Western Alliance Bancorporation (WAL) 10-Q2 May 242024 Q1 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2024	Apr. 26, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-32550
Entity Registrant Name	WESTERN ALLIANCE BANCORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0365922
Entity Address, Address Line One	One E. Washington Street, Suite 1400
Entity Address, City or Town	Phoenix
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85004
City Area Code	602
Local Phone Number	389-3500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		110,110,512
Entity Central Index Key	0001212545
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.0001 Par Value
Trading Symbol	WAL
Security Exchange Name	NYSE
Noncumulative Preferred Stock
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shares, Each Representing a 1/400th Interest in a Share of 4.250% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series A
Trading Symbol	WAL PrA
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets:
Cash and due from banks	$ 264	$ 276
Interest-bearing deposits in other financial institutions	3,286	1,300
Cash and cash equivalents	3,550	1,576
Fair value	14,509	11,165
Amortized cost	1,453	1,421
Investment securities - equity	130	126
Investments in restricted stock, at cost	248	281
Loans HFS	1,841	1,402
Loans:
Loans HFI, net of deferred fees and costs	50,700	50,297
Less: allowance for credit losses	(340.3)	(336.7)
Net loans HFI	50,360	49,960
Mortgage servicing rights	1,178	1,124
Premises and equipment, net	344	339
Operating lease right of use asset	139	145
Bank owned life insurance	187	186
Goodwill and intangible assets, net	666	669
Deferred tax assets, net	300	287
Investments in LIHTC and renewable energy	553	573
Other assets	1,531	1,608
Total assets	76,989	70,862
Deposits:
Non-interest-bearing demand	18,399	14,520
Interest-bearing	43,829	40,813
Total deposits	62,228	55,333
Other borrowings	6,221	7,230
Qualifying debt	896	895
Operating lease liability	172	179
Other liabilities	1,300	1,147
Total liabilities	70,817	64,784
Commitments and contingencies (Note 14)
Stockholders’ equity:
Preferred stock (par value $0.0001 and liquidation value per share of $25; 20,000,000 authorized; 12,000,000 depositary shares issued and outstanding at March 31, 2024 and December 31, 2023)	295	295
Common stock (par value $0.0001; 200,000,000 authorized; 113,005,772 shares issued at March 31, 2024 and 112,169,523 at December 31, 2023) and additional paid in capital	2,211	2,197
Treasury stock, at cost (2,825,815 shares at March 31, 2024 and 2,703,218 shares at December 31, 2023)	(124)	(116)
Accumulated other comprehensive loss	(558)	(513)
Retained earnings	4,348	4,215
Total stockholders’ equity	6,172.5	6,078.4
Total liabilities and stockholders’ equity	$ 76,989	$ 70,862

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Amortized cost	$ 15,251	$ 11,849
Investment securities - AFS, ACL	1.3	1.4
Investment securities - HTM, allowance for credit losses	8	8
Investment securities - HTM, fair value	$ 1,253	$ 1,251
Preferred stock, par value (dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, liquidation value (dollars per share)	$ 25	$ 25
Preferred stock, shares authorized (shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (shares)	12,000,000	12,000,000
Preferred stock, shares issued (shares)	12,000,000	12,000,000
Common stock, par value (dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	113,005,772	112,169,523
Treasury stock (shares)	2,825,815	2,703,218

CONSOLIDATED INCOME STATEMENTS

CONSOLIDATED INCOME STATEMENTS - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income:
Loans, including fees	$ 871.9	$ 832.7
Investment securities	142.4	94.3
Dividends and other	40.7	41.9
Total interest income	1,055	968.9
Interest expense:
Deposits	380.6	231.6
Qualifying debt	9.5	9.3
Other borrowings	66	118.1
Total interest expense	456.1	359
Net interest income	598.9	609.9
Provision for credit losses	15.2	19.4
Net interest income after provision for credit losses	583.7	590.5
Non-interest income:
Net loan servicing revenue	46.4	41.9
Net gain on loan origination and sale activities	45.3	31.4
Income from equity investments	17.1	1.4
Service charges and fees	9.9	9.5
Commercial banking related income	6.5	6.2
Fair value gain (loss) adjustments, net	0.3	(147.8)
(Loss) gain on recovery from credit guarantees	(0.5)	3.3
Loss on sales of investment securities	(0.9)	(12.5)
Other income	5.8	8.6
Total non-interest income	129.9	(58)
Non-interest expense:
Salaries and employee benefits	154.9	148.9
Deposit costs	137	86.9
Insurance	58.9	15.7
Data processing	36	26.4
Legal, professional, and directors' fees	30.1	23.1
Occupancy	17.5	16.5
Loan servicing expenses	15	13.8
Business development and marketing	5.5	5.2
Loan acquisition and origination expenses	4.8	4.4
Gain on extinguishment of debt	0	(12.7)
Other expense	22.1	19.7
Total non-interest expense	481.8	347.9
Income before provision for income taxes	231.8	184.6
Income tax expense	54.4	42.4
Net income	177.4	142.2
Dividends on preferred stock	3.2	3.2
Net income available to common stockholders	$ 174.2	$ 139
Earnings per share:
Basic (dollars per share)	$ 1.61	$ 1.29
Diluted (dollars per share)	$ 1.60	$ 1.28
Weighted average number of common shares outstanding:
Basic (shares)	108.5	108.1
Diluted (shares)	109	108.3
Dividends declared per common share (dollars per share)	$ 0.37	$ 0.36

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 177.4	$ 142.2
Other comprehensive (loss) income, net:
Unrealized (loss) gain on AFS securities, net of tax effect of $14.8 and $(20.7) respectively	(44.9)	60.1
Unrealized loss on junior subordinated debt, net of tax effect of $0.2 and $0.4 respectively	(0.5)	(1.1)
Realized loss on sale of AFS securities included in income, net of tax effect of $(0.2) and $(3.2) respectively	0.7	9.3
Realized loss on impairment of AFS securities included in income, net of tax effect of $— and $(0.4) respectively	0	1.2
Net other comprehensive (loss) income	(44.7)	69.5
Comprehensive income	$ 132.7	$ 211.7

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Unrealized (loss) gain on AFS securities, tax effect	$ 14.8	$ (20.7)
Unrealized gain (loss) on junior subordinated debt, tax effect	0.2	0.4
Realized loss (gain) on sale of AFS securities included in income, tax effect	(0.2)	(3.2)
Realized loss on impairment of AFS securities included in income, tax effect	$ 0	$ (0.4)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions		Total	Preferred Stock	Common Stock	Additional Paid in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (shares) at Dec. 31, 2022			12	108.9
Beginning balance at Dec. 31, 2022		$ 5,356	$ 294.5	$ 0	$ 2,163.7	$ (105.3)	$ (661)	$ 3,664.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		142.2						142.2
Restricted stock, performance stock units, and other grants, net (shares)				0.7
Restricted stock, performance stock units, and other grants, net		6.1			6.1
Restricted stock surrendered (shares)	[1]			(0.1)
Restricted stock surrendered	[1]	(10.7)				(10.7)
Dividends paid to preferred stockholders		(3.2)						(3.2)
Dividends paid to common stockholders		(39.4)						(39.4)
Other comprehensive income, net		69.5					69.5
Ending balance (shares) at Mar. 31, 2023			12	109.5
Ending balance at Mar. 31, 2023		5,520.5	$ 294.5	$ 0	2,169.8	(116)	(591.5)	3,763.7
Beginning balance (shares) at Dec. 31, 2023			12	109.4
Beginning balance at Dec. 31, 2023		6,078.4	$ 294.5	$ 0	2,198.1	(116.3)	(512.9)	4,215
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		177.4						177.4
Restricted stock, performance stock units, and other grants, net (shares)				0.9
Restricted stock, performance stock units, and other grants, net		13.1			13.1
Restricted stock surrendered (shares)	[1]			(0.1)
Restricted stock surrendered	[1]	(7.8)			(0.2)	(7.6)
Dividends paid to preferred stockholders		(3.2)						(3.2)
Dividends paid to common stockholders		(40.7)						(40.7)
Other comprehensive income, net		(44.7)					(44.7)
Ending balance (shares) at Mar. 31, 2024			12	110.2
Ending balance at Mar. 31, 2024		$ 6,172.5	$ 294.5	$ 0	$ 2,211	$ (123.9)	$ (557.6)	$ 4,348.5

[1]Share amounts represent Treasury Shares.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income		$ 177.4	$ 142.2
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses		15.2	19.4
Depreciation and amortization		20.8	16.5
Stock-based compensation		13.1	6.1
Deferred income taxes		2.7	(5.5)
Amortization of net (discounts) premiums for investment securities		(56.5)	2
Amortization of tax credit investments		18.6	11.3
Amortization of operating lease right of use asset		6	6
Amortization of net deferred loan fees and net purchase premiums		(20.9)	(22.6)
Purchases and originations of loans HFS		(9,984.5)	(8,067.2)
Proceeds from sales and payments on loans HFS		9,432.8	8,265.4
Mortgage servicing rights capitalized upon sale of mortgage loans		(188.7)	(142.4)
Net (gains) losses on:
Change in fair value of loans HFS, mortgage servicing rights, and related derivatives		(28.5)	43.5
Fair value adjustments		0.7	149.8
Sale of investment securities		0.9	12.5
Extinguishment of debt		0	(12.7)
Other		(3)	(3.6)
Other assets and liabilities, net		287.4	(63.4)
Net cash (used in) provided by operating activities		(306.5)	357.3
Investment securities - AFS
Purchases		(5,938)	(931.3)
Principal pay downs and maturities		1,285.6	61.1
Proceeds from sales		1,403.2	429.3
Investment securities - HTM
Purchases		(36.9)	(44)
Principal pay downs and maturities		4.2	7.7
Equity securities carried at fair value
Purchases		(0.2)	(0.5)
Proceeds from sale of mortgage servicing rights and related holdbacks, net		162.3	335.2
Sale (purchase) of other investments		16.6	(172.6)
Net increase in loans HFI		(525.7)	(1,003.5)
Purchase of premises, equipment, and other assets, net		(18.8)	(28.5)
Net cash used in investing activities		(3,647.7)	(1,347.1)
Cash flows from financing activities:
Net increase (decrease) in deposits		6,895.7	(6,056.6)
Payments on long-term debt		(5.4)	(257.3)
Net (decrease) increase in short-term borrowings		(910.6)	9,952.9
Cash paid for tax withholding on vested restricted stock and other		(7.8)	(10.7)
Cash dividends paid on common stock and preferred stock		(43.9)	(42.6)
Net cash provided by financing activities		5,928	3,585.7
Net increase in cash and cash equivalents		1,973.8	2,595.9
Cash, cash equivalents, and restricted cash at beginning of period		1,576.1	1,043.4
Cash, cash equivalents, and restricted cash at end of period		3,549.9	3,639.3
Cash paid during the period for:
Interest		439	329.5
Income taxes, net		(145.2)	(7.5)
Non-cash activities:
Transfers of mortgage-backed securities in settlement of secured borrowings		95.4	125.2
Transfers of securitized loans HFS to AFS securities		60.6	43.9
Transfers of loans HFI to HFS, net of fair value loss adjustment (1)	[1]	$ 142.1	$ 5,910.4

[1] (1)

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Cash Flows [Abstract]
Loans transferred with original designation of HFS, operating cash flows	$ 89.1	$ 294.4

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of operations WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of customized loan, deposit, and treasury management capabilities, including 24/7 funds transfer and other digital payment offerings through its wholly-owned banking subsidiary, WAB. WAB operates the following full-service banking divisions: ABA, BON, FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services, including mortgage banking services through AmeriHome, and digital payment services for the class action legal industry. In addition, the Company has the following non-bank subsidiaries: CSI, a captive insurance company formed and licensed under the laws of the State of Arizona and established as part of the Company's overall enterprise risk management strategy, and WATC, which provides corporate trust services and levered loan administration solutions. Basis of presentation The accompanying Unaudited Consolidated Financial Statements as of March 31, 2024 and for the three months ended March 31, 2024 and 2023 have been prepared in accordance with GAAP for interim financial information and Article 10 of Regulation S-X and, therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. Accordingly, these statements should be read in conjunction with the Company's audited Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. The accounts of the Company and its consolidated subsidiaries are included in the Consolidated Financial Statements. The information furnished in these interim statements reflects all adjustments that are, in the opinion of management, necessary for a fair statement of the results for each respective period presented. Such adjustments are of a normal, recurring nature. The results of operations in the interim statements are not necessarily indicative of the results that may be expected for any other quarter or for the full year. Recent accounting pronouncements Improvements to Income Tax Disclosures In December 2023, the FASB issued guidance within ASU 2023-09, Income Taxes (Topic 740) . The amendments in this update are intended to increase visibility into various income tax components that affect the reconciliation of the effective tax rate to the statutory rate, as well as the qualitative and quantitative aspects of those components. Public business entities will be required to disclose on an annual basis, specific categories in the rate reconciliation and provide additional information for reconciling items that meet or exceed a five percent threshold (computed by multiplying pretax income by the applicable statutory income tax rate) and include disclosure of state and local jurisdictions that make up the majority of the state and local income tax category in the rate reconciliation. Additional disclosure items include disaggregation of income taxes paid to and income tax expense from federal, state, and foreign jurisdictions as well as disaggregation of income taxes paid to individual jurisdictions in which income taxes paid are equal to or greater than five percent of total income taxes paid. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and interim periods within fiscal years beginning after December 15, 2025 and may be applied on a prospective or retrospective basis. The Company is currently evaluating the impact these amendments will have on its Consolidated Financial Statements. Accounting for and Disclosure of Crypto Assets In December 2023, the FASB issued guidance within ASU 2023-08, Intangibles — Goodwill and Other — Crypto Assets (Topic 350) . The amendments in this update require entities that hold certain crypto assets to measure such assets at fair value and recognize any changes in fair value in net income in each reporting period. Entities will also be required to present crypto assets measured at fair value separately from other intangible assets on the balance sheet and changes from the remeasurement of crypto assets separately from changes in the carrying amounts of other intangible assets in the income statement. Other disclosure items include the name, cost basis, fair value, and number of units for each significant crypto asset holding and the aggregate fair values and cost bases of crypto asset holdings that are not individually significant along with a rollforward of activity in the reporting period and disclosure of the method for determining the cost basis of the crypto assets. The amendments in this update are effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years and are applied through a cumulative-effect adjustment to the opening balance of retained earnings (as of the beginning of the annual reporting period of adoption). As the Company does not currently hold any crypto assets meeting the criteria outlined in the update, the adoption of this guidance is not expected to have an impact on the Company's Consolidated Financial Statements. Improvements to Reportable Segment Disclosures In November 2023, the FASB issued guidance within ASU 2023-07, Segment Reporting (Topic 280). The amendments in this update are intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures related to significant segment expenses. The amendments do not change how an entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments and all existing segment disclosure requirements in ASC 280 and other Codification topics remain unchanged. The amendments in this update are incremental and require public entities that report segment information to disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss as well as other segment items. Annual disclosure of the title and position of the chief operating decision maker and how the reported measures of segment profit or loss are used to assess performance and allocation of resources is also required. The amendments in this update are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024 and are applied on a retrospective basis. The Company is currently evaluating the impact these amendments will have on its Consolidated Financial Statements. Recently adopted accounting guidance Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method In March 2023, the FASB issued guidance within ASU 2023-02, Investments — Equity Method and Joint Ventures (Topic 323). The amendments in this update permit entities to elect to account for tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. Previously this option was only permitted for LIHTC investments. Additionally, the amendments in this update require that all tax equity investments accounted for using the proportional amortization method apply the delayed equity contribution guidance in Subtopic 323-740 and disclosure of the nature of an entity's tax equity investments and their effect on an entity's financial position and results of operations. The Company adopted this accounting guidance prospectively on January 1, 2024. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements. Use of estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates and judgments are ongoing and are based on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities, as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Consolidated Financial Statements and related notes. Material estimates that are susceptible to significant changes in the near term relate to: 1) the determination of the ACL; 2) certain assets and liabilities carried at or evaluated using fair value measurements; 3) goodwill impairment; and 4) accounting for income taxes. Principles of consolidation As of March 31, 2024, WAL has the following significant wholly-owned subsidiaries: WAB and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities. WAB has the following significant wholly-owned subsidiaries: 1) WABT, which holds certain investment securities, municipal and nonprofit loans, and leases; 2) WA PWI, which holds interests in certain limited partnerships invested primarily in low income housing tax credits and small business investment corporations; 3) Helios Prime, which holds interests in certain limited partnerships invested in renewable energy projects; 4) BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities; and 5) Western Finance Company, which purchases and originates equipment finance leases and provides mortgage banking services through its wholly-owned subsidiary, AmeriHome. The Company does not have any other significant entities that should be consolidated. All significant intercompany balances and transactions have been eliminated in consolidation. Reclassifications

Investment Securities

Investment Securities	3 Months Ended
Investment Securities	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Investment Securities	2. INVESTMENT SECURITIES The carrying amounts and fair values of investment securities are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,278 $ — $ (169) $ 1,109 Private label residential MBS 183 — (39) 144 Total HTM securities $ 1,461 $ — $ (208) $ 1,253 Available-for-sale debt securities U.S. Treasury securities $ 7,019 $ — $ (8) $ 7,011 Residential MBS issued by GSEs 4,928 3 (395) 4,536 Private label residential MBS 1,301 1 (211) 1,091 Tax-exempt 927 — (78) 849 Commercial MBS issued by GSEs 591 5 (10) 586 Corporate debt securities 411 — (44) 367 Other 74 3 (8) 69 Total AFS debt securities $ 15,251 $ 12 $ (754) $ 14,509 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,243 $ 1 $ (140) $ 1,104 Private label residential MBS 186 — (39) 147 Total HTM securities $ 1,429 $ 1 $ (179) $ 1,251 Available-for-sale debt securities U.S. Treasury securities $ 4,853 $ 1 $ (1) $ 4,853 Residential MBS issued by GSEs 2,328 3 (359) 1,972 CLO 1,407 1 (9) 1,399 Private label residential MBS 1,320 1 (204) 1,117 Tax-exempt 925 — (67) 858 Commercial MBS issued by GSEs 531 8 (9) 530 Corporate debt securities 411 — (44) 367 Other 74 4 (9) 69 Total AFS debt securities $ 11,849 $ 18 $ (702) $ 11,165 In addition, the Company held equity securities, which primarily consisted of preferred stock and CRA investments, with a fair value of $130 million and $126 million at March 31, 2024 and December 31, 2023, respectively. Unrealized gains on equity securities of $3.9 million and losses of $8.5 million for the three months ended March 31, 2024 and 2023, respectively, were recognized in earnings as a component of Fair value gain (loss) adjustments, net. Securities with carrying amounts of approximately $8.0 billion and $7.7 billion at March 31, 2024 and December 31, 2023, respectively, were pledged for various purposes as required or permitted by law. The following tables summarize the Company's AFS debt securities in an unrealized loss position, aggregated by major security type and length of time in a continuous unrealized loss position: March 31, 2024 Less Than Twelve Months More Than Twelve Months Total Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (in millions) Available-for-sale debt securities U.S. Treasury securities $ 8 $ 6,338 $ — $ — $ 8 $ 6,338 Residential MBS issued by GSEs 5 1,125 390 1,570 395 2,695 Private label residential MBS — — 211 997 211 997 Tax-exempt 1 33 77 815 78 848 Commercial MBS issued by GSEs 1 137 9 52 10 189 Corporate debt securities (1) — — 44 360 44 360 Other — — 8 55 8 55 Total AFS securities $ 15 $ 7,633 $ 739 $ 3,849 $ 754 $ 11,482 (1) Includes securities with an ACL that have a fair value of $22 million and unrealized losses of $6 million. December 31, 2023 Less Than Twelve Months More Than Twelve Months Total Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (in millions) Available-for-sale debt securities U.S. Treasury securities $ 1 $ 2,208 $ — $ — $ 1 $ 2,208 Residential MBS issued by GSEs 3 174 356 1,551 359 1,725 Private label residential MBS — — 204 1,020 204 1,020 CLO — — 9 845 9 845 Tax-exempt 3 67 64 773 67 840 Corporate debt securities (1) — — 44 359 44 359 Commercial MBS issued by GSEs — — 9 53 9 53 Other — — 9 54 9 54 Total AFS securities $ 7 $ 2,449 $ 695 $ 4,655 $ 702 $ 7,104 (1) Includes securities with an ACL that have a fair value of $54 million and unrealized losses of $8 million. The total number of AFS debt securities in an unrealized loss position at March 31, 2024 was 770, compared to 708 at December 31, 2023. On a quarterly basis, the Company performs an impairment analysis on its AFS debt securities in an unrealized loss position at the end of the period to determine whether credit losses should be recognized on these securities. Qualitative considerations made by the Company in its impairment analysis are further discussed below. Government Issued Securities U.S. Treasury securities and commercial and residential MBS are issued by either government agencies or GSEs. These securities are either explicitly or implicitly guaranteed by the U.S. government and are highly rated by major rating agencies. Further, principal and interest payments on these securities continue to be made on a timely basis. Non-Government Issued Securities Qualitative factors used in the Company's credit loss assessment of its securities that are not issued and guaranteed by the U.S. government include consideration of any adverse conditions related to a specific security, industry, or geographic region of its securities, any credit ratings below investment grade, the payment structure of the security and the likelihood of the issuer to be able to make payments that increase in the future, and failure of the issuer to make any scheduled principal or interest payments. For the Company's corporate debt and tax-exempt securities, the Company also considers various metrics of the issuer including days of cash on hand, the ratio of long-term debt to total assets, the net change in cash between reporting periods, and consideration of any breach in covenant requirements. The Company's corporate debt securities are primarily investment grade, issuers continue to make timely principal and interest payments, and the unrealized losses on these security portfolios primarily relate to changes in interest rates and other market conditions not considered to be credit-related issues. The Company continues to receive timely principal and interest payments on its tax-exempt securities and the majority of these issuers have revenues pledged for payment of debt service prior to payment of other types of expenses. In consideration of the continued effects from the bank failures in 2023, the Company performed a targeted impairment analysis on its AFS debt securities issued by regional banks held in its corporate debt securities portfolio. The Company considered the issuers' credit ratings, probability of default, and other factors. As a result of the analysis, a $0.1 million recovery and $19.3 million provision for credit losses were recognized during the three months ended March 31, 2024 and 2023, respectively. The provision for credit losses for the three months ended March 31, 2023 included recognition of a $17.1 million charge-off for one debt security issued by a regional bank that was sold. The Company does not intend to sell and it is more likely than not the Company will not be required to sell the remainder of these regional bank debt securities prior to their anticipated recovery, therefore, no additional credit losses on the Company's remaining portfolio have been recognized during the three months ended March 31, 2024. For the Company's private label residential MBS, which consist of non-agency collateralized mortgage obligations secured by pools of residential mortgage loans, the Company also considers metrics such as securitization risk weight factor, current credit support, whether there were any mortgage principal losses resulting from defaults in payments on the underlying mortgage collateral, and the credit default rate over the last twelve months. These securities primarily carry investment grade credit ratings, principal and interest payments on these securities continue to be made on a timely basis, and credit support for these securities is considered adequate. The Company's CLO portfolio consisted of highly rated securitization tranches, containing pools of medium to large-sized corporate, high yield loans. These were variable rate securities that had an investment grade rating of Single-A or better. Unrealized losses on these securities were primarily a function of the differential from the offer price and the valuation mid-market price as well as changes in interest rates. Unrealized losses on the Company's other securities portfolio relate to taxable municipal and trust preferred securities. The Company is continuing to receive timely principal and interest payments on its taxable municipal securities, these securities continue to be highly rated and the number of days of cash on hand is strong. The Company's trust preferred securities are investment grade and the issuers continue to make timely principal and interest payments. The following table presents a rollforward by major security type of the ACL on the Company's AFS debt securities: Three Months Ended March 31, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 1.4 $ (0.1) $ — $ — $ 1.3 Three Months Ended March 31, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ — $ 19.3 $ (17.1) $ — $ 2.2 The credit loss model under ASC 326-20, applicable to HTM debt securities, requires recognition of lifetime expected credit losses through an allowance account at the time the security is purchased. The following table presents a rollforward by major security type of the ACL on the Company's HTM debt securities: Three Months Ended March 31, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 7.8 $ 0.4 $ — $ — $ 8.2 Three Months Ended March 31, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 1.3 $ — $ — $ 6.5 No allowance has been recognized on the Company's HTM private label residential MBS as losses are not expected due to the Company holding a senior position in these securities. Accrued interest receivable on HTM securities totaled $5 million at March 31, 2024 and December 31, 2023, and is excluded from the estimate of expected credit losses. The following tables summarize the carrying amount of the Company’s investment ratings position, which are updated quarterly and used to monitor the credit quality of the Company's securities: March 31, 2024 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Tax-exempt $ — $ — $ — $ — $ — $ — $ 1,278 $ 1,278 Private label residential MBS — — — — — — 183 183 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,461 $ 1,461 Available-for-sale debt securities U.S. Treasury securities $ — $ 7,011 $ — $ — $ — $ — $ — $ 7,011 Residential MBS issued by GSEs — 4,536 — — — — — 4,536 Private label residential MBS 1,064 — 26 — — 1 — 1,091 Tax-exempt 9 15 356 380 — — 89 849 Commercial MBS issued by GSEs — 586 — — — — — 586 Corporate debt securities — — — 76 242 49 — 367 Other — — 9 11 29 3 17 69 Total AFS securities (1) $ 1,073 $ 12,148 $ 391 $ 467 $ 271 $ 53 $ 106 $ 14,509 Equity securities Preferred stock $ — $ — $ — $ — $ 55 $ 38 $ 12 $ 105 CRA investments — 25 — — — — — 25 Total equity securities (1) $ — $ 25 $ — $ — $ 55 $ 38 $ 12 $ 130 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies. December 31, 2023 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Tax-exempt $ — $ — $ — $ — $ — $ — $ 1,243 $ 1,243 Private label residential MBS — — — — — — 186 186 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,429 $ 1,429 Available-for-sale debt securities U.S. Treasury securities $ — $ 4,853 $ — $ — $ — $ — $ — $ 4,853 Residential MBS issued by GSEs — 1,972 — — — — — 1,972 CLO 79 — 1,265 55 — — — 1,399 Private label residential MBS 1,090 — 26 — — 1 — 1,117 Tax-exempt 9 16 361 386 — — 86 858 Commercial MBS issued by GSEs — 530 — — — — — 530 Corporate debt securities — — — 76 211 80 — 367 Other — — 9 11 28 4 17 69 Total AFS securities (1) $ 1,178 $ 7,371 $ 1,661 $ 528 $ 239 $ 85 $ 103 $ 11,165 Equity securities Preferred stock $ — $ — $ — $ — $ 54 $ 35 $ 11 $ 100 CRA investments — 26 — — — — — 26 Total equity securities (1) $ — $ 26 $ — $ — $ 54 $ 35 $ 11 $ 126 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies. A security is considered to be past due once it is 30 days contractually past due under the terms of the agreement. As of March 31, 2024, the Company did not have a significant amount of investment securities that were past due or on nonaccrual status. The amortized cost and fair value of the Company's debt securities as of March 31, 2024, by contractual maturities are shown below. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. March 31, 2024 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 29 $ 29 After one year through five years 8 8 After five years through ten years 86 74 After ten years 1,155 998 Mortgage-backed securities 183 144 Total HTM securities $ 1,461 $ 1,253 Available-for-sale Due in one year or less $ 6,540 $ 6,535 After one year through five years 646 634 After five years through ten years 278 242 After ten years 967 885 Mortgage-backed securities 6,820 6,213 Total AFS securities $ 15,251 $ 14,509 The following table presents gross gains and losses on sales of investment securities: Three Months Ended March 31, 2024 2023 (in millions) Available-for-sale securities Gross gains $ 0.9 $ 3.4 Gross losses (1.8) (15.9) Net losses on AFS securities $ (0.9) $ (12.5)

