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FINANCING ARRANGEMENTS - 2022 Exchange (Details) - USD ($) |  | 3 Months Ended | 5 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 08, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | May 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2022
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Gain on extinguishment of debt |  | $ 3,000,000 | $ 0 |  | $ 181,000,000 | $ 23,000,000 |
Unsecured Notes |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Repurchased debt, aggregate principal amount |  |  |  | $ 555,000,000 |  |  |
Gain on extinguishment of debt |  |  |  | $ 23,000,000 |  |  |
Unsecured Notes | Exchange Offer |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Repurchased debt, aggregate principal amount |  |  |  |  |  |  | $ 5,594,000,000
Secured Notes | 9.00% Intermediate Holdco Senior Notes, Due January 2028 |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Stated interest rate on debt (as a percent) | 9.00% |  |  |  |  |  |
Gain on extinguishment of debt | $ 226,000,000 |  |  |  |  |  |
Secured Notes | Exchange Offer |  |  |  |  |  |  |
Extinguishment of Debt [Line Items] |  |  |  |  |  |  |
Aggregate principal amount issued |  |  |  |  |  |  | 3,125,000,000
Reduction of outstanding principal |  |  |  |  |  |  | $ 2,469,000,000
Debt instrument, premium |  | $ 780,000,000 |  |  | 780,000,000 |  |
Contractual interest paid |  |  |  |  | 282,000,000 | 310,000,000 |
Amortization of debt premium |  |  |  |  | $ 251,000,000 | $ 273,000,000 |

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