Western Alliance Bancorporation (WAL) 10-Q 31 Oct 24 2024 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2024	Oct. 25, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 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		110,069,292
Entity Central Index Key	0001212545
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
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	Sep. 30, 2024	Dec. 31, 2023
Assets:
Cash and due from banks	$ 398	$ 276
Interest bearing deposits in other financial institutions	2,194	1,300
Cash and cash equivalents	2,592	1,576
Investment securities - AFS, at fair value; amortized cost of $15,258 at September 30, 2024 and $11,849 at December 31, 2023 (ACL of $0.4 and $1.4 at September 30, 2024 and December 31, 2023)	14,750	11,165
Investment securities - HTM, at amortized cost and net of ACL of $10 and $8 (fair value of $1,371 and $1,251) at September 30, 2024 and December 31, 2023, respectively	1,515	1,421
Investment securities - equity	117	126
Investments in restricted stock, at cost	171	281
Loans HFS	2,327	1,402
Loans:
Loans HFI, net of deferred fees and costs	53,346	50,297
Less: allowance for credit losses	(356.6)	(336.7)
Net loans HFI	52,989	49,960
Mortgage servicing rights	1,011	1,124
Premises and equipment, net	354	339
Operating lease right of use asset	127	145
Bank owned life insurance	1,000	186
Goodwill and intangible assets, net	661	669
Deferred tax assets, net	254	287
Investments in LIHTC and renewable energy	560	573
Other assets	1,652	1,608
Total assets	80,080	70,862
Deposits:
Non-interest bearing	24,965	14,520
Interest bearing	43,075	40,813
Total deposits	68,040	55,333
Other borrowings	2,995	7,230
Qualifying debt	898	895
Operating lease liability	159	179
Other liabilities	1,311	1,147
Total liabilities	73,403	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 September 30, 2024 and December 31, 2023)	295	295
Common stock (par value $0.0001; 200,000,000 authorized; 112,917,197 shares issued at September 30, 2024 and 112,169,523 at December 31, 2023) and additional paid in capital	2,235	2,197
Treasury stock, at cost (2,844,743 shares at September 30, 2024 and 2,703,218 shares at December 31, 2023)	(125)	(116)
Accumulated other comprehensive loss	(382)	(513)
Retained earnings	4,654	4,215
Total stockholders’ equity	6,677.1	6,078.4
Total liabilities and stockholders’ equity	$ 80,080	$ 70,862

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Amortized cost	$ 15,258	$ 11,849
Investment securities - AFS, ACL	0.4	1.4
Investment securities - HTM, allowance for credit losses	10	8
Investment securities - HTM, fair value	$ 1,371	$ 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)	112,917,197	112,169,523
Treasury stock (shares)	2,844,743	2,703,218

CONSOLIDATED INCOME STATEMENTS

CONSOLIDATED INCOME STATEMENTS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest income:
Loans, including fees	$ 945.3	$ 860.8	$ 2,713.9	$ 2,550.7
Investment securities	195.4	121	526.2	325.6
Dividends and other	59.3	44.8	162.4	120
Total interest income	1,200	1,026.6	3,402.5	2,996.3
Interest expense:
Deposits	422.1	316.2	1,213	798.9
Qualifying debt	9.5	9.5	28.6	28.3
Other borrowings	71.5	113.9	208.5	421.9
Total interest expense	503.1	439.6	1,450.1	1,249.1
Net interest income	696.9	587	1,952.4	1,747.2
Provision for credit losses	33.6	12.1	85.9	53.3
Net interest income after provision for credit losses	663.3	574.9	1,866.5	1,693.9
Non-interest income:
Net gain on loan origination and sale activities	46.3	52	138.4	145.7
Service charges and loan fees	30.1	29.7	64.3	72.3
Net loan servicing revenue	12.3	27.2	96.8	93.2
Gain (loss) on sales of investment securities	8.8	0.1	10.2	(26)
Income from equity investments	5.8	0.5	27.1	2.6
Fair value gain (loss) adjustments, net	4.1	17.8	5.1	(117.3)
Gain (loss) on recovery from credit guarantees	0.2	(4)	(2.8)	0.5
Other income	18.6	5.9	32.2	19.2
Total non-interest income	126.2	129.2	371.3	190.2
Non-interest expense:
Deposit costs	208	127.8	518.7	305.7
Salaries and employee benefits	157.8	137.2	465.7	431.7
Data processing	38.7	33.9	110.4	88.9
Insurance	35.4	33.1	128.1	81.8
Legal, professional, and directors' fees	24.8	28.3	80.7	77.8
Loan servicing expenses	18.7	11.9	50.3	44.1
Occupancy	17.6	16.8	53.5	48.7
Business development and marketing	9.7	4.9	21.6	15.1
Loan acquisition and origination expenses	5.9	5.6	15.8	15.6
Gain on extinguishment of debt	0	0	0	(13.4)
Other expense	20.8	26.7	61.2	65.5
Total non-interest expense	537.4	426.2	1,506	1,161.5
Income before provision for income taxes	252.1	277.9	731.8	722.6
Income tax expense	52.3	61.3	161	148.1
Net income	199.8	216.6	570.8	574.5
Dividends on preferred stock	3.2	3.2	9.6	9.6
Net income available to common stockholders	$ 196.6	$ 213.4	$ 561.2	$ 564.9
Earnings per share:
Basic (dollars per share)	$ 1.81	$ 1.97	$ 5.17	$ 5.22
Diluted (dollars per share)	$ 1.80	$ 1.97	$ 5.14	$ 5.21
Weighted average number of common shares outstanding:
Basic (shares)	108.7	108.3	108.6	108.3
Diluted (shares)	109.5	108.5	109.2	108.4
Dividends declared per common share (dollars per share)	$ 0.37	$ 0.36	$ 1.11	$ 1.08

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 199.8	$ 216.6	$ 570.8	$ 574.5
Other comprehensive income (loss), net:
Unrealized gain (loss) on AFS securities, net of tax effect of $(60.4), $41.2, $(46.1), and $31.7 respectively	183.7	(120.2)	140.5	(94.3)
Unrealized (loss) on SERP, net of tax effect of $0, $—, $0, and $—, respectively	(0.1)	0	(0.1)	0
Unrealized (loss) gain on junior subordinated debt, net of tax effect of $0.1, $0.4, $0.5, and $(0.9) respectively	(0.3)	(1.2)	(1.3)	2.7
Realized (gain) loss on sale of AFS securities included in income, net of tax effect of $2.2, $0.1, $2.6, and $(6.4) respectively	(6.6)	(0.4)	(7.7)	19.1
Realized loss on impairment of AFS securities included in income, net of tax effect of $— , $—, $—, and $(0.4) respectively	0	0	0	1.2
Net other comprehensive income (loss)	176.7	(121.8)	131.4	(71.3)
Comprehensive income	$ 376.5	$ 94.8	$ 702.2	$ 503.2