Loans Held For Sale

Loans Held For Sale	3 Months Ended
Loans Held For Sale	Mar. 31, 2024
Receivables [Abstract]
Loans Held For Sale	3. LOANS HELD FOR SALE The Company purchases and originates residential mortgage loans through its AmeriHome mortgage banking business channel that are held for sale or securitization. The following is a summary of loans HFS by type: March 31, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 764 498 Total government-insured or guaranteed 764 500 Agency-conforming 1,067 899 Non-agency 10 3 Total loans HFS $ 1,841 $ 1,402 (1) EBO loans are delinquent FHA, VA, or USDA loans purchased from GNMA pools under the terms of the GNMA MBS program that can be repooled when loans are brought current either through the borrower's reperformance or through completion of a loan modification. The following is a summary of the net gain on loan purchase, origination, and sale activities on residential mortgage loans to be sold or securitized: Three Months Ended March 31, 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 188.7 $ 142.4 Net proceeds from sale of loans (1) (160.7) (107.4) Provision for and change in estimate of liability for losses under representations and warranties, net 3.2 2.4 Change in fair value (6.7) 6.6 Change in fair value of derivatives: Unrealized gain (loss) on derivatives 15.3 (22.2) Realized gain on derivatives (8.1) (2.4) Total change in fair value of derivatives 7.2 (24.6) Net gain on residential mortgage loans HFS $ 31.7 $ 19.4 Loan acquisition and origination fees 13.6 12.0 Net gain on loan origination and sale activities $ 45.3 $ 31.4 (1) Represents the difference between cash proceeds received upon settlement and loan basis. 4. LOANS, LEASES AND ALLOWANCE FOR CREDIT LOSSES The composition of the Company's HFI loan portfolio is as follows: March 31, 2024 December 31, 2023 (in millions) Warehouse lending $ 6,915 $ 6,618 Municipal & nonprofit 1,622 1,554 Tech & innovation 2,941 2,808 Equity fund resources 695 845 Other commercial and industrial 7,754 7,452 CRE - owner occupied 1,707 1,658 Hotel franchise finance 3,556 3,855 Other CRE - non-owner occupied 6,365 5,974 Residential 13,078 13,287 Residential - EBO 1,171 1,223 Construction and land development 4,746 4,862 Other 150 161 Total loans HFI 50,700 50,297 Allowance for credit losses (340) (337) Total loans HFI, net of allowance $ 50,360 $ 49,960 Loans classified as HFI are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, premiums and discounts on acquired and purchased loans, and an ACL. Net deferred fees of $102 million and $108 million reduced the carrying value of loans as of March 31, 2024 and December 31, 2023, respectively. Net unamortized purchase premiums on acquired and purchased loans of $175 million and $177 million increased the carrying value of loans as of March 31, 2024 and December 31, 2023, respectively. Nonaccrual and Past Due Loans Loans are placed on nonaccrual status when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely, generally when the loan becomes 90 days or more past due. The following tables present nonperforming loan balances by loan portfolio segment: March 31, 2024 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — Tech & innovation 34 28 62 — Other commercial and industrial 15 20 35 6 CRE - owner occupied 8 2 10 — Hotel franchise finance — 12 12 — Other CRE - non-owner occupied 174 1 175 — Residential — 79 79 — Residential - EBO — — — 349 Construction and land development 19 1 20 — Other 1 — 1 — Total $ 251 $ 148 $ 399 $ 355 Loans contractually delinquent by 90 days or more and still accruing totaled $355 million at March 31, 2024 and primarily consisted of government guaranteed EBO residential loans. December 31, 2023 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 6 $ 6 $ — Tech & innovation 23 10 33 — Other commercial and industrial 19 34 53 — CRE - owner occupied 8 1 9 — Other CRE - non-owner occupied 82 1 83 — Residential — 70 70 — Residential - EBO — — — 399 Construction and land development 19 — 19 42 Total $ 151 $ 122 $ 273 $ 441 Loans contractually delinquent by 90 days or more and still accruing totaled $441 million at December 31, 2023 and consisted of government guaranteed EBO residential loans and construction and land development loans. The reduction in interest income associated with loans on nonaccrual status was approximately $4.9 million and $0.8 million for the three months ended March 31, 2024 and 2023. The following table presents an aging analysis of past due loans by loan portfolio segment: March 31, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,915 $ — $ — $ — $ — $ 6,915 Municipal & nonprofit 1,622 — — — — 1,622 Tech & innovation 2,941 — — — — 2,941 Equity fund resources 695 — — — — 695 Other commercial and industrial 7,743 5 — 6 11 7,754 CRE - owner occupied 1,706 — 1 — 1 1,707 Hotel franchise finance 3,556 — — — — 3,556 Other CRE - non-owner occupied 6,339 26 — — 26 6,365 Residential 13,002 66 10 — 76 13,078 Residential - EBO 598 138 86 349 573 1,171 Construction and land development 4,741 5 — — 5 4,746 Other 147 3 — — 3 150 Total loans $ 50,005 $ 243 $ 97 $ 355 $ 695 $ 50,700 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 1,554 Tech & innovation 2,808 — — — — 2,808 Equity fund resources 845 — — — — 845 Other commercial and industrial 7,439 13 — — 13 7,452 CRE - owner occupied 1,627 — 31 — 31 1,658 Hotel franchise finance 3,824 15 16 — 31 3,855 Other CRE - non-owner occupied 5,974 — — — — 5,974 Residential 13,199 68 20 — 88 13,287 Residential - EBO 545 173 106 399 678 1,223 Construction and land development 4,820 — — 42 42 4,862 Other 160 1 — — 1 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 50,297 Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually to classify the loans as to credit risk. This analysis is performed on a quarterly basis. The following tables present risk ratings by loan portfolio segment and origination year. The origination year is the year of origination or renewal. Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 17 $ 550 $ 338 $ 7 $ 285 $ — $ 5,695 $ 6,892 Special mention — — 23 — — — — 23 Classified — — — — — — — — Total $ 17 $ 550 $ 361 $ 7 $ 285 $ — $ 5,695 $ 6,915 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 59 $ 113 $ 200 $ 166 $ 168 $ 893 $ — $ 1,599 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 59 $ 113 $ 207 $ 166 $ 179 $ 898 $ — $ 1,622 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 256 $ 756 $ 650 $ 171 $ 25 $ 101 $ 815 $ 2,774 Special mention — 9 30 10 — — 8 57 Classified — 13 50 1 5 — 41 110 Total $ 256 $ 778 $ 730 $ 182 $ 30 $ 101 $ 864 $ 2,941 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Equity fund resources Pass $ 19 $ 78 $ 92 $ 40 $ 2 $ — $ 463 $ 694 Special mention — — — — — — — — Classified — — — — 1 — — 1 Total $ 19 $ 78 $ 92 $ 40 $ 3 $ — $ 463 $ 695 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 570 $ 1,533 $ 1,348 $ 503 $ 153 $ 236 $ 3,242 $ 7,585 Special mention — — 1 — — 1 — 2 Classified 1 88 24 48 1 4 1 167 Total $ 571 $ 1,621 $ 1,373 $ 551 $ 154 $ 241 $ 3,243 $ 7,754 Current period gross charge-offs $ — $ — $ 0.1 $ 2.0 $ — $ 0.1 $ 0.1 $ 2.3 CRE - owner occupied Pass $ 35 $ 180 $ 377 $ 320 $ 155 $ 551 $ 40 $ 1,658 Special mention — — 2 — — — — 2 Classified — 2 1 4 1 39 — 47 Total $ 35 $ 182 $ 380 $ 324 $ 156 $ 590 $ 40 $ 1,707 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 97 $ 563 $ 1,449 $ 474 $ 94 $ 571 $ 132 $ 3,380 Special mention — 34 — 67 — — — 101 Classified — — — 20 — 55 — 75 Total $ 97 $ 597 $ 1,449 $ 561 $ 94 $ 626 $ 132 $ 3,556 Current period gross charge-offs $ — $ — $ — $ 1.4 $ — $ 1.5 $ — $ 2.9 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 452 $ 1,678 $ 1,862 $ 780 $ 413 $ 346 $ 446 $ 5,977 Special mention — 94 49 — 40 — — 183 Classified — 98 — 93 1 13 — 205 Total $ 452 $ 1,870 $ 1,911 $ 873 $ 454 $ 359 $ 446 $ 6,365 Current period gross charge-offs $ — $ — $ — $ 5.0 $ — $ — $ — $ 5.0 Residential Pass $ 78 $ 278 $ 3,513 $ 7,890 $ 805 $ 458 $ 23 $ 13,045 Special mention — — — — — — — — Classified — — 32 35 5 7 — 79 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 78 $ 278 $ 3,545 $ 7,925 $ 810 $ 465 $ 23 $ 13,078 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Special mention — — — — — — — — Classified — — — — — — — — Total $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 68 $ 906 $ 2,085 $ 325 $ 11 $ — $ 1,276 $ 4,671 Special mention — — 5 — — — — 5 Classified — — 19 — 51 — — 70 Total $ 68 $ 906 $ 2,109 $ 325 $ 62 $ — $ 1,276 $ 4,746 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 2 $ 1 $ 10 $ 2 $ 11 $ 68 $ 52 $ 146 Special mention — — — — — 3 — 3 Classified — — — — — 1 — 1 Total $ 2 $ 1 $ 10 $ 2 $ 11 $ 72 $ 52 $ 150 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Total by Risk Category Pass $ 1,653 $ 6,647 $ 11,941 $ 10,898 $ 2,635 $ 3,634 $ 12,184 $ 49,592 Special mention — 137 117 77 51 4 8 394 Classified 1 201 126 201 65 124 42 760 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 1,654 $ 6,985 $ 12,184 $ 11,176 $ 2,751 $ 3,762 $ 12,234 $ 50,700 Current period gross charge-offs $ — $ — $ 0.1 $ 8.4 $ — $ 1.6 $ 0.1 $ 10.2 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Warehouse lending Pass $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,391 $ 6,592 Special mention — — — — — — 26 26 Classified — — — — — — — — Total $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,417 $ 6,618 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 102 $ 167 $ 176 $ 169 $ 68 $ 848 $ — $ 1,530 Special mention — 7 — 11 — — — 18 Classified — — — — 6 — — 6 Total $ 102 $ 174 $ 176 $ 180 $ 74 $ 848 $ — $ 1,554 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 758 $ 774 $ 206 $ 22 $ 66 $ 38 $ 816 $ 2,680 Special mention 5 30 12 — — — 1 48 Classified 15 52 1 5 — — 7 80 Total $ 778 $ 856 $ 219 $ 27 $ 66 $ 38 $ 824 $ 2,808 Current period gross charge-offs $ 1.8 $ — $ — $ — $ — $ — $ — $ 1.8 Equity fund resources Pass $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Special mention — — — — — — — — Classified — — — — — — — — Total $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 1,610 $ 1,454 $ 559 $ 185 $ 77 $ 196 $ 3,186 $ 7,267 Special mention 90 1 1 — — — 1 93 Classified 1 25 59 2 4 — 1 92 Total $ 1,701 $ 1,480 $ 619 $ 187 $ 81 $ 196 $ 3,188 $ 7,452 Current period gross charge-offs $ — $ — $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 7.3 CRE - owner occupied Pass $ 165 $ 344 $ 322 $ 163 $ 132 $ 444 $ 40 $ 1,610 Special mention — — — — — 1 — 1 Classified 2 1 4 1 1 38 — 47 Total $ 167 $ 345 $ 326 $ 164 $ 133 $ 483 $ 40 $ 1,658 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 593 $ 1,535 $ 566 $ 95 $ 419 $ 165 $ 132 $ 3,505 Special mention 34 — 66 — 35 68 — 203 Classified 24 8 48 — 43 24 — 147 Total $ 651 $ 1,543 $ 680 $ 95 $ 497 $ 257 $ 132 $ 3,855 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other CRE - non-owner occupied Pass $ 1,832 $ 1,784 $ 754 $ 457 $ 166 $ 206 $ 387 $ 5,586 Special mention 164 — 16 43 28 — — 251 Classified 28 — 93 1 14 1 — 137 Total $ 2,024 $ 1,784 $ 863 $ 501 $ 208 $ 207 $ 387 $ 5,974 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Residential Pass $ 324 $ 3,573 $ 7,985 $ 819 $ 270 $ 207 $ 20 $ 13,198 Special mention — — — — — — — — Classified 1 26 33 4 4 2 — 70 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 325 $ 3,599 $ 8,018 $ 823 $ 274 $ 209 $ 20 $ 13,287 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Special mention — — — — — — — — Classified — — — — — — — — Total $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 1,013 $ 2,231 $ 385 $ 10 $ — $ — $ 1,151 $ 4,790 Special mention — — — — — — — — Classified 1 19 — 52 — — — 72 Total $ 1,014 $ 2,250 $ 385 $ 62 $ — $ — $ 1,151 $ 4,862 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 4 $ 10 $ 3 $ 11 $ 3 $ 62 $ 66 $ 159 Special mention — — — — — 1 — 1 Classified — — — — — 1 — 1 Total $ 4 $ 10 $ 3 $ 11 $ 3 $ 64 $ 66 $ 161 Current period gross charge-offs $ — $ 0.1 $ — $ — $ — $ — $ — $ 0.1 Total by Risk Category Pass $ 7,139 $ 12,265 $ 11,211 $ 2,757 $ 1,433 $ 2,387 $ 11,793 $ 48,985 Special mention 293 38 95 54 63 70 28 641 Classified 72 131 238 65 72 66 8 652 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 7,504 $ 12,434 $ 11,544 $ 2,876 $ 1,568 $ 2,523 $ 11,829 $ 50,297 Current period gross charge-offs $ 1.8 $ 0.1 $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 9.2 Restructurings for Borrowers Experiencing Financial Difficulty The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at March 31, 2024 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 30 $ 30 1.0 % Other commercial and industrial — 8 — 8 0.1 CRE - owner occupied — 31 — 31 1.8 Construction and land development — 39 — 39 0.8 Total $ — $ 78 $ 30 $ 108 0.2 % Amortized Cost Basis at March 31, 2023 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ 5 $ 7 0.3 % Hotel franchise finance — 18 — 18 0.5 % Residential — — 1 1 0.0 % Total $ 2 $ 18 $ 6 $ 26 0.1 % The performance of these modified loans is monitored for 12 months following the modification. As of March 31, 2024, modified loans of $129 million were current with contractual payments and $129 million were on nonaccrual status. As of December 31, 2023, modified loans of $95 million were current with contractual payments and $111 million were on nonaccrual status. In the normal course of business, the Company also modifies EBO loans, which are delinquent FHA, VA, or USDA insured or guaranteed loans repurchased under the terms of the GNMA MBS program and can be repooled or resold when loans are brought current. During the three months ended March 31, 2024 and 2023, the Company completed modifications of EBO loans with an amortized cost of $90 million and $57 million, respectively. These modifications were largely payment delays and term extensions. Certain of these loans were repooled or resold after modification and are no longer included in the pool of loan modifications being monitored for future performance. As of March 31, 2024, modified EBO loans consisted of $38 million in loans that were current to 89 days delinquent and $12 million in loans greater than 90 days delinquent. As of December 31, 2023, modified EBO loans consisted of $26 million in loans that were current to 89 days delinquent and $12 million in loans greater than 90 days delinquent. Collateral-Dependent Loans The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: March 31, 2024 December 31, 2023 Real Estate Collateral Other Collateral Total Real Estate Collateral Other Collateral Total (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — $ 6 $ 6 Tech & innovation — 35 35 — — — Other commercial and industrial — 26 26 — 29 29 CRE - owner occupied 42 — 42 43 — 43 Hotel franchise finance 63 — 63 104 — 104 Other CRE - non-owner occupied 204 — 204 136 — 136 Construction and land development 69 — 69 71 — 71 Total $ 378 $ 66 $ 444 $ 354 $ 35 $ 389 The Company did not identify any significant changes in the extent to which collateral secures its collateral dependent loans, whether in the form of general deterioration or from other factors during the period ended March 31, 2024. Allowance for Credit Losses The ACL consists of the ACL on funded loans HFI and an ACL on unfunded loan commitments. The ACL on HTM securities is estimated separately from loans, see "Note 2. Investment Securities" of these Notes to Unaudited Consolidated Financial Statements for further discussion. Management considers the level of ACL to be a reasonable and supportable estimate of expected credit losses inherent within the Company's HFI loan portfolio as of March 31, 2024. The below tables reflect the activity in the ACL on loans HFI by loan portfolio segment, which includes an estimate of future recoveries: Three Months Ended March 31, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 1.5 $ — $ — $ 7.3 Municipal & nonprofit 14.7 (0.8) — — 13.9 Tech & innovation 42.1 5.9 — — 48.0 Equity fund resources 1.3 (0.1) — — 1.2 Other commercial and industrial 81.4 (12.4) 2.3 (0.4) 67.1 CRE - owner occupied 6.0 0.2 — — 6.2 Hotel franchise finance 33.4 5.3 2.9 — 35.8 Other CRE - non-owner occupied 96.0 13.7 5.0 — 104.7 Residential 23.1 (1.0) — — 22.1 Residential - EBO — — — — — Construction and land development 30.4 1.5 — — 31.9 Other 2.5 (0.4) — — 2.1 Total $ 336.7 $ 13.4 $ 10.2 $ (0.4) $ 340.3 Three Months Ended March 31, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (1.8) $ — $ — $ 6.6 Municipal & nonprofit 15.9 2.5 — — 18.4 Tech & innovation 30.8 7.4 1.8 — 36.4 Equity fund resources 6.4 (3.1) — — 3.3 Other commercial and industrial 85.9 (30.7) 7.3 (3.2) 51.1 CRE - owner occupied 7.1 1.5 — — 8.6 Hotel franchise finance 46.9 0.8 — — 47.7 Other CRE - non-owner occupied 47.4 19.0 — — 66.4 Residential 30.4 1.3 — — 31.7 Residential - EBO — — — — — Construction and land development 27.4 4.1 — — 31.5 Other 3.1 — 0.1 — 3.0 Total $ 309.7 $ 1.0 $ 9.2 $ (3.2) $ 304.7 Accrued interest receivable of $278 million and $281 million at March 31, 2024 and December 31, 2023, respectively, was excluded from the estimate of credit losses. Whereas, accrued interest receivable related to the Company's Residential-EBO loan portfolio segment was included in the estimate of credit losses and had an allowance of $3 million and $4 million as of March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable, net of any allowance, is included in Other assets on the Consolidated Balance Sheet. In addition to the ACL on funded loans HFI, the Company maintains a separate ACL related to off-balance sheet credit exposures, including unfunded loan commitments. This allowance is included in Other liabilities on the Consolidated Balance Sheet. The below table reflects the activity in the ACL on unfunded loan commitments: Three Months Ended March 31, 2024 2023 (in millions) Balance, beginning of period $ 31.6 $ 47.0 Provision for (Recovery of) credit losses 1.5 (2.2) Balance, end of period $ 33.1 $ 44.8 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: March 31, 2024 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,915 $ — $ 6,915 $ 7.3 $ — $ 7.3 Municipal & nonprofit 1,617 5 1,622 13.2 0.7 13.9 Tech & innovation 2,832 109 2,941 40.8 7.2 48.0 Equity fund resources 695 — 695 1.2 — 1.2 Other commercial and industrial 7,591 163 7,754 62.5 4.6 67.1 CRE - owner occupied 1,664 43 1,707 6.2 — 6.2 Hotel franchise finance 3,481 75 3,556 35.4 0.4 35.8 Other CRE - non-owner occupied 6,161 204 6,365 104.7 — 104.7 Residential 13,078 — 13,078 22.1 — 22.1 Residential EBO 1,171 — 1,171 — — — Construction and land development 4,676 70 4,746 31.9 — 31.9 Other 149 1 150 2.1 — 2.1 Total $ 50,030 $ 670 $ 50,700 $ 327.4 $ 12.9 $ 340.3 December 31, 2023 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,618 $ — $ 6,618 $ 5.8 $ — $ 5.8 Municipal & nonprofit 1,548 6 1,554 13.7 1.0 14.7 Tech & innovation 2,729 79 2,808 38.3 3.8 42.1 Equity fund resources 845 — 845 1.3 — 1.3 Other commercial and industrial 7,362 90 7,452 64.6 16.8 81.4 CRE - owner occupied 1,613 45 1,658 6.0 — 6.0 Hotel franchise finance 3,708 147 3,855 33.4 — 33.4 Other CRE - non-owner occupied 5,838 136 5,974 96.0 — 96.0 Residential 13,287 — 13,287 23.1 — 23.1 Residential EBO 1,223 — 1,223 — — — Construction and land development 4,791 71 4,862 30.4 — 30.4 Other 161 — 161 2.5 — 2.5 Total $ 49,723 $ 574 $ 50,297 $ 315.1 $ 21.6 $ 336.7 Loan Purchases and Sales During the three months ended March 31, 2024 and 2023, loan purchases totaled $389 million and $511 million, respectively, and consisted primarily of commercial and industrial and residential loans. There were no loans purchased with more-than-insignificant deterioration in credit quality during the three months ended March 31, 2024 and 2023. During the three months ended March 31, 2024, the Company sold loans with a carrying value of approximately $148 million and recognized a charge-off of $1.4 million and a net loss of $4.9 million on these loan sales. During the three months ended March 31, 2023, the Company transferred $6.9 billion of loans HFI (primarily commercial and industrial loans) to HFS and sold $915 million of those loans. The Company recognized a net loss of $140.8 million on these loan transfers and sales during the three months ended March 31, 2023.

Loans, Leases and Allowance for

Loans, Leases and Allowance for Credit Losses	3 Months Ended
Loans, Leases and Allowance for Credit Losses	Mar. 31, 2024
Receivables [Abstract]
Loans, Leases and Allowance for Credit Losses	3. LOANS HELD FOR SALE The Company purchases and originates residential mortgage loans through its AmeriHome mortgage banking business channel that are held for sale or securitization. The following is a summary of loans HFS by type: March 31, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 764 498 Total government-insured or guaranteed 764 500 Agency-conforming 1,067 899 Non-agency 10 3 Total loans HFS $ 1,841 $ 1,402 (1) EBO loans are delinquent FHA, VA, or USDA loans purchased from GNMA pools under the terms of the GNMA MBS program that can be repooled when loans are brought current either through the borrower's reperformance or through completion of a loan modification. The following is a summary of the net gain on loan purchase, origination, and sale activities on residential mortgage loans to be sold or securitized: Three Months Ended March 31, 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 188.7 $ 142.4 Net proceeds from sale of loans (1) (160.7) (107.4) Provision for and change in estimate of liability for losses under representations and warranties, net 3.2 2.4 Change in fair value (6.7) 6.6 Change in fair value of derivatives: Unrealized gain (loss) on derivatives 15.3 (22.2) Realized gain on derivatives (8.1) (2.4) Total change in fair value of derivatives 7.2 (24.6) Net gain on residential mortgage loans HFS $ 31.7 $ 19.4 Loan acquisition and origination fees 13.6 12.0 Net gain on loan origination and sale activities $ 45.3 $ 31.4 (1) Represents the difference between cash proceeds received upon settlement and loan basis. 4. LOANS, LEASES AND ALLOWANCE FOR CREDIT LOSSES The composition of the Company's HFI loan portfolio is as follows: March 31, 2024 December 31, 2023 (in millions) Warehouse lending $ 6,915 $ 6,618 Municipal & nonprofit 1,622 1,554 Tech & innovation 2,941 2,808 Equity fund resources 695 845 Other commercial and industrial 7,754 7,452 CRE - owner occupied 1,707 1,658 Hotel franchise finance 3,556 3,855 Other CRE - non-owner occupied 6,365 5,974 Residential 13,078 13,287 Residential - EBO 1,171 1,223 Construction and land development 4,746 4,862 Other 150 161 Total loans HFI 50,700 50,297 Allowance for credit losses (340) (337) Total loans HFI, net of allowance $ 50,360 $ 49,960 Loans classified as HFI are stated at the amount of unpaid principal, adjusted for net deferred fees and costs, premiums and discounts on acquired and purchased loans, and an ACL. Net deferred fees of $102 million and $108 million reduced the carrying value of loans as of March 31, 2024 and December 31, 2023, respectively. Net unamortized purchase premiums on acquired and purchased loans of $175 million and $177 million increased the carrying value of loans as of March 31, 2024 and December 31, 2023, respectively. Nonaccrual and Past Due Loans Loans are placed on nonaccrual status when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely, generally when the loan becomes 90 days or more past due. The following tables present nonperforming loan balances by loan portfolio segment: March 31, 2024 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — Tech & innovation 34 28 62 — Other commercial and industrial 15 20 35 6 CRE - owner occupied 8 2 10 — Hotel franchise finance — 12 12 — Other CRE - non-owner occupied 174 1 175 — Residential — 79 79 — Residential - EBO — — — 349 Construction and land development 19 1 20 — Other 1 — 1 — Total $ 251 $ 148 $ 399 $ 355 Loans contractually delinquent by 90 days or more and still accruing totaled $355 million at March 31, 2024 and primarily consisted of government guaranteed EBO residential loans. December 31, 2023 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 6 $ 6 $ — Tech & innovation 23 10 33 — Other commercial and industrial 19 34 53 — CRE - owner occupied 8 1 9 — Other CRE - non-owner occupied 82 1 83 — Residential — 70 70 — Residential - EBO — — — 399 Construction and land development 19 — 19 42 Total $ 151 $ 122 $ 273 $ 441 Loans contractually delinquent by 90 days or more and still accruing totaled $441 million at December 31, 2023 and consisted of government guaranteed EBO residential loans and construction and land development loans. The reduction in interest income associated with loans on nonaccrual status was approximately $4.9 million and $0.8 million for the three months ended March 31, 2024 and 2023. The following table presents an aging analysis of past due loans by loan portfolio segment: March 31, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,915 $ — $ — $ — $ — $ 6,915 Municipal & nonprofit 1,622 — — — — 1,622 Tech & innovation 2,941 — — — — 2,941 Equity fund resources 695 — — — — 695 Other commercial and industrial 7,743 5 — 6 11 7,754 CRE - owner occupied 1,706 — 1 — 1 1,707 Hotel franchise finance 3,556 — — — — 3,556 Other CRE - non-owner occupied 6,339 26 — — 26 6,365 Residential 13,002 66 10 — 76 13,078 Residential - EBO 598 138 86 349 573 1,171 Construction and land development 4,741 5 — — 5 4,746 Other 147 3 — — 3 150 Total loans $ 50,005 $ 243 $ 97 $ 355 $ 695 $ 50,700 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 1,554 Tech & innovation 2,808 — — — — 2,808 Equity fund resources 845 — — — — 845 Other commercial and industrial 7,439 13 — — 13 7,452 CRE - owner occupied 1,627 — 31 — 31 1,658 Hotel franchise finance 3,824 15 16 — 31 3,855 Other CRE - non-owner occupied 5,974 — — — — 5,974 Residential 13,199 68 20 — 88 13,287 Residential - EBO 545 173 106 399 678 1,223 Construction and land development 4,820 — — 42 42 4,862 Other 160 1 — — 1 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 50,297 Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually to classify the loans as to credit risk. This analysis is performed on a quarterly basis. The following tables present risk ratings by loan portfolio segment and origination year. The origination year is the year of origination or renewal. Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 17 $ 550 $ 338 $ 7 $ 285 $ — $ 5,695 $ 6,892 Special mention — — 23 — — — — 23 Classified — — — — — — — — Total $ 17 $ 550 $ 361 $ 7 $ 285 $ — $ 5,695 $ 6,915 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 59 $ 113 $ 200 $ 166 $ 168 $ 893 $ — $ 1,599 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 59 $ 113 $ 207 $ 166 $ 179 $ 898 $ — $ 1,622 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 256 $ 756 $ 650 $ 171 $ 25 $ 101 $ 815 $ 2,774 Special mention — 9 30 10 — — 8 57 Classified — 13 50 1 5 — 41 110 Total $ 256 $ 778 $ 730 $ 182 $ 30 $ 101 $ 864 $ 2,941 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Equity fund resources Pass $ 19 $ 78 $ 92 $ 40 $ 2 $ — $ 463 $ 694 Special mention — — — — — — — — Classified — — — — 1 — — 1 Total $ 19 $ 78 $ 92 $ 40 $ 3 $ — $ 463 $ 695 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 570 $ 1,533 $ 1,348 $ 503 $ 153 $ 236 $ 3,242 $ 7,585 Special mention — — 1 — — 1 — 2 Classified 1 88 24 48 1 4 1 167 Total $ 571 $ 1,621 $ 1,373 $ 551 $ 154 $ 241 $ 3,243 $ 7,754 Current period gross charge-offs $ — $ — $ 0.1 $ 2.0 $ — $ 0.1 $ 0.1 $ 2.3 CRE - owner occupied Pass $ 35 $ 180 $ 377 $ 320 $ 155 $ 551 $ 40 $ 1,658 Special mention — — 2 — — — — 2 Classified — 2 1 4 1 39 — 47 Total $ 35 $ 182 $ 380 $ 324 $ 156 $ 590 $ 40 $ 1,707 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 97 $ 563 $ 1,449 $ 474 $ 94 $ 571 $ 132 $ 3,380 Special mention — 34 — 67 — — — 101 Classified — — — 20 — 55 — 75 Total $ 97 $ 597 $ 1,449 $ 561 $ 94 $ 626 $ 132 $ 3,556 Current period gross charge-offs $ — $ — $ — $ 1.4 $ — $ 1.5 $ — $ 2.9 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 452 $ 1,678 $ 1,862 $ 780 $ 413 $ 346 $ 446 $ 5,977 Special mention — 94 49 — 40 — — 183 Classified — 98 — 93 1 13 — 205 Total $ 452 $ 1,870 $ 1,911 $ 873 $ 454 $ 359 $ 446 $ 6,365 Current period gross charge-offs $ — $ — $ — $ 5.0 $ — $ — $ — $ 5.0 Residential Pass $ 78 $ 278 $ 3,513 $ 7,890 $ 805 $ 458 $ 23 $ 13,045 Special mention — — — — — — — — Classified — — 32 35 5 7 — 79 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 78 $ 278 $ 3,545 $ 7,925 $ 810 $ 465 $ 23 $ 13,078 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Special mention — — — — — — — — Classified — — — — — — — — Total $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 68 $ 906 $ 2,085 $ 325 $ 11 $ — $ 1,276 $ 4,671 Special mention — — 5 — — — — 5 Classified — — 19 — 51 — — 70 Total $ 68 $ 906 $ 2,109 $ 325 $ 62 $ — $ 1,276 $ 4,746 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 2 $ 1 $ 10 $ 2 $ 11 $ 68 $ 52 $ 146 Special mention — — — — — 3 — 3 Classified — — — — — 1 — 1 Total $ 2 $ 1 $ 10 $ 2 $ 11 $ 72 $ 52 $ 150 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Total by Risk Category Pass $ 1,653 $ 6,647 $ 11,941 $ 10,898 $ 2,635 $ 3,634 $ 12,184 $ 49,592 Special mention — 137 117 77 51 4 8 394 Classified 1 201 126 201 65 124 42 760 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 1,654 $ 6,985 $ 12,184 $ 11,176 $ 2,751 $ 3,762 $ 12,234 $ 50,700 Current period gross charge-offs $ — $ — $ 0.1 $ 8.4 $ — $ 1.6 $ 0.1 $ 10.2 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Warehouse lending Pass $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,391 $ 6,592 Special mention — — — — — — 26 26 Classified — — — — — — — — Total $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,417 $ 6,618 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 102 $ 167 $ 176 $ 169 $ 68 $ 848 $ — $ 1,530 Special mention — 7 — 11 — — — 18 Classified — — — — 6 — — 6 Total $ 102 $ 174 $ 176 $ 180 $ 74 $ 848 $ — $ 1,554 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 758 $ 774 $ 206 $ 22 $ 66 $ 38 $ 816 $ 2,680 Special mention 5 30 12 — — — 1 48 Classified 15 52 1 5 — — 7 80 Total $ 778 $ 856 $ 219 $ 27 $ 66 $ 38 $ 824 $ 2,808 Current period gross charge-offs $ 1.8 $ — $ — $ — $ — $ — $ — $ 1.8 Equity fund resources Pass $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Special mention — — — — — — — — Classified — — — — — — — — Total $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 1,610 $ 1,454 $ 559 $ 185 $ 77 $ 196 $ 3,186 $ 7,267 Special mention 90 1 1 — — — 1 93 Classified 1 25 59 2 4 — 1 92 Total $ 1,701 $ 1,480 $ 619 $ 187 $ 81 $ 196 $ 3,188 $ 7,452 Current period gross charge-offs $ — $ — $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 7.3 CRE - owner occupied Pass $ 165 $ 344 $ 322 $ 163 $ 132 $ 444 $ 40 $ 1,610 Special mention — — — — — 1 — 1 Classified 2 1 4 1 1 38 — 47 Total $ 167 $ 345 $ 326 $ 164 $ 133 $ 483 $ 40 $ 1,658 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 593 $ 1,535 $ 566 $ 95 $ 419 $ 165 $ 132 $ 3,505 Special mention 34 — 66 — 35 68 — 203 Classified 24 8 48 — 43 24 — 147 Total $ 651 $ 1,543 $ 680 $ 95 $ 497 $ 257 $ 132 $ 3,855 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other CRE - non-owner occupied Pass $ 1,832 $ 1,784 $ 754 $ 457 $ 166 $ 206 $ 387 $ 5,586 Special mention 164 — 16 43 28 — — 251 Classified 28 — 93 1 14 1 — 137 Total $ 2,024 $ 1,784 $ 863 $ 501 $ 208 $ 207 $ 387 $ 5,974 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Residential Pass $ 324 $ 3,573 $ 7,985 $ 819 $ 270 $ 207 $ 20 $ 13,198 Special mention — — — — — — — — Classified 1 26 33 4 4 2 — 70 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 325 $ 3,599 $ 8,018 $ 823 $ 274 $ 209 $ 20 $ 13,287 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Special mention — — — — — — — — Classified — — — — — — — — Total $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 1,013 $ 2,231 $ 385 $ 10 $ — $ — $ 1,151 $ 4,790 Special mention — — — — — — — — Classified 1 19 — 52 — — — 72 Total $ 1,014 $ 2,250 $ 385 $ 62 $ — $ — $ 1,151 $ 4,862 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 4 $ 10 $ 3 $ 11 $ 3 $ 62 $ 66 $ 159 Special mention — — — — — 1 — 1 Classified — — — — — 1 — 1 Total $ 4 $ 10 $ 3 $ 11 $ 3 $ 64 $ 66 $ 161 Current period gross charge-offs $ — $ 0.1 $ — $ — $ — $ — $ — $ 0.1 Total by Risk Category Pass $ 7,139 $ 12,265 $ 11,211 $ 2,757 $ 1,433 $ 2,387 $ 11,793 $ 48,985 Special mention 293 38 95 54 63 70 28 641 Classified 72 131 238 65 72 66 8 652 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 7,504 $ 12,434 $ 11,544 $ 2,876 $ 1,568 $ 2,523 $ 11,829 $ 50,297 Current period gross charge-offs $ 1.8 $ 0.1 $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 9.2 Restructurings for Borrowers Experiencing Financial Difficulty The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at March 31, 2024 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 30 $ 30 1.0 % Other commercial and industrial — 8 — 8 0.1 CRE - owner occupied — 31 — 31 1.8 Construction and land development — 39 — 39 0.8 Total $ — $ 78 $ 30 $ 108 0.2 % Amortized Cost Basis at March 31, 2023 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ 5 $ 7 0.3 % Hotel franchise finance — 18 — 18 0.5 % Residential — — 1 1 0.0 % Total $ 2 $ 18 $ 6 $ 26 0.1 % The performance of these modified loans is monitored for 12 months following the modification. As of March 31, 2024, modified loans of $129 million were current with contractual payments and $129 million were on nonaccrual status. As of December 31, 2023, modified loans of $95 million were current with contractual payments and $111 million were on nonaccrual status. In the normal course of business, the Company also modifies EBO loans, which are delinquent FHA, VA, or USDA insured or guaranteed loans repurchased under the terms of the GNMA MBS program and can be repooled or resold when loans are brought current. During the three months ended March 31, 2024 and 2023, the Company completed modifications of EBO loans with an amortized cost of $90 million and $57 million, respectively. These modifications were largely payment delays and term extensions. Certain of these loans were repooled or resold after modification and are no longer included in the pool of loan modifications being monitored for future performance. As of March 31, 2024, modified EBO loans consisted of $38 million in loans that were current to 89 days delinquent and $12 million in loans greater than 90 days delinquent. As of December 31, 2023, modified EBO loans consisted of $26 million in loans that were current to 89 days delinquent and $12 million in loans greater than 90 days delinquent. Collateral-Dependent Loans The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: March 31, 2024 December 31, 2023 Real Estate Collateral Other Collateral Total Real Estate Collateral Other Collateral Total (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — $ 6 $ 6 Tech & innovation — 35 35 — — — Other commercial and industrial — 26 26 — 29 29 CRE - owner occupied 42 — 42 43 — 43 Hotel franchise finance 63 — 63 104 — 104 Other CRE - non-owner occupied 204 — 204 136 — 136 Construction and land development 69 — 69 71 — 71 Total $ 378 $ 66 $ 444 $ 354 $ 35 $ 389 The Company did not identify any significant changes in the extent to which collateral secures its collateral dependent loans, whether in the form of general deterioration or from other factors during the period ended March 31, 2024. Allowance for Credit Losses The ACL consists of the ACL on funded loans HFI and an ACL on unfunded loan commitments. The ACL on HTM securities is estimated separately from loans, see "Note 2. Investment Securities" of these Notes to Unaudited Consolidated Financial Statements for further discussion. Management considers the level of ACL to be a reasonable and supportable estimate of expected credit losses inherent within the Company's HFI loan portfolio as of March 31, 2024. The below tables reflect the activity in the ACL on loans HFI by loan portfolio segment, which includes an estimate of future recoveries: Three Months Ended March 31, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 1.5 $ — $ — $ 7.3 Municipal & nonprofit 14.7 (0.8) — — 13.9 Tech & innovation 42.1 5.9 — — 48.0 Equity fund resources 1.3 (0.1) — — 1.2 Other commercial and industrial 81.4 (12.4) 2.3 (0.4) 67.1 CRE - owner occupied 6.0 0.2 — — 6.2 Hotel franchise finance 33.4 5.3 2.9 — 35.8 Other CRE - non-owner occupied 96.0 13.7 5.0 — 104.7 Residential 23.1 (1.0) — — 22.1 Residential - EBO — — — — — Construction and land development 30.4 1.5 — — 31.9 Other 2.5 (0.4) — — 2.1 Total $ 336.7 $ 13.4 $ 10.2 $ (0.4) $ 340.3 Three Months Ended March 31, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (1.8) $ — $ — $ 6.6 Municipal & nonprofit 15.9 2.5 — — 18.4 Tech & innovation 30.8 7.4 1.8 — 36.4 Equity fund resources 6.4 (3.1) — — 3.3 Other commercial and industrial 85.9 (30.7) 7.3 (3.2) 51.1 CRE - owner occupied 7.1 1.5 — — 8.6 Hotel franchise finance 46.9 0.8 — — 47.7 Other CRE - non-owner occupied 47.4 19.0 — — 66.4 Residential 30.4 1.3 — — 31.7 Residential - EBO — — — — — Construction and land development 27.4 4.1 — — 31.5 Other 3.1 — 0.1 — 3.0 Total $ 309.7 $ 1.0 $ 9.2 $ (3.2) $ 304.7 Accrued interest receivable of $278 million and $281 million at March 31, 2024 and December 31, 2023, respectively, was excluded from the estimate of credit losses. Whereas, accrued interest receivable related to the Company's Residential-EBO loan portfolio segment was included in the estimate of credit losses and had an allowance of $3 million and $4 million as of March 31, 2024 and December 31, 2023, respectively. Accrued interest receivable, net of any allowance, is included in Other assets on the Consolidated Balance Sheet. In addition to the ACL on funded loans HFI, the Company maintains a separate ACL related to off-balance sheet credit exposures, including unfunded loan commitments. This allowance is included in Other liabilities on the Consolidated Balance Sheet. The below table reflects the activity in the ACL on unfunded loan commitments: Three Months Ended March 31, 2024 2023 (in millions) Balance, beginning of period $ 31.6 $ 47.0 Provision for (Recovery of) credit losses 1.5 (2.2) Balance, end of period $ 33.1 $ 44.8 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: March 31, 2024 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,915 $ — $ 6,915 $ 7.3 $ — $ 7.3 Municipal & nonprofit 1,617 5 1,622 13.2 0.7 13.9 Tech & innovation 2,832 109 2,941 40.8 7.2 48.0 Equity fund resources 695 — 695 1.2 — 1.2 Other commercial and industrial 7,591 163 7,754 62.5 4.6 67.1 CRE - owner occupied 1,664 43 1,707 6.2 — 6.2 Hotel franchise finance 3,481 75 3,556 35.4 0.4 35.8 Other CRE - non-owner occupied 6,161 204 6,365 104.7 — 104.7 Residential 13,078 — 13,078 22.1 — 22.1 Residential EBO 1,171 — 1,171 — — — Construction and land development 4,676 70 4,746 31.9 — 31.9 Other 149 1 150 2.1 — 2.1 Total $ 50,030 $ 670 $ 50,700 $ 327.4 $ 12.9 $ 340.3 December 31, 2023 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,618 $ — $ 6,618 $ 5.8 $ — $ 5.8 Municipal & nonprofit 1,548 6 1,554 13.7 1.0 14.7 Tech & innovation 2,729 79 2,808 38.3 3.8 42.1 Equity fund resources 845 — 845 1.3 — 1.3 Other commercial and industrial 7,362 90 7,452 64.6 16.8 81.4 CRE - owner occupied 1,613 45 1,658 6.0 — 6.0 Hotel franchise finance 3,708 147 3,855 33.4 — 33.4 Other CRE - non-owner occupied 5,838 136 5,974 96.0 — 96.0 Residential 13,287 — 13,287 23.1 — 23.1 Residential EBO 1,223 — 1,223 — — — Construction and land development 4,791 71 4,862 30.4 — 30.4 Other 161 — 161 2.5 — 2.5 Total $ 49,723 $ 574 $ 50,297 $ 315.1 $ 21.6 $ 336.7 Loan Purchases and Sales During the three months ended March 31, 2024 and 2023, loan purchases totaled $389 million and $511 million, respectively, and consisted primarily of commercial and industrial and residential loans. There were no loans purchased with more-than-insignificant deterioration in credit quality during the three months ended March 31, 2024 and 2023. During the three months ended March 31, 2024, the Company sold loans with a carrying value of approximately $148 million and recognized a charge-off of $1.4 million and a net loss of $4.9 million on these loan sales. During the three months ended March 31, 2023, the Company transferred $6.9 billion of loans HFI (primarily commercial and industrial loans) to HFS and sold $915 million of those loans. The Company recognized a net loss of $140.8 million on these loan transfers and sales during the three months ended March 31, 2023.

