v3.25.2
BORROWINGS - Schedule of Subordinated Debt (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
Debt Instrument [Line Items]  
Aggregate Principal Amount Issued $ 1,095
Net Proceeds 1,086
Carrying Value 1,090
Senior Notes  
Debt Instrument [Line Items]  
Aggregate Principal Amount Issued 850
Net Proceeds 844
Carrying Value 847
Other Subordinated Debt  
Debt Instrument [Line Items]  
Aggregate Principal Amount Issued 245
Net Proceeds 242
Carrying Value $ 243
5.150% Senior Notes due August 25, 2025 | Senior Notes  
Debt Instrument [Line Items]  
Interest Rate 5.15%
Aggregate Principal Amount Issued $ 350
Net Proceeds 347
Carrying Value $ 350
Subordinated Notes Due 2030 | Senior Notes  
Debt Instrument [Line Items]  
Interest Rate 5.722%
Aggregate Principal Amount Issued $ 500
Net Proceeds 497
Carrying Value $ 497
Subordinated Notes Due 2030 | Other Subordinated Debt  
Debt Instrument [Line Items]  
Basis points, interest rate, type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]
Basis points, spread 1.93%
7.984% Fixed-To-Floating Rate Subordinated Notes due 2029 | Other Subordinated Debt  
Debt Instrument [Line Items]  
Interest Rate 6.969%
Aggregate Principal Amount Issued $ 120
Net Proceeds 118
Carrying Value $ 119
Basis points, interest rate, type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]
Basis points, spread 2.40%
Basis points, tenor spread adjustment 0.0026
4.875% Subordinated Notes due 2025 | Other Subordinated Debt  
Debt Instrument [Line Items]  
Interest Rate 4.875%
Aggregate Principal Amount Issued $ 100
Net Proceeds 98
Carrying Value $ 100
8.620% Fixed-To-Floating Rate Subordinated Notes due December 6, 2028 | Other Subordinated Debt  
Debt Instrument [Line Items]  
Interest Rate 7.597%
Aggregate Principal Amount Issued $ 25
Net Proceeds 26
Carrying Value $ 24
Basis points, interest rate, type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]
Basis points, spread 3.02%
Basis points, tenor spread adjustment 0.0026