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FAIR VALUE MEASUREMENTS - Summary of Total Estimated Fair Value and Carrying Value of Senior Unsecured Notes (Details) - Level 2 - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Fair value    
Fair Value, Assets and Liabilities    
Fair value $ 22,398 $ 23,335
Carrying value    
Fair Value, Assets and Liabilities    
Carrying value $ 23,823 $ 25,562