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
Mortgage Servicing Rights	Mar. 31, 2024
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	5. MORTGAGE SERVICING RIGHTS The following table presents the changes in fair value of the Company's MSR portfolio related to its mortgage banking business and other information related to its servicing portfolio: Three Months Ended March 31, 2024 2023 (in millions) Balance, beginning of period $ 1,124 $ 1,148 Additions from loans sold with servicing rights retained 189 142 Carrying value of MSRs sold (156) (350) Change in fair value 60 (8) Mark to market adjustments — 3 Realization of cash flows (39) (25) Balance, end of period $ 1,178 $ 910 Unpaid principal balance of mortgage loans serviced for others $ 65,620 $ 58,466 Changes in the fair value of MSRs are recorded as Net loan servicing revenue in the Consolidated Income Statement. Due to the regulatory capital impact of MSRs on capital ratios, the Company sells certain MSRs and related servicing advances in the normal course of business. The Company may also sell excess servicing spread related to certain mortgage loans serviced by the Company. During the three months ended March 31, 2024, MSR sales had an aggregate net sales price of $156 million and the UPB of loans underlying these sales totaled $10.8 billion. During the three months ended March 31, 2023, MSR sales had an aggregate net sales price of $350 million and the UPB of loans underlying these sales totaled $19.5 billion. As of March 31, 2024 and December 31, 2023, the Company had a remaining receivable balance of $34 million and $41 million, respectively, related to holdbacks on MSR sales for servicing transfers, which are recorded in Other assets on the Consolidated Balance Sheet. The Company receives loan servicing fees, net of subservicing costs, based on the UPB of the underlying loans. Loan servicing fees are collected from payments made by borrowers. The Company may receive other remuneration from rights to various borrower contracted fees, such as late charges, collateral reconveyance charges, and non-sufficient funds fees. Contractually specified servicing fees, late fees, and ancillary income associated with the Company's MSR portfolio totaled $67.0 million for the three months ended March 31, 2024 and $62.9 million for the three months ended March 31, 2023, which are recorded as Net loan servicing revenue in the Consolidated Income Statement. In accordance with its contractual loan servicing obligations, the Company is required to advance funds to or on behalf of investors when borrowers do not make payments. The Company advances property taxes and insurance premiums for borrowers who have insufficient funds in escrow accounts, plus any other costs to preserve real estate properties. The Company may also advance funds to maintain, repair, and market foreclosed real estate properties. The Company is entitled to recover all or a portion of the advances from borrowers of reinstated and performing loans, from the proceeds of liquidated properties or from the government agency or GSE guarantor of charged-off loans. Servicing advances are charged-off when they are deemed to be uncollectible. As of March 31, 2024 and December 31, 2023, net servicing advances totaled $67 million and $87 million, respectively, which are recorded as Other assets on the Consolidated Balance Sheet. The following table presents the effect of hypothetical changes in the fair value of MSRs caused by assumed immediate changes in interest rates, discount rates, and prepayment speeds that are used to determine fair value: March 31, 2024 (in millions) Fair value of mortgage servicing rights $ 1,178 Increase (decrease) in fair value resulting from: Interest rate change of 50 basis points Adverse change (65) Favorable change 57 Discount rate change of 50 basis points Increase (23) Decrease 24 Conditional prepayment rate change of 1% Increase (33) Decrease 36 Cost to service change of 10% Increase (14) Decrease 14

Deposits

Deposits	3 Months Ended
Deposits	Mar. 31, 2024
Other Liabilities Disclosure [Abstract]
Deposits	6. DEPOSITS The table below summarizes deposits by type: March 31, 2024 December 31, 2023 (in millions) Non-interest-bearing demand deposits $ 18,399 $ 14,520 Interest-bearing transaction accounts 16,965 15,916 Savings and money market accounts 16,194 14,791 Time certificates of deposit ($250,000 or more) 1,683 1,478 Other time deposits (1) 8,987 8,628 Total deposits $ 62,228 $ 55,333 (1) Retail brokered time deposits over $250,000 of $5.7 billion and $5.8 billion as of March 31, 2024 and December 31, 2023, respectively, are included within Other time deposits as these deposits are generally participated out by brokers in shares below the FDIC insurance limit. A summary of the contractual maturities for all time deposits as of March 31, 2024 is as follows: (in millions) 2024 $ 8,311 2025 2,328 2026 26 2027 3 2028 1 Thereafter 1 Total $ 10,670 Brokered deposits provide an additional source of deposits and are placed with the Bank through third-party brokers. At March 31, 2024 and December 31, 2023, the Company held wholesale brokered deposits of $6.5 billion and $6.6 billion, respectively, excluding reciprocal deposits. In addition, WAB is a participant in the IntraFi Network, a network that offers deposit placement services such as CDARS and ICS, and other reciprocal deposit networks which offer products that qualify large deposits for FDIC insurance. At March 31, 2024, the Company had $14.5 billion of reciprocal deposits, compared to $13.3 billion at December 31, 2023. In addition, deposits for which the Company provides account holders with earnings credits or referral fees totaled $22.2 billion and $17.8 billion at March 31, 2024 and December 31, 2023, respectively. The Company incurred $131.2 million and $85.6 million in deposit related costs on these deposits during the three months ended March 31, 2024 and 2023, respectively. These costs are reported as Deposit costs in non-interest expense.

Other Borrowings

Other Borrowings	3 Months Ended
Other Borrowings	Mar. 31, 2024
Debt Disclosure [Abstract]
Other Borrowings	7. OTHER BORROWINGS The following table summarizes the Company’s other borrowings by type: March 31, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 5,750 6,200 Repurchase agreements 8 382 Secured borrowings 22 27 Total short-term borrowings $ 5,780 $ 6,784 Long-Term: Credit linked notes, net 441 446 Total long-term borrowings $ 441 $ 446 Total other borrowings $ 6,221 $ 7,230 Short-Term Borrowings Federal Funds Lines of Credit The Company maintains overnight federal fund lines of credit totaling $839 million as of March 31, 2024, which have rates comparable to the federal funds effective rate plus 0.10% to 0.20%. FHLB and FRB Advances The Company also maintains secured overnight lines of credit with the FHLB and the FRB. The Company’s borrowing capacity is determined based on collateral pledged, generally consisting of investment securities and loans, at the time of the borrowing. As of March 31, 2024 and December 31, 2023, the Company had additional available credit with the FHLB of approximately $8.0 billion and $6.1 billion respectively. The weighted average rate on FHLB advances was 5.66% and 5.67% as of March 31, 2024 and December 31, 2023, respectively. Repurchase Agreements Warehouse borrowing lines of credit are used to finance the acquisition of loans through the use of repurchase agreements. Repurchase agreements operate as financings under which the Company transfers loans to secure these borrowings. The borrowing amounts are based on the attributes of the collateralized loans and are defined in the repurchase agreement of each warehouse lender. The Company retains beneficial ownership of the transferred loans and will receive the loans from the lender upon full repayment of the borrowing. The repurchase agreements may require the Company to transfer additional assets to the lender in the event the estimated fair value of the existing transferred loans declines. As of March 31, 2024, the Company had access to approximately $2.3 billion in uncommitted warehouse funding, of which no amounts were drawn. As of December 31, 2023, there were $376 million in warehouse borrowings outstanding at a weighted average borrowing rate of 6.72%. Other repurchase facilities include EBO loan and customer repurchase agreements. The total carrying value of these repurchase agreements was $8 million and $6 million as of March 31, 2024 and December 31, 2023, respectively. Secured Borrowings Secured borrowings consist of transfers of loans HFS not qualifying for sales accounting treatment. The weighted average interest rate on secured borrowings was 6.58% and 6.10% as of March 31, 2024 and December 31, 2023, respectively. Long-Term Borrowings Credit Linked Notes The Company entered into credit linked note transactions that effectively transfer the risk of first losses on reference pools of the Company's loans purchased under its residential mortgage purchase program to the purchasers of the notes. The principal and interest payable on these notes may be reduced by a portion of the Company's loss on such loans if one of the following occurs with respect to a covered loan: (i) realized losses incurred by the Company on a loan following a liquidation of the loan or certain other events, or (ii) a modification of the loan resulting in a reduction in payments. The aggregate losses, if any, for each payment date will be allocated to reduce the class principal amount and (for modifications) the current interest of the notes in reverse order of class priority. Losses on residential mortgages have not generally been significant. The Company's outstanding credit linked note issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 89 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 177 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 189 2 Total $ 455 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 90 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 179 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 191 3 Total $ 460 $ 8 (1) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 11.00% (or, a weighted average spread of 7.80%) on a reference pool balance of $1.8 billion as of March 31, 2024 and December 31, 2023. (2) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 15.00% (or, a weighted average spread of 6.00%) on a reference pool balance of $3.5 billion and $3.6 billion as of March 31, 2024 and December 31, 2023, respectively. (3) There are six classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 3.15% to 8.50% (or, a weighted average spread of 4.67%) on a reference pool balance of $3.7 billion and $3.8 billion as of March 31, 2024 and December 31, 2023, respectively.

Qualifying Debt

Qualifying Debt	3 Months Ended
Qualifying Debt	Mar. 31, 2024
Debt Disclosure [Abstract]
Qualifying Debt	8. QUALIFYING DEBT Subordinated Debt The Company's subordinated debt issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 (1) Notes are redeemable, in whole or in part, beginning on June 15, 2026 at their principal amount plus accrued and unpaid interest and has a fixed interest rate of 3.00%. The notes also convert to a variable rate of three-month SOFR plus 225 basis points on this date. (2) Debt is redeemable, in whole or in part, on or after June 1, 2025 at its principal amount plus accrued and unpaid interest and has a fixed interest rate of 5.25% through June 1, 2025 and then converts to a variable rate per annum equal to three-month SOFR plus 512 basis points. The carrying value of all subordinated debt issuances totaled $818 million at March 31, 2024 and December 31, 2023. Junior Subordinated Debt The Company has formed or acquired through acquisition eight statutory business trusts, which exist for the exclusive purpose of issuing Cumulative Trust Preferred Securities. With the exception of debt issued by Bridge Capital Trust I and Bridge Capital Trust II, junior subordinated debt is recorded at fair value at each reporting date due to the FVO election made by the Company under ASC 825. The Company did not make the FVO election for the junior subordinated debt acquired in the Bridge acquisition. Accordingly, the carrying value of these trusts does not reflect the current fair value of the debt and includes a fair market value adjustment established at acquisition that is being accreted over the remaining life of the trusts. The carrying value of junior subordinated debt was $78 million and $77 million as of March 31, 2024 and December 31, 2023, respectively, with maturity dates ranging from 2033 through 2037. The weighted average interest rate of all junior subordinated debt as of March 31, 2024 and December 31, 2023 was 7.90% and 7.93%, respectively. In the event of certain changes or amendments to regulatory requirements or federal tax rules, the debt is redeemable in whole. The obligations under these instruments are fully and unconditionally guaranteed by the Company and rank subordinate and junior in right of payment to all other liabilities of the Company. Based on guidance issued by the FRB, the Company's securities continue to qualify as Tier 1 Capital.

Stockholders' Equity

Stockholders' Equity	3 Months Ended
Stockholders' Equity	Mar. 31, 2024
Stockholders' Equity Note [Abstract]
Stockholders' Equity	9. STOCKHOLDERS' EQUITY Stock-Based Compensation Restricted Stock Awards Restricted stock awards granted to employees generally vest over a 3-year period and stock grants made to non-employee WAL directors have generally vested over six months, with the 2024 grants vesting over 1 year. The Company estimates the compensation cost for stock grants based upon the grant date fair value. Stock compensation expense is recognized on a straight-line basis over the requisite service period for the entire award. The aggregate grant date fair value for the restricted stock awards granted during the three months ended March 31, 2024 and 2023 was $44.8 million and $44.5 million, respectively. Stock compensation expense related to restricted stock awards granted to employees is included in Salaries and employee benefits in the Consolidated Income Statement. For restricted stock awards granted to WAL directors, the related stock compensation expense is included in Legal, professional, and directors' fees. For the three months ended March 31, 2024, the Company recognized $12.1 million, in stock-based compensation expense related to employee and WAL director stock grants, compared to $8.5 million for the three months ended March 31, 2023. Performance Stock Units The Company grants performance stock units to members of its executive management that do not vest unless the Company achieves a specified cumulative EPS target and a TSR performance measure over a three-year performance period. The number of shares issued will vary based on the cumulative EPS target and relative TSR performance factor that is achieved. The Company estimates the cost of performance stock units based upon the grant date fair value and expected vesting percentage over the three-year performance period. During the three months ended March 31, 2024, the Company recognized stock-based compensation expense of $1.0 million, compared to a $2.5 million net reversal for such units during the three months ended March 31, 2023 due to revised performance expectations. The three-year performance period for the 2021 grant ended on December 31, 2023, and based on the Company's cumulative EPS and TSR performance measure for the performance period, these shares vested at 168% of the target award under the terms of the grant. As a result, 129,942 shares became fully vested and were distributed to executive management in the first quarter of 2024. The three-year performance period for the 2020 grant ended on December 31, 2022, and based on the Company's cumulative EPS and TSR performance measure for the performance period, these shares vested at 180% of the target award under the terms of the grant. As a result, 157,784 shares became fully vested and distributed to executive management in the first quarter of 2023. Cash Settled Restricted Stock Units In 2024, the Company began granting cash settled restricted stock units to members of its executive management that vest equally on a monthly basis over a three-year period. As the awards are settled in cash and are not dependent on the occurrence of a future event, these awards are classified as liabilities on the Consolidated Balance Sheet. At each vesting date, the Company settles the vested stock units in cash at the settlement date stock price. During the three months ended March 31, 2024, the Company recognized compensation expense of $0.1 million related to these awards. There were no such awards outstanding during the three months ended March 31, 2023. Preferred Stock The Company has 12,000,000 depositary shares outstanding, each representing a 1/400th ownership interest in a share of the Company’s 4.250% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Shares, Series A, par value $0.0001 per share, with a liquidation preference of $25 per depositary share (equivalent to $10,000 per share of Series A preferred stock). During the three months ended March 31, 2024 and 2023, the Company declared and paid a quarterly cash dividend of $0.27 per depositary share, for a total dividend payment to preferred stockholders of $3.2 million. Common Stock Issuances Pursuant to ATM Distribution Agreement During the three months ended March 31, 2024 and 2023, the Company had no sales under the ATM program. Sales under the ATM program are made pursuant to a prospectus dated May 14, 2021 and prospectus supplements filed with the SEC in an offering of shares from the Company's shelf registration statement on Form S-3 (No. 333-256120). As of March 31, 2024, the remaining number of shares that can be sold under this agreement totaled 1,107,769. Cash Dividend on Common Shares During the three months ended March 31, 2024, the Company declared and paid a quarterly cash dividend of $0.37 per share, for a total dividend payment to stockholders of $40.7 million. During the three months ended March 31, 2023, the Company declared and paid a quarterly cash dividend of $0.36 per share for a total dividend payment to stockholders of $39.4 million. Treasury Shares

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
Accumulated Other Comprehensive Income (Loss)	Mar. 31, 2024
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	10. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following table summarizes the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods indicated: Three Months Ended March 31, Unrealized holding gains (losses) on AFS securities Unrealized holding losses on SERP Unrealized holding gains (losses) on junior subordinated debt Impairment loss on securities Total (in millions) Balance, December 31, 2023 $ (516.6) $ (0.3) $ 2.8 $ 1.2 $ (512.9) Other comprehensive loss before reclassifications (44.9) — (0.5) — (45.4) Amounts reclassified from AOCI 0.7 — — — 0.7 Net current-period other comprehensive loss (44.2) — (0.5) — (44.7) Balance, March 31, 2024 $ (560.8) $ (0.3) $ 2.3 $ 1.2 $ (557.6) Balance, December 31, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive income (loss) before reclassifications 60.1 — (1.1) — 59.0 Amounts reclassified from AOCI 9.3 — — 1.2 10.5 Net current-period other comprehensive income (loss) 69.4 — (1.1) 1.2 69.5 Balance, March 31, 2023 $ (594.3) $ (0.3) $ 1.9 $ 1.2 $ (591.5)

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
Derivatives and Hedging Activities	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	11. DERIVATIVES AND HEDGING ACTIVITIES The Company is a party to various derivative instruments. The primary types of derivatives the Company uses are interest rate contracts, forward purchase and sale commitments, and interest rate futures. Generally, these instruments are used to help manage the Company's exposure to interest rate risk related to IRLCs and its inventory of loans HFS and MSRs and also to meet client financing and hedging needs. Derivatives are recorded at fair value on the Consolidated Balance Sheet, after taking into account the effects of bilateral collateral and master netting agreements. These agreements allow the Company to settle all derivative contracts held with the same counterparty on a net basis, and to offset net derivative positions with related cash collateral, where applicable. Derivatives Designated in Hedge Relationships The Company utilizes derivatives that have been designated as part of a hedge relationship in accordance with the applicable accounting guidance to minimize the exposure to changes in benchmark interest rates, which reduces asset sensitivity and volatility of net interest income and EVE to interest rate fluctuations, such that interest rate risk falls within Board approved limits. The primary derivative instruments used to manage interest rate risk are interest rate swaps, which convert the contractual interest rate index of agreed-upon amounts of assets and liabilities (i.e., notional amounts) from either a fixed rate to a variable rate, or from a variable rate to a fixed rate. The Company has pay fixed/receive variable interest rate swaps designated as fair value hedges of certain fixed rate loans. As a result, the Company receives variable-rate interest payments in exchange for making fixed-rate payments over the lives of the contracts without exchanging the notional amounts. The variable-rate interest payments were based on LIBOR and were converted to SOFR plus a spread adjustment upon the discontinuation of LIBOR in June 2023. The Company also has pay fixed/receive variable interest rate swaps, designated as fair value hedges using the portfolio layer method to manage the exposure to changes in fair value associated with pools of fixed rate loans, resulting from changes in the designated benchmark interest rate (federal funds rate). These portfolio layer hedges provide the Company the ability to execute a fair value hedge of the interest rate risk associated with a portfolio of similar prepayable assets, whereby the last dollar amount estimated to remain in the portfolio of assets was identified as the hedged item. Under these interest rate swap contracts, the Company received a variable rate and paid a fixed rate on the outstanding notional amount. The Company also had pay fixed/receive variable interest rate swaps, designated as fair value hedges using the last-of-layer method. Upon termination of these last-of-layer hedges in 2022, the cumulative basis adjustment on these hedges was allocated across the remaining loan pool and is being amortized over the remaining term. At March 31, 2024, the remaining cumulative basis adjustment on the terminated last-of-layer hedges totaled $6 million. Derivatives Not Designated in Hedge Relationships Management enters into certain contracts and agreements, including foreign exchange derivative contracts, back-to-back interest rate contracts, risk participation agreements and equity warrants, which are not designated as accounting hedges. Foreign exchange derivative contracts include spot, forward, forward window, and swap contracts. The purpose of these derivative contracts is to mitigate foreign currency risk on transactions entered into, or on behalf of customers. The Company's back-to-back interest rate contracts are used to allow customers to manage long-term interest rate risk. Contracts with customers, along with the related derivative trades the Company places, are both remeasured at fair value, and are referred to as economic hedges since they economically offset the Company's exposure. The Company also uses derivative financial instruments to manage exposure to interest rate risk within its mortgage banking business related to IRLCs and its inventory of loans HFS and MSRs. The Company economically hedges the changes in fair value associated with changes in interest rates generally by utilizing forward sale commitments, interest rate futures and interest rate swaps. Risk participation agreements are entered into with lead banks in certain loan syndications to share in the risk of default on interest rate swaps on participated loans. Equity warrants represent the right to buy shares in a company at a specified price and are acquired by the Company primarily in connection with negotiating credit facilities and certain other services to private, venture-backed companies in the technology industry. Fair Value Hedges As of March 31, 2024 and December 31, 2023, the following amounts are reflected on the Consolidated Balance Sheet related to cumulative basis adjustments for outstanding fair value hedges: March 31, 2024 December 31, 2023 Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 3,857 $ 66 $ 3,875 $ (6) (1) Included in the carrying value of the hedged assets/(liabilities). (2) As of March 31, 2024, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.6 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $(46) million. For the Company's derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current period earnings. The loss or gain on the hedged item is recognized in the same line item as the offsetting loss or gain on the related interest rate swaps. For loans, the gain or loss on the hedged item is included in interest income, as shown in the table below. Three Months Ended March 31, 2024 2023 Income Statement Classification Gain/(Loss) on Swaps Gain/(Loss) on Hedged Item Gain/(Loss) on Swaps Gain/(Loss) on Hedged Item (in millions) Interest income $ 72.0 $ (72.5) $ (4.3) $ 4.3 In addition to the gains and losses on the Company's outstanding fair value hedges presented in the above table, the Company recognized $3.0 million in interest income related to the amortization of the cumulative basis adjustment on its discontinued last-of-layer hedges during the three months ended March 31, 2024 and 2023. Fair Values, Volume of Activity, and Gain/Loss Information Related to Derivative Instruments The following table summarizes the fair value of the Company's derivative instruments on a gross basis as of March 31, 2024, December 31, 2023, and March 31, 2023. The change in the notional amounts of these derivatives from March 31, 2023 to March 31, 2024 indicates the volume of the Company's derivative transaction activity during these periods. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow the Company to settle all derivative contracts with the same counterparty on a net basis and to offset the net derivative position with the related cash collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, the Company does not adjust those derivative amounts with counterparties. March 31, 2024 December 31, 2023 March 31, 2023 Fair Value Fair Value Fair Value Notional Derivative Assets Derivative Liabilities Notional Derivative Assets Derivative Liabilities Notional Derivative Assets Derivative Liabilities (in millions) Derivatives designated as hedging instruments: Fair value hedges Interest rate contracts $ 3,884 $ 67 $ — $ 3,895 $ 19 $ 24 $ 470 $ 14 $ 1 Total $ 3,884 $ 67 $ — $ 3,895 $ 19 $ 24 $ 470 $ 14 $ 1 Derivatives not designated as hedging instruments: Foreign currency contracts $ 165 $ 1 $ 1 $ 135 $ 1 $ 1 $ 189 $ 2 $ 1 Forward purchase contracts 5,590 13 2 5,544 26 — 7,814 34 5 Forward sales contracts 8,380 4 28 7,626 1 55 9,702 3 64 Futures purchase contracts (1), (2) 124 — — 124 — — — — — Futures sales contracts (1), (2) 9,996 — — 10,906 — — 9,710 — — Interest rate lock commitments 1,810 10 1 1,822 18 — 1,557 14 1 Interest rate contracts 3,890 20 21 3,628 19 20 1,983 5 6 Risk participation agreements 75 — — 72 — — 51 — — Equity warrants 57 18 — 55 4 — 50 3 — Total $ 30,087 $ 66 $ 53 $ 29,912 $ 69 $ 76 $ 31,056 $ 61 $ 77 Margin 139 8 202 (9) 5 (14) Total, including margin $ 30,087 $ 205 $ 61 $ 29,912 $ 271 $ 67 $ 31,056 $ 66 $ 63 (1) The Company enters into futures purchase and sales contracts that are subject to daily remargining and almost all of which are based on three-month SOFR to hedge against its MSR valuation exposure. The notional amount on these contracts is substantial as these contracts have a short duration and are intended to cover the longer duration of MSR hedges. (2) The notional amounts previously reported for March 31, 2023 have been adjusted to account for the impact of offsetting contracts. To close a futures contract prior to settlement, the Company purchases an offsetting future with the same terms as the original contract and these contracts no longer require settlement. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in Other assets or Other liabilities on the Consolidated Balance Sheet, as summarized in the table below: March 31, 2024 December 31, 2023 March 31, 2023 Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) (in millions) Derivatives subject to master netting arrangements: Assets Foreign currency contracts $ 1 $ — $ 1 $ — $ — $ — $ — $ — $ — Forward purchase contracts 13 — 13 26 — 26 30 — 30 Forward sales contracts 4 — 4 1 — 1 3 — 3 Interest rate contracts 84 — 84 31 — 31 14 — 14 Margin 139 — 139 202 — 202 5 — 5 Netting — (33) (33) — (67) (67) — (38) (38) $ 241 $ (33) $ 208 $ 260 $ (67) $ 193 $ 52 $ (38) $ 14 Liabilities Foreign currency contracts $ (1) $ — $ (1) $ (1) $ — $ (1) $ — $ — $ — Forward purchase contracts (2) — (2) — — — (4) — (4) Forward sales contracts (27) — (27) (55) — (55) (52) — (52) Interest rate contracts (2) — (2) (31) — (31) (1) — (1) Margin (8) — (8) 9 — 9 14 — 14 Netting — 33 33 — 67 67 — 38 38 $ (40) $ 33 $ (7) $ (78) $ 67 $ (11) $ (43) $ 38 $ (5) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ — $ — $ — $ 1 $ — $ 1 $ 2 $ — $ 2 Forward purchase contracts — — — — — 4 — 4 Interest rate lock commitments 10 — 10 18 — 18 14 — 14 Interest rate contracts 3 — 3 7 — 7 5 — 5 Equity warrants 18 — 18 4 — 4 3 — 3 $ 31 $ — $ 31 $ 30 $ — $ 30 $ 28 $ — $ 28 Liabilities Foreign currency contracts $ — $ — $ — $ — $ — $ — $ (1) $ — $ (1) Forward purchase contracts — — — — — — (1) — (1) Forward sales contracts (1) — (1) — — — (12) — (12) Interest rate lock commitments (1) — (1) — — — (1) — (1) Interest rate contracts (19) — (19) (13) — (13) (6) — (6) $ (21) $ — $ (21) $ (13) $ — $ (13) $ (21) $ — $ (21) Total derivatives and margin Assets $ 272 $ (33) $ 239 $ 290 $ (67) $ 223 $ 80 $ (38) $ 42 Liabilities $ (61) $ 33 $ (28) $ (91) $ 67 $ (24) $ (64) $ 38 $ (26) The following table summarizes the net gain (loss) on derivatives included in income: Three Months Ended March 31, 2024 2023 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ (8.1) $ 11.5 Forward contracts 16.7 (36.8) Interest rate swaps (2.2) 1.2 Other contracts 0.7 (0.5) Total gain (loss) $ 7.1 $ (24.6) Net loan servicing revenue: Forward contracts $ (16.3) $ (1.6) Futures contracts 10.7 (4.0) Interest rate swaps (36.3) 19.0 Total (loss) gain $ (41.9) $ 13.4 Counterparty Credit Risk

Earnings per Share

Earnings per Share	3 Months Ended
Earnings per Share	Mar. 31, 2024
Earnings Per Share [Abstract]
Earnings Per Share	12. EARNINGS PER SHARE Diluted EPS is calculated using the weighted average outstanding common shares during the period, including common stock equivalents. Basic EPS is calculated using the weighted average outstanding common shares during the period. The following table presents the calculation of basic and diluted EPS: Three Months Ended March 31, 2024 2023 (in millions, except per share amounts) Weighted average shares - basic 108.5 108.1 Dilutive effect of stock awards 0.5 0.2 Weighted average shares - diluted 109.0 108.3 Net income available to common stockholders $ 174.2 $ 139.0 Earnings per Common Share: Basic $ 1.61 $ 1.29 Diluted 1.60 1.28

Income Taxes

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	13. INCOME TAXES The Company's effective tax rate was 23.5% and 23.0% for the three months ended March 31, 2024 and 2023, res pectively. The increase in the effective tax rate was primarily due to an increase in nondeductible insurance premiums and shortfalls from stock compensation expense in 2024. As of March 31, 2024, the net DTA balance totaled $300 million, a n increase of $13 million from $287 million at December 31, 2023. This overall increase in the net DTA was primarily the result of a decrease in the fair market value of AFS securities. Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $300 million at March 31, 2024 is more-likely-than-not based on expectations as to future taxable income and based on available tax planning strategies that could be implemented if necessary to prevent a carryover from expiring. At March 31, 2024 and December 31, 2023, the Compan y had no deferred tax valuation allowance. LIHTC and renewable energy projects The Company holds ownership interests in limited partnerships and limited liability companies that invest in affordable housing and renewable energy projects. These investments are designed to generate a return primarily through the realization of federal tax credits and deductions. Investments in LIHTC and renewable energy totaled $553 million and $573 million as of March 31, 2024 and December 31, 2023, respectively. Unfunded LIHTC and renewable energy obligations are included in Other liabilities on the Consolidated Balance Sheet and totaled $308 million and $322 million as of March 31, 2024 and December 31, 2023, respectively. For the three months ended March 31, 2024 and 2023, $18.6 million and $11.3 million, respectively, of amortization related to LIHTC investments was recognized as a component of income tax expense.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. COMMITMENTS AND CONTINGENCIES Unfunded Commitments and Letters of Credit The Company is party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit and letters of credit. They involve, to varying degrees, elements of credit risk in excess of amounts recognized on the Consolidated Balance Sheet. Lines of credit are obligations to lend money to a borrower. Credit risk arises when the borrower's current financial condition may indicate less ability to pay than when the commitment was originally made. In the case of letters of credit, the risk arises from the potential failure of the customer to perform according to the terms of a contract. In such a situation, the third party might draw on the letter of credit to pay for completion of the contract and the Company would look to its customer to repay these funds with interest. To minimize the risk, the Company uses the same credit policies in making commitments and conditional obligations as it would for a loan to that customer. Letters of credit and financial guarantees are commitments issued by the Company to guarantee the performance of a customer to a third party in borrowing arrangements. The Company generally has recourse to recover from the customer any amounts paid under the guarantees. Typically, letters of credit issued have expiration dates within one year. A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: March 31, 2024 December 31, 2023 (in millions) Commitments to extend credit, including unsecured loan commitments of $937 at March 31, 2024 and $989 at December 31, 2023 $ 13,106 $ 13,291 Credit card commitments and financial guarantees 427 418 Letters of credit, including unsecured letters of credit of $6 at March 31, 2024 and $4 at December 31, 2023 238 222 Total $ 13,771 $ 13,931 Commitments to extend credit are agreements to lend to a customer provided that there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The Company enters into credit arrangements that generally provide for the termination of advances in the event of a covenant violation or other event of default. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management’s credit evaluation of the party. The commitments are collateralized by the same types of assets used as loan collateral. The Company has exposure to credit losses from unfunded commitments and letters of credit. As funds have not been disbursed on these commitments, they are not reported as loans outstanding. Credit losses related to these commitments are included in Other liabilities as a separate loss contingency and are not included in the ACL reported in "Note 4. Loans, Leases and Allowance for Credit Losses" of these Notes to Unaudited Consolidated Financial Statements. This loss contingency for unfunded loan commitments and letters of credit was $33 million and $32 million as of March 31, 2024 and December 31, 2023, respectively. Changes to this liability are adjusted through the provision for credit losses in the Consolidated Income Statement. Commitments to Invest in Renewable Energy Projects The Company has off-balance sheet commitments to invest in renewable energy projects, as described in "Note 13. Income Taxes" of these Notes to Unaudited Consolidated Financial Statements, subject to the underlying project meeting certain milestones. These conditional commitments totaled $38 million and $32 million as of March 31, 2024 and December 31, 2023, respectively. Concentrations of Lending Activities The Company does not have a single external customer from which it derives 10% or more of its revenues. The Company monitors concentrations of lending activities at the product and borrower relationship level. Commercial and industrial loans made up 39% and 38% of the Company's HFI loan portfolio as of March 31, 2024 and December 31, 2023, respectively. The Company's loan portfolio includes significant credit exposure to the CRE market. As of March 31, 2024 and December 31, 2023, CRE related loans accounted for approximately 32% and 33% of total loans, respectively. Approximately 16% of CRE loans, excluding construction and land loans, were owner-occupied as of March 31, 2024 and December 31, 2023. No borrower relationships at both the commitment and funded loan level exceeded 5% of total loans HFI as of March 31, 2024 and December 31, 2023. Contingencies The Company is involved in various lawsuits of a routine nature that are being handled and defended in the ordinary course of the Company’s business. Expenses are being incurred in connection with these lawsuits, but in the opinion of management, based in part on consultation with outside legal counsel, the resolution of these lawsuits and associated defense costs will not have a material impact on the Company’s financial position, results of operations, or cash flows. Lease Commitments

