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Parent Company Financial Statements - Schedule of Condensed Statements of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 11,466 | $ 1,098 | $ 547
Adjustments to reconcile net income to cash provided by operating activities: |  |  |
Deferred tax (benefit) expense | (165) | 206 | (8)
Fair value adjustment on marketable equity securities, net | 11 | 3 | (34)
Stock based compensation expense | 5 | 19 | 0
Net change in other assets | 206 | 484 | (733)
Net change in other liabilities | (379) | 260 | 5
Net cash provided by (used in) operating activities | 2,660 | 2,791 | (284)
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net decrease (increase) in interest-earning deposits at banks | 5,416 | 6,965 | (4,767)
Purchase of marketable equity securities | 0 | 0 | (2)
Proceeds from sales of investments in marketable equity securities | 0 | 0 | 30
Net cash provided by (used in) investing activities | 2,429 | 75 | (7,568)
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Repurchase of Class A common stock | 0 | (1,240) | 0
Cash dividends paid | (117) | (83) | (42)
Other financing activities | (7) | (24) | 0
Net cash (used in) provided by financing activities | (4,699) | (2,686) | 7,828
Change in cash and due from banks | 390 | 180 | (24)
Cash and due from banks at beginning of period | 518 | 338 | 362
Cash and due from banks at end of period | 908 | 518 | 338
CASH PAYMENTS (REFUNDS) FOR: |  |  |
Income taxes | 514 | (551) | 870
Parent |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | 11,466 | 1,098 | 547
Adjustments to reconcile net income to cash provided by operating activities: |  |  |
(Undistributed) distributed net income of subsidiaries | (11,155) | 221 | (368)
Deferred tax (benefit) expense | (5) | 48 | 0
Net amortization of premiums and discounts | 0 | 1 | 1
Fair value adjustment on marketable equity securities, net | 11 | 6 | (34)
Stock based compensation expense | 5 | 19 | 0
Net change in due to or from subsidiaries | 0 | 0 | 4
Net change in other assets | (17) | (3) | 7
Net change in other liabilities | 3 | (2) | 3
Net cash provided by (used in) operating activities | 308 | 1,388 | 160
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net decrease (increase) in interest-earning deposits at banks | (2) | 3 | (4)
Purchase of marketable equity securities | 0 | 0 | (2)
Proceeds from sales of investments in marketable equity securities | 0 | 0 | 30
Proceeds from sales, calls, and maturities of investment securities | 0 | 0 | 2
Net cash paid in acquisition | 0 | (51) | 0
Net cash provided by (used in) investing activities | (2) | (48) | 26
CASH FLOWS FROM FINANCING ACTIVITIES |  |  |
Repayment of other borrowings | 0 | (68) | (20)
Repayment of subordinated debt | (87) | 0 | 0
(Repayment) proceeds for borrowings due to banking subsidiary | (15) | 20 | 0
Repurchase of Class A common stock | 0 | (1,240) | 0
Cash dividends paid | (117) | (83) | (42)
Other financing activities | (6) | (24) | 0
Net cash (used in) provided by financing activities | (225) | (1,395) | (62)
Change in cash and due from banks | 81 | (55) | 124
Cash and due from banks at beginning of period | 119 | 174 | 50
Cash and due from banks at end of period | 200 | 119 | 174
CASH PAYMENTS (REFUNDS) FOR: |  |  |
Interest | 23 | 18 | 17
Income taxes | $ 470 | $ (536) | $ 810

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