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FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Schedule of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Measurement Alternative $ 1,424 $ 1,485 $ 1,509 $ 1,359 $ 1,413 $ 1,336
Fair Value, measurements, not on a recurring basis            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans and interest receivable, held for sale 1,395   1,223      
Non-marketable equity securities measured using the Measurement Alternative 271   690      
Total financial assets 1,666   1,913      
Measurement Alternative 1,200   819      
Fair Value, measurements, not on a recurring basis | Significant Other Observable Inputs (Level 2)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans and interest receivable, held for sale 1,142   1,182      
Non-marketable equity securities measured using the Measurement Alternative 117   679      
Total financial assets 1,259   1,861      
Fair Value, measurements, not on a recurring basis | Significant Other Unobservable Inputs (Level 3)            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans and interest receivable, held for sale 253   41      
Non-marketable equity securities measured using the Measurement Alternative 154   11      
Total financial assets $ 407   $ 52