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Unrealized (loss) gain on AFS securities, tax effect	$ (60.4)	$ 41.2	$ (46.1)	$ 31.7
Unrealized (loss) on SERP, tax effect	0	0	0	0
Unrealized gain (loss) on junior subordinated debt, tax effect	0.1	0.4	0.5	(0.9)
Realized loss (gain) on sale of AFS securities included in income, tax effect	2.2	0.1	2.6	(6.4)
Realized loss on impairment of AFS securities included in income, tax effect	$ 0	$ 0	$ 0	$ (0.4)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ 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			12,000,000	108,900,000
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		574.5							574.5
Restricted stock, performance stock units, and other grants, net (shares)				700,000
Restricted stock, performance stock units, and other grants, net		$ 25.5				25.5
Restricted stock surrendered (shares)		151,358		100,000	[1]
Restricted stock surrendered	[1]	$ 10.9					10.9
Dividends paid to preferred stockholders		(9.6)							(9.6)
Dividends paid to common stockholders		(118.2)							(118.2)
Other comprehensive income (loss), net		(71.3)						(71.3)
Ending balance (shares) at Sep. 30, 2023			12,000,000	109,500,000
Ending balance at Sep. 30, 2023		5,746	$ 294.5	$ 0		2,189.2	(116.2)	(732.3)	4,110.8
Beginning balance (shares) at Jun. 30, 2023			12,000,000	109,500,000
Beginning balance at Jun. 30, 2023		5,684.9	$ 294.5	$ 0		2,180.3	(116.2)	(610.5)	3,936.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		216.6							216.6
Restricted stock, performance stock units, and other grants, net		$ 8.9				8.9
Restricted stock surrendered (shares)		139
Dividends paid to preferred stockholders		$ (3.2)							(3.2)
Dividends paid to common stockholders		(39.4)							(39.4)
Other comprehensive income (loss), net		(121.8)						(121.8)
Ending balance (shares) at Sep. 30, 2023			12,000,000	109,500,000
Ending balance at Sep. 30, 2023		5,746	$ 294.5	$ 0		2,189.2	(116.2)	(732.3)	4,110.8
Beginning balance (shares) at Dec. 31, 2023			12,000,000	109,400,000
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		570.8							570.8
Restricted stock, performance stock units, and other grants, net (shares)				800,000
Restricted stock, performance stock units, and other grants, net		$ 37				37
Restricted stock surrendered (shares)		141,525		100,000	[1]
Restricted stock surrendered	[1]	$ 8.7					8.7
Dividends paid to preferred stockholders		(9.6)							(9.6)
Dividends paid to common stockholders		(122.2)							(122.2)
Other comprehensive income (loss), net		131.4						131.4
Ending balance (shares) at Sep. 30, 2024			12,000,000	110,100,000
Ending balance at Sep. 30, 2024		6,677.1	$ 294.5	$ 0		2,235.1	(125)	(381.5)	4,654
Beginning balance (shares) at Jun. 30, 2024			12,000,000	110,200,000
Beginning balance at Jun. 30, 2024		6,334.2	$ 294.5	$ 0		2,224.7	(124.9)	(558.2)	4,498.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		199.8							199.8
Restricted stock, performance stock units, and other grants, net (shares)				(100,000)
Restricted stock, performance stock units, and other grants, net		$ 11.4				11.4
Restricted stock surrendered (shares)		1,042
Restricted stock surrendered	[2]	$ 1.1				1	0.1
Dividends paid to preferred stockholders		(3.2)							(3.2)
Dividends paid to common stockholders		(40.7)							(40.7)
Other comprehensive income (loss), net		176.7						176.7
Ending balance (shares) at Sep. 30, 2024			12,000,000	110,100,000
Ending balance at Sep. 30, 2024		$ 6,677.1	$ 294.5	$ 0		$ 2,235.1	$ (125)	$ (381.5)	$ 4,654
[1]Share amounts represent Treasury Shares.[2] Share amounts represent Treasury Shares.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net income		$ 570.8	$ 574.5
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses		85.9	53.3
Depreciation and amortization		64.6	43.9
Stock-based compensation		37	25.4
Deferred income taxes		(10)	(31.8)
Amortization of net discounts for investment securities		(170.6)	(43.4)
Amortization of tax credit investments		55.3	66.9
Amortization of operating lease right of use asset		18	17.6
Amortization of net deferred loan fees and net purchase premiums		(66.8)	(64.8)
Purchases and originations of loans HFS		(35,134.2)	(32,403.8)
Proceeds from sales and payments on loans HFS		32,872.9	31,552.2
Mortgage servicing rights capitalized upon sale of mortgage loans		(625.9)	(653)
Net losses (gains) on:
Change in fair value of loans HFS, mortgage servicing rights, and related derivatives		83	(44.6)
Fair value adjustments		(11.5)	122.2
Sale of investment securities		(10.2)	26
Extinguishment of debt		0	(13.4)
Other		(16.6)	8.1
Other assets and liabilities, net		138	94.9
Net cash used in operating activities		(2,120.3)	(669.8)
Investment securities - AFS
Purchases		(14,325.2)	(6,853.5)
Principal pay downs and maturities		7,219.5	3,559.2
Proceeds from sales		4,020.7	777.8
Investment securities - HTM
Purchases		(121.5)	(163.2)
Principal pay downs and maturities		26	51.5
Equity securities carried at fair value
Purchases		(0.6)	(0.5)
Redemptions		15	9
Proceeds from sales		0	1.5
Proceeds from sale of mortgage servicing rights and related holdbacks, net		653.8	615.6
Sale (purchase) of other investments		33.9	(116.6)
Net (increase) decrease in loans HFI		(3,218.7)	1,926.5
Purchase of premises, equipment, and other assets, net		(57.1)	(87)
Purchase of bank owned life insurance		(800)	0
Net cash used in investing activities		(6,554.2)	(279)
Cash flows from financing activities:
Net increase in deposits		12,707.3	642.9
Net proceeds from issuance of long-term debt		1,000	9.9
Payments on long-term debt		(19.1)	(538.4)
Net (decrease) increase in short-term borrowings		(3,857.2)	2,962.9
Net proceeds from repurchase obligations		0	2,661.8
Payments on repurchase obligations		0	(2,198)
Cash paid for tax withholding on vested restricted stock and other		(8.7)	(10.9)
Cash dividends paid on common and preferred stock		(131.8)	(127.8)
Net cash provided by financing activities		9,690.5	3,402.4
Net increase in cash and cash equivalents		1,016	2,453.6
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		2,592.1	3,497
Cash paid (received) during the period for:
Interest		1,435.7	1,108.5
Income taxes, net		(27.5)	57
Non-cash activities:
Transfers of mortgage-backed securities in settlement of secured borrowings		1,369.3	461.2
Transfers of securitized loans HFS to AFS securities		123	182
Transfers of loans HFI to HFS, net of fair value loss adjustment	[1]	207.8	6,646.8
Transfers of loans HFS to HFI, at amortized cost		$ 1.8	$ 2,357.2
[1] (1) Activity for the nine months ended September 30, 2024 and 2023 excludes $333.3 million and $426.4 million, respectively, of loans transferred with an original designation of HFS, which sales activity was classified as operating cash flows.

CONSOLIDATED STATEMENTS OF CA_2

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of Cash Flows [Abstract]
Loans transferred with original designation of HFS, operating cash flows	$ 333.3	$ 426.4

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 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 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 September 30, 2024 and for the three and nine months ended September 30, 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. As the amendments in this update relate entirely to enhanced disclosure requirements, adoption of this guidance will not have an impact on the Company's financial position or results of operations. Upon adoption, the Company expects to disclose additional expense detail within its segment disclosures. 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 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 September 30, 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	9 Months Ended
	Sep. 30, 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: September 30, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,346 $ 3 $ (125) $ 1,224 Private label residential MBS 179 — (32) 147 Total HTM securities $ 1,525 $ 3 $ (157) $ 1,371 Available-for-sale debt securities Residential MBS issued by GSEs $ 5,887 $ 58 $ (316) $ 5,629 U.S. Treasury securities 5,597 4 (1) 5,600 Private label residential MBS 1,205 1 (164) 1,042 Tax-exempt 930 — (60) 870 Commercial MBS issued by GSEs 648 13 (8) 653 CLO 509 — (1) 508 Corporate debt securities 407 — (28) 379 Other 75 1 (7) 69 Total AFS debt securities $ 15,258 $ 77 $ (585) $ 14,750 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 $117 million and $126 million at September 30, 2024 and December 31, 2023, respectively. Unrealized gains on equity securities of $3.2 million and $5.1 million for the three months ended September 30, 2024 and 2023, respectively, and unrealized gains of $5.9 million and losses of $3.3 million for the nine months ended September 30, 2024 and 2023, respectively, were recognized in earnings as a component of Fair value gain (loss) adjustments, net. Securities with carrying amounts of approximately $4.7 billion and $7.7 billion at September 30, 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: September 30, 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 Residential MBS issued by GSEs $ 1 $ 150 $ 315 $ 1,568 $ 316 $ 1,718 U.S. Treasury securities 1 2,210 — — 1 2,210 Private label residential MBS — — 164 993 164 993 Tax-exempt — — 60 835 60 835 Commercial MBS issued by GSEs 7 92 1 17 8 109 CLO 1 338 — — 1 338 Corporate debt securities (1) — — 28 375 28 375 Other 3 29 4 26 7 55 Total AFS securities $ 13 $ 2,819 $ 572 $ 3,814 $ 585 $ 6,633 (1) Includes securities with an ACL that have a fair value of $8 million and unrealized losses of $1 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 September 30, 2024 was 658, 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 has continued to perform 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, recoveries of credit losses totaling $0.4 million and $1.0 million were recognized during the three and nine months ended September 30, 2024, respectively, compared to a provision for credit losses of $0.3 million and $21.8 million during the three and nine months ended September 30, 2023, respectively. The provision for credit losses for the nine months ended September 30, 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 and nine months ended September 30, 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 consists of highly rated securitization tranches, containing pools of medium- to large-sized corporate, high-yield loans. These are variable rate securities that have an investment grade rating of Single-A or better. Unrealized losses on these securities are 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 September 30, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 0.8 $ (0.4) $ — $ — $ 0.4 Nine Months Ended September 30, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 1.4 $ (1.0) $ — $ — $ 0.4 Three Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ 4.4 $ 0.3 $ — $ — $ 4.7 Nine Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ — $ 21.8 $ (17.1) $ — $ 4.7 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 September 30, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 8.7 $ 0.9 $ — $ — $ 9.6 Nine Months Ended September 30, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 7.8 $ 1.8 $ — $ — $ 9.6 Three Months Ended September 30, 2023 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 6.0 $ 0.7 $ — $ — $ 6.7 Nine Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 1.5 $ — $ — $ 6.7 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 September 30, 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: September 30, 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 $ — $ — $ — $ — $ — $ — $ 1,346 $ 1,346 Private label residential MBS — — — — — — 179 179 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,525 $ 1,525 Available-for-sale debt securities Residential MBS issued by GSEs $ — $ 5,629 $ — $ — $ — $ — $ — $ 5,629 U.S. Treasury securities — 5,600 — — — — — 5,600 Private label residential MBS 1,015 — 27 — — — — 1,042 Tax-exempt 9 15 352 394 — — 100 870 Commercial MBS issued by GSEs — 653 — — — — — 653 CLO 24 — 484 — — — — 508 Corporate debt securities — — — 78 222 79 — 379 Other — 2 8 2 38 1 18 69 Total AFS securities (1) $ 1,048 $ 11,899 $ 871 $ 474 $ 260 $ 80 $ 118 $ 14,750 Equity securities Preferred stock $ — $ — $ — $ — $ 51 $ 29 $ 11 $ 91 CRA investments — 26 — — — — — 26 Total equity securities (1) $ — $ 26 $ — $ — $ 51 $ 29 $ 11 $ 117 (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 September 30, 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 September 30, 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. September 30, 2024 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 34 $ 34 After one year through five years 7 7 After five years through ten years 97 89 After ten years 1,208 1,094 Mortgage-backed securities 179 147 Total HTM securities $ 1,525 $ 1,371 Available-for-sale Due in one year or less $ 5,079 $ 5,081 After one year through five years 697 692 After five years through ten years 567 544 After ten years 1,175 1,109 Mortgage-backed securities 7,740 7,324 Total AFS securities $ 15,258 $ 14,750 The following table presents gross gains and losses on sales of investment securities: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Available-for-sale securities Gross gains $ 8.8 $ 0.5 $ 12.4 $ 4.0 Gross losses — — (2.2) (29.6) Net gains (losses) on AFS securities $ 8.8 $ 0.5 $ 10.2 $ (25.6) Equity securities Gross gains $ — $ — $ — $ — Gross losses — (0.4) — (0.4) Net losses on equity securities $ — $ (0.4) $ — $ (0.4)

