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FAIR VALUE MEASUREMENTS - Reconciliation of Fair Value Measurements that Use Significant Unobservable Inputs (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Available-For-Sale, Debt Securities |  |
Available-for-sale debt securities |  |
Fair value at beginning of period | $ 47 | $ 30
Additions | 2 | 23
Change in fair value recognized in earnings | (22) | 0
Change in fair value recognized in AOCI | 0 | 4
Payments | 0 | 0
Transfers out of Level 3 | (5) | (10)
Fair value at end of period | 22 | 47
Acquisition-related Costs |  |
Contingent payments related to acquisitions |  |
Fair value at beginning of period | 84 | 143
Additions | 0 | 0
Change in fair value recognized in earnings | (19) | (39)
Change in fair value recognized in AOCI | 0 | 0
Payments | (51) | (20)
Transfers out of Level 3 | 0 | 0
Fair value at end of period | $ 14 | $ 84

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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