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DERIVATIVE FINANCIAL INSTRUMENTS - INTEREST RATE AND FOREIGN CURRENCY DERIVATIVES (Details) $ in Millions, $ in Billions | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2026 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 MXN ($) | Mar. 31, 2026 MXN ($) | Dec. 31, 2025 USD ($)
Derivative [Line Items] |  |  |  |  |  |
Termination of interest rate swaps, net of transaction costs | $ 96 | $ 96 | $ 0 |  |  |
Interest rate swaps de-designated |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative, terminated amount |  | 1,200 |  |  |  |
Interest rate swaps | Derivatives not designated as hedging instruments: | Disposal Group Held-for-sale | SI Partners |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Disposal group, derivative liability |  | 1,952 |  |  |  | $ 3,189
Foreign exchange instruments | Derivatives not designated as hedging instruments: |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of derivative |  | 783 |  | $ 13.8 |  |
Foreign exchange instruments | Derivatives not designated as hedging instruments: | Disposal Group Held-for-sale | SI Partners |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of derivative |  |  |  |  | $ 7.5 |
Foreign exchange instruments | Derivatives not designated as hedging instruments: | Disposal Group Held-for-sale | SI Partners | Minimum |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of derivative | 411 |  |  |  |  |
Foreign exchange instruments | Derivatives not designated as hedging instruments: | Disposal Group Held-for-sale | SI Partners | Maximum |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amount of derivative | $ 422 |  |  |  |  |
Cash Flow Hedging | Interest rate instruments | Disposal Group Held-for-sale | SI Partners |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Disposal group, derivative liability |  | 230 |  |  |  | 244
Cash Flow Hedging | Interest rate swaps |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional amounts |  | 1,826 |  |  |  | 2,286
Cash Flow Hedging | Foreign exchange instruments | Disposal Group Held-for-sale | SI Partners |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Disposal group, derivative liability |  | $ 80 |  |  |  | $ 172

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