Loans Held For Sale

Loans Held For Sale	9 Months Ended
	Sep. 30, 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: September 30, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 816 498 Total government-insured or guaranteed 816 500 Agency-conforming 1,497 899 Non-agency 14 3 Total loans HFS $ 2,327 $ 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 222.5 $ 265.8 $ 625.9 $ 653.0 Net proceeds from sale of loans (1) (116.4) (274.7) (467.7) (612.7) Provision for and change in estimate of liability for losses under representations and warranties, net — 0.1 4.2 2.8 Change in fair value 4.0 (10.1) (1.3) (13.2) Change in fair value of derivatives: Unrealized (loss) gain on derivatives (2.9) 10.3 14.2 25.3 Realized (loss) gain on derivatives (76.3) 44.5 (79.7) 47.0 Total change in fair value of derivatives (79.2) 54.8 (65.5) 72.3 Net gain on residential mortgage loans HFS $ 30.9 $ 35.9 $ 95.6 $ 102.2 Loan acquisition and origination fees 15.4 16.1 42.8 43.5 Net gain on loan origination and sale activities $ 46.3 $ 52.0 $ 138.4 $ 145.7 (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: September 30, 2024 December 31, 2023 (in millions) Warehouse lending $ 7,873 $ 6,618 Municipal & nonprofit 1,667 1,554 Tech & innovation 3,220 2,808 Equity fund resources 906 845 Other commercial and industrial 9,073 7,452 CRE - owner occupied 1,665 1,658 Hotel franchise finance 3,686 3,855 Other CRE - non-owner occupied 6,398 5,974 Residential 12,983 13,287 Residential - EBO 1,037 1,223 Construction and land development 4,665 4,862 Other 173 161 Total loans HFI 53,346 50,297 Allowance for credit losses (357) (337) Total loans HFI, net of allowance $ 52,989 $ 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 $107 million and $108 million reduced the carrying value of loans as of September 30, 2024 and December 31, 2023, respectively. Net unamortized purchase premiums on acquired and purchased loans of $173 million and $177 million increased the carrying value of loans as of September 30, 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: September 30, 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 $ — $ 6 $ 6 $ — Tech & innovation 33 31 64 — Equity fund resources — — — 1 Other commercial and industrial 11 1 12 3 CRE - owner occupied 5 1 6 — Other CRE - non-owner occupied 146 17 163 — Residential — 79 79 — Residential - EBO — — — 313 Construction and land development 18 — 18 — Other 1 — 1 Total $ 214 $ 135 $ 349 $ 317 Loans contractually delinquent by 90 days or more and still accruing totaled $317 million at September 30, 2024 and consisted primarily of government guaranteed EBO residential loans. Additionally, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $96 million at September 30, 2024. 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 $6.6 million and $4.5 million for the three months ended September 30, 2024 and 2023, respectively, and $18.4 million and $8.1 million for the nine months ended September 30, 2024 and 2023, respectively. The following table presents an aging analysis of past due loans by loan portfolio segment: September 30, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 7,873 $ — $ — $ — $ — $ — $ 7,873 Municipal & nonprofit 1,661 — — — — 6 1,667 Tech & innovation 3,156 — — — — 64 3,220 Equity fund resources 905 — — 1 1 — 906 Other commercial and industrial 9,053 4 1 3 8 12 9,073 CRE - owner occupied 1,659 — — — — 6 1,665 Hotel franchise finance 3,651 35 — — 35 — 3,686 Other CRE - non-owner occupied 6,235 — — — — 163 6,398 Residential 12,835 55 14 — 69 79 12,983 Residential - EBO 521 124 79 313 516 — 1,037 Construction and land development 4,647 — — — — 18 4,665 Other 171 1 — — 1 1 173 Total loans $ 52,367 $ 219 $ 94 $ 317 $ 630 $ 349 $ 53,346 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 6 1,554 Tech & innovation 2,808 — — — — 33 2,808 Equity fund resources 845 — — — — — 845 Other commercial and industrial 7,439 13 — — 13 53 7,452 CRE - owner occupied 1,627 — 31 — 31 9 1,658 Hotel franchise finance 3,824 15 16 — 31 — 3,855 Other CRE - non-owner occupied 5,974 — — — — 83 5,974 Residential 13,199 68 20 — 88 70 13,287 Residential - EBO 545 173 106 399 678 — 1,223 Construction and land development 4,820 — — 42 42 19 4,862 Other 160 1 — — 1 — 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 273 $ 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,714 $ 7,863 Special mention — — — — — — 10 10 Classified — — — — — — — — Total $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,724 $ 7,873 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 98 $ 111 $ 246 $ 169 $ 162 $ 858 $ — $ 1,644 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 98 $ 111 $ 253 $ 169 $ 173 $ 863 $ — $ 1,667 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 986 $ 571 $ 376 $ 132 $ — $ 68 $ 867 $ 3,000 Special mention 4 31 29 11 — — 13 88 Classified 11 1 72 3 — — 45 132 Total $ 1,001 $ 603 $ 477 $ 146 $ — $ 68 $ 925 $ 3,220 Current period gross charge-offs $ — $ 1.5 $ — $ — $ 3.5 $ — $ — $ 5.0 Equity fund resources Pass $ 21 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 905 Special mention — — — — — — — — Classified 1 — — — — — — 1 Total $ 22 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 906 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 2,143 $ 1,048 $ 914 $ 379 $ 110 $ 184 $ 4,163 $ 8,941 Special mention — — 6 — — 1 2 9 Classified 12 87 2 18 1 3 — 123 Total $ 2,155 $ 1,135 $ 922 $ 397 $ 111 $ 188 $ 4,165 $ 9,073 Current period gross charge-offs $ — $ 0.2 $ 0.8 $ 4.6 $ — $ 0.3 $ 0.8 $ 6.7 CRE - owner occupied Pass $ 149 $ 166 $ 361 $ 307 $ 149 $ 493 $ 18 $ 1,643 Special mention — — 5 — — — — 5 Classified — — 10 2 — 5 — 17 Total $ 149 $ 166 $ 376 $ 309 $ 149 $ 498 $ 18 $ 1,665 Current period gross charge-offs $ 0.1 $ — $ — $ — $ — $ 0.2 $ — $ 0.3 Hotel franchise finance Pass $ 656 $ 530 $ 1,350 $ 439 $ 33 $ 388 $ 132 $ 3,528 Special mention 23 32 — 39 — — — 94 Classified — — 29 — — 35 — 64 Total $ 679 $ 562 $ 1,379 $ 478 $ 33 $ 423 $ 132 $ 3,686 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 804 $ 1,494 $ 1,712 $ 583 $ 358 $ 303 $ 534 $ 5,788 Special mention 111 38 115 — 1 — — 265 Classified — 146 104 81 13 1 — 345 Total $ 915 $ 1,678 $ 1,931 $ 664 $ 372 $ 304 $ 534 $ 6,398 Current period gross charge-offs $ — $ 17.1 $ 4.5 $ 22.7 $ — $ — $ — $ 44.3 Residential Pass $ 330 $ 245 $ 3,392 $ 7,650 $ 778 $ 439 $ 26 $ 12,860 Special mention — — — — — — — — Classified — 1 38 29 4 7 — 79 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 330 $ 246 $ 3,430 $ 7,679 $ 782 $ 446 $ 26 $ 12,983 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Special mention — — — — — — — — Classified — — — — — — — — Total $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 526 $ 740 $ 1,738 $ 127 $ 2 $ — $ 1,460 $ 4,593 Special mention — — 12 — — — — 12 Classified — 1 18 — 41 — — 60 Total $ 526 $ 741 $ 1,768 $ 127 $ 43 $ — $ 1,460 $ 4,665 Current period gross charge-offs $ — $ — $ 1.5 $ — $ — $ — $ — $ 1.5 Other Pass $ 7 $ 1 $ 9 $ 2 $ 12 $ 79 $ 60 $ 170 Special mention — — — — — 1 — 1 Classified 1 — — — — 1 — 2 Total $ 8 $ 1 $ 9 $ 2 $ 12 $ 81 $ 60 $ 173 Current period gross charge-offs $ — $ — $ — $ — $ — $ 0.2 $ — $ 0.2 Total by Risk Category Pass $ 5,777 $ 5,512 $ 10,526 $ 10,037 $ 2,362 $ 3,133 $ 14,625 $ 51,972 Special mention 138 101 174 50 12 2 25 502 Classified 25 236 273 133 59 57 45 828 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 5,940 $ 5,849 $ 10,973 $ 10,220 $ 2,433 $ 3,192 $ 14,695 $ 53,346 Current period gross charge-offs $ 0.1 $ 18.8 $ 6.8 $ 28.7 $ 3.5 $ 2.2 $ 0.8 $ 60.9 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 nine months ended September 30, 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 $ 0.8 $ 3.3 $ 10.0 $ 3.9 $ 0.1 $ 0.2 $ 0.4 $ 18.7 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 $ — $ — $ 5.1 $ — $ — $ 0.1 $ — $ 5.2 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 nine months ended September 30, 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 $ — $ 0.2 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 $ 2.6 $ 3.4 $ 15.1 $ 3.9 $ 0.1 $ 0.4 $ 0.4 $ 25.9 Restructurings for Borrowers Experiencing Financial Difficulty The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ — $ 2 0.1 % Other commercial and industrial — — — 87 87 1.0 Total $ — $ — $ 2 $ 87 $ 89 0.2 % Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ 29 $ 31 1.0 % Other commercial and industrial — 8 — 87 95 1.0 Other CRE - non-owner occupied — — — 56 56 0.9 Construction and land development — 41 — — 41 0.9 Total $ — $ 49 $ 2 $ 172 $ 223 0.4 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ — $ 7 $ 7 0.3 % Other commercial and industrial — 1 — 12 13 0.2 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 20 — — 20 0.5 Other CRE - non-owner occupied — 20 — — 20 0.3 Total $ — $ 44 $ — $ 19 $ 63 0.1 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ — $ 7 $ 9 0.4 % Other commercial and industrial — 24 — 12 36 0.6 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 46 — — 46 1.1 Other CRE - non-owner occupied — 48 — — 48 0.8 Residential — — — 1 1 0.0 Total $ 2 $ 121 $ — $ 20 $ 143 0.3 % The performance of these modified loans is monitored for 12 months following the modification. As of September 30, 2024, modified loans of $136 million were current with contractual payments and $136 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 either through the borrower's reperformance or completion of a loan modification. During the three and nine months ended September 30, 2024, the Company completed modifications of EBO loans with an amortized cost of $106 million and $285 million, respectively. During the three and nine months ended September 30, 2023, the Company completed modifications of EBO loans with an amortized cost of $84 million and $176 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 September 30, 2024, modified EBO loans consisted of $39 million in loans that were current to 89 days delinquent and $9 million in loans 90 days or more 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 90 days or more delinquent. Collateral-Dependent Loans The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: September 30, 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 — 2 2 — — — Other commercial and industrial — 3 3 — 29 29 CRE - owner occupied 12 — 12 43 — 43 Hotel franchise finance 64 — 64 104 — 104 Other CRE - non-owner occupied 345 — 345 136 — 136 Construction and land development 59 — 59 71 — 71 Total $ 480 $ 10 $ 490 $ 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 September 30, 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 September 30, 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 September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 6.5 $ (0.6) $ — $ — $ 5.9 Municipal & nonprofit 14.0 (0.3) — — 13.7 Tech & innovation 45.0 21.2 3.5 — 62.7 Equity fund resources 1.7 0.2 — — 1.9 Other commercial and industrial 84.3 1.9 0.7 (0.4) 85.9 CRE - owner occupied 5.0 0.1 0.3 — 4.8 Hotel franchise finance 39.6 (1.2) — (0.7) 39.1 Other CRE - non-owner occupied 104.5 10.7 21.7 — 93.5 Residential 18.8 0.4 — — 19.2 Residential - EBO — — — — — Construction and land development 29.9 (1.3) 1.5 — 27.1 Other 2.5 0.3 0.1 (0.1) 2.8 Total $ 351.8 $ 31.4 $ 27.8 $ (1.2) $ 356.6 Nine Months Ended September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 0.1 $ — $ — $ 5.9 Municipal & nonprofit 14.7 (1.0) — — 13.7 Tech & innovation 42.1 25.6 5.0 — 62.7 Equity fund resources 1.3 0.6 — — 1.9 Other commercial and industrial 81.4 10.3 6.7 (0.9) 85.9 CRE - owner occupied 6.0 (0.9) 0.3 — 4.8 Hotel franchise finance 33.4 7.9 2.9 (0.7) 39.1 Other CRE - non-owner occupied 96.0 41.8 44.3 — 93.5 Residential 23.1 (3.9) — — 19.2 Residential - EBO — — — — — Construction and land development 30.4 (1.8) 1.5 — 27.1 Other 2.5 0.4 0.2 (0.1) 2.8 Total $ 336.7 $ 79.1 $ 60.9 $ (1.7) $ 356.6 Three Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.2 $ (0.5) $ — $ — $ 4.7 Municipal & nonprofit 16.5 0.2 — — 16.7 Tech & innovation 33.6 (1.6) — — 32.0 Equity fund resources 1.7 — — — 1.7 Other commercial and industrial 51.8 22.8 5.4 (0.3) 69.5 CRE - owner occupied 8.0 (0.3) — — 7.7 Hotel franchise finance 45.7 (5.1) — — 40.6 Other CRE - non-owner occupied 90.1 8.6 3.0 — 95.7 Residential 33.9 (7.9) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 31.7 (2.6) — — 29.1 Other 2.9 0.7 0.1 (0.1) 3.6 Total $ 321.1 $ 14.3 $ 8.5 $ (0.5) $ 327.4 Nine Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (3.7) $ — $ — $ 4.7 Municipal & nonprofit 15.9 0.8 — — 16.7 Tech & innovation 30.8 3.0 1.8 — 32.0 Equity fund resources 6.4 (4.7) — — 1.7 Other commercial and industrial 85.9 (2.0) 18.7 (4.3) 69.5 CRE - owner occupied 7.1 0.6 — — 7.7 Hotel franchise finance 46.9 (6.3) — — 40.6 Other CRE - non-owner occupied 47.4 53.5 5.2 — 95.7 Residential 30.4 (4.4) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 27.4 1.7 — — 29.1 Other 3.1 0.6 0.2 (0.1) 3.6 Total $ 309.7 $ 39.1 $ 25.9 $ (4.5) $ 327.4 Accrued interest receivable of $271 million and $281 million at September 30, 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 $2 million and $4 million as of September 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Balance, beginning of period $ 35.9 $ 41.1 $ 31.6 $ 47.0 Provision for (recovery of) credit losses 1.7 (3.2) 6.0 (9.1) Balance, end of period $ 37.6 $ 37.9 $ 37.6 $ 37.9 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: September 30, 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 $ 7,873 $ — $ 7,873 $ 5.9 $ — $ 5.9 Municipal & nonprofit 1,661 6 1,667 13.1 0.6 13.7 Tech & innovation 3,089 131 3,220 32.6 30.1 62.7 Equity fund resources 906 — 906 1.9 — 1.9 Other commercial and industrial 8,952 121 9,073 85.4 0.5 85.9 CRE - owner occupied 1,651 14 1,665 4.8 — 4.8 Hotel franchise finance 3,623 63 3,686 39.1 — 39.1 Other CRE - non-owner occupied 6,053 345 6,398 86.6 6.9 93.5 Residential 12,983 — 12,983 19.2 — 19.2 Residential EBO 1,037 — 1,037 — — — Construction and land development 4,606 59 4,665 27.1 — 27.1 Other 172 1 173 2.8 — 2.8 Total $ 52,606 $ 740 $ 53,346 $ 318.5 $ 38.1 $ 356.6 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 and nine months ended September 30, 2024, loan purchases totaled $360 million and $875 million, respectively, and consisted primarily of commercial and industrial and residential loans. Loan purchases during the three and nine months ended September 30, 2023 totaled $329 million and $1.4 billion, 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 and nine months ended September 30, 2024 and 2023. In the normal course of business, the Company also repurchases guaranteed or insured loans under the terms of the GNMA MBS program which can be repooled when loans are brought current either through the borrower's reperformance or completion of a loan modification and have demonstrated sustained performance for a period of time. The Company repurchased $109 million and $291 million of such EBO loans during the three and nine months ended September 30, 2024, respectively. Prior to repurchase, these loans are classified as loans eligible for repurchase, which is included as a component of Other assets on the Consolidated Balance Sheet. During the three and nine months ended September 30, 2024, the Company sold loans with a carrying value of approximately $161 million and $550 million, respectively. The Company recognized charge-offs totaling $0.4 million and a net loss of $0.1 million on these loan sales during the three months ended September 30, 2024. During the nine months ended September 30, 2024, the Company recognized charge-offs totaling $1.8 million and a net loss of $5.7 million on these loan sales. As part of the Company's balance sheet repositioning efforts, during the three and nine months ended September 30, 2023, loans with a carrying value of approximately $442 million and $7.7 billion, respectively, were transferred to HFS. A net loss of $21.4 million and $237.2 million for the three and nine months ended September 30, 2023, respectively, was recognized related to these transfers and any subsequent loan sales. Of the loans transferred to HFS, $904 million and $4.7 billion were disposed of during the three and nine months ended September 30, 2023, respectively and approximately $1.4 billion and $2.4 billion were returned to HFI during the three and nine months ended September 30, 2023, respectively.

