income (loss) (Note 14) | 4 | (2) | 11 | (6)
Realized gains, net |  |  |  |
Net gains (losses) and interest income from marketable securities held to fund rabbi trusts | 1 | 2 | 3 | 4
Revenues for reimbursed costs | $ 1 | $ 1 | $ 2 | $ 2

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- Definition Amount, before tax and adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A + Details
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