BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details) - USD ($) $ in Millions |
Sep. 30, 2023 |
Dec. 31, 2022 |
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| Debt Instrument [Line Items] | ||
| Long-term debt | $ 12,822 | $ 9,686 |
| Federal Home Loan Bank advances | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 2,707 | 211 |
| Weighted average rate | 4.21% | |
| Other borrowings | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 504 | 572 |
| Parent | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 4,846 | 3,980 |
| Parent | Senior Notes | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 4,116 | 3,005 |
| Parent | Subordinated Notes | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 730 | 975 |
| Bank | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 4,765 | 4,923 |
| Bank | Senior Notes | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | 4,114 | 4,272 |
| Bank | Subordinated Notes | ||
| Debt Instrument [Line Items] | ||
| Long-term debt | $ 651 | $ 651 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average interest rate of debt outstanding. No definition available.
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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