FINANCING ACTIVITIES - Schedule of Customer Accounts Receivable Managed Portfolio (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Debt Disclosure [Abstract] | ||
| Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts | $ 1,559 | $ 1,230 |
| Short-term – Securitized Debt of Receivables | 900 | 900 |
| Delinquent Securitized Accounts Receivable | 41 | 66 |
| Bad Debt Reserves Related to Securitization | 41 | 42 |
| Unbilled Receivables Related to Securitization | $ 338 | $ 368 |