Fair Value Accounting

Fair Value Accounting	3 Months Ended
Fair Value Accounting	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Fair Value Accounting	15. FAIR VALUE ACCOUNTING The fair value of an asset or liability is the price that would be received to sell the asset or paid to transfer the liability in an orderly transaction occurring in the principal market (or most advantageous market in the absence of a principal market) for such asset or liability. In estimating fair value, the Company utilizes valuation techniques that are consistent with the market approach, the income approach, and/or the cost approach. Such valuation techniques are consistently applied. Inputs to valuation techniques include the assumptions market participants would use in pricing an asset or liability. ASC 825 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). In general, fair value is based upon quoted market prices, where available. If such quoted market prices are not available, fair value is based upon internally-developed models that primarily use, as inputs, observable market-based parameters. Valuation adjustments may be made to ensure financial instruments are recorded at fair value. These adjustments may include amounts to reflect counterparty credit quality and the Company’s creditworthiness, among other things, as well as unobservable parameters. Any such valuation adjustments are applied consistently over time. The Company’s valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While management believes the Company’s valuation methodologies are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. A more detailed description of the valuation methodologies used for assets and liabilities measured at fair value is set forth below. Under ASC 825, the Company elected the FVO treatment for junior subordinated debt issued by WAL. This election is irrevocable and results in the recognition of unrealized gains and losses on the debt at each reporting date. These unrealized gains and losses are recognized in OCI rather than earnings. The Company did not elect FVO treatment for the junior subordinated debt assumed in the Bridge Capital Holdings acquisition. The following table presents unrealized gains and losses from fair value changes on junior subordinated debt: Three Months Ended March 31, 2024 2023 (in millions) Unrealized losses $ (0.7) $ (1.5) Changes included in OCI, net of tax (0.5) (1.1) Fair value on a recurring basis Financial assets and financial liabilities measured at fair value on a recurring basis include the following: AFS debt securities: Securities classified as AFS are reported at fair value utilizing Level 1 and Level 2 inputs. For these securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include quoted prices in active markets, dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information, and the bond’s terms and conditions, among other things. Equity securities: Preferred stock and CRA investments are reported at fair value utilizing Level 1 inputs. Independent pricing service: The Company's independent pricing service provides pricing information on the majority of the Company's Level 1 and Level 2 AFS debt securities. For a small subset of securities, other pricing sources are used, including observed prices on publicly-traded securities and dealer quotes. Management independently evaluates the fair value measurements received from the Company's third-party pricing service through multiple review steps. First, management reviews what has transpired in the marketplace with respect to interest rates, credit spreads, volatility, and mortgage rates, among other things, and develops an expectation of changes to the securities' valuations from the previous quarter. Then, management selects a sample of investment securities and compares the values provided by its primary third-party pricing service to the market values obtained from secondary sources, including other pricing services and safekeeping statements, and evaluates those with notable variances. In instances where there are discrepancies in pricing from various sources and management expectations, management may manually price securities using currently observed market data to determine whether they can develop similar prices or may utilize bid information from broker dealers. Any remaining discrepancies between management’s review and the prices provided by the vendor are discussed with the vendor and/or the Company’s other valuation advisors. Loans HFS : Government-insured or guaranteed and agency-conforming 1-4 family residential loans HFS are salable into active markets. Accordingly, the fair value of these loans is based primarily on quoted market or contracted selling prices or a market price equivalent, which are categorized as Level 2 in the fair value hierarchy. Mortgage servicing rights : MSRs are measured based on valuation techniques using Level 3 inputs. The Company uses a discounted cash flow model that incorporates assumptions market participants would use in estimating the fair value of servicing rights, including, but not limited to, option adjusted spread, conditional prepayment rate, servicing fee rate, recapture rate, and cost to service. Derivative financial instruments : Forward purchase and sales contracts are measured based on valuation techniques using Level 2 inputs, such as quoted market prices, contracted selling prices, or a market price equivalent. Interest rate and foreign currency contracts are reported at fair value utilizing Level 2 inputs. The Company obtains dealer quotations to value its interest rate contracts. IRLCs are measured based on valuation techniques that consider loan type, underlying loan amount, maturity date, note rate, loan program, and expected settlement date, with Level 3 inputs for the servicing release premium and pull-through rate. These measurements are adjusted at the loan level to consider the servicing release premium and loan pricing adjustment specific to each loan. The base value is then adjusted for estimated pull-through rates. The pull-through rate and servicing fee multiple are unobservable inputs based on historical experience. Equity warrants are measured using a Black-Scholes option pricing model based on contractual strike price, expected term, the risk-free interest rate, and volatility, adjusted for a lack of marketability. The volatility input is considered Level 3 as the underlying equity is not publicly traded and is determined using comparable publicly traded companies. Junior subordinated debt: The Company estimates the fair value of its junior subordinated debt using a discounted cash flow model which incorporates the effect of the Company’s own credit risk in the fair value of the liabilities (Level 3). The Company’s cash flow assumptions are based on contractual cash flows as the Company anticipates it will pay the debt according to its contractual terms. The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs: Fair Value Measurements at the End of the Reporting Period Using: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value March 31, 2024 (in millions) Assets: Available-for-sale debt securities U.S. Treasury securities $ 7,011 $ — $ — $ 7,011 Residential MBS issued by GSEs — 4,536 — 4,536 Private label residential MBS — 1,091 — 1,091 Tax-exempt — 849 — 849 Commercial MBS issued by GSEs — 586 — 586 Corporate debt securities — 367 — 367 Other 28 41 — 69 Total AFS debt securities $ 7,039 $ 7,470 $ — $ 14,509 Equity securities Preferred stock $ 105 $ — $ — $ 105 CRA investments 25 — — 25 Total equity securities $ 130 $ — $ — $ 130 Loans HFS (2) $ — $ 1,809 $ 3 $ 1,812 MSRs — — 1,178 1,178 Derivative assets (1) — 105 28 133 Liabilities: Junior subordinated debt (3) $ — $ — $ 64 $ 64 Derivative liabilities (1) — 52 1 53 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $66 million as of March 31, 2024 for the effective portion of the hedge, which relates to the fair value of the hedges put in place to mitigate against fluctuations in interest rates. Derivative assets and liabilities exclude margin of $139 million and $8 million, respectively. (2) Includes only the portion of loans HFS that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. (3) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. Fair Value Measurements at the End of the Reporting Period Using: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value December 31, 2023 (in millions) Assets: Available-for-sale debt securities U.S. Treasury securities $ 4,853 $ — $ — $ 4,853 Residential MBS issued by GSEs — 1,972 — 1,972 CLO — 1,399 — 1,399 Private label residential MBS — 1,117 — 1,117 Tax-exempt — 858 — 858 Commercial MBS issued by GSEs — 530 — 530 Corporate debt securities — 367 — 367 Other 28 41 — 69 Total AFS debt securities $ 4,881 $ 6,284 $ — $ 11,165 Equity securities Preferred stock $ 100 $ — $ — $ 100 CRA investments 26 — — 26 Total equity securities $ 126 $ — $ — $ 126 Loans - HFS (2) $ — $ 1,377 $ 3 $ 1,380 Mortgage servicing rights — — 1,124 1,124 Derivative assets (1) — 66 22 88 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 100 — 100 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $6 million as of December 31, 2023 for the effective portion of the hedge, which relates to the fair value of the hedges put in place to mitigate against fluctuations in interest rates. Derivative assets and liabilities exclude margin of $202 million and $(9) million, respectively. (2) Includes only the portion of loans HFS that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. (3) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. The change in Level 3 liabilities measured at fair value on a recurring basis included in OCI was as follows: Junior Subordinated Debt Three Months Ended March 31, 2024 2023 (in millions) Beginning balance $ (62.8) $ (62.5) Change in fair value (1) (0.7) (1.5) Ending balance $ (63.5) $ (64.0) (1) Unrealized losses attributable to changes in the fair value of junior subordinated debt are recorded in OCI, net of tax, and totaled $(0.5) million and $(1.1) million for three months ended March 31, 2024 and 2023, respectively. The significant unobservable inputs used in the fair value measurements of these Level 3 liabilities were as follows: March 31, 2024 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 64 Discounted cash flow Implied credit rating of the Company 8.73 % December 31, 2023 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 63 Discounted cash flow Implied credit rating of the Company 8.92 % The significant unobservable inputs used in the fair value measurement of the Company’s junior subordinated debt as of March 31, 2024 and December 31, 2023 was the implied credit risk for the Company. As of March 31, 2024 and December 31, 2023, the implied credit risk spread was calculated as the difference between the average of the 10 and 15-year 'BB' rated financial indexes over the corresponding swap indexes. As of March 31, 2024, the Company estimates the discount rate at 8.73%, which represents an implied credit spread of 3.43% plus three-month SOFR (5.30%). As of December 31, 2023, the Company estimated the discount rate at 8.92%, which was a 3.59% credit spread plus three-month SOFR (5.33%). The change in Level 3 assets and liabilities measured at fair value on a recurring basis included in income was as follows: Three Months Ended March 31, 2024 MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,124 $ 18 Purchases and additions 189 4,060 Sales and payments (156) — Settlement of IRLCs upon acquisition or origination of loans HFS — (4,067) Change in fair value 60 (1) Realization of cash flows (39) — Balance, end of period $ 1,178 $ 10 Changes in unrealized gains for the period (2) $ 46 $ 10 Three Months Ended March 31, 2023 MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,148 $ 2 Purchases and additions 142 2,946 Sales and payments (350) — Settlement of IRLCs upon acquisition or origination of loans HFS — (2,935) Change in fair value (8) 1 Mark to market adjustments 3 — Realization of cash flows (25) — Balance, end of period $ 910 $ 14 Changes in unrealized gains for the period (2) $ (3) $ 14 (1) IRLC asset and liability positions are presented net. (2) Amounts recognized as part of non-interest income. The significant unobservable inputs used in the fair value measurements of these Level 3 assets and liabilities were as follows: March 31, 2024 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) (43) - 297 213 Conditional prepayment rate (1) 9.1% - 22.0% 16.1 % Recapture rate 20.0% - 20.0% 20 % Servicing fee rate (in basis points) 25.0 - 56.5 38.4 Cost to service $75 - $95 $ 86 IRLCs: Servicing fee multiple 3.5 - 5.7 4.6 Pull-through rate 68% - 100% 86 % December 31, 2023 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) 29 - 253 213 Conditional prepayment rate (1) 9.5% - 23.9% 17.4 % Recapture rate 20.0% - 20.0% 20.0 % Servicing fee rate (in basis points) 25.0 - 56.5 35.6 Cost to service $93 - $100 $ 95 IRLCs: Servicing fee multiple 3.2 - 5.4 4.3 Pull-through rate 68% - 100% 89 % (1) Lifetime total prepayment speed annualized. The following is a summary of the difference between the aggregate fair value and the aggregate UPB of loans HFS for which the FVO has been elected: March 31, 2024 December 31, 2023 Fair value UPB Difference Fair value UPB Difference (in millions) Loans HFS: Current through 89 days delinquent $ 1,812 $ 1,755 $ 57 $ 1,379 $ 1,319 $ 60 90 days or more delinquent — — — 1 2 (1) Total $ 1,812 $ 1,755 $ 57 $ 1,380 $ 1,321 $ 59 Fair value on a nonrecurring basis Certain assets are measured at fair value on a nonrecurring basis. That is, the assets are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of credit deterioration). The following table presents such assets carried on the Consolidated Balance Sheet by caption and by level within the ASC 825 hierarchy: Fair Value Measurements at the End of the Reporting Period Using Total Quoted Prices in Active Markets for Identical Assets Active Markets for Similar Assets Unobservable Inputs (in millions) As of March 31, 2024: Loans HFI $ 441 $ — $ — $ 441 Other assets acquired through foreclosure 8 — — 8 As of December 31, 2023: Loans HFI $ 379 $ — $ — $ 379 Other assets acquired through foreclosure 8 — — 8 For Level 3 assets measured at fair value on a nonrecurring basis as of period end, the significant unobservable inputs used in the fair value measurements were as follows: March 31, 2024 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 441 Collateral method Third party appraisal Costs to sell 6.0% to 10.0% Discounted cash flow method Discount rate Contractual loan rate 3.0% to 8.0% Scheduled cash collections Probability of default 0% to 20.0% Proceeds from non-real estate collateral Loss given default 0% to 70.0% Other assets acquired through foreclosure 8 Collateral method Third party appraisal Costs to sell 4.0% to 10.0% December 31, 2023 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 379 Collateral method Third party appraisal Costs to sell 6.0% to 10.0% Discounted cash flow method Discount rate Contractual loan rate 3.0% to 8.0% Scheduled cash collections Probability of default 0% to 20.0% Proceeds from non-real estate collateral Loss given default 0% to 70.0% Other assets acquired through foreclosure 8 Collateral method Third party appraisal Costs to sell 4.0% to 10.0% Loans HFI: Loans measured at fair value on a nonrecurring basis include collateral dependent loans. The specific reserves for these loans are based on collateral value, net of estimated disposition costs and other identified quantitative inputs. Collateral value is determined based on independent third-party appraisals or internally-developed discounted cash flow analyses. Appraisals may utilize a single valuation approach or a combination of approaches, including comparable sales and the income approach. Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. In addition, when adjustments are made to an appraised value to reflect various factors such as the age of the appraisal or known changes in the market or the collateral, such valuation inputs are considered unobservable and the fair value measurement is categorized as a Level 3 measurement. Internal discounted cash flow analyses are also utilized to estimate the fair value of these loans, which considers internally-developed, unobservable inputs such as discount rates, default rates, and loss severity. Total Level 3 collateral dependent loans had an estimated fair value of $441 million and $379 million at March 31, 2024 and December 31, 2023, respectively, net of a specific ACL of $3 million and $10 million at March 31, 2024 and December 31, 2023, respectively. Other assets acquired through foreclosure: Other assets acquired through foreclosure consist of properties acquired as a result of, or in-lieu-of, foreclosure. These assets are initially reported at the fair value determined by independent appraisals using appraised value less estimated cost to sell. Such properties are generally re-appraised every 12 months. Costs relating to the development or improvement of the assets are capitalized and costs relating to holding the assets are charged to expense. Fair value is determined, where possible, using market prices derived from an appraisal or evaluation, which are considered to be Level 2. However, certain assumptions and unobservable inputs are often used by the appraiser, therefore qualifying the assets as Level 3 in the fair value hierarchy. When significant adjustments are based on unobservable inputs, such as when a current appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, the resulting fair value measurement has been categorized as a Level 3 measurement. The Company had $8 million of such assets at March 31, 2024 and December 31, 2023. Fair Value of Financial Instruments The estimated fair value of the Company’s financial instruments is as follows: March 31, 2024 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,461 $ — $ 1,253 $ — $ 1,253 AFS 14,509 7,039 7,470 — 14,509 Equity 130 130 — — 130 Derivative assets (1) 133 — 105 28 133 Loans HFS 1,841 — 1,818 23 1,841 Loans HFI, net 50,360 — — 47,245 47,245 Mortgage servicing rights 1,178 — — 1,178 1,178 Accrued interest receivable 360 — 360 — 360 Financial liabilities: Deposits $ 62,228 $ — $ 62,263 $ — $ 62,263 Other borrowings 6,221 — 6,184 — 6,184 Qualifying debt 896 — 734 77 811 Derivative liabilities (1) 53 — 52 1 53 Accrued interest payable 168 — 168 — 168 (1) Derivative assets and liabilities exclude margin of $139 million and $8 million, respectively. December 31, 2023 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,429 $ — $ 1,251 $ — $ 1,251 AFS 11,165 4,881 6,284 — 11,165 Equity securities 126 126 — — 126 Derivative assets (1) 84 — 66 18 84 Loans HFS 1,402 — 1,379 23 1,402 Loans HFI, net 49,960 — — 46,877 46,877 Mortgage servicing rights 1,124 — — 1,124 1,124 Accrued interest receivable 370 — 370 — 370 Financial liabilities: Deposits $ 55,333 $ — $ 55,379 $ — $ 55,379 Other borrowings 7,230 — 7,192 — 7,192 Qualifying debt 895 — 734 76 810 Derivative liabilities (1) 100 — 100 — 100 Accrued interest payable 151 — 151 — 151 (1) Derivative assets and liabilities exclude margin of $202 million and $(9) million, respectively. Interest rate risk The Company assumes interest rate risk (the risk to the Company’s earnings and capital from changes in interest rate levels) as a result of its normal operations. As a result, the fair values of the Company’s financial instruments, as well as its future net interest income, will change when interest rate levels change and that change may be either favorable or unfavorable to the Company. Interest rate risk exposure is measured using interest rate sensitivity analysis to determine the Company's change in EVE and net interest income resulting from hypothetical changes in interest rates. If potential changes to EVE and net interest income resulting from hypothetical interest rate changes are not within the limits established by the BOD, the BOD may direct management to adjust the asset and liability mix to bring interest rate risk within BOD-approved limits. WAB has an ALCO charged with managing interest rate risk within the BOD-approved limits. Limits are structured to preclude an interest rate risk profile which does not conform to both management and BOD risk tolerances without BOD and ALCO approval. Interest rate risk is also evaluated at the Parent level, which is reported to the BOD and its Finance and Investment Committee. Fair value of commitments The estimated fair value of letters of credit outstanding at March 31, 2024 and December 31, 2023 approximates zero as there have been no significant changes in borrower creditworthiness. Loan commitments on which the committed interest rates are less than the current market rate are insignificant at March 31, 2024 and December 31, 2023.

Segments

Segments	3 Months Ended
Segments	Mar. 31, 2024
Segment Reporting [Abstract]
Segments	16. SEGMENTS The Company's reportable segments are aggregated with a focus on products and services offered and consist of three reportable segments: • Commercial: provides commercial banking and treasury management products and services to small and middle-market businesses, specialized banking services to sophisticated commercial institutions and investors within niche industries, as well as financial services to the real estate industry. • Consumer Related: offers both commercial banking services to enterprises in consumer-related sectors and consumer banking services, such as residential mortgage banking. • Corporate & Other: consists of the Company's investment portfolio, Corporate borrowings and other related items, income and expense items not allocated to other reportable segments, and inter-segment eliminations. The Company's segment reporting process begins with the assignment of all loan and deposit accounts directly to the segments where these products are originated and/or serviced. Equity capital is assigned to each segment based on the risk profile of their assets and liabilities. With the exception of goodwill, which is assigned a 100% weighting, equity capital allocations ranged from 0% to 20% during the period. Any excess or deficient equity not allocated to segments based on risk is assigned to the Corporate & Other segment. Net interest income, provision for credit losses, and non-interest expense amounts are recorded in their respective segments to the extent the amounts are directly attributable to those segments. Net interest income is recorded in each segment on a TEB with a corresponding increase in income tax expense, which is eliminated in the Corporate & Other segment. Further, net interest income of a reportable segment includes a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics. Using this funds transfer pricing methodology, liquidity is transferred between users and providers. A net user of funds has lending/investing in excess of deposits/borrowings and a net provider of funds has deposits/borrowings in excess of lending/investing. A segment that is a user of funds is charged for the use of funds, while a provider of funds is credited through funds transfer pricing, which is determined based on the average estimated life of the assets or liabilities in the portfolio. Residual funds transfer pricing mismatches are allocable to the Corporate & Other segment and presented in net interest income. The net income amount for each reportable segment is further derived by the use of expense allocations. Certain expenses not directly attributable to a specific segment are allocated across all segments based on key metrics, such as number of employees, number of transactions processed for loans and deposits, and average loan and deposit balances. These types of expenses include information technology, operations, human resources, finance, risk management, credit administration, legal, and marketing. Income taxes are applied to each segment based on estimated effective tax rates. Any difference in the corporate tax rate and the aggregate effective tax rates in the segments are adjusted in the Corporate & Other segment. The following is a summary of operating segment information for the periods indicated: Balance Sheet: Consolidated Company Commercial Consumer Related Corporate & Other At March 31, 2024: (in millions) Assets: Cash, cash equivalents, and investments $ 19,890 $ 12 $ — $ 19,878 Loans HFS 1,841 — 1,841 — Loans HFI, net of deferred fees and costs 50,700 29,642 21,058 — Less: allowance for credit losses (340) (287) (53) — Net loans HFI 50,360 29,355 21,005 — Other assets acquired through foreclosure, net 8 8 — — Goodwill and other intangible assets, net 666 291 375 — Other assets 4,224 414 1,961 1,849 Total assets $ 76,989 $ 30,080 $ 25,182 $ 21,727 Liabilities: Deposits $ 62,228 $ 25,146 $ 30,481 $ 6,601 Borrowings and qualifying debt 7,117 9 21 7,087 Other liabilities 1,472 139 421 912 Total liabilities 70,817 25,294 30,923 14,600 Allocated equity: 6,172 2,590 1,814 1,768 Total liabilities and stockholders' equity $ 76,989 $ 27,884 $ 32,737 $ 16,368 Excess funds provided (used) — (2,196) 7,555 (5,359) Income Statement: Three Months Ended March 31, 2024: (in millions) Net interest income $ 598.9 $ 288.8 $ 292.6 $ 17.5 Provision for (recovery of) credit losses 15.2 15.3 (0.4) 0.3 Net interest income after provision for credit losses 583.7 273.5 293.0 17.2 Non-interest income 129.9 26.1 95.7 8.1 Non-interest expense 481.8 156.0 295.9 29.9 Income before income taxes 231.8 143.6 92.8 (4.6) Income tax expense (benefit) 54.4 33.7 21.8 (1.1) Net income (loss) $ 177.4 $ 109.9 $ 71.0 $ (3.5) Balance Sheet: Consolidated Company Commercial Consumer Related Corporate At December 31, 2023: (in millions) Assets: Cash, cash equivalents, and investments $ 14,569 $ 13 $ 125 $ 14,431 Loans held for sale 1,402 — 1,402 — Loans, net of deferred fees and costs 50,297 29,136 21,161 — Less: allowance for credit losses (337) (284) (53) — Total loans 49,960 28,852 21,108 — Other assets acquired through foreclosure, net 8 8 — — Goodwill and other intangible assets, net 669 292 377 — Other assets 4,254 390 1,826 2,038 Total assets $ 70,862 $ 29,555 $ 24,838 $ 16,469 Liabilities: Deposits $ 55,333 $ 23,897 $ 24,925 $ 6,511 Borrowings and qualifying debt 8,125 7 402 7,716 Other liabilities 1,326 109 338 879 Total liabilities 64,784 24,013 25,665 15,106 Allocated equity: 6,078 2,555 1,790 1,733 Total liabilities and stockholders' equity $ 70,862 $ 26,568 $ 27,455 $ 16,839 Excess funds provided (used) — (2,987) 2,617 370 Income Statements: Three Months Ended March 31, 2023: (in millions) Net interest income $ 609.9 $ 389.4 $ 199.3 $ 21.2 Provision for (recovery of) credit losses 19.4 (2.7) 1.5 20.6 Net interest income after provision for credit losses 590.5 392.1 197.8 0.6 Non-interest income (58.0) (96.7) 51.0 (12.3) Non-interest expense 347.9 136.0 192.0 19.9 Income (loss) before income taxes 184.6 159.4 56.8 (31.6) Income tax expense (benefit) 42.4 38.5 12.8 (8.9) Net income (loss) $ 142.2 $ 120.9 $ 44.0 $ (22.7)

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
Revenue from Contracts with Customers	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	17. REVENUE FROM CONTRACTS WITH CUSTOMERS

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 177.4	$ 142.2

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2024
Accounting Policies [Abstract]
Nature of operations	Nature of operations WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of customized loan, deposit, and treasury management capabilities, including 24/7 funds transfer and other digital payment offerings through its wholly-owned banking subsidiary, WAB. WAB operates the following full-service banking divisions: ABA, BON, FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services, including mortgage banking services through AmeriHome, and digital payment services for the class action legal industry. In addition, the Company has the following non-bank subsidiaries: CSI, a captive insurance company formed and licensed under the laws of the State of Arizona and established as part of the Company's overall enterprise risk management strategy, and WATC, which provides corporate trust services and levered loan administration solutions.
Basis of presentation	Basis of presentation The accompanying Unaudited Consolidated Financial Statements as of March 31, 2024 and for the three months ended March 31, 2024 and 2023 have been prepared in accordance with GAAP for interim financial information and Article 10 of Regulation S-X and, therefore, do not include all of the information and footnotes required by GAAP for complete financial statements. Accordingly, these statements should be read in conjunction with the Company's audited Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. The accounts of the Company and its consolidated subsidiaries are included in the Consolidated Financial Statements.
Recent accounting pronouncements and Recently adopted accounting guidance	Recent accounting pronouncements Improvements to Income Tax Disclosures In December 2023, the FASB issued guidance within ASU 2023-09, Income Taxes (Topic 740) . The amendments in this update are intended to increase visibility into various income tax components that affect the reconciliation of the effective tax rate to the statutory rate, as well as the qualitative and quantitative aspects of those components. Public business entities will be required to disclose on an annual basis, specific categories in the rate reconciliation and provide additional information for reconciling items that meet or exceed a five percent threshold (computed by multiplying pretax income by the applicable statutory income tax rate) and include disclosure of state and local jurisdictions that make up the majority of the state and local income tax category in the rate reconciliation. Additional disclosure items include disaggregation of income taxes paid to and income tax expense from federal, state, and foreign jurisdictions as well as disaggregation of income taxes paid to individual jurisdictions in which income taxes paid are equal to or greater than five percent of total income taxes paid. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and interim periods within fiscal years beginning after December 15, 2025 and may be applied on a prospective or retrospective basis. The Company is currently evaluating the impact these amendments will have on its Consolidated Financial Statements. Accounting for and Disclosure of Crypto Assets In December 2023, the FASB issued guidance within ASU 2023-08, Intangibles — Goodwill and Other — Crypto Assets (Topic 350) . The amendments in this update require entities that hold certain crypto assets to measure such assets at fair value and recognize any changes in fair value in net income in each reporting period. Entities will also be required to present crypto assets measured at fair value separately from other intangible assets on the balance sheet and changes from the remeasurement of crypto assets separately from changes in the carrying amounts of other intangible assets in the income statement. Other disclosure items include the name, cost basis, fair value, and number of units for each significant crypto asset holding and the aggregate fair values and cost bases of crypto asset holdings that are not individually significant along with a rollforward of activity in the reporting period and disclosure of the method for determining the cost basis of the crypto assets. The amendments in this update are effective for fiscal years beginning after December 15, 2024, including interim periods within those fiscal years and are applied through a cumulative-effect adjustment to the opening balance of retained earnings (as of the beginning of the annual reporting period of adoption). As the Company does not currently hold any crypto assets meeting the criteria outlined in the update, the adoption of this guidance is not expected to have an impact on the Company's Consolidated Financial Statements. Improvements to Reportable Segment Disclosures In November 2023, the FASB issued guidance within ASU 2023-07, Segment Reporting (Topic 280). The amendments in this update are intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures related to significant segment expenses. The amendments do not change how an entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments and all existing segment disclosure requirements in ASC 280 and other Codification topics remain unchanged. The amendments in this update are incremental and require public entities that report segment information to disclose, on an annual and interim basis, significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss as well as other segment items. Annual disclosure of the title and position of the chief operating decision maker and how the reported measures of segment profit or loss are used to assess performance and allocation of resources is also required. The amendments in this update are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024 and are applied on a retrospective basis. The Company is currently evaluating the impact these amendments will have on its Consolidated Financial Statements. Recently adopted accounting guidance Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method In March 2023, the FASB issued guidance within ASU 2023-02, Investments — Equity Method and Joint Ventures (Topic 323). The amendments in this update permit entities to elect to account for tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. Previously this option was only permitted for LIHTC investments. Additionally, the amendments in this update require that all tax equity investments accounted for using the proportional amortization method apply the delayed equity contribution guidance in Subtopic 323-740 and disclosure of the nature of an entity's tax equity investments and their effect on an entity's financial position and results of operations. The Company adopted this accounting guidance prospectively on January 1, 2024. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.
Use of estimates	Use of estimates
Principles of consolidation	Principles of consolidation As of March 31, 2024, WAL has the following significant wholly-owned subsidiaries: WAB and eight unconsolidated subsidiaries used as business trusts in connection with the issuance of trust-preferred securities. WAB has the following significant wholly-owned subsidiaries: 1) WABT, which holds certain investment securities, municipal and nonprofit loans, and leases; 2) WA PWI, which holds interests in certain limited partnerships invested primarily in low income housing tax credits and small business investment corporations; 3) Helios Prime, which holds interests in certain limited partnerships invested in renewable energy projects; 4) BW Real Estate, Inc., which operates as a real estate investment trust and holds certain of WAB's real estate loans and related securities; and 5) Western Finance Company, which purchases and originates equipment finance leases and provides mortgage banking services through its wholly-owned subsidiary, AmeriHome. The Company does not have any other significant entities that should be consolidated. All significant intercompany balances and transactions have been eliminated in consolidation.
Reclassifications	Reclassifications

Investment Securities (Tables)

Investment Securities (Tables)	3 Months Ended
Investment Securities (Tables)	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Carrying Amounts and Fair Values of Investment Securities	The carrying amounts and fair values of investment securities are summarized as follows: March 31, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,278 $ — $ (169) $ 1,109 Private label residential MBS 183 — (39) 144 Total HTM securities $ 1,461 $ — $ (208) $ 1,253 Available-for-sale debt securities U.S. Treasury securities $ 7,019 $ — $ (8) $ 7,011 Residential MBS issued by GSEs 4,928 3 (395) 4,536 Private label residential MBS 1,301 1 (211) 1,091 Tax-exempt 927 — (78) 849 Commercial MBS issued by GSEs 591 5 (10) 586 Corporate debt securities 411 — (44) 367 Other 74 3 (8) 69 Total AFS debt securities $ 15,251 $ 12 $ (754) $ 14,509 December 31, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,243 $ 1 $ (140) $ 1,104 Private label residential MBS 186 — (39) 147 Total HTM securities $ 1,429 $ 1 $ (179) $ 1,251 Available-for-sale debt securities U.S. Treasury securities $ 4,853 $ 1 $ (1) $ 4,853 Residential MBS issued by GSEs 2,328 3 (359) 1,972 CLO 1,407 1 (9) 1,399 Private label residential MBS 1,320 1 (204) 1,117 Tax-exempt 925 — (67) 858 Commercial MBS issued by GSEs 531 8 (9) 530 Corporate debt securities 411 — (44) 367 Other 74 4 (9) 69 Total AFS debt securities $ 11,849 $ 18 $ (702) $ 11,165
Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position	The following tables summarize the Company's AFS debt securities in an unrealized loss position, aggregated by major security type and length of time in a continuous unrealized loss position: March 31, 2024 Less Than Twelve Months More Than Twelve Months Total Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (in millions) Available-for-sale debt securities U.S. Treasury securities $ 8 $ 6,338 $ — $ — $ 8 $ 6,338 Residential MBS issued by GSEs 5 1,125 390 1,570 395 2,695 Private label residential MBS — — 211 997 211 997 Tax-exempt 1 33 77 815 78 848 Commercial MBS issued by GSEs 1 137 9 52 10 189 Corporate debt securities (1) — — 44 360 44 360 Other — — 8 55 8 55 Total AFS securities $ 15 $ 7,633 $ 739 $ 3,849 $ 754 $ 11,482 (1) Includes securities with an ACL that have a fair value of $22 million and unrealized losses of $6 million. December 31, 2023 Less Than Twelve Months More Than Twelve Months Total Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value (in millions) Available-for-sale debt securities U.S. Treasury securities $ 1 $ 2,208 $ — $ — $ 1 $ 2,208 Residential MBS issued by GSEs 3 174 356 1,551 359 1,725 Private label residential MBS — — 204 1,020 204 1,020 CLO — — 9 845 9 845 Tax-exempt 3 67 64 773 67 840 Corporate debt securities (1) — — 44 359 44 359 Commercial MBS issued by GSEs — — 9 53 9 53 Other — — 9 54 9 54 Total AFS securities $ 7 $ 2,449 $ 695 $ 4,655 $ 702 $ 7,104 (1) Includes securities with an ACL that have a fair value of $54 million and unrealized losses of $8 million.
Rollforward by Major Security Type of the ACL on AFS Debt Securities	The following table presents a rollforward by major security type of the ACL on the Company's AFS debt securities: Three Months Ended March 31, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 1.4 $ (0.1) $ — $ — $ 1.3 Three Months Ended March 31, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ — $ 19.3 $ (17.1) $ — $ 2.2
Rollforward by Major Security Type of the ACL on HTM Debt Securities	The following table presents a rollforward by major security type of the ACL on the Company's HTM debt securities: Three Months Ended March 31, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 7.8 $ 0.4 $ — $ — $ 8.2 Three Months Ended March 31, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 1.3 $ — $ — $ 6.5
Investment Securities by Credit Rating Type	The following tables summarize the carrying amount of the Company’s investment ratings position, which are updated quarterly and used to monitor the credit quality of the Company's securities: March 31, 2024 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Tax-exempt $ — $ — $ — $ — $ — $ — $ 1,278 $ 1,278 Private label residential MBS — — — — — — 183 183 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,461 $ 1,461 Available-for-sale debt securities U.S. Treasury securities $ — $ 7,011 $ — $ — $ — $ — $ — $ 7,011 Residential MBS issued by GSEs — 4,536 — — — — — 4,536 Private label residential MBS 1,064 — 26 — — 1 — 1,091 Tax-exempt 9 15 356 380 — — 89 849 Commercial MBS issued by GSEs — 586 — — — — — 586 Corporate debt securities — — — 76 242 49 — 367 Other — — 9 11 29 3 17 69 Total AFS securities (1) $ 1,073 $ 12,148 $ 391 $ 467 $ 271 $ 53 $ 106 $ 14,509 Equity securities Preferred stock $ — $ — $ — $ — $ 55 $ 38 $ 12 $ 105 CRA investments — 25 — — — — — 25 Total equity securities (1) $ — $ 25 $ — $ — $ 55 $ 38 $ 12 $ 130 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies. December 31, 2023 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Tax-exempt $ — $ — $ — $ — $ — $ — $ 1,243 $ 1,243 Private label residential MBS — — — — — — 186 186 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,429 $ 1,429 Available-for-sale debt securities U.S. Treasury securities $ — $ 4,853 $ — $ — $ — $ — $ — $ 4,853 Residential MBS issued by GSEs — 1,972 — — — — — 1,972 CLO 79 — 1,265 55 — — — 1,399 Private label residential MBS 1,090 — 26 — — 1 — 1,117 Tax-exempt 9 16 361 386 — — 86 858 Commercial MBS issued by GSEs — 530 — — — — — 530 Corporate debt securities — — — 76 211 80 — 367 Other — — 9 11 28 4 17 69 Total AFS securities (1) $ 1,178 $ 7,371 $ 1,661 $ 528 $ 239 $ 85 $ 103 $ 11,165 Equity securities Preferred stock $ — $ — $ — $ — $ 54 $ 35 $ 11 $ 100 CRA investments — 26 — — — — — 26 Total equity securities (1) $ — $ 26 $ — $ — $ 54 $ 35 $ 11 $ 126 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.
Amortized Cost and Fair Value of Investment Securities by Contractual Maturities	The amortized cost and fair value of the Company's debt securities as of March 31, 2024, by contractual maturities are shown below. MBS are shown separately as individual MBS are comprised of pools of loans with varying maturities. Therefore, these securities are listed separately in the maturity summary. March 31, 2024 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 29 $ 29 After one year through five years 8 8 After five years through ten years 86 74 After ten years 1,155 998 Mortgage-backed securities 183 144 Total HTM securities $ 1,461 $ 1,253 Available-for-sale Due in one year or less $ 6,540 $ 6,535 After one year through five years 646 634 After five years through ten years 278 242 After ten years 967 885 Mortgage-backed securities 6,820 6,213 Total AFS securities $ 15,251 $ 14,509
Gains and Losses on Sales of Investment Securities	The following table presents gross gains and losses on sales of investment securities: Three Months Ended March 31, 2024 2023 (in millions) Available-for-sale securities Gross gains $ 0.9 $ 3.4 Gross losses (1.8) (15.9) Net losses on AFS securities $ (0.9) $ (12.5)

