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Shareholders' Equity and Other Comprehensive Income - Changes in Shares by Class (Details) - shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance, common stock, shares outstanding (in shares) | 148,039,495 |  |
Stock options exercised (in shares) | 923,000 | 572,000 | 820,000
Balance, common stock, shares outstanding (in shares) | 145,010,086 | 148,039,495 |
Preferred Shares Issued |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance (in shares) | 22,000,000 | 22,000,000 | 8,000,000
Issuance of preferred stock (in shares) |  |  | 14,000,000
Balance (in shares) | 22,000,000 | 22,000,000 | 22,000,000
Preferred Shares Issued | Series D Preferred Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance (in shares) | 8,000,000 | 8,000,000 | 8,000,000
Issuance of preferred stock (in shares) |  |  | 0
Balance (in shares) | 8,000,000 | 8,000,000 | 8,000,000
Preferred Shares Issued | Series E Preferred Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance (in shares) | 14,000,000 | 14,000,000 | 0
Issuance of preferred stock (in shares) |  |  | 14,000,000
Balance (in shares) | 14,000,000 | 14,000,000 | 14,000,000
Common Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance (in shares) | 168,133,000 | 166,801,000 | 143,300,000
Balance, common stock, shares outstanding (in shares) | 148,040,000 | 147,158,000 | 115,866,000
Issuance of common stock (in shares) | 125,000 | 379,000 | 344,000
Warrants exercised and common stock reissued (in shares) | 3,000 |  | 260,000
Restricted share unit activity (in shares) | 355,000 | 389,000 | 302,000
Stock options exercised (in shares) | 896,000 | 564,000 | 812,000
Repurchase of common stock (in shares) | 4,400,000 | 450,000 | 19,900,000
Repurchase of stock (in shares) | (4,409,000) | (450,000) | (19,903,000)
Balance (in shares) | 169,384,000 | 168,133,000 | 166,801,000
Balance, common stock, shares outstanding (in shares) | 145,010,000 | 148,040,000 | 147,158,000
Common Stock | FCB Financial Holdings, Inc. |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Issuance of common stock (in shares) |  |  | 22,043,000
Common stock reissued (in shares) |  |  | (27,434,000)
Treasury Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Balance (in shares) | 20,093,000 | 19,643,000 | 27,434,000
Issuance of common stock (in shares) | (125,000) |  |
Warrants exercised and common stock reissued (in shares) | (3,000) |  | (260,000)
Repurchase of common stock (in shares) | 4,409,000 | 450,000 | 19,903,000
Balance (in shares) | 24,374,000 | 20,093,000 | 19,643,000
Treasury Stock | FCB Financial Holdings, Inc. |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Common stock reissued (in shares) |  |  | (27,434,000)

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