FAIR VALUE MEASUREMENT OF ASSETS AND LIABILITIES - Schedule of Significant Unobservable Inputs of Loans and Interest Receivable Held for Sale (Details) $ / shares in Units, $ in Millions	Jun. 30, 2026 USD ($) $ / shares	Dec. 31, 2025 USD ($) $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Common stock, par value (in dollars per share) \| $ / shares	$ 0.0001	$ 0.0001
Fair Value, Nonrecurring Measurements
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and interest receivable, held for sale	$ 1,395	$ 1,223
Significant Other Unobservable Inputs (Level 3) \| Fair Value, Nonrecurring Measurements
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and interest receivable, held for sale	253	$ 41
Significant Other Unobservable Inputs (Level 3) \| Fair Value, Nonrecurring Measurements \| Valuation Technique, Consensus Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and interest receivable, held for sale	$ 253
Common stock, par value (in dollars per share) \| $ / shares	$ 1.00
Significant Other Unobservable Inputs (Level 3) \| Fair Value, Nonrecurring Measurements \| Valuation Technique, Consensus Pricing Model \| Low \| Measurement Input, Quoted Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, held for sale, measurement input	0.01
Significant Other Unobservable Inputs (Level 3) \| Fair Value, Nonrecurring Measurements \| Valuation Technique, Consensus Pricing Model \| High \| Measurement Input, Quoted Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, held for sale, measurement input	1.00
Significant Other Unobservable Inputs (Level 3) \| Fair Value, Nonrecurring Measurements \| Valuation Technique, Consensus Pricing Model \| Weighted Average \| Measurement Input, Quoted Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable, held for sale, measurement input	0.89