Loans, Leases and Allowance for

Loans, Leases and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 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: September 30, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 816 498 Total government-insured or guaranteed 816 500 Agency-conforming 1,497 899 Non-agency 14 3 Total loans HFS $ 2,327 $ 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 222.5 $ 265.8 $ 625.9 $ 653.0 Net proceeds from sale of loans (1) (116.4) (274.7) (467.7) (612.7) Provision for and change in estimate of liability for losses under representations and warranties, net — 0.1 4.2 2.8 Change in fair value 4.0 (10.1) (1.3) (13.2) Change in fair value of derivatives: Unrealized (loss) gain on derivatives (2.9) 10.3 14.2 25.3 Realized (loss) gain on derivatives (76.3) 44.5 (79.7) 47.0 Total change in fair value of derivatives (79.2) 54.8 (65.5) 72.3 Net gain on residential mortgage loans HFS $ 30.9 $ 35.9 $ 95.6 $ 102.2 Loan acquisition and origination fees 15.4 16.1 42.8 43.5 Net gain on loan origination and sale activities $ 46.3 $ 52.0 $ 138.4 $ 145.7 (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: September 30, 2024 December 31, 2023 (in millions) Warehouse lending $ 7,873 $ 6,618 Municipal & nonprofit 1,667 1,554 Tech & innovation 3,220 2,808 Equity fund resources 906 845 Other commercial and industrial 9,073 7,452 CRE - owner occupied 1,665 1,658 Hotel franchise finance 3,686 3,855 Other CRE - non-owner occupied 6,398 5,974 Residential 12,983 13,287 Residential - EBO 1,037 1,223 Construction and land development 4,665 4,862 Other 173 161 Total loans HFI 53,346 50,297 Allowance for credit losses (357) (337) Total loans HFI, net of allowance $ 52,989 $ 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 $107 million and $108 million reduced the carrying value of loans as of September 30, 2024 and December 31, 2023, respectively. Net unamortized purchase premiums on acquired and purchased loans of $173 million and $177 million increased the carrying value of loans as of September 30, 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: September 30, 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 $ — $ 6 $ 6 $ — Tech & innovation 33 31 64 — Equity fund resources — — — 1 Other commercial and industrial 11 1 12 3 CRE - owner occupied 5 1 6 — Other CRE - non-owner occupied 146 17 163 — Residential — 79 79 — Residential - EBO — — — 313 Construction and land development 18 — 18 — Other 1 — 1 Total $ 214 $ 135 $ 349 $ 317 Loans contractually delinquent by 90 days or more and still accruing totaled $317 million at September 30, 2024 and consisted primarily of government guaranteed EBO residential loans. Additionally, the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process totaled $96 million at September 30, 2024. 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 $6.6 million and $4.5 million for the three months ended September 30, 2024 and 2023, respectively, and $18.4 million and $8.1 million for the nine months ended September 30, 2024 and 2023, respectively. The following table presents an aging analysis of past due loans by loan portfolio segment: September 30, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 7,873 $ — $ — $ — $ — $ — $ 7,873 Municipal & nonprofit 1,661 — — — — 6 1,667 Tech & innovation 3,156 — — — — 64 3,220 Equity fund resources 905 — — 1 1 — 906 Other commercial and industrial 9,053 4 1 3 8 12 9,073 CRE - owner occupied 1,659 — — — — 6 1,665 Hotel franchise finance 3,651 35 — — 35 — 3,686 Other CRE - non-owner occupied 6,235 — — — — 163 6,398 Residential 12,835 55 14 — 69 79 12,983 Residential - EBO 521 124 79 313 516 — 1,037 Construction and land development 4,647 — — — — 18 4,665 Other 171 1 — — 1 1 173 Total loans $ 52,367 $ 219 $ 94 $ 317 $ 630 $ 349 $ 53,346 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 6 1,554 Tech & innovation 2,808 — — — — 33 2,808 Equity fund resources 845 — — — — — 845 Other commercial and industrial 7,439 13 — — 13 53 7,452 CRE - owner occupied 1,627 — 31 — 31 9 1,658 Hotel franchise finance 3,824 15 16 — 31 — 3,855 Other CRE - non-owner occupied 5,974 — — — — 83 5,974 Residential 13,199 68 20 — 88 70 13,287 Residential - EBO 545 173 106 399 678 — 1,223 Construction and land development 4,820 — — 42 42 19 4,862 Other 160 1 — — 1 — 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 273 $ 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,714 $ 7,863 Special mention — — — — — — 10 10 Classified — — — — — — — — Total $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,724 $ 7,873 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 98 $ 111 $ 246 $ 169 $ 162 $ 858 $ — $ 1,644 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 98 $ 111 $ 253 $ 169 $ 173 $ 863 $ — $ 1,667 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 986 $ 571 $ 376 $ 132 $ — $ 68 $ 867 $ 3,000 Special mention 4 31 29 11 — — 13 88 Classified 11 1 72 3 — — 45 132 Total $ 1,001 $ 603 $ 477 $ 146 $ — $ 68 $ 925 $ 3,220 Current period gross charge-offs $ — $ 1.5 $ — $ — $ 3.5 $ — $ — $ 5.0 Equity fund resources Pass $ 21 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 905 Special mention — — — — — — — — Classified 1 — — — — — — 1 Total $ 22 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 906 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 2,143 $ 1,048 $ 914 $ 379 $ 110 $ 184 $ 4,163 $ 8,941 Special mention — — 6 — — 1 2 9 Classified 12 87 2 18 1 3 — 123 Total $ 2,155 $ 1,135 $ 922 $ 397 $ 111 $ 188 $ 4,165 $ 9,073 Current period gross charge-offs $ — $ 0.2 $ 0.8 $ 4.6 $ — $ 0.3 $ 0.8 $ 6.7 CRE - owner occupied Pass $ 149 $ 166 $ 361 $ 307 $ 149 $ 493 $ 18 $ 1,643 Special mention — — 5 — — — — 5 Classified — — 10 2 — 5 — 17 Total $ 149 $ 166 $ 376 $ 309 $ 149 $ 498 $ 18 $ 1,665 Current period gross charge-offs $ 0.1 $ — $ — $ — $ — $ 0.2 $ — $ 0.3 Hotel franchise finance Pass $ 656 $ 530 $ 1,350 $ 439 $ 33 $ 388 $ 132 $ 3,528 Special mention 23 32 — 39 — — — 94 Classified — — 29 — — 35 — 64 Total $ 679 $ 562 $ 1,379 $ 478 $ 33 $ 423 $ 132 $ 3,686 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 804 $ 1,494 $ 1,712 $ 583 $ 358 $ 303 $ 534 $ 5,788 Special mention 111 38 115 — 1 — — 265 Classified — 146 104 81 13 1 — 345 Total $ 915 $ 1,678 $ 1,931 $ 664 $ 372 $ 304 $ 534 $ 6,398 Current period gross charge-offs $ — $ 17.1 $ 4.5 $ 22.7 $ — $ — $ — $ 44.3 Residential Pass $ 330 $ 245 $ 3,392 $ 7,650 $ 778 $ 439 $ 26 $ 12,860 Special mention — — — — — — — — Classified — 1 38 29 4 7 — 79 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 330 $ 246 $ 3,430 $ 7,679 $ 782 $ 446 $ 26 $ 12,983 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Special mention — — — — — — — — Classified — — — — — — — — Total $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 526 $ 740 $ 1,738 $ 127 $ 2 $ — $ 1,460 $ 4,593 Special mention — — 12 — — — — 12 Classified — 1 18 — 41 — — 60 Total $ 526 $ 741 $ 1,768 $ 127 $ 43 $ — $ 1,460 $ 4,665 Current period gross charge-offs $ — $ — $ 1.5 $ — $ — $ — $ — $ 1.5 Other Pass $ 7 $ 1 $ 9 $ 2 $ 12 $ 79 $ 60 $ 170 Special mention — — — — — 1 — 1 Classified 1 — — — — 1 — 2 Total $ 8 $ 1 $ 9 $ 2 $ 12 $ 81 $ 60 $ 173 Current period gross charge-offs $ — $ — $ — $ — $ — $ 0.2 $ — $ 0.2 Total by Risk Category Pass $ 5,777 $ 5,512 $ 10,526 $ 10,037 $ 2,362 $ 3,133 $ 14,625 $ 51,972 Special mention 138 101 174 50 12 2 25 502 Classified 25 236 273 133 59 57 45 828 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 5,940 $ 5,849 $ 10,973 $ 10,220 $ 2,433 $ 3,192 $ 14,695 $ 53,346 Current period gross charge-offs $ 0.1 $ 18.8 $ 6.8 $ 28.7 $ 3.5 $ 2.2 $ 0.8 $ 60.9 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 nine months ended September 30, 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 $ 0.8 $ 3.3 $ 10.0 $ 3.9 $ 0.1 $ 0.2 $ 0.4 $ 18.7 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 $ — $ — $ 5.1 $ — $ — $ 0.1 $ — $ 5.2 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 nine months ended September 30, 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 $ — $ 0.2 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 $ 2.6 $ 3.4 $ 15.1 $ 3.9 $ 0.1 $ 0.4 $ 0.4 $ 25.9 Restructurings for Borrowers Experiencing Financial Difficulty The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ — $ 2 0.1 % Other commercial and industrial — — — 87 87 1.0 Total $ — $ — $ 2 $ 87 $ 89 0.2 % Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ 29 $ 31 1.0 % Other commercial and industrial — 8 — 87 95 1.0 Other CRE - non-owner occupied — — — 56 56 0.9 Construction and land development — 41 — — 41 0.9 Total $ — $ 49 $ 2 $ 172 $ 223 0.4 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ — $ 7 $ 7 0.3 % Other commercial and industrial — 1 — 12 13 0.2 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 20 — — 20 0.5 Other CRE - non-owner occupied — 20 — — 20 0.3 Total $ — $ 44 $ — $ 19 $ 63 0.1 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ — $ 7 $ 9 0.4 % Other commercial and industrial — 24 — 12 36 0.6 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 46 — — 46 1.1 Other CRE - non-owner occupied — 48 — — 48 0.8 Residential — — — 1 1 0.0 Total $ 2 $ 121 $ — $ 20 $ 143 0.3 % The performance of these modified loans is monitored for 12 months following the modification. As of September 30, 2024, modified loans of $136 million were current with contractual payments and $136 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 either through the borrower's reperformance or completion of a loan modification. During the three and nine months ended September 30, 2024, the Company completed modifications of EBO loans with an amortized cost of $106 million and $285 million, respectively. During the three and nine months ended September 30, 2023, the Company completed modifications of EBO loans with an amortized cost of $84 million and $176 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 September 30, 2024, modified EBO loans consisted of $39 million in loans that were current to 89 days delinquent and $9 million in loans 90 days or more 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 90 days or more delinquent. Collateral-Dependent Loans The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: September 30, 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 — 2 2 — — — Other commercial and industrial — 3 3 — 29 29 CRE - owner occupied 12 — 12 43 — 43 Hotel franchise finance 64 — 64 104 — 104 Other CRE - non-owner occupied 345 — 345 136 — 136 Construction and land development 59 — 59 71 — 71 Total $ 480 $ 10 $ 490 $ 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 September 30, 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 September 30, 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 September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 6.5 $ (0.6) $ — $ — $ 5.9 Municipal & nonprofit 14.0 (0.3) — — 13.7 Tech & innovation 45.0 21.2 3.5 — 62.7 Equity fund resources 1.7 0.2 — — 1.9 Other commercial and industrial 84.3 1.9 0.7 (0.4) 85.9 CRE - owner occupied 5.0 0.1 0.3 — 4.8 Hotel franchise finance 39.6 (1.2) — (0.7) 39.1 Other CRE - non-owner occupied 104.5 10.7 21.7 — 93.5 Residential 18.8 0.4 — — 19.2 Residential - EBO — — — — — Construction and land development 29.9 (1.3) 1.5 — 27.1 Other 2.5 0.3 0.1 (0.1) 2.8 Total $ 351.8 $ 31.4 $ 27.8 $ (1.2) $ 356.6 Nine Months Ended September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 0.1 $ — $ — $ 5.9 Municipal & nonprofit 14.7 (1.0) — — 13.7 Tech & innovation 42.1 25.6 5.0 — 62.7 Equity fund resources 1.3 0.6 — — 1.9 Other commercial and industrial 81.4 10.3 6.7 (0.9) 85.9 CRE - owner occupied 6.0 (0.9) 0.3 — 4.8 Hotel franchise finance 33.4 7.9 2.9 (0.7) 39.1 Other CRE - non-owner occupied 96.0 41.8 44.3 — 93.5 Residential 23.1 (3.9) — — 19.2 Residential - EBO — — — — — Construction and land development 30.4 (1.8) 1.5 — 27.1 Other 2.5 0.4 0.2 (0.1) 2.8 Total $ 336.7 $ 79.1 $ 60.9 $ (1.7) $ 356.6 Three Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.2 $ (0.5) $ — $ — $ 4.7 Municipal & nonprofit 16.5 0.2 — — 16.7 Tech & innovation 33.6 (1.6) — — 32.0 Equity fund resources 1.7 — — — 1.7 Other commercial and industrial 51.8 22.8 5.4 (0.3) 69.5 CRE - owner occupied 8.0 (0.3) — — 7.7 Hotel franchise finance 45.7 (5.1) — — 40.6 Other CRE - non-owner occupied 90.1 8.6 3.0 — 95.7 Residential 33.9 (7.9) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 31.7 (2.6) — — 29.1 Other 2.9 0.7 0.1 (0.1) 3.6 Total $ 321.1 $ 14.3 $ 8.5 $ (0.5) $ 327.4 Nine Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (3.7) $ — $ — $ 4.7 Municipal & nonprofit 15.9 0.8 — — 16.7 Tech & innovation 30.8 3.0 1.8 — 32.0 Equity fund resources 6.4 (4.7) — — 1.7 Other commercial and industrial 85.9 (2.0) 18.7 (4.3) 69.5 CRE - owner occupied 7.1 0.6 — — 7.7 Hotel franchise finance 46.9 (6.3) — — 40.6 Other CRE - non-owner occupied 47.4 53.5 5.2 — 95.7 Residential 30.4 (4.4) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 27.4 1.7 — — 29.1 Other 3.1 0.6 0.2 (0.1) 3.6 Total $ 309.7 $ 39.1 $ 25.9 $ (4.5) $ 327.4 Accrued interest receivable of $271 million and $281 million at September 30, 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 $2 million and $4 million as of September 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Balance, beginning of period $ 35.9 $ 41.1 $ 31.6 $ 47.0 Provision for (recovery of) credit losses 1.7 (3.2) 6.0 (9.1) Balance, end of period $ 37.6 $ 37.9 $ 37.6 $ 37.9 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: September 30, 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 $ 7,873 $ — $ 7,873 $ 5.9 $ — $ 5.9 Municipal & nonprofit 1,661 6 1,667 13.1 0.6 13.7 Tech & innovation 3,089 131 3,220 32.6 30.1 62.7 Equity fund resources 906 — 906 1.9 — 1.9 Other commercial and industrial 8,952 121 9,073 85.4 0.5 85.9 CRE - owner occupied 1,651 14 1,665 4.8 — 4.8 Hotel franchise finance 3,623 63 3,686 39.1 — 39.1 Other CRE - non-owner occupied 6,053 345 6,398 86.6 6.9 93.5 Residential 12,983 — 12,983 19.2 — 19.2 Residential EBO 1,037 — 1,037 — — — Construction and land development 4,606 59 4,665 27.1 — 27.1 Other 172 1 173 2.8 — 2.8 Total $ 52,606 $ 740 $ 53,346 $ 318.5 $ 38.1 $ 356.6 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 and nine months ended September 30, 2024, loan purchases totaled $360 million and $875 million, respectively, and consisted primarily of commercial and industrial and residential loans. Loan purchases during the three and nine months ended September 30, 2023 totaled $329 million and $1.4 billion, 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 and nine months ended September 30, 2024 and 2023. In the normal course of business, the Company also repurchases guaranteed or insured loans under the terms of the GNMA MBS program which can be repooled when loans are brought current either through the borrower's reperformance or completion of a loan modification and have demonstrated sustained performance for a period of time. The Company repurchased $109 million and $291 million of such EBO loans during the three and nine months ended September 30, 2024, respectively. Prior to repurchase, these loans are classified as loans eligible for repurchase, which is included as a component of Other assets on the Consolidated Balance Sheet. During the three and nine months ended September 30, 2024, the Company sold loans with a carrying value of approximately $161 million and $550 million, respectively. The Company recognized charge-offs totaling $0.4 million and a net loss of $0.1 million on these loan sales during the three months ended September 30, 2024. During the nine months ended September 30, 2024, the Company recognized charge-offs totaling $1.8 million and a net loss of $5.7 million on these loan sales. As part of the Company's balance sheet repositioning efforts, during the three and nine months ended September 30, 2023, loans with a carrying value of approximately $442 million and $7.7 billion, respectively, were transferred to HFS. A net loss of $21.4 million and $237.2 million for the three and nine months ended September 30, 2023, respectively, was recognized related to these transfers and any subsequent loan sales. Of the loans transferred to HFS, $904 million and $4.7 billion were disposed of during the three and nine months ended September 30, 2023, respectively and approximately $1.4 billion and $2.4 billion were returned to HFI during the three and nine months ended September 30, 2023, respectively.

