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INCOME TAXES - Narrative (Details) € in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2022 EUR (€) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Income Tax Examination [Line Items] |  |  |  |  |  |
Provision (benefit) for income taxes |  | $ 12 | $ 49 | $ 51 | $ 57 |
Income tax expense (benefit) on ordinary income (loss) |  |  |  | 102 | 68 |
Income tax expense (benefit) for discrete items |  |  |  | 51 |  |
Current federal tax expense (benefit) |  |  |  | (36) |  |
Unrecognized tax benefits |  | 19 |  | 19 |  |
Restructuring costs |  |  |  | 8 |  |
Income tax expense (benefit) related to changes in uncertain tax positions |  |  |  | 10 | 12 |
Net income tax benefit for discrete items |  |  |  |  | $ 11 |
Valuation allowance against deferred tax assets |  | 2,368 |  | 2,368 |  | $ 2,284
Unrecognized tax benefits including interest and penalties |  | 951 |  | 951 |  | 924
Unrecognized tax benefits related to interest and penalties |  | 82 |  | 82 |  | $ 68
Portion of unrecognized tax benefits, if recognized, would reduce the company's effective tax rate |  | $ 401 |  | 401 |  |
Estimate of possible loss, income tax examination |  |  |  | $ 64 |  |
Luxembourg Inland Revenue | Tax Year 2018 and 2019 |  |  |  |  |  |
Income Tax Examination [Line Items] |  |  |  |  |  |
Estimate of possible loss, income tax examination | € | € 271.7 |  |  |  |  |

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