Loans Held For Sale (Tables)

Loans Held For Sale (Tables)	3 Months Ended
Loans Held For Sale (Tables)	Mar. 31, 2024
Receivables [Abstract]
Summary of Loans HFS by Type	The following is a summary of loans HFS by type: March 31, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 764 498 Total government-insured or guaranteed 764 500 Agency-conforming 1,067 899 Non-agency 10 3 Total loans HFS $ 1,841 $ 1,402 (1) EBO loans are delinquent FHA, VA, or USDA loans purchased from GNMA pools under the terms of the GNMA MBS program that can be repooled when loans are brought current either through the borrower's reperformance or through completion of a loan modification. The following is a summary of the net gain on loan purchase, origination, and sale activities on residential mortgage loans to be sold or securitized: Three Months Ended March 31, 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 188.7 $ 142.4 Net proceeds from sale of loans (1) (160.7) (107.4) Provision for and change in estimate of liability for losses under representations and warranties, net 3.2 2.4 Change in fair value (6.7) 6.6 Change in fair value of derivatives: Unrealized gain (loss) on derivatives 15.3 (22.2) Realized gain on derivatives (8.1) (2.4) Total change in fair value of derivatives 7.2 (24.6) Net gain on residential mortgage loans HFS $ 31.7 $ 19.4 Loan acquisition and origination fees 13.6 12.0 Net gain on loan origination and sale activities $ 45.3 $ 31.4
Summary of Net Gain on Loan Purchase, Origination and Sale Activities on Residential Mortgage Loans	The following is a summary of loans HFS by type: March 31, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 764 498 Total government-insured or guaranteed 764 500 Agency-conforming 1,067 899 Non-agency 10 3 Total loans HFS $ 1,841 $ 1,402 (1) EBO loans are delinquent FHA, VA, or USDA loans purchased from GNMA pools under the terms of the GNMA MBS program that can be repooled when loans are brought current either through the borrower's reperformance or through completion of a loan modification. The following is a summary of the net gain on loan purchase, origination, and sale activities on residential mortgage loans to be sold or securitized: Three Months Ended March 31, 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 188.7 $ 142.4 Net proceeds from sale of loans (1) (160.7) (107.4) Provision for and change in estimate of liability for losses under representations and warranties, net 3.2 2.4 Change in fair value (6.7) 6.6 Change in fair value of derivatives: Unrealized gain (loss) on derivatives 15.3 (22.2) Realized gain on derivatives (8.1) (2.4) Total change in fair value of derivatives 7.2 (24.6) Net gain on residential mortgage loans HFS $ 31.7 $ 19.4 Loan acquisition and origination fees 13.6 12.0 Net gain on loan origination and sale activities $ 45.3 $ 31.4

Loans, Leases and Allowance f_2

Loans, Leases and Allowance for Credit Losses (Tables)	3 Months Ended
Loans, Leases and Allowance for Credit Losses (Tables)	Mar. 31, 2024
Receivables [Abstract]
Schedule of Held for Investment Loan Portfolio Composition of Loans, Leases and Allowance for Credit Losses	The composition of the Company's HFI loan portfolio is as follows: March 31, 2024 December 31, 2023 (in millions) Warehouse lending $ 6,915 $ 6,618 Municipal & nonprofit 1,622 1,554 Tech & innovation 2,941 2,808 Equity fund resources 695 845 Other commercial and industrial 7,754 7,452 CRE - owner occupied 1,707 1,658 Hotel franchise finance 3,556 3,855 Other CRE - non-owner occupied 6,365 5,974 Residential 13,078 13,287 Residential - EBO 1,171 1,223 Construction and land development 4,746 4,862 Other 150 161 Total loans HFI 50,700 50,297 Allowance for credit losses (340) (337) Total loans HFI, net of allowance $ 50,360 $ 49,960
Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days Still Accruing Interest by Loan Class	Loans are placed on nonaccrual status when management determines that the full repayment of principal and collection of interest according to contractual terms is no longer likely, generally when the loan becomes 90 days or more past due. The following tables present nonperforming loan balances by loan portfolio segment: March 31, 2024 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — Tech & innovation 34 28 62 — Other commercial and industrial 15 20 35 6 CRE - owner occupied 8 2 10 — Hotel franchise finance — 12 12 — Other CRE - non-owner occupied 174 1 175 — Residential — 79 79 — Residential - EBO — — — 349 Construction and land development 19 1 20 — Other 1 — 1 — Total $ 251 $ 148 $ 399 $ 355 December 31, 2023 Nonaccrual with No Allowance for Credit Loss Nonaccrual with an Allowance for Credit Loss Total Nonaccrual Loans Past Due 90 Days or More and Still Accruing (in millions) Municipal & nonprofit $ — $ 6 $ 6 $ — Tech & innovation 23 10 33 — Other commercial and industrial 19 34 53 — CRE - owner occupied 8 1 9 — Other CRE - non-owner occupied 82 1 83 — Residential — 70 70 — Residential - EBO — — — 399 Construction and land development 19 — 19 42 Total $ 151 $ 122 $ 273 $ 441
Aging of Loan Portfolio by Loan Portfolio Segment	The following table presents an aging analysis of past due loans by loan portfolio segment: March 31, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,915 $ — $ — $ — $ — $ 6,915 Municipal & nonprofit 1,622 — — — — 1,622 Tech & innovation 2,941 — — — — 2,941 Equity fund resources 695 — — — — 695 Other commercial and industrial 7,743 5 — 6 11 7,754 CRE - owner occupied 1,706 — 1 — 1 1,707 Hotel franchise finance 3,556 — — — — 3,556 Other CRE - non-owner occupied 6,339 26 — — 26 6,365 Residential 13,002 66 10 — 76 13,078 Residential - EBO 598 138 86 349 573 1,171 Construction and land development 4,741 5 — — 5 4,746 Other 147 3 — — 3 150 Total loans $ 50,005 $ 243 $ 97 $ 355 $ 695 $ 50,700 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 1,554 Tech & innovation 2,808 — — — — 2,808 Equity fund resources 845 — — — — 845 Other commercial and industrial 7,439 13 — — 13 7,452 CRE - owner occupied 1,627 — 31 — 31 1,658 Hotel franchise finance 3,824 15 16 — 31 3,855 Other CRE - non-owner occupied 5,974 — — — — 5,974 Residential 13,199 68 20 — 88 13,287 Residential - EBO 545 173 106 399 678 1,223 Construction and land development 4,820 — — 42 42 4,862 Other 160 1 — — 1 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 50,297
Credit Quality Indicators	The following tables present risk ratings by loan portfolio segment and origination year. The origination year is the year of origination or renewal. Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 17 $ 550 $ 338 $ 7 $ 285 $ — $ 5,695 $ 6,892 Special mention — — 23 — — — — 23 Classified — — — — — — — — Total $ 17 $ 550 $ 361 $ 7 $ 285 $ — $ 5,695 $ 6,915 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 59 $ 113 $ 200 $ 166 $ 168 $ 893 $ — $ 1,599 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 59 $ 113 $ 207 $ 166 $ 179 $ 898 $ — $ 1,622 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 256 $ 756 $ 650 $ 171 $ 25 $ 101 $ 815 $ 2,774 Special mention — 9 30 10 — — 8 57 Classified — 13 50 1 5 — 41 110 Total $ 256 $ 778 $ 730 $ 182 $ 30 $ 101 $ 864 $ 2,941 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Equity fund resources Pass $ 19 $ 78 $ 92 $ 40 $ 2 $ — $ 463 $ 694 Special mention — — — — — — — — Classified — — — — 1 — — 1 Total $ 19 $ 78 $ 92 $ 40 $ 3 $ — $ 463 $ 695 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 570 $ 1,533 $ 1,348 $ 503 $ 153 $ 236 $ 3,242 $ 7,585 Special mention — — 1 — — 1 — 2 Classified 1 88 24 48 1 4 1 167 Total $ 571 $ 1,621 $ 1,373 $ 551 $ 154 $ 241 $ 3,243 $ 7,754 Current period gross charge-offs $ — $ — $ 0.1 $ 2.0 $ — $ 0.1 $ 0.1 $ 2.3 CRE - owner occupied Pass $ 35 $ 180 $ 377 $ 320 $ 155 $ 551 $ 40 $ 1,658 Special mention — — 2 — — — — 2 Classified — 2 1 4 1 39 — 47 Total $ 35 $ 182 $ 380 $ 324 $ 156 $ 590 $ 40 $ 1,707 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 97 $ 563 $ 1,449 $ 474 $ 94 $ 571 $ 132 $ 3,380 Special mention — 34 — 67 — — — 101 Classified — — — 20 — 55 — 75 Total $ 97 $ 597 $ 1,449 $ 561 $ 94 $ 626 $ 132 $ 3,556 Current period gross charge-offs $ — $ — $ — $ 1.4 $ — $ 1.5 $ — $ 2.9 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the three months ended March 31, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 452 $ 1,678 $ 1,862 $ 780 $ 413 $ 346 $ 446 $ 5,977 Special mention — 94 49 — 40 — — 183 Classified — 98 — 93 1 13 — 205 Total $ 452 $ 1,870 $ 1,911 $ 873 $ 454 $ 359 $ 446 $ 6,365 Current period gross charge-offs $ — $ — $ — $ 5.0 $ — $ — $ — $ 5.0 Residential Pass $ 78 $ 278 $ 3,513 $ 7,890 $ 805 $ 458 $ 23 $ 13,045 Special mention — — — — — — — — Classified — — 32 35 5 7 — 79 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 78 $ 278 $ 3,545 $ 7,925 $ 810 $ 465 $ 23 $ 13,078 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Special mention — — — — — — — — Classified — — — — — — — — Total $ — $ 11 $ 17 $ 220 $ 513 $ 410 $ — $ 1,171 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 68 $ 906 $ 2,085 $ 325 $ 11 $ — $ 1,276 $ 4,671 Special mention — — 5 — — — — 5 Classified — — 19 — 51 — — 70 Total $ 68 $ 906 $ 2,109 $ 325 $ 62 $ — $ 1,276 $ 4,746 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 2 $ 1 $ 10 $ 2 $ 11 $ 68 $ 52 $ 146 Special mention — — — — — 3 — 3 Classified — — — — — 1 — 1 Total $ 2 $ 1 $ 10 $ 2 $ 11 $ 72 $ 52 $ 150 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Total by Risk Category Pass $ 1,653 $ 6,647 $ 11,941 $ 10,898 $ 2,635 $ 3,634 $ 12,184 $ 49,592 Special mention — 137 117 77 51 4 8 394 Classified 1 201 126 201 65 124 42 760 Cumulative fair value hedging adjustment — — — — — — — (46) Total $ 1,654 $ 6,985 $ 12,184 $ 11,176 $ 2,751 $ 3,762 $ 12,234 $ 50,700 Current period gross charge-offs $ — $ — $ 0.1 $ 8.4 $ — $ 1.6 $ 0.1 $ 10.2 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Warehouse lending Pass $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,391 $ 6,592 Special mention — — — — — — 26 26 Classified — — — — — — — — Total $ 582 $ 323 $ 7 $ 289 $ — $ — $ 5,417 $ 6,618 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 102 $ 167 $ 176 $ 169 $ 68 $ 848 $ — $ 1,530 Special mention — 7 — 11 — — — 18 Classified — — — — 6 — — 6 Total $ 102 $ 174 $ 176 $ 180 $ 74 $ 848 $ — $ 1,554 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 758 $ 774 $ 206 $ 22 $ 66 $ 38 $ 816 $ 2,680 Special mention 5 30 12 — — — 1 48 Classified 15 52 1 5 — — 7 80 Total $ 778 $ 856 $ 219 $ 27 $ 66 $ 38 $ 824 $ 2,808 Current period gross charge-offs $ 1.8 $ — $ — $ — $ — $ — $ — $ 1.8 Equity fund resources Pass $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Special mention — — — — — — — — Classified — — — — — — — — Total $ 154 $ 62 $ 21 $ 3 $ 1 $ — $ 604 $ 845 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 1,610 $ 1,454 $ 559 $ 185 $ 77 $ 196 $ 3,186 $ 7,267 Special mention 90 1 1 — — — 1 93 Classified 1 25 59 2 4 — 1 92 Total $ 1,701 $ 1,480 $ 619 $ 187 $ 81 $ 196 $ 3,188 $ 7,452 Current period gross charge-offs $ — $ — $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 7.3 CRE - owner occupied Pass $ 165 $ 344 $ 322 $ 163 $ 132 $ 444 $ 40 $ 1,610 Special mention — — — — — 1 — 1 Classified 2 1 4 1 1 38 — 47 Total $ 167 $ 345 $ 326 $ 164 $ 133 $ 483 $ 40 $ 1,658 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 593 $ 1,535 $ 566 $ 95 $ 419 $ 165 $ 132 $ 3,505 Special mention 34 — 66 — 35 68 — 203 Classified 24 8 48 — 43 24 — 147 Total $ 651 $ 1,543 $ 680 $ 95 $ 497 $ 257 $ 132 $ 3,855 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other CRE - non-owner occupied Pass $ 1,832 $ 1,784 $ 754 $ 457 $ 166 $ 206 $ 387 $ 5,586 Special mention 164 — 16 43 28 — — 251 Classified 28 — 93 1 14 1 — 137 Total $ 2,024 $ 1,784 $ 863 $ 501 $ 208 $ 207 $ 387 $ 5,974 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of December 31, 2023 and gross charge-offs for the three months ended March 31, 2023 2023 2022 2021 2020 2019 Prior (in millions) Residential Pass $ 324 $ 3,573 $ 7,985 $ 819 $ 270 $ 207 $ 20 $ 13,198 Special mention — — — — — — — — Classified 1 26 33 4 4 2 — 70 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 325 $ 3,599 $ 8,018 $ 823 $ 274 $ 209 $ 20 $ 13,287 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Special mention — — — — — — — — Classified — — — — — — — — Total $ 2 $ 8 $ 227 $ 534 $ 231 $ 221 $ — $ 1,223 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 1,013 $ 2,231 $ 385 $ 10 $ — $ — $ 1,151 $ 4,790 Special mention — — — — — — — — Classified 1 19 — 52 — — — 72 Total $ 1,014 $ 2,250 $ 385 $ 62 $ — $ — $ 1,151 $ 4,862 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 4 $ 10 $ 3 $ 11 $ 3 $ 62 $ 66 $ 159 Special mention — — — — — 1 — 1 Classified — — — — — 1 — 1 Total $ 4 $ 10 $ 3 $ 11 $ 3 $ 64 $ 66 $ 161 Current period gross charge-offs $ — $ 0.1 $ — $ — $ — $ — $ — $ 0.1 Total by Risk Category Pass $ 7,139 $ 12,265 $ 11,211 $ 2,757 $ 1,433 $ 2,387 $ 11,793 $ 48,985 Special mention 293 38 95 54 63 70 28 641 Classified 72 131 238 65 72 66 8 652 Cumulative fair value hedging adjustment — — — — — — — 19 Total $ 7,504 $ 12,434 $ 11,544 $ 2,876 $ 1,568 $ 2,523 $ 11,829 $ 50,297 Current period gross charge-offs $ 1.8 $ 0.1 $ 5.9 $ 1.2 $ — $ 0.1 $ 0.1 $ 9.2
Amortized Cost Basis of Loans Modified	The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at March 31, 2024 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 30 $ 30 1.0 % Other commercial and industrial — 8 — 8 0.1 CRE - owner occupied — 31 — 31 1.8 Construction and land development — 39 — 39 0.8 Total $ — $ 78 $ 30 $ 108 0.2 % Amortized Cost Basis at March 31, 2023 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ 5 $ 7 0.3 % Hotel franchise finance — 18 — 18 0.5 % Residential — — 1 1 0.0 % Total $ 2 $ 18 $ 6 $ 26 0.1 %
Collateral-Dependent Loans	The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: March 31, 2024 December 31, 2023 Real Estate Collateral Other Collateral Total Real Estate Collateral Other Collateral Total (in millions) Municipal & nonprofit $ — $ 5 $ 5 $ — $ 6 $ 6 Tech & innovation — 35 35 — — — Other commercial and industrial — 26 26 — 29 29 CRE - owner occupied 42 — 42 43 — 43 Hotel franchise finance 63 — 63 104 — 104 Other CRE - non-owner occupied 204 — 204 136 — 136 Construction and land development 69 — 69 71 — 71 Total $ 378 $ 66 $ 444 $ 354 $ 35 $ 389
Allowances for Credit Losses	The below tables reflect the activity in the ACL on loans HFI by loan portfolio segment, which includes an estimate of future recoveries: Three Months Ended March 31, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 1.5 $ — $ — $ 7.3 Municipal & nonprofit 14.7 (0.8) — — 13.9 Tech & innovation 42.1 5.9 — — 48.0 Equity fund resources 1.3 (0.1) — — 1.2 Other commercial and industrial 81.4 (12.4) 2.3 (0.4) 67.1 CRE - owner occupied 6.0 0.2 — — 6.2 Hotel franchise finance 33.4 5.3 2.9 — 35.8 Other CRE - non-owner occupied 96.0 13.7 5.0 — 104.7 Residential 23.1 (1.0) — — 22.1 Residential - EBO — — — — — Construction and land development 30.4 1.5 — — 31.9 Other 2.5 (0.4) — — 2.1 Total $ 336.7 $ 13.4 $ 10.2 $ (0.4) $ 340.3 Three Months Ended March 31, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (1.8) $ — $ — $ 6.6 Municipal & nonprofit 15.9 2.5 — — 18.4 Tech & innovation 30.8 7.4 1.8 — 36.4 Equity fund resources 6.4 (3.1) — — 3.3 Other commercial and industrial 85.9 (30.7) 7.3 (3.2) 51.1 CRE - owner occupied 7.1 1.5 — — 8.6 Hotel franchise finance 46.9 0.8 — — 47.7 Other CRE - non-owner occupied 47.4 19.0 — — 66.4 Residential 30.4 1.3 — — 31.7 Residential - EBO — — — — — Construction and land development 27.4 4.1 — — 31.5 Other 3.1 — 0.1 — 3.0 Total $ 309.7 $ 1.0 $ 9.2 $ (3.2) $ 304.7 The below table reflects the activity in the ACL on unfunded loan commitments: Three Months Ended March 31, 2024 2023 (in millions) Balance, beginning of period $ 31.6 $ 47.0 Provision for (Recovery of) credit losses 1.5 (2.2) Balance, end of period $ 33.1 $ 44.8 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: March 31, 2024 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,915 $ — $ 6,915 $ 7.3 $ — $ 7.3 Municipal & nonprofit 1,617 5 1,622 13.2 0.7 13.9 Tech & innovation 2,832 109 2,941 40.8 7.2 48.0 Equity fund resources 695 — 695 1.2 — 1.2 Other commercial and industrial 7,591 163 7,754 62.5 4.6 67.1 CRE - owner occupied 1,664 43 1,707 6.2 — 6.2 Hotel franchise finance 3,481 75 3,556 35.4 0.4 35.8 Other CRE - non-owner occupied 6,161 204 6,365 104.7 — 104.7 Residential 13,078 — 13,078 22.1 — 22.1 Residential EBO 1,171 — 1,171 — — — Construction and land development 4,676 70 4,746 31.9 — 31.9 Other 149 1 150 2.1 — 2.1 Total $ 50,030 $ 670 $ 50,700 $ 327.4 $ 12.9 $ 340.3 December 31, 2023 Loans Allowance Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total Collectively Evaluated for Credit Loss Individually Evaluated for Credit Loss Total (in millions) Warehouse lending $ 6,618 $ — $ 6,618 $ 5.8 $ — $ 5.8 Municipal & nonprofit 1,548 6 1,554 13.7 1.0 14.7 Tech & innovation 2,729 79 2,808 38.3 3.8 42.1 Equity fund resources 845 — 845 1.3 — 1.3 Other commercial and industrial 7,362 90 7,452 64.6 16.8 81.4 CRE - owner occupied 1,613 45 1,658 6.0 — 6.0 Hotel franchise finance 3,708 147 3,855 33.4 — 33.4 Other CRE - non-owner occupied 5,838 136 5,974 96.0 — 96.0 Residential 13,287 — 13,287 23.1 — 23.1 Residential EBO 1,223 — 1,223 — — — Construction and land development 4,791 71 4,862 30.4 — 30.4 Other 161 — 161 2.5 — 2.5 Total $ 49,723 $ 574 $ 50,297 $ 315.1 $ 21.6 $ 336.7

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
Mortgage Servicing Rights (Tables)	Mar. 31, 2024
Transfers and Servicing [Abstract]
Changes in Fair Value of the Company's MSR Portfolio	The following table presents the changes in fair value of the Company's MSR portfolio related to its mortgage banking business and other information related to its servicing portfolio: Three Months Ended March 31, 2024 2023 (in millions) Balance, beginning of period $ 1,124 $ 1,148 Additions from loans sold with servicing rights retained 189 142 Carrying value of MSRs sold (156) (350) Change in fair value 60 (8) Mark to market adjustments — 3 Realization of cash flows (39) (25) Balance, end of period $ 1,178 $ 910 Unpaid principal balance of mortgage loans serviced for others $ 65,620 $ 58,466
Effect of Hypothetical Changes in the Fair Value of MSRs	The following table presents the effect of hypothetical changes in the fair value of MSRs caused by assumed immediate changes in interest rates, discount rates, and prepayment speeds that are used to determine fair value: March 31, 2024 (in millions) Fair value of mortgage servicing rights $ 1,178 Increase (decrease) in fair value resulting from: Interest rate change of 50 basis points Adverse change (65) Favorable change 57 Discount rate change of 50 basis points Increase (23) Decrease 24 Conditional prepayment rate change of 1% Increase (33) Decrease 36 Cost to service change of 10% Increase (14) Decrease 14

Deposits (Tables)

Deposits (Tables)	3 Months Ended
Deposits (Tables)	Mar. 31, 2024
Other Liabilities Disclosure [Abstract]
Deposits by Type	The table below summarizes deposits by type: March 31, 2024 December 31, 2023 (in millions) Non-interest-bearing demand deposits $ 18,399 $ 14,520 Interest-bearing transaction accounts 16,965 15,916 Savings and money market accounts 16,194 14,791 Time certificates of deposit ($250,000 or more) 1,683 1,478 Other time deposits (1) 8,987 8,628 Total deposits $ 62,228 $ 55,333 (1) Retail brokered time deposits over $250,000 of $5.7 billion and $5.8 billion as of March 31, 2024 and December 31, 2023, respectively, are included within Other time deposits as these deposits are generally participated out by brokers in shares below the FDIC insurance limit.
Summary of Contractual Maturities for Time Deposits	A summary of the contractual maturities for all time deposits as of March 31, 2024 is as follows: (in millions) 2024 $ 8,311 2025 2,328 2026 26 2027 3 2028 1 Thereafter 1 Total $ 10,670

Other Borrowings (Tables)

Other Borrowings (Tables)	3 Months Ended
Other Borrowings (Tables)	Mar. 31, 2024
Debt Disclosure [Abstract]
Company's Borrowings	The following table summarizes the Company’s other borrowings by type: March 31, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 5,750 6,200 Repurchase agreements 8 382 Secured borrowings 22 27 Total short-term borrowings $ 5,780 $ 6,784 Long-Term: Credit linked notes, net 441 446 Total long-term borrowings $ 441 $ 446 Total other borrowings $ 6,221 $ 7,230 The Company's outstanding credit linked note issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 89 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 177 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 189 2 Total $ 455 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 90 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 179 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 191 3 Total $ 460 $ 8 (1) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 11.00% (or, a weighted average spread of 7.80%) on a reference pool balance of $1.8 billion as of March 31, 2024 and December 31, 2023. (2) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 15.00% (or, a weighted average spread of 6.00%) on a reference pool balance of $3.5 billion and $3.6 billion as of March 31, 2024 and December 31, 2023, respectively. (3) There are six classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 3.15% to 8.50% (or, a weighted average spread of 4.67%) on a reference pool balance of $3.7 billion and $3.8 billion as of March 31, 2024 and December 31, 2023, respectively. The Company's subordinated debt issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 (1) Notes are redeemable, in whole or in part, beginning on June 15, 2026 at their principal amount plus accrued and unpaid interest and has a fixed interest rate of 3.00%. The notes also convert to a variable rate of three-month SOFR plus 225 basis points on this date. (2) Debt is redeemable, in whole or in part, on or after June 1, 2025 at its principal amount plus accrued and unpaid interest and has a fixed interest rate of 5.25% through June 1, 2025 and then converts to a variable rate per annum equal to three-month SOFR plus 512 basis points.

Qualifying Debt (Tables)

Qualifying Debt (Tables)	3 Months Ended
Qualifying Debt (Tables)	Mar. 31, 2024
Debt Disclosure [Abstract]
Company's Borrowings	The following table summarizes the Company’s other borrowings by type: March 31, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 5,750 6,200 Repurchase agreements 8 382 Secured borrowings 22 27 Total short-term borrowings $ 5,780 $ 6,784 Long-Term: Credit linked notes, net 441 446 Total long-term borrowings $ 441 $ 446 Total other borrowings $ 6,221 $ 7,230 The Company's outstanding credit linked note issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 89 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 177 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 189 2 Total $ 455 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) Residential mortgage loans (1) December 12, 2022 October 25, 2052 SOFR + 7.80% $ 90 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 179 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 191 3 Total $ 460 $ 8 (1) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 11.00% (or, a weighted average spread of 7.80%) on a reference pool balance of $1.8 billion as of March 31, 2024 and December 31, 2023. (2) There are multiple classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 2.25% to 15.00% (or, a weighted average spread of 6.00%) on a reference pool balance of $3.5 billion and $3.6 billion as of March 31, 2024 and December 31, 2023, respectively. (3) There are six classes of these notes, each with an interest rate of SOFR plus a spread that ranges from 3.15% to 8.50% (or, a weighted average spread of 4.67%) on a reference pool balance of $3.7 billion and $3.8 billion as of March 31, 2024 and December 31, 2023, respectively. The Company's subordinated debt issuances are detailed in the tables below: March 31, 2024 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 December 31, 2023 Description Issuance Date Maturity Date Interest Rate Principal Debt Issuance Costs (in millions) WAL fixed-to-variable-rate (1) June 2021 June 15, 2031 3.00 % $ 600 $ 6 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 1 Total $ 825 $ 7 (1) Notes are redeemable, in whole or in part, beginning on June 15, 2026 at their principal amount plus accrued and unpaid interest and has a fixed interest rate of 3.00%. The notes also convert to a variable rate of three-month SOFR plus 225 basis points on this date. (2) Debt is redeemable, in whole or in part, on or after June 1, 2025 at its principal amount plus accrued and unpaid interest and has a fixed interest rate of 5.25% through June 1, 2025 and then converts to a variable rate per annum equal to three-month SOFR plus 512 basis points.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
Accumulated Other Comprehensive Income (Loss) (Tables)	Mar. 31, 2024
Equity [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income	The following table summarizes the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods indicated: Three Months Ended March 31, Unrealized holding gains (losses) on AFS securities Unrealized holding losses on SERP Unrealized holding gains (losses) on junior subordinated debt Impairment loss on securities Total (in millions) Balance, December 31, 2023 $ (516.6) $ (0.3) $ 2.8 $ 1.2 $ (512.9) Other comprehensive loss before reclassifications (44.9) — (0.5) — (45.4) Amounts reclassified from AOCI 0.7 — — — 0.7 Net current-period other comprehensive loss (44.2) — (0.5) — (44.7) Balance, March 31, 2024 $ (560.8) $ (0.3) $ 2.3 $ 1.2 $ (557.6) Balance, December 31, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive income (loss) before reclassifications 60.1 — (1.1) — 59.0 Amounts reclassified from AOCI 9.3 — — 1.2 10.5 Net current-period other comprehensive income (loss) 69.4 — (1.1) 1.2 69.5 Balance, March 31, 2023 $ (594.3) $ (0.3) $ 1.9 $ 1.2 $ (591.5)

