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ACCUMULATED OTHER COMPREHENSIVE LOSS AND STOCKHOLDERS’ DEFICIT - Schedule of Accumulated Other Comprehensive Loss Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Mar. 31, 2026 | Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at beginning of period | $ (4,092) | $ (3,771) | $ (3,168) | $ (2,992) | $ (3,771) | $ (2,992)
Other comprehensive income (loss) | 30 | (73) | 288 | 101 | (43) | 389
Balance at end of period | (4,525) | (4,092) | (2,964) | (3,168) | (4,525) | (2,964)
Intra-entity foreign currency long-term-investment (losses) gains |  |  |  |  | 20 | (68)
Accumulated Other Comprehensive Loss |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at beginning of period | (715) | (642) | (962) | (1,063) | (642) | (1,063)
Other comprehensive income (loss) | 30 | (73) | 288 | 101 |  |
Balance at end of period | (685) | (715) | (674) | (962) | (685) | (674)
Foreign Currency Translation Adjustments |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | (649) |  | (1,091) | (649) | (1,091)
Other comprehensive income (loss) |  |  |  |  | (54) | 420
Balance at end of period | (703) |  | (671) |  | (703) | (671)
Other Adjustments |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at beginning of period |  | $ 7 |  | $ 28 | 7 | 28
Other comprehensive income (loss) |  |  |  |  | 11 | (31)
Balance at end of period | $ 18 |  | $ (3) |  | $ 18 | $ (3)

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