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PARENT COMPANY FINANCIAL STATEMENTS - Schedule of Statements of Income of Parent Company Only (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Condensed Income Statements, Captions [Line Items] |  |  |
Interest income | $ 2,326 | $ 2,252 | $ 1,973
Other income | 24 | 15 | 12
Interest expense | 930 | 972 | 656
Income tax benefit | (104) | (90) | (99)
Net income | 565 | 465 | 485
Parent Company |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Dividend income from subsidiaries: | 228 | 309 | 385
Interest income | 22 | 23 | 16
Other income | 1 | 1 | 1
Total Income | 251 | 333 | 402
Interest expense | 70 | 53 | 47
Other expenses | 57 | 29 | 21
Total Expenses | 127 | 82 | 68
Income Before Taxes and Equity in Undistributed Income of Subsidiaries | 124 | 251 | 334
Income tax benefit | 23 | 14 | 15
Income after income taxes | 147 | 265 | 349
Equity in undistributed income of subsidiaries: | 418 | 200 | 136
Net income | 565 | 465 | 485
Parent Company | Bank |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Dividend income from subsidiaries: | 227 | 307 | 382
Equity in undistributed income of subsidiaries: | 414 | 194 | 130
Parent Company | Non-bank |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Dividend income from subsidiaries: | 1 | 2 | 3
Equity in undistributed income of subsidiaries: | $ 4 | $ 6 | $ 6

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