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	3 Months Ended
Derivatives and Hedging Activities (Tables)	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	As of March 31, 2024 and December 31, 2023, the following amounts are reflected on the Consolidated Balance Sheet related to cumulative basis adjustments for outstanding fair value hedges: March 31, 2024 December 31, 2023 Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 3,857 $ 66 $ 3,875 $ (6) (1) Included in the carrying value of the hedged assets/(liabilities). (2) As of March 31, 2024, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.6 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $(46) million.
Derivative Instruments, Gain (Loss)	For loans, the gain or loss on the hedged item is included in interest income, as shown in the table below. Three Months Ended March 31, 2024 2023 Income Statement Classification Gain/(Loss) on Swaps Gain/(Loss) on Hedged Item Gain/(Loss) on Swaps Gain/(Loss) on Hedged Item (in millions) Interest income $ 72.0 $ (72.5) $ (4.3) $ 4.3 The following table summarizes the net gain (loss) on derivatives included in income: Three Months Ended March 31, 2024 2023 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ (8.1) $ 11.5 Forward contracts 16.7 (36.8) Interest rate swaps (2.2) 1.2 Other contracts 0.7 (0.5) Total gain (loss) $ 7.1 $ (24.6) Net loan servicing revenue: Forward contracts $ (16.3) $ (1.6) Futures contracts 10.7 (4.0) Interest rate swaps (36.3) 19.0 Total (loss) gain $ (41.9) $ 13.4
Schedule of Fair Value of the Company's Derivative Instruments	The following table summarizes the fair value of the Company's derivative instruments on a gross basis as of March 31, 2024, December 31, 2023, and March 31, 2023. The change in the notional amounts of these derivatives from March 31, 2023 to March 31, 2024 indicates the volume of the Company's derivative transaction activity during these periods. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow the Company to settle all derivative contracts with the same counterparty on a net basis and to offset the net derivative position with the related cash collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, the Company does not adjust those derivative amounts with counterparties. March 31, 2024 December 31, 2023 March 31, 2023 Fair Value Fair Value Fair Value Notional Derivative Assets Derivative Liabilities Notional Derivative Assets Derivative Liabilities Notional Derivative Assets Derivative Liabilities (in millions) Derivatives designated as hedging instruments: Fair value hedges Interest rate contracts $ 3,884 $ 67 $ — $ 3,895 $ 19 $ 24 $ 470 $ 14 $ 1 Total $ 3,884 $ 67 $ — $ 3,895 $ 19 $ 24 $ 470 $ 14 $ 1 Derivatives not designated as hedging instruments: Foreign currency contracts $ 165 $ 1 $ 1 $ 135 $ 1 $ 1 $ 189 $ 2 $ 1 Forward purchase contracts 5,590 13 2 5,544 26 — 7,814 34 5 Forward sales contracts 8,380 4 28 7,626 1 55 9,702 3 64 Futures purchase contracts (1), (2) 124 — — 124 — — — — — Futures sales contracts (1), (2) 9,996 — — 10,906 — — 9,710 — — Interest rate lock commitments 1,810 10 1 1,822 18 — 1,557 14 1 Interest rate contracts 3,890 20 21 3,628 19 20 1,983 5 6 Risk participation agreements 75 — — 72 — — 51 — — Equity warrants 57 18 — 55 4 — 50 3 — Total $ 30,087 $ 66 $ 53 $ 29,912 $ 69 $ 76 $ 31,056 $ 61 $ 77 Margin 139 8 202 (9) 5 (14) Total, including margin $ 30,087 $ 205 $ 61 $ 29,912 $ 271 $ 67 $ 31,056 $ 66 $ 63 (1) The Company enters into futures purchase and sales contracts that are subject to daily remargining and almost all of which are based on three-month SOFR to hedge against its MSR valuation exposure. The notional amount on these contracts is substantial as these contracts have a short duration and are intended to cover the longer duration of MSR hedges. (2) The notional amounts previously reported for March 31, 2023 have been adjusted to account for the impact of offsetting contracts. To close a futures contract prior to settlement, the Company purchases an offsetting future with the same terms as the original contract and these contracts no longer require settlement. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in Other assets or Other liabilities on the Consolidated Balance Sheet, as summarized in the table below: March 31, 2024 December 31, 2023 March 31, 2023 Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) Gross amount of recognized assets (liabilities) Gross offset Net assets (liabilities) (in millions) Derivatives subject to master netting arrangements: Assets Foreign currency contracts $ 1 $ — $ 1 $ — $ — $ — $ — $ — $ — Forward purchase contracts 13 — 13 26 — 26 30 — 30 Forward sales contracts 4 — 4 1 — 1 3 — 3 Interest rate contracts 84 — 84 31 — 31 14 — 14 Margin 139 — 139 202 — 202 5 — 5 Netting — (33) (33) — (67) (67) — (38) (38) $ 241 $ (33) $ 208 $ 260 $ (67) $ 193 $ 52 $ (38) $ 14 Liabilities Foreign currency contracts $ (1) $ — $ (1) $ (1) $ — $ (1) $ — $ — $ — Forward purchase contracts (2) — (2) — — — (4) — (4) Forward sales contracts (27) — (27) (55) — (55) (52) — (52) Interest rate contracts (2) — (2) (31) — (31) (1) — (1) Margin (8) — (8) 9 — 9 14 — 14 Netting — 33 33 — 67 67 — 38 38 $ (40) $ 33 $ (7) $ (78) $ 67 $ (11) $ (43) $ 38 $ (5) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ — $ — $ — $ 1 $ — $ 1 $ 2 $ — $ 2 Forward purchase contracts — — — — — 4 — 4 Interest rate lock commitments 10 — 10 18 — 18 14 — 14 Interest rate contracts 3 — 3 7 — 7 5 — 5 Equity warrants 18 — 18 4 — 4 3 — 3 $ 31 $ — $ 31 $ 30 $ — $ 30 $ 28 $ — $ 28 Liabilities Foreign currency contracts $ — $ — $ — $ — $ — $ — $ (1) $ — $ (1) Forward purchase contracts — — — — — — (1) — (1) Forward sales contracts (1) — (1) — — — (12) — (12) Interest rate lock commitments (1) — (1) — — — (1) — (1) Interest rate contracts (19) — (19) (13) — (13) (6) — (6) $ (21) $ — $ (21) $ (13) $ — $ (13) $ (21) $ — $ (21) Total derivatives and margin Assets $ 272 $ (33) $ 239 $ 290 $ (67) $ 223 $ 80 $ (38) $ 42 Liabilities $ (61) $ 33 $ (28) $ (91) $ 67 $ (24) $ (64) $ 38 $ (26)

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
Earnings per Share (Tables)	Mar. 31, 2024
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents the calculation of basic and diluted EPS: Three Months Ended March 31, 2024 2023 (in millions, except per share amounts) Weighted average shares - basic 108.5 108.1 Dilutive effect of stock awards 0.5 0.2 Weighted average shares - diluted 109.0 108.3 Net income available to common stockholders $ 174.2 $ 139.0 Earnings per Common Share: Basic $ 1.61 $ 1.29 Diluted 1.60 1.28

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
Commitments and Contingencies (Tables)	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit	A summary of the contractual amounts for unfunded commitments and letters of credit are as follows: March 31, 2024 December 31, 2023 (in millions) Commitments to extend credit, including unsecured loan commitments of $937 at March 31, 2024 and $989 at December 31, 2023 $ 13,106 $ 13,291 Credit card commitments and financial guarantees 427 418 Letters of credit, including unsecured letters of credit of $6 at March 31, 2024 and $4 at December 31, 2023 238 222 Total $ 13,771 $ 13,931

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	3 Months Ended
Fair Value Accounting (Tables)	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Gains and Losses from Fair Value Changes Included in Consolidated Statement of Operations	The following table presents unrealized gains and losses from fair value changes on junior subordinated debt: Three Months Ended March 31, 2024 2023 (in millions) Unrealized losses $ (0.7) $ (1.5) Changes included in OCI, net of tax (0.5) (1.1)
Fair Value of Assets and Liabilities	The fair value of assets and liabilities measured at fair value on a recurring basis was determined using the following inputs: Fair Value Measurements at the End of the Reporting Period Using: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value March 31, 2024 (in millions) Assets: Available-for-sale debt securities U.S. Treasury securities $ 7,011 $ — $ — $ 7,011 Residential MBS issued by GSEs — 4,536 — 4,536 Private label residential MBS — 1,091 — 1,091 Tax-exempt — 849 — 849 Commercial MBS issued by GSEs — 586 — 586 Corporate debt securities — 367 — 367 Other 28 41 — 69 Total AFS debt securities $ 7,039 $ 7,470 $ — $ 14,509 Equity securities Preferred stock $ 105 $ — $ — $ 105 CRA investments 25 — — 25 Total equity securities $ 130 $ — $ — $ 130 Loans HFS (2) $ — $ 1,809 $ 3 $ 1,812 MSRs — — 1,178 1,178 Derivative assets (1) — 105 28 133 Liabilities: Junior subordinated debt (3) $ — $ — $ 64 $ 64 Derivative liabilities (1) — 52 1 53 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $66 million as of March 31, 2024 for the effective portion of the hedge, which relates to the fair value of the hedges put in place to mitigate against fluctuations in interest rates. Derivative assets and liabilities exclude margin of $139 million and $8 million, respectively. (2) Includes only the portion of loans HFS that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. (3) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. Fair Value Measurements at the End of the Reporting Period Using: Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value December 31, 2023 (in millions) Assets: Available-for-sale debt securities U.S. Treasury securities $ 4,853 $ — $ — $ 4,853 Residential MBS issued by GSEs — 1,972 — 1,972 CLO — 1,399 — 1,399 Private label residential MBS — 1,117 — 1,117 Tax-exempt — 858 — 858 Commercial MBS issued by GSEs — 530 — 530 Corporate debt securities — 367 — 367 Other 28 41 — 69 Total AFS debt securities $ 4,881 $ 6,284 $ — $ 11,165 Equity securities Preferred stock $ 100 $ — $ — $ 100 CRA investments 26 — — 26 Total equity securities $ 126 $ — $ — $ 126 Loans - HFS (2) $ — $ 1,377 $ 3 $ 1,380 Mortgage servicing rights — — 1,124 1,124 Derivative assets (1) — 66 22 88 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 100 — 100 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $6 million as of December 31, 2023 for the effective portion of the hedge, which relates to the fair value of the hedges put in place to mitigate against fluctuations in interest rates. Derivative assets and liabilities exclude margin of $202 million and $(9) million, respectively. (2) Includes only the portion of loans HFS that is recorded at fair value at each reporting period pursuant to the election of FVO treatment. (3) Includes only the portion of junior subordinated debt that is recorded at fair value at each reporting period pursuant to the election of FVO treatment.
Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis	The change in Level 3 liabilities measured at fair value on a recurring basis included in OCI was as follows: Junior Subordinated Debt Three Months Ended March 31, 2024 2023 (in millions) Beginning balance $ (62.8) $ (62.5) Change in fair value (1) (0.7) (1.5) Ending balance $ (63.5) $ (64.0) (1) Unrealized losses attributable to changes in the fair value of junior subordinated debt are recorded in OCI, net of tax, and totaled $(0.5) million and $(1.1) million for three months ended March 31, 2024 and 2023, respectively. The change in Level 3 assets and liabilities measured at fair value on a recurring basis included in income was as follows: Three Months Ended March 31, 2024 MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,124 $ 18 Purchases and additions 189 4,060 Sales and payments (156) — Settlement of IRLCs upon acquisition or origination of loans HFS — (4,067) Change in fair value 60 (1) Realization of cash flows (39) — Balance, end of period $ 1,178 $ 10 Changes in unrealized gains for the period (2) $ 46 $ 10 Three Months Ended March 31, 2023 MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,148 $ 2 Purchases and additions 142 2,946 Sales and payments (350) — Settlement of IRLCs upon acquisition or origination of loans HFS — (2,935) Change in fair value (8) 1 Mark to market adjustments 3 — Realization of cash flows (25) — Balance, end of period $ 910 $ 14 Changes in unrealized gains for the period (2) $ (3) $ 14 (1) IRLC asset and liability positions are presented net. (2) Amounts recognized as part of non-interest income. The significant unobservable inputs used in the fair value measurements of these Level 3 assets and liabilities were as follows: March 31, 2024 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) (43) - 297 213 Conditional prepayment rate (1) 9.1% - 22.0% 16.1 % Recapture rate 20.0% - 20.0% 20 % Servicing fee rate (in basis points) 25.0 - 56.5 38.4 Cost to service $75 - $95 $ 86 IRLCs: Servicing fee multiple 3.5 - 5.7 4.6 Pull-through rate 68% - 100% 86 % December 31, 2023 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) 29 - 253 213 Conditional prepayment rate (1) 9.5% - 23.9% 17.4 % Recapture rate 20.0% - 20.0% 20.0 % Servicing fee rate (in basis points) 25.0 - 56.5 35.6 Cost to service $93 - $100 $ 95 IRLCs: Servicing fee multiple 3.2 - 5.4 4.3 Pull-through rate 68% - 100% 89 % (1) Lifetime total prepayment speed annualized. For Level 3 assets measured at fair value on a nonrecurring basis as of period end, the significant unobservable inputs used in the fair value measurements were as follows: March 31, 2024 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 441 Collateral method Third party appraisal Costs to sell 6.0% to 10.0% Discounted cash flow method Discount rate Contractual loan rate 3.0% to 8.0% Scheduled cash collections Probability of default 0% to 20.0% Proceeds from non-real estate collateral Loss given default 0% to 70.0% Other assets acquired through foreclosure 8 Collateral method Third party appraisal Costs to sell 4.0% to 10.0% December 31, 2023 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 379 Collateral method Third party appraisal Costs to sell 6.0% to 10.0% Discounted cash flow method Discount rate Contractual loan rate 3.0% to 8.0% Scheduled cash collections Probability of default 0% to 20.0% Proceeds from non-real estate collateral Loss given default 0% to 70.0% Other assets acquired through foreclosure 8 Collateral method Third party appraisal Costs to sell 4.0% to 10.0%
Assets Measured at Fair Value on Nonrecurring Basis	The significant unobservable inputs used in the fair value measurements of these Level 3 liabilities were as follows: March 31, 2024 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 64 Discounted cash flow Implied credit rating of the Company 8.73 % December 31, 2023 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 63 Discounted cash flow Implied credit rating of the Company 8.92 % Fair Value Measurements at the End of the Reporting Period Using Total Quoted Prices in Active Markets for Identical Assets Active Markets for Similar Assets Unobservable Inputs (in millions) As of March 31, 2024: Loans HFI $ 441 $ — $ — $ 441 Other assets acquired through foreclosure 8 — — 8 As of December 31, 2023: Loans HFI $ 379 $ — $ — $ 379 Other assets acquired through foreclosure 8 — — 8
Estimated Fair Value of Financial Instruments	The following is a summary of the difference between the aggregate fair value and the aggregate UPB of loans HFS for which the FVO has been elected: March 31, 2024 December 31, 2023 Fair value UPB Difference Fair value UPB Difference (in millions) Loans HFS: Current through 89 days delinquent $ 1,812 $ 1,755 $ 57 $ 1,379 $ 1,319 $ 60 90 days or more delinquent — — — 1 2 (1) Total $ 1,812 $ 1,755 $ 57 $ 1,380 $ 1,321 $ 59 The estimated fair value of the Company’s financial instruments is as follows: March 31, 2024 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,461 $ — $ 1,253 $ — $ 1,253 AFS 14,509 7,039 7,470 — 14,509 Equity 130 130 — — 130 Derivative assets (1) 133 — 105 28 133 Loans HFS 1,841 — 1,818 23 1,841 Loans HFI, net 50,360 — — 47,245 47,245 Mortgage servicing rights 1,178 — — 1,178 1,178 Accrued interest receivable 360 — 360 — 360 Financial liabilities: Deposits $ 62,228 $ — $ 62,263 $ — $ 62,263 Other borrowings 6,221 — 6,184 — 6,184 Qualifying debt 896 — 734 77 811 Derivative liabilities (1) 53 — 52 1 53 Accrued interest payable 168 — 168 — 168 (1) Derivative assets and liabilities exclude margin of $139 million and $8 million, respectively. December 31, 2023 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,429 $ — $ 1,251 $ — $ 1,251 AFS 11,165 4,881 6,284 — 11,165 Equity securities 126 126 — — 126 Derivative assets (1) 84 — 66 18 84 Loans HFS 1,402 — 1,379 23 1,402 Loans HFI, net 49,960 — — 46,877 46,877 Mortgage servicing rights 1,124 — — 1,124 1,124 Accrued interest receivable 370 — 370 — 370 Financial liabilities: Deposits $ 55,333 $ — $ 55,379 $ — $ 55,379 Other borrowings 7,230 — 7,192 — 7,192 Qualifying debt 895 — 734 76 810 Derivative liabilities (1) 100 — 100 — 100 Accrued interest payable 151 — 151 — 151 (1) Derivative assets and liabilities exclude margin of $202 million and $(9) million, respectively.

Segments (Tables)

Segments (Tables)	3 Months Ended
Segments (Tables)	Mar. 31, 2024
Segment Reporting [Abstract]
Operating Segment Information	The following is a summary of operating segment information for the periods indicated: Balance Sheet: Consolidated Company Commercial Consumer Related Corporate & Other At March 31, 2024: (in millions) Assets: Cash, cash equivalents, and investments $ 19,890 $ 12 $ — $ 19,878 Loans HFS 1,841 — 1,841 — Loans HFI, net of deferred fees and costs 50,700 29,642 21,058 — Less: allowance for credit losses (340) (287) (53) — Net loans HFI 50,360 29,355 21,005 — Other assets acquired through foreclosure, net 8 8 — — Goodwill and other intangible assets, net 666 291 375 — Other assets 4,224 414 1,961 1,849 Total assets $ 76,989 $ 30,080 $ 25,182 $ 21,727 Liabilities: Deposits $ 62,228 $ 25,146 $ 30,481 $ 6,601 Borrowings and qualifying debt 7,117 9 21 7,087 Other liabilities 1,472 139 421 912 Total liabilities 70,817 25,294 30,923 14,600 Allocated equity: 6,172 2,590 1,814 1,768 Total liabilities and stockholders' equity $ 76,989 $ 27,884 $ 32,737 $ 16,368 Excess funds provided (used) — (2,196) 7,555 (5,359) Income Statement: Three Months Ended March 31, 2024: (in millions) Net interest income $ 598.9 $ 288.8 $ 292.6 $ 17.5 Provision for (recovery of) credit losses 15.2 15.3 (0.4) 0.3 Net interest income after provision for credit losses 583.7 273.5 293.0 17.2 Non-interest income 129.9 26.1 95.7 8.1 Non-interest expense 481.8 156.0 295.9 29.9 Income before income taxes 231.8 143.6 92.8 (4.6) Income tax expense (benefit) 54.4 33.7 21.8 (1.1) Net income (loss) $ 177.4 $ 109.9 $ 71.0 $ (3.5) Balance Sheet: Consolidated Company Commercial Consumer Related Corporate At December 31, 2023: (in millions) Assets: Cash, cash equivalents, and investments $ 14,569 $ 13 $ 125 $ 14,431 Loans held for sale 1,402 — 1,402 — Loans, net of deferred fees and costs 50,297 29,136 21,161 — Less: allowance for credit losses (337) (284) (53) — Total loans 49,960 28,852 21,108 — Other assets acquired through foreclosure, net 8 8 — — Goodwill and other intangible assets, net 669 292 377 — Other assets 4,254 390 1,826 2,038 Total assets $ 70,862 $ 29,555 $ 24,838 $ 16,469 Liabilities: Deposits $ 55,333 $ 23,897 $ 24,925 $ 6,511 Borrowings and qualifying debt 8,125 7 402 7,716 Other liabilities 1,326 109 338 879 Total liabilities 64,784 24,013 25,665 15,106 Allocated equity: 6,078 2,555 1,790 1,733 Total liabilities and stockholders' equity $ 70,862 $ 26,568 $ 27,455 $ 16,839 Excess funds provided (used) — (2,987) 2,617 370 Income Statements: Three Months Ended March 31, 2023: (in millions) Net interest income $ 609.9 $ 389.4 $ 199.3 $ 21.2 Provision for (recovery of) credit losses 19.4 (2.7) 1.5 20.6 Net interest income after provision for credit losses 590.5 392.1 197.8 0.6 Non-interest income (58.0) (96.7) 51.0 (12.3) Non-interest expense 347.9 136.0 192.0 19.9 Income (loss) before income taxes 184.6 159.4 56.8 (31.6) Income tax expense (benefit) 42.4 38.5 12.8 (8.9) Net income (loss) $ 142.2 $ 120.9 $ 44.0 $ (22.7)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 Subsidiary
Significant Of Accounting Policies [Line Items]
Number of unconsolidated subsidiaries	8

Investment Securities - Carryin

Investment Securities - Carrying Amounts and Fair Values of Investment Securities (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Held-to-maturity
Amortized cost	$ 1,461	$ 1,429
Gross unrealized gains	0	1
Gross unrealized (losses)	(208)	(179)
Investment securities - HTM, fair value	1,253	1,251
Available-for-sale debt securities
Amortized Cost	15,251	11,849
Gross unrealized gains	12	18
Gross unrealized (losses)	(754)	(702)
Fair value	14,509	11,165
Tax-exempt
Held-to-maturity
Amortized cost	1,278	1,243
Gross unrealized gains	0	1
Gross unrealized (losses)	(169)	(140)
Investment securities - HTM, fair value	1,109	1,104
Available-for-sale debt securities
Amortized Cost	927	925
Gross unrealized gains	0	0
Gross unrealized (losses)	(78)	(67)
Fair value	849	858
Private label residential MBS
Held-to-maturity
Amortized cost	183	186
Gross unrealized gains	0	0
Gross unrealized (losses)	(39)	(39)
Investment securities - HTM, fair value	144	147
Available-for-sale debt securities
Amortized Cost	1,301	1,320
Gross unrealized gains	1	1
Gross unrealized (losses)	(211)	(204)
Fair value	1,091	1,117
U.S. Treasury securities
Available-for-sale debt securities
Amortized Cost	7,019	4,853
Gross unrealized gains	0	1
Gross unrealized (losses)	(8)	(1)
Fair value	7,011	4,853
Residential MBS issued by GSEs
Available-for-sale debt securities
Amortized Cost	4,928	2,328
Gross unrealized gains	3	3
Gross unrealized (losses)	(395)	(359)
Fair value	4,536	1,972
Commercial MBS issued by GSEs
Available-for-sale debt securities
Amortized Cost	591	531
Gross unrealized gains	5	8
Gross unrealized (losses)	(10)	(9)
Fair value	586	530
Corporate debt securities
Available-for-sale debt securities
Amortized Cost	411	411
Gross unrealized gains	0	0
Gross unrealized (losses)	(44)	(44)
Fair value	367	367
Other
Available-for-sale debt securities
Amortized Cost	74	74
Gross unrealized gains	3	4
Gross unrealized (losses)	(8)	(9)
Fair value	$ 69	69
CLO
Available-for-sale debt securities
Amortized Cost		1,407
Gross unrealized gains		1
Gross unrealized (losses)		(9)
Fair value		$ 1,399

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	$ 130		$ 126
Unrealized gains (losses) on assets measured at fair value, net	$ 3.9	$ (8.5)
Number of AFS debt securities in an unrealized loss position \| security	770		708
Fair value	$ 14,509		$ 11,165
Provision for Credit Losses	(0.1)	19.3
Charge-offs	0	(17.1)
Accrued interest receivable	5		5
Carrying value of securities sold	1,400	459
Net gain (loss) recognized	(0.9)	$ (12.5)
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Fair value	$ 8,000		$ 7,700

Investment Securities - Unreali

Investment Securities - Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	$ 15	$ 7
Less Than Twelve Months, Fair Value	7,633	2,449
More Than Twelve Months, Gross Unrealized Losses	739	695
More Than Twelve Months, Fair Value	3,849	4,655
Total Gross Unrealized Losses	754	702
Total Fair Value	11,482	7,104
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	8	1
Less Than Twelve Months, Fair Value	6,338	2,208
More Than Twelve Months, Gross Unrealized Losses	0	0
More Than Twelve Months, Fair Value	0	0
Total Gross Unrealized Losses	8	1
Total Fair Value	6,338	2,208
Residential MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	5	3
Less Than Twelve Months, Fair Value	1,125	174
More Than Twelve Months, Gross Unrealized Losses	390	356
More Than Twelve Months, Fair Value	1,570	1,551
Total Gross Unrealized Losses	395	359
Total Fair Value	2,695	1,725
Private label residential MBS
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	0	0
Less Than Twelve Months, Fair Value	0	0
More Than Twelve Months, Gross Unrealized Losses	211	204
More Than Twelve Months, Fair Value	997	1,020
Total Gross Unrealized Losses	211	204
Total Fair Value	997	1,020
Tax-exempt
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	1	3
Less Than Twelve Months, Fair Value	33	67
More Than Twelve Months, Gross Unrealized Losses	77	64
More Than Twelve Months, Fair Value	815	773
Total Gross Unrealized Losses	78	67
Total Fair Value	848	840
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	1	0
Less Than Twelve Months, Fair Value	137	0
More Than Twelve Months, Gross Unrealized Losses	9	9
More Than Twelve Months, Fair Value	52	53
Total Gross Unrealized Losses	10	9
Total Fair Value	189	53
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	0	0
Less Than Twelve Months, Fair Value	0	0
More Than Twelve Months, Gross Unrealized Losses	44	44
More Than Twelve Months, Fair Value	360	359
Total Gross Unrealized Losses	44	44
Total Fair Value	360	359
Corporate Bond Securities, With ACL
Debt Securities, Available-for-sale [Line Items]
Total Gross Unrealized Losses	6	8
Total Fair Value	22	54
Other
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	0	0
Less Than Twelve Months, Fair Value	0	0
More Than Twelve Months, Gross Unrealized Losses	8	9
More Than Twelve Months, Fair Value	55	54
Total Gross Unrealized Losses	8	9
Total Fair Value	$ 55	54
CLO
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses		0
Less Than Twelve Months, Fair Value		0
More Than Twelve Months, Gross Unrealized Losses		9
More Than Twelve Months, Fair Value		845
Total Gross Unrealized Losses		9
Total Fair Value		$ 845

Investment Securities - Allowan

Investment Securities - Allowance for Credit Losses, Available-for-Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1.4	$ 0
Recovery of Credit Losses	(0.1)	19.3
Charge-offs	0	(17.1)
Recoveries	0	0
Ending balance	$ 1.3	$ 2.2

Investment Securities - Allow_2

Investment Securities - Allowance for Credit Losses, Held-to-Maturity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 8
Ending balance	8
Tax-exempt
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	7.8	$ 5.2
Provision for Credit Losses	0.4	1.3
Charge-offs	0	0
Recoveries	0	0
Ending balance	$ 8.2	$ 6.5

Investment Securities - Investm

Investment Securities - Investment Securities by Credit Rating Type (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	$ 1,461	$ 1,429
Fair value	14,509	11,165
Investment securities - equity	130	126
AAA
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	1,073	1,178
Investment securities - equity	0	0
Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	12,148	7,371
Investment securities - equity	25	26
AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	391	1,661
Investment securities - equity	0	0
A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	467	528
Investment securities - equity	0	0
BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	271	239
Investment securities - equity	55	54
BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	53	85
Investment securities - equity	38	35
Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	1,461	1,429
Fair value	106	103
Investment securities - equity	12	11
Tax-exempt
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	1,278	1,243
Fair value	849	858
Tax-exempt \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	9	9
Tax-exempt \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	15	16
Tax-exempt \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	356	361
Tax-exempt \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	380	386
Tax-exempt \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	0	0
Tax-exempt \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	0	0
Tax-exempt \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	1,278	1,243
Fair value	89	86
Private label residential MBS
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	183	186
Fair value	1,091	1,117
Private label residential MBS \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	1,064	1,090
Private label residential MBS \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	0	0
Private label residential MBS \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	26	26
Private label residential MBS \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	0	0
Private label residential MBS \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	0	0
Private label residential MBS \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	1	1
Private label residential MBS \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	183	186
Fair value	0	0
U.S. Treasury securities
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	7,011	4,853
U.S. Treasury securities \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
U.S. Treasury securities \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	7,011	4,853
U.S. Treasury securities \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
U.S. Treasury securities \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
U.S. Treasury securities \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
U.S. Treasury securities \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
U.S. Treasury securities \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	4,536	1,972
Residential MBS issued by GSEs \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	4,536	1,972
Residential MBS issued by GSEs \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Residential MBS issued by GSEs \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	586	530
Commercial MBS issued by GSEs \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	586	530
Commercial MBS issued by GSEs \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Commercial MBS issued by GSEs \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Corporate debt securities
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	367	367
Corporate debt securities \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Corporate debt securities \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Corporate debt securities \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Corporate debt securities \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	76	76
Corporate debt securities \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	242	211
Corporate debt securities \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	49	80
Corporate debt securities \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Other
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	69	69
Other \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Other \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
Other \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	9	9
Other \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	11	11
Other \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	29	28
Other \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	3	4
Other \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	17	17
Preferred Stock
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	105	100
Preferred Stock \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
Preferred Stock \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
Preferred Stock \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
Preferred Stock \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
Preferred Stock \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	55	54
Preferred Stock \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	38	35
Preferred Stock \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	12	11
CRA investments
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	25	26
CRA investments \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
CRA investments \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	25	26
CRA investments \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
CRA investments \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
CRA investments \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
CRA investments \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	0	0
CRA investments \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	$ 0	0
CLO
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		1,399
CLO \| AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		79
CLO \| Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		0
CLO \| AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		1,265
CLO \| A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		55
CLO \| BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		0
CLO \| BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		0
CLO \| Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value		$ 0

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturities (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Securities held to maturity, Due in one year or less, Amortized Cost	$ 29
Securities held to maturity, After one year through five years, Amortized Cost	8
Securities held to maturity, After five years through ten years, Amortized Cost	86
Securities held to maturity, After ten years, Amortized Cost	1,155
Securities held to maturity, Mortgage backed securities, Amortized Cost	183
Amortized cost	1,461	$ 1,429
Held-to-maturity
Securities held to maturity, Due in one year or less, Estimated Fair Value	29
Securities held to maturity, After one year through five years, Estimated Fair Value	8
Securities held to maturity, After five years through ten years, Estimated Fair Value	74
Securities held to maturity, After ten years, Estimated Fair Value	998
Debt securities, held to maturity, Mortgage backed securities, Estimated Fair Value	144
Investment securities - HTM, fair value	1,253	1,251
Amortized Cost
Securities available for sale, Due in one year or less, Amortized Cost	6,540
Securities available for sale, After one year through five years, Amortized Cost	646
Securities available for sale, After five years through ten years, Amortized Cost	278
Securities available for sale, After ten years, Amortized Cost	967
Securities available for sale, Mortgage backed securities, Amortized Cost	6,820
Securities available for sale Total, Amortized Cost	15,251
Estimated Fair Value
Securities available for sale, Due in one year or less, Estimated Fair Value	6,535
Securities available for sale, After one year through five years, Estimated Fair Value	634
Securities available for sale, After five years through ten years, Estimated Fair Value	242
Securities available for sale, After ten years, Estimated Fair Value	885
Securities available for sale, Mortgage backed securities, Estimated Fair Value	6,213
Securities available for sale Total, Estimated Fair Value	$ 14,509	$ 11,165

Investment Securities - Gross G

Investment Securities - Gross Gains and (Losses) on Sales of Investments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investment securities - AFS
Gross gains	$ 0.9	$ 3.4
Gross losses	(1.8)	(15.9)
Net losses on AFS securities	$ (0.9)	$ (12.5)

Loans Held For Sale - Summary o

Loans Held For Sale - Summary of Loans HFS by Type (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	$ 1,841	$ 1,402
Total government-insured or guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	764	500
EBO
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	0	2
Non-EBO
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	764	498
Agency-conforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	1,067	899
Non-agency
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	$ 10	$ 3

Loans Held For Sale - Summary_2

Loans Held For Sale - Summary of Net Gain on Loan Purchase, Origination and Sale Activities on Residential Mortgage Loans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Receivables [Abstract]
Mortgage servicing rights capitalized upon sale of loans	$ 188.7	$ 142.4
Net proceeds from sale of loans	(160.7)	(107.4)
Provision for and change in estimate of liability for losses under representations and warranties, net	3.2	2.4
Change in fair value	(6.7)	6.6
Unrealized gain (loss) on derivatives	15.3	(22.2)
Realized gain on derivatives	(8.1)	(2.4)
Total change in fair value of derivatives	7.2	(24.6)
Net gain on residential mortgage loans HFS	31.7	19.4
Loan acquisition and origination fees	13.6	12
Net gain on loan origination and sale activities	$ 45.3	$ 31.4

Loans, Leases and Allowance f_3

Loans, Leases and Allowance for Credit Losses - Schedule of Held for Investment Loan Portfolio Composition of Loans, Leases and Allowance for Credit Losses (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	$ 50,700	$ 50,297
Less: allowance for credit losses	(340.3)	(336.7)	$ (304.7)	$ (309.7)
Net loans HFI	50,360	49,960
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	6,915	6,618
Less: allowance for credit losses	(7.3)	(5.8)	(6.6)	(8.4)
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,622	1,554
Less: allowance for credit losses	(13.9)	(14.7)	(18.4)	(15.9)
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	2,941	2,808
Less: allowance for credit losses	(48)	(42.1)	(36.4)	(30.8)
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	695	845
Less: allowance for credit losses	(1.2)	(1.3)	(3.3)	(6.4)
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	7,754	7,452
Less: allowance for credit losses	(67.1)	(81.4)	(51.1)	(85.9)
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,707	1,658
Less: allowance for credit losses	(6.2)	(6)	(8.6)	(7.1)
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	3,556	3,855
Less: allowance for credit losses	(35.8)	(33.4)	(47.7)	(46.9)
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	6,365	5,974
Less: allowance for credit losses	(104.7)	(96)	(66.4)	(47.4)
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	13,078	13,287
Less: allowance for credit losses	(22.1)	(23.1)	(31.7)	(30.4)
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,171	1,223
Less: allowance for credit losses	0	0	0	0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	4,746	4,862
Less: allowance for credit losses	(31.9)	(30.4)	(31.5)	(27.4)
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	150	161
Less: allowance for credit losses	$ (2.1)	$ (2.5)	$ (3)	$ (3.1)

Loans, Leases and Allowance f_4

Loans, Leases and Allowance for Credit Losses - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, unamortized loan fees	$ (102)		$ (108)
Financing receivable, unamortized premium	175		177
Loans Past Due 90 Days or More and Still Accruing	355		441
Interest income associated with loans on nonaccrual status	4.9	$ 0.8
Modified loans current with contractual payments	129		95
Modified loans on nonaccrual status	129		111
Amortized cost basis	108	26
Interest receivable	278		281
Loan purchases	389	511
Loan sales	148	915
Transfers of loans HFI to HFS, net of fair value loss adjustment (1)		6,900
Charge-off	1.4
Net gain on residential mortgage loans HFS	31.7	19.4
Gain (loss) on sale of loan	(4.9)	(140.8)
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans Past Due 90 Days or More and Still Accruing	349		399
Amortized cost basis	90	$ 57
Interest receivable	3		4
Residential - EBO \| Financial Asset, Current to 89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Modified loans	38		26
Residential - EBO \| Over 90 days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Modified loans	$ 12		$ 12

Loans, Leases and Allowance f_5

Loans, Leases and Allowance for Credit Losses - Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days Still Accruing Interest by Loan Class (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	$ 251	$ 151
Nonaccrual with an Allowance for Credit Loss	148	122
Total Nonaccrual	399	273
Loans Past Due 90 Days or More and Still Accruing	355	441
Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0	0
Nonaccrual with an Allowance for Credit Loss	5	6
Total Nonaccrual	5	6
Loans Past Due 90 Days or More and Still Accruing	0	0
Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	34	23
Nonaccrual with an Allowance for Credit Loss	28	10
Total Nonaccrual	62	33
Loans Past Due 90 Days or More and Still Accruing	0	0
Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	15	19
Nonaccrual with an Allowance for Credit Loss	20	34
Total Nonaccrual	35	53
Loans Past Due 90 Days or More and Still Accruing	6	0
CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	8	8
Nonaccrual with an Allowance for Credit Loss	2	1
Total Nonaccrual	10	9
Loans Past Due 90 Days or More and Still Accruing	0	0
Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with an Allowance for Credit Loss	12
Total Nonaccrual	12
Loans Past Due 90 Days or More and Still Accruing	0
Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	174	82
Nonaccrual with an Allowance for Credit Loss	1	1
Total Nonaccrual	175	83
Loans Past Due 90 Days or More and Still Accruing	0	0
Residential
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0	0
Nonaccrual with an Allowance for Credit Loss	79	70
Total Nonaccrual	79	70
Loans Past Due 90 Days or More and Still Accruing	0	0
Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0	0
Nonaccrual with an Allowance for Credit Loss	0	0
Total Nonaccrual	0	0
Loans Past Due 90 Days or More and Still Accruing	349	399
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	19	19
Nonaccrual with an Allowance for Credit Loss	1	0
Total Nonaccrual	20	19
Loans Past Due 90 Days or More and Still Accruing	0	$ 42
Other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	1
Nonaccrual with an Allowance for Credit Loss	0
Total Nonaccrual	1
Loans Past Due 90 Days or More and Still Accruing	$ 0