Mortgage Servicing Rights

Mortgage Servicing Rights	9 Months Ended
	Sep. 30, 2024
Transfers and Servicing [Abstract]
Mortgage Servicing Rights	5. MORTGAGE SERVICING RIGHTS The following table presents changes in the 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Balance, beginning of period $ 1,145 $ 1,007 $ 1,124 $ 1,148 Additions from loans sold with servicing rights retained 223 266 626 653 Carrying value of MSRs sold (258) (112) (655) (611) Change in fair value (62) 98 30 114 Mark to market adjustments — — — 4 Realization of cash flows (37) (26) (114) (75) Balance, end of period $ 1,011 $ 1,233 $ 1,011 $ 1,233 Unpaid principal balance of mortgage loans serviced for others $ 63,773 $ 70,261 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 and nine months ended September 30, 2024, the Company recognized a net gain of $1.5 million and $5.0 million on MSR sales, respectively. The UPB of loans underlying these sales totaled $15.5 billion and $42.8 billion for the three and nine months ended September 30, 2024, respectively. During the three and nine months ended September 30, 2023, the Company recognized a net loss of $0.5 million and $8.5 million on MSR sales, respectively. The UPB of loans underlying these sales totaled $16.0 billion and $44.3 billion for the three and nine months ended September 30, 2023, respectively. As of September 30, 2024 and December 31, 2023, the Company had a remaining receivable balance of $41 million 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 $59.8 million and $196.9 million for the three and nine months ended September 30, 2024 and $56.4 million and $173.3 million for the three and nine months ended September 30, 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 September 30, 2024 and December 31, 2023, net servicing advances totaled $48 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: September 30, 2024 (in millions) Fair value of mortgage servicing rights $ 1,011 Increase (decrease) in fair value resulting from: Interest rate change of 50 basis points Adverse change (84) Favorable change 81 Discount rate change of 50 basis points Increase (21) Decrease 21 Conditional prepayment rate change of 1% Increase (33) Decrease 36 Cost to service change of 10% Increase (12) Decrease 12

Deposits

Deposits	9 Months Ended
	Sep. 30, 2024
Other Liabilities Disclosure [Abstract]
Deposits	6. DEPOSITS The table below summarizes deposits by type: September 30, 2024 December 31, 2023 (in millions) Non-interest bearing deposits $ 24,965 $ 14,520 Interest bearing: Demand accounts 13,846 15,916 Savings and money market accounts 19,575 14,791 Time certificates of deposit ($250,000 or more) 1,567 1,478 Other time deposits (1) 8,087 8,628 Total deposits $ 68,040 $ 55,333 (1) Retail brokered time deposits over $250,000 of $4.9 billion and $5.8 billion as of September 30, 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 September 30, 2024 is as follows: (in millions) 2024 $ 3,911 2025 5,521 2026 211 2027 8 2028 1 Thereafter 2 Total $ 9,654 Brokered deposits provide an additional source of deposits and are placed with the Bank through third-party brokers. At September 30, 2024 and December 31, 2023, the Company held wholesale brokered deposits of $6.0 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 September 30, 2024, the Company had $13.1 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 $26.1 billion and $17.8 billion at September 30, 2024 and December 31, 2023, respectively. Costs related to these deposits are primarily reported as Deposit costs in non-interest expense. Deposit costs include $201.7 million and $123.7 million in deposit related costs on these deposits for the three months ended September 30, 2024 and 2023, respectively, and $500.4 million and $297.1 million, respectively, for the nine months ended September 30, 2024 and 2023.

Other Borrowings

Other Borrowings	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Other Borrowings	7. OTHER BORROWINGS The following table summarizes the Company’s other borrowings by type: September 30, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 1,500 6,200 Repurchase agreements 5 382 Secured borrowings 62 27 Total short-term borrowings $ 1,567 $ 6,784 Long-Term: FHLB advances $ 1,000 $ — Credit linked notes, net 428 446 Total long-term borrowings $ 1,428 $ 446 Total other borrowings $ 2,995 $ 7,230 Short-Term Borrowings Federal Funds Lines of Credit The Company maintains overnight federal fund lines of credit totaling $1.4 billion as of September 30, 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 September 30, 2024 and December 31, 2023, the Company had additional available credit with the FHLB of approximately $11.7 billion and $6.1 billion respectively. The weighted average rate on short-term FHLB advances was 5.21% and 5.67% as of September 30, 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 September 30, 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 overnight customer repurchase agreements. The total carrying value of these repurchase agreements was $5 million and $6 million as of September 30, 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 6.42% and 6.10% as of September 30, 2024 and December 31, 2023, respectively. Long-Term Borrowings FHLB Advances During the three months ended September 30, 2024, the Company entered into long-term advances with the FHLB totaling $1.0 billion and maturing in December 2025. The interest rates on these advances are tied to the daily SOFR rate plus a fixed spread. The Company may redeem the advances at par plus accrued and unpaid interest. The agreements include a make-whole provision upon termination that is based on the interest rate difference between the then current advance interest rate and the interest rate on the terminated advances. After three months from the inception date of the advances, the Company may redeem the advances without incurring a prepayment penalty. The weighted average rate on these long-term FHLB advances was 5.31% as of September 30, 2024. 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: September 30, 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% $ 86 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 172 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 183 2 Total $ 441 $ 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 $1.7 billion and $1.8 billion as of September 30, 2024 and December 31, 2023, respectively. (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 September 30, 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 $3.6 billion and $3.8 billion as of September 30, 2024 and December 31, 2023, respectively.

