REVENUE AND RECEIVABLES - Narrative (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Capitalized Contract Cost [Line Items] | |||
| Customer contract liabilities, increase (decrease) | $ (19) | $ 29 | |
| Amortization of deferred subscriber acquisition costs | 378 | 366 | |
| Additional liabilities recognized | 341 | $ 374 | |
| Variable Interest Entity, Primary Beneficiary | |||
| Capitalized Contract Cost [Line Items] | |||
| Transfers accounted for as secured borrowings, assets, carrying amount | $ 561 | $ 593 | |