Loans, Leases and Allowance f_6

Loans, Leases and Allowance for Credit Losses - Contractual Aging of Loan Portfolio by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	$ 50,700		$ 50,297
Current fiscal year, writeoff	0	$ 1.8
Year before current fiscal year, writeoff	0	0.1
Two years before current fiscal year, writeoff	0.1	5.9
Three years before current fiscal year, writeoff	8.4	1.2
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	1.6	0.1
Revolving Loans Amortized Cost Basis, Writeoff	0.1	0.1
Charge-offs	10.2	9.2
Current fiscal year	1,654		7,504
Year before current fiscal year	6,985		12,434
Two years before current fiscal year	12,184		11,544
Three years before current fiscal year	11,176		2,876
Four years before current fiscal year	2,751		1,568
Five or more years before current fiscal year	3,762		2,523
Revolving Loans Amortized Cost Basis	12,234		11,829
Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	760		652
Current fiscal year	1		72
Year before current fiscal year	201		131
Two years before current fiscal year	126		238
Three years before current fiscal year	201		65
Four years before current fiscal year	65		72
Five or more years before current fiscal year	124		66
Revolving Loans Amortized Cost Basis	42		8
Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,915		6,618
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	17		582
Year before current fiscal year	550		323
Two years before current fiscal year	361		7
Three years before current fiscal year	7		289
Four years before current fiscal year	285		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	5,695		5,417
Warehouse lending \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,622		1,554
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	59		102
Year before current fiscal year	113		174
Two years before current fiscal year	207		176
Three years before current fiscal year	166		180
Four years before current fiscal year	179		74
Five or more years before current fiscal year	898		848
Revolving Loans Amortized Cost Basis	0		0
Municipal & nonprofit \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	5		6
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		6
Five or more years before current fiscal year	5		0
Revolving Loans Amortized Cost Basis	0		0
Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	2,941		2,808
Current fiscal year, writeoff	0	1.8
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	1.8
Current fiscal year	256		778
Year before current fiscal year	778		856
Two years before current fiscal year	730		219
Three years before current fiscal year	182		27
Four years before current fiscal year	30		66
Five or more years before current fiscal year	101		38
Revolving Loans Amortized Cost Basis	864		824
Tech & innovation \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	110		80
Current fiscal year	0		15
Year before current fiscal year	13		52
Two years before current fiscal year	50		1
Three years before current fiscal year	1		5
Four years before current fiscal year	5		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	41		7
Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	695		845
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	19		154
Year before current fiscal year	78		62
Two years before current fiscal year	92		21
Three years before current fiscal year	40		3
Four years before current fiscal year	3		1
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	463		604
Equity fund resources \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1		0
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	1		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	7,754		7,452
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0.1	5.9
Three years before current fiscal year, writeoff	2	1.2
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0.1	0.1
Revolving Loans Amortized Cost Basis, Writeoff	0.1	0.1
Charge-offs	2.3	7.3
Current fiscal year	571		1,701
Year before current fiscal year	1,621		1,480
Two years before current fiscal year	1,373		619
Three years before current fiscal year	551		187
Four years before current fiscal year	154		81
Five or more years before current fiscal year	241		196
Revolving Loans Amortized Cost Basis	3,243		3,188
Other commercial and industrial \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	167		92
Current fiscal year	1		1
Year before current fiscal year	88		25
Two years before current fiscal year	24		59
Three years before current fiscal year	48		2
Four years before current fiscal year	1		4
Five or more years before current fiscal year	4		0
Revolving Loans Amortized Cost Basis	1		1
CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,707		1,658
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	35		167
Year before current fiscal year	182		345
Two years before current fiscal year	380		326
Three years before current fiscal year	324		164
Four years before current fiscal year	156		133
Five or more years before current fiscal year	590		483
Revolving Loans Amortized Cost Basis	40		40
CRE - owner occupied \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	47		47
Current fiscal year	0		2
Year before current fiscal year	2		1
Two years before current fiscal year	1		4
Three years before current fiscal year	4		1
Four years before current fiscal year	1		1
Five or more years before current fiscal year	39		38
Revolving Loans Amortized Cost Basis	0		0
Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,556		3,855
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	1.4	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	1.5	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	2.9	0
Current fiscal year	97		651
Year before current fiscal year	597		1,543
Two years before current fiscal year	1,449		680
Three years before current fiscal year	561		95
Four years before current fiscal year	94		497
Five or more years before current fiscal year	626		257
Revolving Loans Amortized Cost Basis	132		132
Hotel franchise finance \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	75		147
Current fiscal year	0		24
Year before current fiscal year	0		8
Two years before current fiscal year	0		48
Three years before current fiscal year	20		0
Four years before current fiscal year	0		43
Five or more years before current fiscal year	55		24
Revolving Loans Amortized Cost Basis	0		0
Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,365		5,974
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	5	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	5	0
Current fiscal year	452		2,024
Year before current fiscal year	1,870		1,784
Two years before current fiscal year	1,911		863
Three years before current fiscal year	873		501
Four years before current fiscal year	454		208
Five or more years before current fiscal year	359		207
Revolving Loans Amortized Cost Basis	446		387
Other CRE - non-owner occupied \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	205		137
Current fiscal year	0		28
Year before current fiscal year	98		0
Two years before current fiscal year	0		93
Three years before current fiscal year	93		1
Four years before current fiscal year	1		14
Five or more years before current fiscal year	13		1
Revolving Loans Amortized Cost Basis	0		0
Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	13,078		13,287
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	78		325
Year before current fiscal year	278		3,599
Two years before current fiscal year	3,545		8,018
Three years before current fiscal year	7,925		823
Four years before current fiscal year	810		274
Five or more years before current fiscal year	465		209
Revolving Loans Amortized Cost Basis	23		20
Residential \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	79		70
Current fiscal year	0		1
Year before current fiscal year	0		26
Two years before current fiscal year	32		33
Three years before current fiscal year	35		4
Four years before current fiscal year	5		4
Five or more years before current fiscal year	7		2
Revolving Loans Amortized Cost Basis	0		0
Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,171		1,223
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	0		2
Year before current fiscal year	11		8
Two years before current fiscal year	17		227
Three years before current fiscal year	220		534
Four years before current fiscal year	513		231
Five or more years before current fiscal year	410		221
Revolving Loans Amortized Cost Basis	0		0
Residential - EBO \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	4,746		4,862
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Current fiscal year	68		1,014
Year before current fiscal year	906		2,250
Two years before current fiscal year	2,109		385
Three years before current fiscal year	325		62
Four years before current fiscal year	62		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	1,276		1,151
Construction and land development \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	70		72
Current fiscal year	0		1
Year before current fiscal year	0		19
Two years before current fiscal year	19		0
Three years before current fiscal year	0		52
Four years before current fiscal year	51		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	150		161
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0.1
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	$ 0.1
Current fiscal year	2		4
Year before current fiscal year	1		10
Two years before current fiscal year	10		3
Three years before current fiscal year	2		11
Four years before current fiscal year	11		3
Five or more years before current fiscal year	72		64
Revolving Loans Amortized Cost Basis	52		66
Other \| Classified
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1		1
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	1		1
Revolving Loans Amortized Cost Basis	0		0
Current
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	50,005		49,413
Current \| Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,915		6,618
Current \| Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,622		1,554
Current \| Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	2,941		2,808
Current \| Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	695		845
Current \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	7,743		7,439
Current \| CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,706		1,627
Current \| Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,556		3,824
Current \| Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,339		5,974
Current \| Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	13,002		13,199
Current \| Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	598		545
Current \| Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	4,741		4,820
Current \| Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	147		160
30-59 Days Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	243		270
30-59 Days Past Due \| Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
30-59 Days Past Due \| Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
30-59 Days Past Due \| Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
30-59 Days Past Due \| Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
30-59 Days Past Due \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	5		13
30-59 Days Past Due \| CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
30-59 Days Past Due \| Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		15
30-59 Days Past Due \| Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	26		0
30-59 Days Past Due \| Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	66		68
30-59 Days Past Due \| Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	138		173
30-59 Days Past Due \| Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	5		0
30-59 Days Past Due \| Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3		1
60-89 Days Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	97		173
60-89 Days Past Due \| Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1		31
60-89 Days Past Due \| Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		16
60-89 Days Past Due \| Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	10		20
60-89 Days Past Due \| Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	86		106
60-89 Days Past Due \| Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
60-89 Days Past Due \| Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	355		441
Over 90 days Past Due \| Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6		0
Over 90 days Past Due \| CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Over 90 days Past Due \| Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	349		399
Over 90 days Past Due \| Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		42
Over 90 days Past Due \| Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Total Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	695		884
Total Past Due \| Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Total Past Due \| Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Total Past Due \| Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Total Past Due \| Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		0
Total Past Due \| Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	11		13
Total Past Due \| CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1		31
Total Past Due \| Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0		31
Total Past Due \| Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	26		0
Total Past Due \| Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	76		88
Total Past Due \| Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	573		678
Total Past Due \| Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	5		42
Total Past Due \| Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	$ 3		$ 1

Loans, Leases and Allowance f_7

Loans, Leases and Allowance for Credit Losses - Credit Quality Indicators (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	$ 1,654		$ 7,504
Year before current fiscal year	6,985		12,434
Two years before current fiscal year	12,184		11,544
Three years before current fiscal year	11,176		2,876
Four years before current fiscal year	2,751		1,568
Five or more years before current fiscal year	3,762		2,523
Revolving Loans Amortized Cost Basis	12,234		11,829
Cumulative fair value hedging adjustment	(46)		19
Loans HFI, net of deferred fees and costs	50,700		50,297
Current fiscal year, writeoff	0	$ 1.8
Year before current fiscal year, writeoff	0	0.1
Two years before current fiscal year, writeoff	0.1	5.9
Three years before current fiscal year, writeoff	8.4	1.2
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	1.6	0.1
Revolving Loans Amortized Cost Basis, Writeoff	0.1	0.1
Charge-offs	10.2	9.2
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1,653		7,139
Year before current fiscal year	6,647		12,265
Two years before current fiscal year	11,941		11,211
Three years before current fiscal year	10,898		2,757
Four years before current fiscal year	2,635		1,433
Five or more years before current fiscal year	3,634		2,387
Revolving Loans Amortized Cost Basis	12,184		11,793
Loans HFI, net of deferred fees and costs	49,592		48,985
Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		293
Year before current fiscal year	137		38
Two years before current fiscal year	117		95
Three years before current fiscal year	77		54
Four years before current fiscal year	51		63
Five or more years before current fiscal year	4		70
Revolving Loans Amortized Cost Basis	8		28
Loans HFI, net of deferred fees and costs	394		641
Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		72
Year before current fiscal year	201		131
Two years before current fiscal year	126		238
Three years before current fiscal year	201		65
Four years before current fiscal year	65		72
Five or more years before current fiscal year	124		66
Revolving Loans Amortized Cost Basis	42		8
Loans HFI, net of deferred fees and costs	760		652
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	17		582
Year before current fiscal year	550		323
Two years before current fiscal year	361		7
Three years before current fiscal year	7		289
Four years before current fiscal year	285		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	5,695		5,417
Loans HFI, net of deferred fees and costs	6,915		6,618
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Warehouse lending \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	17		582
Year before current fiscal year	550		323
Two years before current fiscal year	338		7
Three years before current fiscal year	7		289
Four years before current fiscal year	285		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	5,695		5,391
Loans HFI, net of deferred fees and costs	6,892		6,592
Warehouse lending \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	23		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		26
Loans HFI, net of deferred fees and costs	23		26
Warehouse lending \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	0		0
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	59		102
Year before current fiscal year	113		174
Two years before current fiscal year	207		176
Three years before current fiscal year	166		180
Four years before current fiscal year	179		74
Five or more years before current fiscal year	898		848
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	1,622		1,554
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Municipal & nonprofit \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	59		102
Year before current fiscal year	113		167
Two years before current fiscal year	200		176
Three years before current fiscal year	166		169
Four years before current fiscal year	168		68
Five or more years before current fiscal year	893		848
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	1,599		1,530
Municipal & nonprofit \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		7
Two years before current fiscal year	7		0
Three years before current fiscal year	0		11
Four years before current fiscal year	11		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	18		18
Municipal & nonprofit \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		6
Five or more years before current fiscal year	5		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	5		6
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	256		778
Year before current fiscal year	778		856
Two years before current fiscal year	730		219
Three years before current fiscal year	182		27
Four years before current fiscal year	30		66
Five or more years before current fiscal year	101		38
Revolving Loans Amortized Cost Basis	864		824
Loans HFI, net of deferred fees and costs	2,941		2,808
Current fiscal year, writeoff	0	1.8
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	1.8
Tech & innovation \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	256		758
Year before current fiscal year	756		774
Two years before current fiscal year	650		206
Three years before current fiscal year	171		22
Four years before current fiscal year	25		66
Five or more years before current fiscal year	101		38
Revolving Loans Amortized Cost Basis	815		816
Loans HFI, net of deferred fees and costs	2,774		2,680
Tech & innovation \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		5
Year before current fiscal year	9		30
Two years before current fiscal year	30		12
Three years before current fiscal year	10		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	8		1
Loans HFI, net of deferred fees and costs	57		48
Tech & innovation \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		15
Year before current fiscal year	13		52
Two years before current fiscal year	50		1
Three years before current fiscal year	1		5
Four years before current fiscal year	5		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	41		7
Loans HFI, net of deferred fees and costs	110		80
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	19		154
Year before current fiscal year	78		62
Two years before current fiscal year	92		21
Three years before current fiscal year	40		3
Four years before current fiscal year	3		1
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	463		604
Loans HFI, net of deferred fees and costs	695		845
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Equity fund resources \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	19		154
Year before current fiscal year	78		62
Two years before current fiscal year	92		21
Three years before current fiscal year	40		3
Four years before current fiscal year	2		1
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	463		604
Loans HFI, net of deferred fees and costs	694		845
Equity fund resources \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	0		0
Equity fund resources \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	1		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	1		0
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	571		1,701
Year before current fiscal year	1,621		1,480
Two years before current fiscal year	1,373		619
Three years before current fiscal year	551		187
Four years before current fiscal year	154		81
Five or more years before current fiscal year	241		196
Revolving Loans Amortized Cost Basis	3,243		3,188
Loans HFI, net of deferred fees and costs	7,754		7,452
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0.1	5.9
Three years before current fiscal year, writeoff	2	1.2
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0.1	0.1
Revolving Loans Amortized Cost Basis, Writeoff	0.1	0.1
Charge-offs	2.3	7.3
Other commercial and industrial \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	570		1,610
Year before current fiscal year	1,533		1,454
Two years before current fiscal year	1,348		559
Three years before current fiscal year	503		185
Four years before current fiscal year	153		77
Five or more years before current fiscal year	236		196
Revolving Loans Amortized Cost Basis	3,242		3,186
Loans HFI, net of deferred fees and costs	7,585		7,267
Other commercial and industrial \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		90
Year before current fiscal year	0		1
Two years before current fiscal year	1		1
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	1		0
Revolving Loans Amortized Cost Basis	0		1
Loans HFI, net of deferred fees and costs	2		93
Other commercial and industrial \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		1
Year before current fiscal year	88		25
Two years before current fiscal year	24		59
Three years before current fiscal year	48		2
Four years before current fiscal year	1		4
Five or more years before current fiscal year	4		0
Revolving Loans Amortized Cost Basis	1		1
Loans HFI, net of deferred fees and costs	167		92
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	35		167
Year before current fiscal year	182		345
Two years before current fiscal year	380		326
Three years before current fiscal year	324		164
Four years before current fiscal year	156		133
Five or more years before current fiscal year	590		483
Revolving Loans Amortized Cost Basis	40		40
Loans HFI, net of deferred fees and costs	1,707		1,658
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
CRE - owner occupied \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	35		165
Year before current fiscal year	180		344
Two years before current fiscal year	377		322
Three years before current fiscal year	320		163
Four years before current fiscal year	155		132
Five or more years before current fiscal year	551		444
Revolving Loans Amortized Cost Basis	40		40
Loans HFI, net of deferred fees and costs	1,658		1,610
CRE - owner occupied \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	2		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		1
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	2		1
CRE - owner occupied \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		2
Year before current fiscal year	2		1
Two years before current fiscal year	1		4
Three years before current fiscal year	4		1
Four years before current fiscal year	1		1
Five or more years before current fiscal year	39		38
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	47		47
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	97		651
Year before current fiscal year	597		1,543
Two years before current fiscal year	1,449		680
Three years before current fiscal year	561		95
Four years before current fiscal year	94		497
Five or more years before current fiscal year	626		257
Revolving Loans Amortized Cost Basis	132		132
Loans HFI, net of deferred fees and costs	3,556		3,855
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	1.4	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	1.5	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	2.9	0
Hotel franchise finance \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	97		593
Year before current fiscal year	563		1,535
Two years before current fiscal year	1,449		566
Three years before current fiscal year	474		95
Four years before current fiscal year	94		419
Five or more years before current fiscal year	571		165
Revolving Loans Amortized Cost Basis	132		132
Loans HFI, net of deferred fees and costs	3,380		3,505
Hotel franchise finance \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		34
Year before current fiscal year	34		0
Two years before current fiscal year	0		66
Three years before current fiscal year	67		0
Four years before current fiscal year	0		35
Five or more years before current fiscal year	0		68
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	101		203
Hotel franchise finance \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		24
Year before current fiscal year	0		8
Two years before current fiscal year	0		48
Three years before current fiscal year	20		0
Four years before current fiscal year	0		43
Five or more years before current fiscal year	55		24
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	75		147
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	452		2,024
Year before current fiscal year	1,870		1,784
Two years before current fiscal year	1,911		863
Three years before current fiscal year	873		501
Four years before current fiscal year	454		208
Five or more years before current fiscal year	359		207
Revolving Loans Amortized Cost Basis	446		387
Loans HFI, net of deferred fees and costs	6,365		5,974
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	5	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	5	0
Other CRE - non-owner occupied \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	452		1,832
Year before current fiscal year	1,678		1,784
Two years before current fiscal year	1,862		754
Three years before current fiscal year	780		457
Four years before current fiscal year	413		166
Five or more years before current fiscal year	346		206
Revolving Loans Amortized Cost Basis	446		387
Loans HFI, net of deferred fees and costs	5,977		5,586
Other CRE - non-owner occupied \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		164
Year before current fiscal year	94		0
Two years before current fiscal year	49		16
Three years before current fiscal year	0		43
Four years before current fiscal year	40		28
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	183		251
Other CRE - non-owner occupied \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		28
Year before current fiscal year	98		0
Two years before current fiscal year	0		93
Three years before current fiscal year	93		1
Four years before current fiscal year	1		14
Five or more years before current fiscal year	13		1
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	205		137
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	78		325
Year before current fiscal year	278		3,599
Two years before current fiscal year	3,545		8,018
Three years before current fiscal year	7,925		823
Four years before current fiscal year	810		274
Five or more years before current fiscal year	465		209
Revolving Loans Amortized Cost Basis	23		20
Cumulative fair value hedging adjustment	(46)		19
Loans HFI, net of deferred fees and costs	13,078		13,287
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Residential \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	78		324
Year before current fiscal year	278		3,573
Two years before current fiscal year	3,513		7,985
Three years before current fiscal year	7,890		819
Four years before current fiscal year	805		270
Five or more years before current fiscal year	458		207
Revolving Loans Amortized Cost Basis	23		20
Loans HFI, net of deferred fees and costs	13,045		13,198
Residential \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	0		0
Residential \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		1
Year before current fiscal year	0		26
Two years before current fiscal year	32		33
Three years before current fiscal year	35		4
Four years before current fiscal year	5		4
Five or more years before current fiscal year	7		2
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	79		70
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		2
Year before current fiscal year	11		8
Two years before current fiscal year	17		227
Three years before current fiscal year	220		534
Four years before current fiscal year	513		231
Five or more years before current fiscal year	410		221
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	1,171		1,223
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Residential - EBO \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		2
Year before current fiscal year	11		8
Two years before current fiscal year	17		227
Three years before current fiscal year	220		534
Four years before current fiscal year	513		231
Five or more years before current fiscal year	410		221
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	1,171		1,223
Residential - EBO \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	0		0
Residential - EBO \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	0		0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	68		1,014
Year before current fiscal year	906		2,250
Two years before current fiscal year	2,109		385
Three years before current fiscal year	325		62
Four years before current fiscal year	62		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	1,276		1,151
Loans HFI, net of deferred fees and costs	4,746		4,862
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	0
Construction and land development \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	68		1,013
Year before current fiscal year	906		2,231
Two years before current fiscal year	2,085		385
Three years before current fiscal year	325		10
Four years before current fiscal year	11		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	1,276		1,151
Loans HFI, net of deferred fees and costs	4,671		4,790
Construction and land development \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	5		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	5		0
Construction and land development \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		1
Year before current fiscal year	0		19
Two years before current fiscal year	19		0
Three years before current fiscal year	0		52
Four years before current fiscal year	51		0
Five or more years before current fiscal year	0		0
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	70		72
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	2		4
Year before current fiscal year	1		10
Two years before current fiscal year	10		3
Three years before current fiscal year	2		11
Four years before current fiscal year	11		3
Five or more years before current fiscal year	72		64
Revolving Loans Amortized Cost Basis	52		66
Loans HFI, net of deferred fees and costs	150		161
Current fiscal year, writeoff	0	0
Year before current fiscal year, writeoff	0	0.1
Two years before current fiscal year, writeoff	0	0
Three years before current fiscal year, writeoff	0	0
Four years before current fiscal year, writeoff	0	0
Five years before current fiscal year, writeoff	0	0
Revolving Loans Amortized Cost Basis, Writeoff	0	0
Charge-offs	0	$ 0.1
Other \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	2		4
Year before current fiscal year	1		10
Two years before current fiscal year	10		3
Three years before current fiscal year	2		11
Four years before current fiscal year	11		3
Five or more years before current fiscal year	68		62
Revolving Loans Amortized Cost Basis	52		66
Loans HFI, net of deferred fees and costs	146		159
Other \| Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	3		1
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	3		1
Other \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0
Year before current fiscal year	0		0
Two years before current fiscal year	0		0
Three years before current fiscal year	0		0
Four years before current fiscal year	0		0
Five or more years before current fiscal year	1		1
Revolving Loans Amortized Cost Basis	0		0
Loans HFI, net of deferred fees and costs	$ 1		$ 1

Loans, Leases and Allowance f_8

Loans, Leases and Allowance for Credit Losses - Amortized Cost Basis of Loans Modified (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 108	$ 26
% of Total Class of Financing Receivable	0.20%	0.10%
Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 2
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	78	18
Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	30	6
Tech & innovation
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 30	$ 7
% of Total Class of Financing Receivable	1%	0.30%
Tech & innovation \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 2
Tech & innovation \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0
Tech & innovation \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	30	5
Other commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 8
% of Total Class of Financing Receivable	0.10%
Other commercial and industrial \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Other commercial and industrial \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	8
Other commercial and industrial \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0
CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 31
% of Total Class of Financing Receivable	1.80%
CRE - owner occupied \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
CRE - owner occupied \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	31
CRE - owner occupied \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 39
% of Total Class of Financing Receivable	0.80%
Construction and land development \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Construction and land development \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	39
Construction and land development \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Hotel franchise finance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 18
% of Total Class of Financing Receivable		0.50%
Hotel franchise finance \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0
Hotel franchise finance \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		18
Hotel franchise finance \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0
Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 1
% of Total Class of Financing Receivable		0%
Residential \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0
Residential \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0
Residential \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 1

Loans, Leases and Allowance f_9

Loans, Leases and Allowance for Credit Losses - Troubled Debt Restructurings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 108	$ 26
% of Total Class of Financing Receivable	0.20%	0.10%
Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 2
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	78	18
Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	30	6
Other commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 8
% of Total Class of Financing Receivable	0.10%
Other commercial and industrial \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Other commercial and industrial \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	8
Other commercial and industrial \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0
CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 31
% of Total Class of Financing Receivable	1.80%
CRE - owner occupied \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
CRE - owner occupied \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	31
CRE - owner occupied \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 39
% of Total Class of Financing Receivable	0.80%
Construction and land development \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Construction and land development \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	39
Construction and land development \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0
Hotel franchise finance
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 18
% of Total Class of Financing Receivable		0.50%
Hotel franchise finance \| Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0
Hotel franchise finance \| Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		18
Hotel franchise finance \| Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0

Loans, Leases and Allowance _10

Loans, Leases and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	$ 50,360	$ 49,960
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	444	389
Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	378	354
Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	66	35
Municipal & nonprofit \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	5	6
Municipal & nonprofit \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Municipal & nonprofit \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	5	6
Tech & innovation \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	35	0
Tech & innovation \| Real Estate Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Tech & innovation \| Other Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	35	0
Other commercial and industrial \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	26	29
Other commercial and industrial \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Other commercial and industrial \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	26	29
CRE - owner occupied \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	42	43
CRE - owner occupied \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	42	43
CRE - owner occupied \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Hotel franchise finance \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	63	104
Hotel franchise finance \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	63	104
Hotel franchise finance \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Other CRE - non-owner occupied \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	204	136
Other CRE - non-owner occupied \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	204	136
Other CRE - non-owner occupied \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	0	0
Construction and land development \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	69	71
Construction and land development \| Real Estate Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	69	71
Construction and land development \| Other Collateral \| Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	$ 0	$ 0

Loans, Leases and Allowance _11

Loans, Leases and Allowance for Credit Losses - Allowances for Credit Losses (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 336.7	$ 309.7
Provision for (Recovery of) Credit Losses	13.4	1
Charge-offs	10.2	9.2
Recoveries	(0.4)	(3.2)
Ending balance	340.3	304.7
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Balance, beginning of period	31.6	47
Provision for (Recovery of) credit losses	1.5	(2.2)
Balance, end of period	33.1	44.8
Warehouse lending
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5.8	8.4
Provision for (Recovery of) Credit Losses	1.5	(1.8)
Charge-offs	0	0
Recoveries	0	0
Ending balance	7.3	6.6
Municipal & nonprofit
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14.7	15.9
Provision for (Recovery of) Credit Losses	(0.8)	2.5
Charge-offs	0	0
Recoveries	0	0
Ending balance	13.9	18.4
Tech & innovation
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	42.1	30.8
Provision for (Recovery of) Credit Losses	5.9	7.4
Charge-offs	0	1.8
Recoveries	0	0
Ending balance	48	36.4
Equity fund resources
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1.3	6.4
Provision for (Recovery of) Credit Losses	(0.1)	(3.1)
Charge-offs	0	0
Recoveries	0	0
Ending balance	1.2	3.3
Other commercial and industrial
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	81.4	85.9
Provision for (Recovery of) Credit Losses	(12.4)	(30.7)
Charge-offs	2.3	7.3
Recoveries	(0.4)	(3.2)
Ending balance	67.1	51.1
CRE - owner occupied
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	6	7.1
Provision for (Recovery of) Credit Losses	0.2	1.5
Charge-offs	0	0
Recoveries	0	0
Ending balance	6.2	8.6
Hotel franchise finance
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	33.4	46.9
Provision for (Recovery of) Credit Losses	5.3	0.8
Charge-offs	2.9	0
Recoveries	0	0
Ending balance	35.8	47.7
Other CRE - non-owner occupied
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	96	47.4
Provision for (Recovery of) Credit Losses	13.7	19
Charge-offs	5	0
Recoveries	0	0
Ending balance	104.7	66.4
Residential
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	23.1	30.4
Provision for (Recovery of) Credit Losses	(1)	1.3
Charge-offs	0	0
Recoveries	0	0
Ending balance	22.1	31.7
Residential - EBO
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0
Provision for (Recovery of) Credit Losses	0	0
Charge-offs	0	0
Recoveries	0	0
Ending balance	0	0
Construction and land development
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	30.4	27.4
Provision for (Recovery of) Credit Losses	1.5	4.1
Charge-offs	0	0
Recoveries	0	0
Ending balance	31.9	31.5
Other
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2.5	3.1
Provision for (Recovery of) Credit Losses	(0.4)	0
Charge-offs	0	0.1
Recoveries	0	0
Ending balance	$ 2.1	$ 3

Loans, Leases and Allowance _12

Loans, Leases and Allowance for Credit Losses - Disaggregation of the Company's ACL on Funded Loans and Loan Balances (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	$ 50,030	$ 49,723
Individually Evaluated for Credit Loss	670	574
Loans HFI, net of deferred fees and costs	50,700	50,297
Collectively Evaluated for Credit Loss	327.4	315.1
Individually Evaluated for Credit Loss	12.9	21.6
Total	340.3	336.7	$ 304.7	$ 309.7
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	6,915	6,618
Individually Evaluated for Credit Loss	0	0
Loans HFI, net of deferred fees and costs	6,915	6,618
Collectively Evaluated for Credit Loss	7.3	5.8
Individually Evaluated for Credit Loss	0	0
Total	7.3	5.8	6.6	8.4
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,617	1,548
Individually Evaluated for Credit Loss	5	6
Loans HFI, net of deferred fees and costs	1,622	1,554
Collectively Evaluated for Credit Loss	13.2	13.7
Individually Evaluated for Credit Loss	0.7	1
Total	13.9	14.7	18.4	15.9
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	2,832	2,729
Individually Evaluated for Credit Loss	109	79
Loans HFI, net of deferred fees and costs	2,941	2,808
Collectively Evaluated for Credit Loss	40.8	38.3
Individually Evaluated for Credit Loss	7.2	3.8
Total	48	42.1	36.4	30.8
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	695	845
Individually Evaluated for Credit Loss	0	0
Loans HFI, net of deferred fees and costs	695	845
Collectively Evaluated for Credit Loss	1.2	1.3
Individually Evaluated for Credit Loss	0	0
Total	1.2	1.3	3.3	6.4
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	7,591	7,362
Individually Evaluated for Credit Loss	163	90
Loans HFI, net of deferred fees and costs	7,754	7,452
Collectively Evaluated for Credit Loss	62.5	64.6
Individually Evaluated for Credit Loss	4.6	16.8
Total	67.1	81.4	51.1	85.9
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,664	1,613
Individually Evaluated for Credit Loss	43	45
Loans HFI, net of deferred fees and costs	1,707	1,658
Collectively Evaluated for Credit Loss	6.2	6
Individually Evaluated for Credit Loss	0	0
Total	6.2	6	8.6	7.1
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	3,481	3,708
Individually Evaluated for Credit Loss	75	147
Loans HFI, net of deferred fees and costs	3,556	3,855
Collectively Evaluated for Credit Loss	35.4	33.4
Individually Evaluated for Credit Loss	0.4	0
Total	35.8	33.4	47.7	46.9
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	6,161	5,838
Individually Evaluated for Credit Loss	204	136
Loans HFI, net of deferred fees and costs	6,365	5,974
Collectively Evaluated for Credit Loss	104.7	96
Individually Evaluated for Credit Loss	0	0
Total	104.7	96	66.4	47.4
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	13,078	13,287
Individually Evaluated for Credit Loss	0	0
Loans HFI, net of deferred fees and costs	13,078	13,287
Collectively Evaluated for Credit Loss	22.1	23.1
Individually Evaluated for Credit Loss	0	0
Total	22.1	23.1	31.7	30.4
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,171	1,223
Individually Evaluated for Credit Loss	0	0
Loans HFI, net of deferred fees and costs	1,171	1,223
Collectively Evaluated for Credit Loss	0	0
Individually Evaluated for Credit Loss	0	0
Total	0	0	0	0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	4,676	4,791
Individually Evaluated for Credit Loss	70	71
Loans HFI, net of deferred fees and costs	4,746	4,862
Collectively Evaluated for Credit Loss	31.9	30.4
Individually Evaluated for Credit Loss	0	0
Total	31.9	30.4	31.5	27.4
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	149	161
Individually Evaluated for Credit Loss	1	0
Loans HFI, net of deferred fees and costs	150	161
Collectively Evaluated for Credit Loss	2.1	2.5
Individually Evaluated for Credit Loss	0	0
Total	$ 2.1	$ 2.5	$ 3	$ 3.1

Mortgage Servicing Rights - Cha

Mortgage Servicing Rights - Changes in Fair Value of the Company's MSR Portfolio (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 1,124	$ 1,148
Mortgage servicing rights capitalized upon sale of mortgage loans	189	142
Carrying value of MSRs sold	(156)	(350)
Change in fair value	60	(8)
Mark to market adjustments	0	3
Realization of cash flows	(39)	(25)
Balance, end of period	1,178	910
Unpaid principal balance of mortgage loans serviced for others	$ 65,620	$ 58,466

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
MSR UPB of underlying loans	$ 10,800	$ 19,500
Remaining receivable balance	34		$ 41
Ancillary income associated with the Company's MSR portfolio	67	62.9
Servicing advances, net	67		$ 87
Servicing Contracts
Servicing Assets at Fair Value [Line Items]
Disposals of servicing assets	$ 156	$ 350

Mortgage Servicing Rights - Eff

Mortgage Servicing Rights - Effect of Hypothetical Changes in the Fair Value of MSRs (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Transfers and Servicing [Abstract]
Fair value of mortgage servicing rights	$ 1,178	$ 1,124	$ 910	$ 1,148
Adverse change	(65)
Favorable change	57
Increase	(23)
Decrease	24
Increase	(33)
Decrease	36
Increase	(14)
Decrease	$ 14

Deposits - Deposits by Type (De

Deposits - Deposits by Type (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Non-interest-bearing demand	$ 18,399	$ 14,520
Interest-bearing transaction accounts	16,965	15,916
Savings and money market accounts	16,194	14,791
Time certificates of deposit ($250,000 or more)	1,683	1,478
Other time deposits	8,987	8,628
Total deposits	62,228	55,333
Retail brokered time deposits over $250,000	$ 5,700	$ 5,800