Qualifying Debt

Qualifying Debt	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Qualifying Debt	8. QUALIFYING DEBT Subordinated Debt The Company's subordinated debt issuances are detailed in the tables below: September 30, 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 $ 5 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 — Total $ 825 $ 5 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 $819 million and $818 million at September 30, 2024 and December 31, 2023, respectively. 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 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	9 Months Ended
	Sep. 30, 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 one 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 and nine months ended September 30, 2024 was $0.3 million and $46.9 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 and nine months ended September 30, 2024, the Company recognized $9.1 million and $32.6 million, in stock-based compensation expense related to employee and WAL director stock grants, compared to $7.5 million and $25.1 million for the three and nine months ended September 30, 2023. Performance Stock Units The Company grants performance stock units to members of its executive management that do not vest unless the Company achieves certain performance measures over a three-year performance period. For the 2024 award, the performance measures are based on the Company’s relative return on equity and maintenance of a target CET1 ratio, and relative TSR performance. For the 2023 and 2022 awards, the performance measures are based on achievement of a specified cumulative EPS target and a TSR performance factor. The number of shares issued will vary based on the performance measures that are 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 and nine months ended September 30, 2024, the Company recognized stock-based compensation expense of $0.9 million and $2.5 million, respectively, for such units. During the three and nine months ended September 30, 2023, the Company recognized stock-based compensation expense of $1.4 million and $0.3 million (which includes a $2.5 million net reversal of expense recognized in the first quarter 2023 on unvested performance stock units due to revised performance expectations), respectively. 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 and nine months ended September 30, 2024, the Company recognized compensation expense of $0.4 million and $0.8 million related to these awards, respectively. There were no such units outstanding during the three and nine months ended September 30, 2023. Deferred Stock Units In 2024, the Company began granting deferred stock unit awards to certain members of its management team, which are intended to provide retirement benefits on an unfunded, unsecured basis. These awards can be settled in either stock or cash, at the Company's option. Participants are credited dividend equivalent units for any cash dividends paid with respect to the shares of stock underlying the stock units. These awards vest on the later of (i) the one-year anniversary of the grant date and (ii) the participant's satisfaction of age- and service-related eligibility criteria for a qualified retirement. The aggregate grant date fair value for these deferred stock unit awards granted during the three and nine months ended September 30, 2024 was $0.1 million and $5.7 million, respectively. Stock compensation expense related to these deferred stock units is included in Salaries and employee benefits in the Consolidated Income Statement. For the three and nine months ended September 30, 2024, the Company recognized $1.4 million and $1.9 million, respectively, in stock-based compensation expense related to these stock grants. There were no such units outstanding during the three and nine months ended September 30, 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 and nine months ended September 30, 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 and $9.6 million, respectively. Cash Dividend on Common Shares During the three and nine months ended September 30, 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 and $122.2 million, respectively. During the three and nine months ended September 30, 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 and $118.2 million, respectively. Treasury Shares

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 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 September 30, 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, June 30, 2024 $ (560.9) $ (0.3) $ 1.8 $ 1.2 $ (558.2) Other comprehensive income (loss) before reclassifications 183.7 (0.1) (0.3) — 183.3 Amounts reclassified from AOCI (6.6) — — — (6.6) Net current-period other comprehensive income (loss) 177.1 (0.1) (0.3) — 176.7 Balance, September 30, 2024 $ (383.8) $ (0.4) $ 1.5 $ 1.2 $ (381.5) Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Other comprehensive loss before reclassifications (120.2) — (1.2) — (121.4) Amounts reclassified from AOCI (0.4) — — — (0.4) Net current-period other comprehensive loss (120.6) — (1.2) — (121.8) Balance, September 30, 2023 $ (738.9) $ (0.3) $ 5.7 $ 1.2 $ (732.3) Nine Months Ended September 30, 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 income (loss) before reclassifications 140.5 (0.1) (1.3) — 139.1 Amounts reclassified from AOCI (7.7) — — — (7.7) Net current-period other comprehensive income (loss) 132.8 (0.1) (1.3) — 131.4 Balance, September 30, 2024 $ (383.8) $ (0.4) $ 1.5 $ 1.2 $ (381.5) Balance, December 31, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive (loss) income before reclassifications (94.3) — 2.7 1.2 (90.4) Amounts reclassified from AOCI 19.1 — — — 19.1 Net current-period other comprehensive (loss) income (75.2) — 2.7 1.2 (71.3) Balance, September 30, 2023 $ (738.9) $ (0.3) $ 5.7 $ 1.2 $ (732.3)

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 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 due 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. The terminated last-of-layer hedge basis adjustment was fully amortized as of September 30, 2024. 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 purchase and sale commitments, interest rate futures and interest rate contracts. 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 September 30, 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: September 30, 2024 December 31, 2023 Carrying Value of Hedged Assets Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 4,836 $ 38 $ 3,875 $ (6) (1) Included in the carrying value of the hedged assets. (2) Included portfolio layer method derivative instruments with $4.5 billion and $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $9.4 billion and $6.7 billion) as of September 30, 2024 and December 31, 2023, respectively. The cumulative basis adjustment included in the carrying value of these hedged items totaled $44.4 million and $19.0 million as of September 30, 2024 and December 31, 2023, respectively. 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 September 30, 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 $ (31.4) $ 31.2 $ 76.5 $ (76.0) Nine Months Ended September 30, 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 $ (114.6) $ 115.1 $ 111.2 $ (110.7) 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 and $8.9 million, respectively, in interest income related to the amortization of the cumulative basis adjustment on its discontinued last-of-layer hedges during the three and nine months ended September 30, 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 September 30, 2024, December 31, 2023, and September 30, 2023. The change in the notional amounts of these derivatives from September 30, 2023 to September 30, 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. September 30, 2024 December 31, 2023 September 30, 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 $ 4,852 $ 14 $ 51 $ 3,895 $ 19 $ 24 $ 3,899 $ 128 $ — Total $ 4,852 $ 14 $ 51 $ 3,895 $ 19 $ 24 $ 3,899 $ 128 $ — Derivatives not designated as hedging instruments: Foreign currency contracts $ 101 $ 1 $ — $ 135 $ 1 $ 1 $ 74 $ 1 $ — Forward contracts 17,889 20 38 13,170 27 55 9,653 43 21 Futures contracts (1) 7,400 — — 11,030 — — 13,845 — — Interest rate lock commitments 2,843 13 2 1,822 18 — 1,761 3 6 Interest rate contracts 5,317 28 29 3,628 19 20 3,187 20 20 Risk participation agreements 96 — — 72 — — 44 — — Equity warrants 56 21 — 55 4 — 40 4 — Total $ 33,702 $ 83 $ 69 $ 29,912 $ 69 $ 76 $ 28,604 $ 71 $ 47 Margin — 280 (4) — 202 (9) — 66 25 Total, including margin $ 33,702 $ 363 $ 65 $ 29,912 $ 271 $ 67 $ 28,604 $ 137 $ 72 (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. 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: September 30, 2024 December 31, 2023 September 30, 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 contracts 20 — 20 27 — 27 43 — 43 Interest rate contracts 18 — 18 31 — 31 148 — 148 Margin 280 — 280 202 — 202 66 — 66 Netting — (94) (94) — (67) (67) — (43) (43) $ 319 $ (94) $ 225 $ 260 $ (67) $ 193 $ 257 $ (43) $ 214 Liabilities Foreign currency contracts $ — $ — $ — $ (1) $ — $ (1) $ — $ — $ — Forward contracts (37) — (37) (55) — (55) (21) — (21) Interest rate contracts (70) — (70) (31) — (31) — — — Margin 4 — 4 9 — 9 (25) — (25) Netting — 94 94 — 67 67 — 43 43 $ (103) $ 94 $ (9) $ (78) $ 67 $ (11) $ (46) $ 43 $ (3) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ — $ — $ — $ 1 $ — $ 1 $ 1 $ — $ 1 Interest rate lock commitments 13 — 13 18 — 18 3 — 3 Interest rate contracts 24 — 24 7 — 7 — — — Equity warrants 21 — 21 4 — 4 4 — 4 $ 58 $ — $ 58 $ 30 $ — $ 30 $ 8 $ — $ 8 Liabilities Forward contracts $ (1) $ — $ (1) $ — $ — $ — $ — $ — $ — Interest rate lock commitments (2) — (2) — — — (6) — (6) Interest rate contracts (10) — (10) (13) — (13) (20) — (20) $ (13) $ — $ (13) $ (13) $ — $ (13) $ (26) $ — $ (26) Total derivatives and margin Assets $ 377 $ (94) $ 283 $ 290 $ (67) $ 223 $ 265 $ (43) $ 222 Liabilities $ (116) $ 94 $ (22) $ (91) $ 67 $ (24) $ (72) $ 43 $ (29) The following table summarizes the net gain (loss) on derivatives included in the non-interest income line items below: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ 2.6 $ (5.2) $ (7.8) $ (4.9) Forward contracts (87.3) 68.7 (61.3) 87.5 Interest rate contracts 6.7 (8.4) 3.8 (11.8) Other contracts (1.1) (0.3) (0.2) 1.5 Net (loss) gain on derivatives $ (79.1) $ 54.8 $ (65.5) $ 72.3 Net loan servicing revenue: Forward contracts $ 17.9 $ (19.2) $ (9.6) $ (34.0) Futures contracts (7.0) (2.4) 7.4 12.3 Interest rate contracts 42.2 (82.4) (10.8) (100.0) Net gain (loss) on derivatives $ 53.1 $ (104.0) $ (13.0) $ (121.7) Counterparty Credit Risk

