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FAIR VALUE MEASUREMENTS - Reconciliation of Fair Value Measurements that Use Significant Unobservable Inputs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Contingent payments related to acquisitions |  |  |  |  |  |  |  |
Contingent payments related to acquisitions |  |  |  |  |  |  |  |
Fair value at beginning of period | $ 19 | $ 90 | $ 19 | $ 90 | $ 21 | $ 84 | $ 113 | $ 143
Additions | 0 | 0 | 0 | 0 |  |  |  |
Change in fair value recognized in earnings | 0 | (6) | (14) | (34) |  |  |  |
Payments | (2) | (17) | (51) | (19) |  |  |  |
Change in fair value recognized in AOCI |  |  | 0 | 0 |  |  |  |
Transfers out of Level 3 |  |  | 0 | 0 |  |  |  |
Fair value at end of period | 19 | 90 | 19 | 90 |  |  |  |
Available-for-sale debt securities |  |  |  |  |  |  |  |
Available-for-sale debt securities |  |  |  |  |  |  |  |
Fair value at beginning of period | 37 | 44 | 47 | 30 |  |  |  |
Additions | 2 | 0 | 2 | 21 |  |  |  |
Change in fair value recognized in earnings | 0 | 0 | (5) | 0 |  |  |  |
Payments | 0 | 0 | 0 | 0 |  |  |  |
Change in fair value recognized in AOCI |  |  | 0 | 3 |  |  |  |
Transfers out of Level 3 |  |  | (5) | (10) |  |  |  |
Fair value at end of period | $ 39 | $ 44 | $ 39 | $ 44 |  |  |  |

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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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