Deposits - Summary of Contractu

Deposits - Summary of Contractual Maturities for Time Deposits (Details) $ in Millions	Mar. 31, 2024 USD ($)
Other Liabilities Disclosure [Abstract]
2024	$ 8,311
2025	2,328
2026	26
2027	3
2028	1
Thereafter	1
Total	$ 10,670

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Wholesale deposits	$ 6,500		$ 6,600
Reciprocal deposits	14,500		13,300
Earnings credits or referral fees	22,200		$ 17,800
Deposits costs, deposits with earnings credits	$ 131.2	$ 85.6

Other Borrowings - Company's Bo

Other Borrowings - Company's Borrowings (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Debt [Line Items]
Federal funds purchased	$ 0	$ 175
FHLB advances	5,750	6,200
Customer repurchase agreements	8	382
Short-term Debt	5,780	6,784
Credit linked notes, net	441	446
Long-term Debt	441	446
Other borrowings	6,221	7,230
Secured borrowings
Debt [Line Items]
Secured borrowings	$ 22	$ 27

Other Borrowings - Additional I

Other Borrowings - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt [Line Items]
Weighted average rate on FHLB advances	5.66%		5.67%
Customer repurchase agreements	$ 8		$ 382
Gain on extinguishment of debt	0	$ 12.7
Credit Linked Notes
Debt [Line Items]
Debt Issuance Costs	7		8
Principal	$ 455		460
Fed Funds Effective Rate Overnight Index Swap Rate \| Minimum
Debt [Line Items]
Period of basis point spread	0.10%
Fed Funds Effective Rate Overnight Index Swap Rate \| Maximum
Debt [Line Items]
Period of basis point spread	0.20%
Customer Repurchase Agreements
Debt [Line Items]
Customer repurchase agreements	$ 8		6
Federal Home Loan Bank Advances
Debt [Line Items]
Additional available credit with the entity	8,000		6,100
Revolving Credit Facility
Debt [Line Items]
Secured borrowing credit line	839
Warehouse Agreement Borrowings
Debt [Line Items]
Additional available credit with the entity	2,300
Warehouse borrowings	$ 0		$ 376
Weighted average borrowing rate			6.72%
Secured Debt
Debt [Line Items]
Weighted average borrowing rate	6.58%		6.10%

Other Borrowings - Outstanding

Other Borrowings - Outstanding Credit Linked Noted Issuances (Details) - Credit Linked Notes - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Debt [Line Items]
Principal	$ 455	$ 460
Debt Issuance Costs	7	8
Credit Linked Notes Maturing October 2052
Debt [Line Items]
Principal	89	90
Debt Issuance Costs	2	2
Reference pool balance	$ 1,800	$ 1,800
Credit Linked Notes Maturing October 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt [Line Items]
Period of basis point spread	7.80%	7.80%
Weighted average borrowing rate	7.80%
Credit Linked Notes Maturing October 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt [Line Items]
Period of basis point spread	2.25%
Credit Linked Notes Maturing October 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum
Debt [Line Items]
Period of basis point spread	11%
Credit Linked Notes Maturing April 2052
Debt [Line Items]
Principal	$ 177	$ 179
Debt Issuance Costs	3	3
Reference pool balance	$ 3,500	$ 3,600
Credit Linked Notes Maturing April 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt [Line Items]
Period of basis point spread	6%	6%
Weighted average borrowing rate	6%
Credit Linked Notes Maturing April 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt [Line Items]
Period of basis point spread	2.25%
Credit Linked Notes Maturing April 2052 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum
Debt [Line Items]
Period of basis point spread	15%
Credit Linked Notes Maturing July 2059
Debt [Line Items]
Principal	$ 189	$ 191
Debt Issuance Costs	2	3
Reference pool balance	$ 3,700	$ 3,800
Credit Linked Notes Maturing July 2059 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt [Line Items]
Period of basis point spread	4.67%	4.67%
Weighted average borrowing rate	4.67%
Credit Linked Notes Maturing July 2059 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum
Debt [Line Items]
Period of basis point spread	3.15%
Credit Linked Notes Maturing July 2059 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum
Debt [Line Items]
Period of basis point spread	8.50%

Qualifying Debt - Subordinated

Qualifying Debt - Subordinated Debt Issuances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Subordinated Debt
Debt Instrument [Line Items]
Principal	$ 825	$ 825
Debt Issuance Costs	$ 7	$ 7
Subordinated Debentures Maturing June 2031
Debt Instrument [Line Items]
Interest rate	3%
Subordinated Debentures Maturing June 2031 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Period of basis point spread	2.25%
Subordinated Debentures Maturing June 2031 \| Subordinated Debt
Debt Instrument [Line Items]
Interest rate	3%	3%
Principal	$ 600	$ 600
Debt Issuance Costs	$ 6	$ 6
Subordinated Debentures Maturing June 2030
Debt Instrument [Line Items]
Interest rate	5.25%
Subordinated Debentures Maturing June 2030 \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Period of basis point spread	5.12%
Subordinated Debentures Maturing June 2030 \| Subordinated Debt
Debt Instrument [Line Items]
Interest rate	5.25%	5.25%
Principal	$ 225	$ 225
Debt Issuance Costs	$ 1	$ 1

Qualifying Debt (Details)

Qualifying Debt (Details) $ in Millions	3 Months Ended
Qualifying Debt (Details) $ in Millions	Mar. 31, 2024 USD ($) Trust	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Subordinated debt issuances	$ 818	$ 818
Number of statutory business trusts \| Trust	8
Junior subordinated debt	$ 78	$ 77
Junior Subordinated Debt
Debt Instrument [Line Items]
Weighted average interest rate	7.90%	7.93%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares outstanding (shares)	12,000,000			12,000,000
Preferred stock dividend rate	4.25%
Preferred stock, par value (dollars per share)	$ 0.0001			$ 0.0001
Preferred stock, liquidation value (dollars per share)	25			$ 25
Cash dividend (dollars per share)	$ 0.27		$ 0.27
Dividends, preferred stock	$ 3.2		$ 3.2
Dividends paid	$ 40.7		$ 39.4
Cash dividend per share (dollars per share)	$ 0.37	$ 0.36	$ 0.36
Shares withheld (shares)	122,597		143,404
Weighted average price of treasury shares (dollars per share)	$ 61.55		$ 74.70
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, liquidation value (dollars per share)	$ 10,000
ATM Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issuance, net (shares)	0		0
Remaining shares available (shares)	1,107,769
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate grant date fair value	$ 44.8		$ 44.5
Stock-based compensation expense	$ 12.1		8.5
Restricted Stock \| Share-Based Payment Arrangement, Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock \| Share-Based Payment Arrangement, Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	6 months
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock-based compensation expense	$ 1		(2.5)
Performance Shares \| Grant year 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Vesting percentage	168%
Vested (shares)	129,942
Performance Shares \| Grant year 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Vesting percentage	180%
Vested (shares)	157,784
Cash Settled Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock-based compensation expense	$ 0.1		0
Retained Earnings
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, preferred stock	3.2		3.2
Dividends paid	$ 40.7		$ 39.4
Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares outstanding (shares)	12,000,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (513)
Net other comprehensive (loss) income	(44.7)	$ 69.5
Ending balance	(558)
Unrealized holding gains (losses) on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(516.6)	(663.7)
Other comprehensive income before reclassifications	(44.9)	60.1
Amounts reclassified from accumulated other comprehensive income	0.7	9.3
Net other comprehensive (loss) income	(44.2)	69.4
Ending balance	(560.8)	(594.3)
Unrealized holding gains (losses) on junior subordinated debt
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2.8	3
Other comprehensive income before reclassifications	(0.5)	(1.1)
Amounts reclassified from accumulated other comprehensive income	0	0
Net other comprehensive (loss) income	(0.5)	(1.1)
Ending balance	2.3	1.9
Impairment loss on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1.2	0
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	0	1.2
Net other comprehensive (loss) income	0	1.2
Ending balance	1.2	1.2
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(512.9)	(661)
Other comprehensive income before reclassifications	(45.4)	59
Amounts reclassified from accumulated other comprehensive income	0.7	10.5
Net other comprehensive (loss) income	(44.7)	69.5
Ending balance	(557.6)	(591.5)
Unrealized holding losses on SERP
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(0.3)	(0.3)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive income	0	0
Net other comprehensive (loss) income	0	0
Ending balance	$ (0.3)	$ (0.3)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income	$ 0.2	$ 3.2
Amount reclassified from accumulated other comprehensive income	$ (0.7)	$ (9.3)

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative [Line Items]
Cumulative basis adjustment including carrying value of hedged items	$ 66		$ 6
Collateral posted by this counterparty	146	$ 33	$ 216
Designated as Hedging Instrument
Derivative [Line Items]
Cumulative basis adjustment including carrying value of hedged items	(6)
Cumulative basis adjustment	(46)
Interest income related to amortization of cumulative basis adjustment	$ 3	$ 3

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Derivative Assets at Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Value of Hedged Assets/(Liabilities)	$ 3,857	$ 3,875
Cumulative basis adjustment including carrying value of hedged items	66	6
Loans HFI, net of deferred fees and costs	50,700	$ 50,297
Prepayable Fixed Rate Loans
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loans HFI, net of deferred fees and costs	6,600
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative basis adjustment including carrying value of hedged items	(6)
Portfolio layer method derivative instruments	$ 3,500

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Derivative Instruments, Gain (Loss) (Details) - Interest income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Swaps	$ 72	$ (4.3)
Gain/(Loss) on Hedged Item	$ (72.5)	$ 4.3

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Schedule of Fair Value of the Company's Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 30,087	$ 29,912	$ 31,056
Derivative Assets	241	260	52
Derivative Liabilities	40	78	43
Derivative Assets	205	271	66
Derivative Liabilities	61	67	63
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,884	3,895	470
Derivative Assets	67	19	14
Derivative Liabilities	0	24	1
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	30,087	29,912	31,056
Derivative Assets	66	69	61
Derivative Liabilities	53	76	77
Notional Amount, Margin
Derivative Assets, Margin	139	202	5
Derivative Liabilities, Margin	8	(9)	(14)
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	84	31	14
Derivative Liabilities	2	31	1
Interest rate contracts \| Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,884	3,895	470
Derivative Assets	67	19	14
Derivative Liabilities	0	24	1
Interest rate contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	3,890	3,628	1,983
Derivative Assets	20	19	5
Derivative Liabilities	21	20	6
Foreign currency contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	1	0	0
Derivative Liabilities	1	1	0
Foreign currency contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	165	135	189
Derivative Assets	1	1	2
Derivative Liabilities	1	1	1
Forward purchase contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	13	26	30
Derivative Liabilities	2	0	4
Forward purchase contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	5,590	5,544	7,814
Derivative Assets	13	26	34
Derivative Liabilities	2	0	5
Forward sales contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	4	1	3
Derivative Liabilities	27	55	52
Forward sales contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	8,380	7,626	9,702
Derivative Assets	4	1	3
Derivative Liabilities	28	55	64
Futures purchase contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	124	124	0
Derivative Assets	0	0	0
Derivative Liabilities	0	0	0
Futures sales contracts \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	9,996	10,906	9,710
Derivative Assets	0	0	0
Derivative Liabilities	0	0	0
Interest rate lock commitments \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	1,810	1,822	1,557
Derivative Assets	10	18	14
Derivative Liabilities	1	0	1
Risk participation agreements \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	75	72	51
Derivative Assets	0	0	0
Derivative Liabilities	0	0	0
Equity warrants \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	57	55	50
Derivative Assets	18	4	3
Derivative Liabilities	$ 0	$ 0	$ 0

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities - Fair Value After Master Netting Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 241	$ 260	$ 52
Derivative asset, subject to master netting arrangement, after offset	208	193	14
Derivative asset, collateral, obligation to return cash, offset	139	202	5
Derivative asset, subject to master netting arrangement, liability offset	(33)	(67)	(38)
Derivative liability, fair value	(40)	(78)	(43)
Derivative liability, subject to master netting arrangement, after offset	(7)	(11)	(5)
Derivative liability, collateral, right to reclaim cash, offset	(8)	9	14
Derivative liability, subject to master netting arrangement, asset offset	33	67	38
Derivative asset, not subject to master netting arrangement	31	30	28
Derivative liability, not subject to master netting arrangement	(21)	(13)	(21)
Derivative asset, fair value, gross asset including not subject to master netting arrangement	272	290	80
Derivative asset, fair value, offset against collateral, net of not subject to master netting arrangement	239	223	42
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(61)	(91)	(64)
Derivative liability, fair value, offset against collateral, net of not subject to master netting arrangement	(28)	(24)	(26)
Forward purchase contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	13	26	30
Derivative asset, subject to master netting arrangement, after offset	13	26	30
Derivative liability, fair value	(2)	0	(4)
Derivative liability, subject to master netting arrangement, after offset	(2)	0	(4)
Derivative asset, not subject to master netting arrangement	0	0	4
Derivative liability, not subject to master netting arrangement	0	0	(1)
Forward sales contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	4	1	3
Derivative asset, subject to master netting arrangement, after offset	4	1	3
Derivative liability, fair value	(27)	(55)	(52)
Derivative liability, subject to master netting arrangement, after offset	(27)	(55)	(52)
Derivative liability, not subject to master netting arrangement	(1)	0	(12)
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	84	31	14
Derivative asset, subject to master netting arrangement, after offset	84	31	14
Derivative liability, fair value	(2)	(31)	(1)
Derivative liability, subject to master netting arrangement, after offset	(2)	(31)	(1)
Derivative asset, not subject to master netting arrangement	3	7	5
Derivative liability, not subject to master netting arrangement	(19)	(13)	(6)
Foreign currency contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	1	0	0
Derivative asset, subject to master netting arrangement, after offset	1	0	0
Derivative liability, fair value	(1)	(1)	0
Derivative liability, subject to master netting arrangement, after offset	(1)	(1)	0
Derivative asset, not subject to master netting arrangement	0	1	2
Derivative liability, not subject to master netting arrangement	0	0	(1)
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset, not subject to master netting arrangement	10	18	14
Derivative liability, not subject to master netting arrangement	(1)	0	(1)
Equity warrants
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset, not subject to master netting arrangement	$ 18	$ 4	$ 3

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities - Net Gain (Loss) on Derivatives Included in Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ 7.2	$ (24.6)
Net gain on loan origination and sale activities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ 7.1	$ (24.6)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net gain on loan origination and sale activities	Net gain on loan origination and sale activities
Loan servicing fees, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ (41.9)	$ (13.4)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net loan servicing revenue	Net loan servicing revenue
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ (8.1)	$ 11.5
Forward Contracts \| Net gain on loan origination and sale activities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	16.7	(36.8)
Forward Contracts \| Loan servicing fees, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	(16.3)	(1.6)
Interest rate contracts \| Net gain on loan origination and sale activities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	(2.2)	1.2
Interest rate contracts \| Loan servicing fees, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	(36.3)	19
Other Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	0.7	(0.5)
Future
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ 10.7	$ (4)

Earnings per Share (Details)

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares - basic (shares)	108.5	108.1
Dilutive effect of stock award (shares)	0.5	0.2
Weighted average shares - diluted (shares)	109	108.3
Net income available to common stockholders	$ 174.2	$ 139
Earnings per share:
Basic (dollars per share)	$ 1.61	$ 1.29
Diluted (dollars per share)	$ 1.60	$ 1.28

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Effective tax rate	23.50%	23%
Deferred tax assets, net	$ 300		$ 287
Deferred tax valuation allowance	0		0
Investments in LIHTC and renewable energy	553		573
Investment-related Liabilities	308		$ 322
Amortization of tax credit investments	18.6	$ 11.3
Increase (decrease) in DTA	$ 13

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Loss Contingencies [Line Items]
Letters of credit expiration period	1 year
Other conditional commitments	$ 38		$ 32
Percentage of CRE loans occupied by owners	16%		16%
Lease cost	$ 7	$ 7.4
Lessee, operating lease, other cost	$ 1.5	$ 1.3
Commercial Real Estate Portfolio Segment \| Loans Receivable \| Credit Concentration Risk
Loss Contingencies [Line Items]
Percent of commercial real estate related loans	32%		33%
Commercial and industrial \| Loans Receivable \| Credit Concentration Risk
Loss Contingencies [Line Items]
Percent of commercial real estate related loans	39%		38%
Unfunded Loan Commitment
Loss Contingencies [Line Items]
Loss contingency accrual	$ 33		$ 32

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Total amount	$ 13,771	$ 13,931
Commitments to extend credit
Other Commitments [Line Items]
Unsecured loan commitments	937	989
Total amount	13,106	13,291
Credit card guarantees
Other Commitments [Line Items]
Total amount	427	418
Standby letters of credit
Other Commitments [Line Items]
Unsecured letters of credit	6	4
Total amount	$ 238	$ 222

Fair Value Accounting - Gains a

Fair Value Accounting - Gains and Losses from Fair Value Changes Included in Consolidated Statement of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes included in OCI, net of tax	$ (0.5)	$ (1.1)
Junior Subordinated Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized losses	$ (0.7)	$ (1.5)

Fair Value Accounting - Fair Va

Fair Value Accounting - Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	$ 14,509	$ 11,165
Investment securities - equity	130	126
Fair value of mortgage servicing rights	1,178	1,124	$ 910	$ 1,148
Junior subordinated debt	64	63
Cumulative basis adjustment including carrying value of hedged items	(66)	(6)
Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	586	530
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	367	367
Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	1,091	1,117
Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	4,536	1,972
CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities		1,399
Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	849	858
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	7,011	4,853
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	69	69
CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	25	26
Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	105	100
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	14,509	11,165
Investment securities - equity	130	126
Loans HFS	1,812	1,380
Fair value of mortgage servicing rights	1,178	1,124
Derivative asset	133	88
Derivative liabilities	53	100
Fair Value, Recurring \| Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	586	530
Fair Value, Recurring \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	367	367
Fair Value, Recurring \| Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	1,091	1,117
Fair Value, Recurring \| Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	4,536	1,972
Fair Value, Recurring \| CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities		1,399
Fair Value, Recurring \| Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	849	858
Fair Value, Recurring \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	7,011	4,853
Fair Value, Recurring \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	69	69
Fair Value, Recurring \| CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	25	26
Fair Value, Recurring \| Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	105	100
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	7,039	4,881
Investment securities - equity	130	126
Loans HFS	0	0
Fair value of mortgage servicing rights	0	0
Derivative asset	0	0
Junior subordinated debt	0	0
Derivative liabilities	0	0
Margin, asset	139	202
Margin, liability	8	(9)
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities		0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	7,011	4,853
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	28	28
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	25	26
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	105	100
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	7,470	6,284
Investment securities - equity	0	0
Loans HFS	1,809	1,377
Fair value of mortgage servicing rights	0	0
Derivative asset	105	66
Junior subordinated debt	0	0
Derivative liabilities	52	100
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	586	530
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	367	367
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	1,091	1,117
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	4,536	1,972
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities		1,399
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	849	858
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	41	41
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0	0
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Investment securities - equity	0	0
Loans HFS	3	3
Fair value of mortgage servicing rights	1,178	1,124
Derivative asset	28	22
Junior subordinated debt	64	63
Derivative liabilities	1	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities		0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total AFS debt securities	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	$ 0	$ 0

Fair Value Accounting - Change

Fair Value Accounting - Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes included in OCI, net of tax	$ (0.5)	$ (1.1)
Junior subordinated debt	64		$ 63
Mark to market adjustments	0	3
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debt	64		$ 63
Junior Subordinated Debt
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value	$ (0.7)	(1.5)
Debt Instrument, measurement input	0.0873		0.0892
Junior Subordinated Debt \| Significant Unobservable Inputs (Level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debt	$ 64		$ 63
Junior Subordinated Debt \| Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(62.8)	(62.5)
Ending balance	$ (63.5)	$ (64)

Fair Value Accounting - Chang_2

Fair Value Accounting - Change in Level 3 Assets Unobservable Inputs (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mark to market adjustments	$ 0	$ 3
Servicing Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,124	1,148
Purchases and additions	189	142
Sales and payments	(156)	(350)
Change in fair value	60	(8)
Realization of cash flows	(39)	(25)
Balance, end of period	1,178	910
Change in unrealized gains for the period	46	(3)
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	18	2
Purchases and additions	4,060	2,946
Settlement of IRLCs upon acquisition or origination of loans HFS	(4,067)	(2,935)
Change in fair value	(1)	1
Balance, end of period	10	14
Change in unrealized gains for the period	$ 10	$ 14

Fair Value Accounting - Unobser

Fair Value Accounting - Unobservable Inputs (Details) $ in Millions	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 441	$ 379
Other assets acquired through foreclosure	8	8
Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	441	379
Other assets acquired through foreclosure	$ 8	$ 8
Minimum \| Third party appraisal \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	6%	6%
Minimum \| Third party appraisal \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Other Assets \| Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure, measurement input	4%	4%
Minimum \| Discount rate \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	3%	3%
Minimum \| Scheduled cash collections \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	0%	0%
Minimum \| Proceeds from non-real estate collateral \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	0%	0%
Minimum \| Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	(0.0043)	0.0029
Minimum \| Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.091	0.095
Minimum \| Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.200	0.200
Minimum \| Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.00250	0.00250
Minimum \| Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	75	93
Minimum \| Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	3.5	3.2
Minimum \| Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.68	0.68
Maximum \| Third party appraisal \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	10%	10%
Maximum \| Third party appraisal \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Other Assets \| Valuation Technique, Collateral Method
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure, measurement input	10%	10%
Maximum \| Discount rate \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	8%	8%
Maximum \| Scheduled cash collections \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	20%	20%
Maximum \| Proceeds from non-real estate collateral \| Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3) \| Loans and Finance Receivables \| Valuation Technique, Discounted Cash Flow
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI, measurement input	70%	70%
Maximum \| Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.0297	0.0253
Maximum \| Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.220	0.239
Maximum \| Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.200	0.200
Maximum \| Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.00565	0.00565
Maximum \| Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	95	100
Maximum \| Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	5.7	5.4
Maximum \| Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	1	1
Weighted Average \| Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.0213	0.0213
Weighted Average \| Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.161	0.174
Weighted Average \| Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.20	0.200
Weighted Average \| Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.00384	0.00356
Weighted Average \| Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	86	95
Weighted Average \| Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	4.6	4.3
Weighted Average \| Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.86	0.89

Fair Value Accounting - Aggrega

Fair Value Accounting - Aggregate Difference Between Fair Value and UPB for Fair Value Option Loans (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, option, loans held as assets, current through 89 days	$ 1,812	$ 1,379
UPB, option, loans held as assets, current through 89 days	1,755	1,319
Fair value, option, loans held as assets, current through 89 days, aggregate difference	57	60
Fair Value, 90 days or more delinquent	0	1
UPB, op days or more delinquent	0	2
Aggregated difference, 90 days or more delinquent	0	(1)
Loans held-for-sale, fair value	1,812	1,380
Fair value option, aggregate difference	57	59
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing receivable, UPB	$ 1,755	$ 1,321

Fair Value Accounting - Assets

Fair Value Accounting - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value, Nonrecurring - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 441	$ 379
Other assets acquired through foreclosure	8	8
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	0	0
Other assets acquired through foreclosure	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	0	0
Other assets acquired through foreclosure	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	441	379
Other assets acquired through foreclosure	$ 8	$ 8

Fair Value Accounting - Estimat

Fair Value Accounting - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financial assets
HTM	$ 1,461	$ 1,429
AFS	14,509	11,165
Investment securities - equity	130	126
Loans HFS	1,841	1,402
Net loans HFI	50,360	49,960
Mortgage servicing rights	1,178	1,124
Accrued interest receivable	5	5
Financial liabilities
Total deposits	62,228	55,333
Other borrowings	6,221	7,230
Junior subordinated debt	64	63
Fair Value, Nonrecurring \| Carrying Amount
Financial assets
HTM	1,461	1,429
Net loans HFI	50,360	49,960
Accrued interest receivable	360	370
Financial liabilities
Total deposits	62,228	55,333
Other borrowings	6,221	7,230
Junior subordinated debt	896	895
Accrued interest payable	168	151
Fair Value, Nonrecurring \| Estimate of Fair Value Measurement
Financial assets
HTM	1,253	1,251
Net loans HFI	47,245	46,877
Accrued interest receivable	360	370
Financial liabilities
Total deposits	62,263	55,379
Other borrowings	6,184	7,192
Junior subordinated debt	811	810
Accrued interest payable	168	151
Fair Value, Nonrecurring \| Estimate of Fair Value Measurement \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
HTM	0	0
Net loans HFI	0	0
Accrued interest receivable	0	0
Financial liabilities
Total deposits	0	0
Other borrowings	0	0
Junior subordinated debt	0	0
Accrued interest payable	0	0
Fair Value, Nonrecurring \| Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2)
Financial assets
HTM	1,253	1,251
Net loans HFI	0	0
Accrued interest receivable	360	370
Financial liabilities
Total deposits	62,263	55,379
Other borrowings	6,184	7,192
Junior subordinated debt	734	734
Accrued interest payable	168	151
Fair Value, Nonrecurring \| Estimate of Fair Value Measurement \| Significant Unobservable Inputs (Level 3)
Financial assets
HTM	0	0
Net loans HFI	47,245	46,877
Accrued interest receivable	0	0
Financial liabilities
Total deposits	0	0
Other borrowings	0	0
Junior subordinated debt	77	76
Accrued interest payable	0	0
Fair Value, Recurring
Financial assets
AFS	14,509	11,165
Investment securities - equity	130	126
Derivative asset	133	88
Financial liabilities
Derivative liabilities	53	100
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
AFS	7,039	4,881
Investment securities - equity	130	126
Derivative asset	0	0
Financial liabilities
Junior subordinated debt	0	0
Derivative liabilities	0	0
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2)
Financial assets
AFS	7,470	6,284
Investment securities - equity	0	0
Derivative asset	105	66
Financial liabilities
Junior subordinated debt	0	0
Derivative liabilities	52	100
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3)
Financial assets
AFS	0	0
Investment securities - equity	0	0
Derivative asset	28	22
Financial liabilities
Junior subordinated debt	64	63
Derivative liabilities	1	0
Fair Value, Recurring \| Carrying Amount
Financial assets
AFS	14,509	11,165
Investment securities - equity	130	126
Derivative asset	133	84
Loans HFS	1,841	1,402
Mortgage servicing rights	1,178	1,124
Financial liabilities
Derivative liabilities	53	100
Fair Value, Recurring \| Estimate of Fair Value Measurement
Financial assets
AFS	14,509	11,165
Investment securities - equity	130	126
Derivative asset	133	84
Loans HFS	1,841	1,402
Mortgage servicing rights	1,178	1,124
Financial liabilities
Derivative liabilities	53	100
Fair Value, Recurring \| Estimate of Fair Value Measurement \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
AFS	7,039	4,881
Investment securities - equity	130	126
Derivative asset	0	0
Loans HFS	0	0
Mortgage servicing rights	0	0
Financial liabilities
Derivative liabilities	0	0
Fair Value, Recurring \| Estimate of Fair Value Measurement \| Significant Other Observable Inputs (Level 2)
Financial assets
AFS	7,470	6,284
Investment securities - equity	0	0
Derivative asset	105	66
Loans HFS	1,818	1,379
Mortgage servicing rights	0	0
Financial liabilities
Derivative liabilities	52	100
Fair Value, Recurring \| Estimate of Fair Value Measurement \| Significant Unobservable Inputs (Level 3)
Financial assets
AFS	0	0
Investment securities - equity	0	0
Derivative asset	28	18
Loans HFS	23	23
Mortgage servicing rights	1,178	1,124
Financial liabilities
Derivative liabilities	$ 1	$ 0

Fair Value Accounting - Additio

Fair Value Accounting - Additional Information (Detail)	3 Months Ended	12 Months Ended
Fair Value Accounting - Additional Information (Detail)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 14,509,000,000	$ 11,165,000,000
Commitments and contingencies (Note 14)
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,011,000,000	4,853,000,000
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded	$ 3,000,000	$ 10,000,000
Junior Subordinated Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, measurement input	0.0873	0.0892
Percentage of LIBOR	5.30%	5.33%
Period of basis point spread	3.43%	3.59%
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 441,000,000	$ 379,000,000
Other assets acquired through foreclosure	8,000,000	8,000,000
Fair Value, Nonrecurring \| Letter of Credit \| Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commitments and contingencies (Note 14)	0	0
Fair Value, Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	441,000,000	379,000,000
Other assets acquired through foreclosure	8,000,000	8,000,000
Fair Value, Nonrecurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	0	0
Other assets acquired through foreclosure	0	0
Fair Value, Nonrecurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	0	0
Other assets acquired through foreclosure	0	0
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	14,509,000,000	11,165,000,000
Fair Value, Recurring \| Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	14,509,000,000	11,165,000,000
Fair Value, Recurring \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,011,000,000	4,853,000,000
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0	0
Fair Value, Recurring \| Significant Unobservable Inputs (Level 3) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	0	0
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,039,000,000	4,881,000,000
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,039,000,000	4,881,000,000
Fair Value, Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,011,000,000	4,853,000,000
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,470,000,000	6,284,000,000
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	7,470,000,000	6,284,000,000
Fair Value, Recurring \| Significant Other Observable Inputs (Level 2) \| U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 0	$ 0

Segments - Operating Segment In

Segments - Operating Segment Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) Reportable_Business_Segments	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Operating Statistics [Line Items]
Reportable segments \| Reportable_Business_Segments	3
Goodwill weighting assigned	100%
Cash, cash equivalents, and investments	$ 19,890		$ 14,569
Loans HFS	1,841		1,402
Loans HFI, net of deferred fees and costs	50,700		50,297
Less: allowance for credit losses	(340.3)	$ (304.7)	(336.7)	$ (309.7)
Net loans HFI	50,360		49,960
Other assets acquired through foreclosure, net	8		8
Goodwill and intangible assets, net	666		669
Other assets	4,224		4,254
Total assets	76,989		70,862
Total deposits	62,228		55,333
Borrowings and qualifying debt	7,117		8,125
Other liabilities	1,472		1,326
Total liabilities	70,817		64,784
Allocated equity:	6,172.5	5,520.5	6,078.4	$ 5,356
Total liabilities and stockholders' equity	76,989		70,862
Excess funds provided (used)	0		0
Net interest income	598.9	609.9
Provision for (recovery of) credit losses	15.2	19.4
Net interest income after provision for credit losses	583.7	590.5
Non-interest income	129.9	(58)
Non-interest expense	481.8	347.9
Income before provision for income taxes	231.8	184.6
Income tax expense (benefit)	54.4	42.4
Net income	$ 177.4	142.2
Minimum
Operating Statistics [Line Items]
Equity capital weighting assigned	0%
Maximum
Operating Statistics [Line Items]
Equity capital weighting assigned	20%
Operating Segments \| Commercial Segment
Operating Statistics [Line Items]
Cash, cash equivalents, and investments	$ 12		13
Loans HFS	0		0
Loans HFI, net of deferred fees and costs	29,642		29,136
Less: allowance for credit losses	(287)		(284)
Net loans HFI	29,355		28,852
Other assets acquired through foreclosure, net	8		8
Goodwill and intangible assets, net	291		292
Other assets	414		390
Total assets	30,080		29,555
Total deposits	25,146		23,897
Borrowings and qualifying debt	9		7
Other liabilities	139		109
Total liabilities	25,294		24,013
Allocated equity:	2,590		2,555
Total liabilities and stockholders' equity	27,884		26,568
Excess funds provided (used)	(2,196)		(2,987)
Net interest income	288.8	389.4
Provision for (recovery of) credit losses	15.3	(2.7)
Net interest income after provision for credit losses	273.5	392.1
Non-interest income	26.1	(96.7)
Non-interest expense	156	136
Income before provision for income taxes	143.6	159.4
Income tax expense (benefit)	33.7	38.5
Net income	109.9	120.9
Operating Segments \| Consumer Related Segment
Operating Statistics [Line Items]
Cash, cash equivalents, and investments	0		125
Loans HFS	1,841		1,402
Loans HFI, net of deferred fees and costs	21,058		21,161
Less: allowance for credit losses	(53)		(53)
Net loans HFI	21,005		21,108
Other assets acquired through foreclosure, net	0		0
Goodwill and intangible assets, net	375		377
Other assets	1,961		1,826
Total assets	25,182		24,838
Total deposits	30,481		24,925
Borrowings and qualifying debt	21		402
Other liabilities	421		338
Total liabilities	30,923		25,665
Allocated equity:	1,814		1,790
Total liabilities and stockholders' equity	32,737		27,455
Excess funds provided (used)	7,555		2,617
Net interest income	292.6	199.3
Provision for (recovery of) credit losses	(0.4)	1.5
Net interest income after provision for credit losses	293	197.8
Non-interest income	95.7	51
Non-interest expense	295.9	192
Income before provision for income taxes	92.8	56.8
Income tax expense (benefit)	21.8	12.8
Net income	71	44
Corporate & Other \| Corporate And Other Segment
Operating Statistics [Line Items]
Cash, cash equivalents, and investments	19,878		14,431
Loans HFS	0		0
Loans HFI, net of deferred fees and costs	0		0
Less: allowance for credit losses	0		0
Net loans HFI	0		0
Other assets acquired through foreclosure, net	0		0
Goodwill and intangible assets, net	0		0
Other assets	1,849		2,038
Total assets	21,727		16,469
Total deposits	6,601		6,511
Borrowings and qualifying debt	7,087		7,716
Other liabilities	912		879
Total liabilities	14,600		15,106
Allocated equity:	1,768		1,733
Total liabilities and stockholders' equity	16,368		16,839
Excess funds provided (used)	(5,359)		$ 370
Net interest income	17.5	21.2
Provision for (recovery of) credit losses	0.3	20.6
Net interest income after provision for credit losses	17.2	0.6
Non-interest income	8.1	(12.3)
Non-interest expense	29.9	19.9
Income before provision for income taxes	(4.6)	(31.6)
Income tax expense (benefit)	(1.1)	(8.9)
Net income	$ (3.5)	$ (22.7)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue	$ 13.5	$ 14