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions, except per share amounts) Weighted average shares - basic 108.7 108.3 108.6 108.3 Dilutive effect of stock awards 0.8 0.2 0.6 0.1 Weighted average shares - diluted 109.5 108.5 109.2 108.4 Net income available to common stockholders $ 196.6 $ 213.4 $ 561.2 $ 564.9 Earnings per Common Share: Basic $ 1.81 $ 1.97 $ 5.17 $ 5.22 Diluted 1.80 1.97 5.14 5.21 Antidilutive restricted stock outstanding — — — 0.1

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	13. INCOME TAXES The Company's effective tax rate was 20.7% and 22.1% for the three months ended September 30, 2024 and 2023, res pectively, and 22.0% and 20.5% for the nine months ended September 30, 2024 and 2023, respectively . The decrease in the effective tax rate for the three months ended September 30, 2024 compared to the same period in 2023 was primarily due to a decrease in pre-tax book income. The increase in the effective tax rate for the nine months ended September 30, 2024 compared to the same period in 2023 was primarily due to a decrease in expected investment tax credit benefits, an increase in nondeductible insurance premiums, and shortfalls from stock compensation expense during 2024. As of September 30, 2024, the net DTA balance totaled $254 million, a decrease of $33 million from $287 million at December 31, 2023. This overall decrease in the net DTA was primarily the result of an increase in the fair market value of AFS securities, partially offset by an increase in credit carryovers and state net operating losses. Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $254 million at September 30, 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 September 30, 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 $560 million and $573 million as of September 30, 2024 and December 31, 2023, respectively. Unfunded LIHTC and renewable energy obligations are included in Other liabilities on the Consolidated Balance Sheet and totaled $305 million and $322 million as of September 30, 2024 and December 31, 2023, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 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: September 30, 2024 December 31, 2023 (in millions) Commitments to extend credit, including unsecured loan commitments of $916 at September 30, 2024 and $989 at December 31, 2023 $ 13,299 $ 13,291 Credit card commitments and financial guarantees 495 418 Letters of credit, including unsecured letters of credit of $2 at September 30, 2024 and $4 at December 31, 2023 289 222 Total $ 14,083 $ 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 fully drawn, 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 $38 million and $32 million as of September 30, 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 $20 million as of September 30, 2024 and $32 million as of December 31, 2023. 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 42% and 38% of the Company's HFI loan portfolio as of September 30, 2024 and December 31, 2023, respectively. The Company's loan portfolio includes significant credit exposure to the CRE market. As of September 30, 2024 and December 31, 2023, CRE related loans accounted for approximately 31% and 33% of total loans, respectively. Approximately 16% of CRE loans, excluding construction and land loans, were owner-occupied as of September 30, 2024 and December 31, 2023. No borrower relationships at both the commitment and funded loan level exceeded 5% of total loans HFI as of September 30, 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	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Unrealized (losses) gains $ (0.4) $ (1.6) $ (1.8) $ 3.6 Changes included in OCI, net of tax (0.3) (1.2) (1.3) 2.7 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 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, which may be 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 September 30, 2024 (in millions) Assets: Available-for-sale debt securities Residential MBS issued by GSEs $ — $ 5,629 $ — $ 5,629 U.S. Treasury securities 5,600 — — 5,600 Private label residential MBS — 1,042 — 1,042 Tax-exempt — 870 — 870 Commercial MBS issued by GSEs — 653 — 653 CLO — 508 — 508 Corporate debt securities — 379 — 379 Other 2 67 — 69 Total AFS debt securities $ 5,602 $ 9,148 $ — $ 14,750 Equity securities Preferred stock $ 91 $ — $ — $ 91 CRA investments 26 — — 26 Total equity securities $ 117 $ — $ — $ 117 Loans HFS (2) $ — $ 2,290 $ 2 $ 2,292 Mortgage servicing rights — — 1,011 1,011 Derivative assets (1) — 63 34 97 Liabilities: Junior subordinated debt (3) $ — $ — $ 65 $ 65 Derivative liabilities (1) — 118 2 120 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $38 million as of September 30, 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 $280 million and $(4) 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 decreased 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Beginning balance $ (64.2) $ (57.3) $ (62.8) $ (62.5) Change in fair value (1) (0.4) (1.6) (1.8) 3.6 Ending balance $ (64.6) $ (58.9) $ (64.6) $ (58.9) (1) Unrealized (losses) gains attributable to changes in the fair value of junior subordinated debt are recorded in OCI, net of tax, and totaled $(0.3) million and $(1.2) million for three months ended September 30, 2024 and 2023, respectively, and $(1.3) million and $2.7 million for the nine months ended September 30, 2024 and 2023, respectively. The significant unobservable inputs used in the fair value measurements of these Level 3 liabilities were as follows: September 30, 2024 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 65 Discounted cash flow Implied credit rating of the Company 7.75 % 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 September 30, 2024 and December 31, 2023 was the implied credit risk for the Company. As of September 30, 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 September 30, 2024, the Company estimates the discount rate at 7.75%, which represents an implied credit spread of 3.16% plus three-month SOFR (4.59%). 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 September 30, 2024 Nine Months Ended September 30, 2024 MSRs IRLCs (1) MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,145 $ 8 $ 1,124 $ 18 Purchases and additions 223 5,387 626 14,024 Sales and payments (258) — (655) — Settlement of IRLCs upon acquisition or origination of loans HFS — (5,395) — (14,042) Change in fair value (62) 10 30 10 Realization of cash flows (37) — (114) — Balance, end of period $ 1,011 $ 10 $ 1,011 $ 10 Changes in unrealized gains for the period (2) $ (61) $ 10 $ (25) $ 10 Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 MSRs IRLCs (1) MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,007 $ 2 $ 1,148 $ 2 Purchases and additions 266 4,616 653 11,772 Sales and payments (112) — (611) — Settlement of IRLCs upon acquisition or origination of loans HFS — (4,619) — (11,773) Change in fair value 98 (2) 114 (4) Mark to market adjustments — — 4 — Realization of cash flows (26) — (75) — Balance, end of period $ 1,233 $ (3) $ 1,233 $ (3) Changes in unrealized gains for the period (2) $ 97 $ (3) $ 128 $ (3) (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: September 30, 2024 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) 37 - 337 267 Conditional prepayment rate (1) 9.1% - 24.7% 18.1 % Recapture rate 20.0% - 20.0% 20.0 % Servicing fee rate (in basis points) 25.0 - 56.5 36.2 Cost to service $75 - $95 $ 83 IRLCs: Servicing fee multiple 2.8 - 6.6 4.2 Pull-through rate 69% - 100% 83 % 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: September 30, 2024 December 31, 2023 Fair value UPB Difference Fair value UPB Difference (in millions) Loans HFS: Current through 89 days delinquent $ 2,292 $ 2,210 $ 82 $ 1,379 $ 1,319 $ 60 90 days or more delinquent — — — 1 2 (1) Total $ 2,292 $ 2,210 $ 82 $ 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 September 30, 2024: Loans HFI $ 481 $ — $ — $ 481 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: September 30, 2024 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 481 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 $481 million and $379 million at September 30, 2024 and December 31, 2023, respectively, net of a specific ACL of $9 million and $10 million at September 30, 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 September 30, 2024 and December 31, 2023. Fair Value of Financial Instruments The estimated fair value of the Company’s financial instruments is as follows: September 30, 2024 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,525 $ — $ 1,371 $ — $ 1,371 AFS 14,750 5,602 9,148 — 14,750 Equity 117 117 — — 117 Derivative assets (1) 97 — 63 34 97 Loans HFS 2,327 — 2,303 23 2,326 Loans HFI, net 52,989 — — 51,739 51,739 Mortgage servicing rights 1,011 — — 1,011 1,011 Accrued interest receivable 367 — 367 — 367 Financial liabilities: Deposits $ 68,040 $ — $ 68,099 $ — $ 68,099 Other borrowings 2,995 — 2,966 — 2,966 Qualifying debt 898 — 773 78 851 Derivative liabilities (1) 120 — 118 2 120 Accrued interest payable 167 — 167 — 167 (1) Derivative assets and liabilities exclude margin of $280 million and $(4) 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 22 88 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 earnings 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 September 30, 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 September 30, 2024 and December 31, 2023.

Segments

Segments	9 Months Ended
	Sep. 30, 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 assignment and allocation methodologies used in the segment reporting process discussed above change from time to time as systems are enhanced, methods for evaluating segment performance or product lines change or as business segments are realigned. The following is a summary of operating segment information for the periods indicated: Balance Sheet: Consolidated Company Commercial Consumer Related Corporate & Other At September 30, 2024: (in millions) Assets: Cash, cash equivalents, and investment securities $ 18,974 $ 15 $ — $ 18,959 Loans HFS 2,327 — 2,327 — Loans HFI, net of deferred fees and costs 53,346 31,518 21,828 — Less: allowance for credit losses (357) (298) (59) — Net loans HFI 52,989 31,220 21,769 — Goodwill and other intangible assets, net 661 291 370 — Other assets 5,129 398 1,814 2,917 Total assets $ 80,080 $ 31,924 $ 26,280 $ 21,876 Liabilities: Deposits $ 68,040 $ 24,335 $ 37,183 $ 6,522 Borrowings and qualifying debt 3,893 5 62 3,826 Other liabilities 1,470 87 525 858 Total liabilities 73,403 24,427 37,770 11,206 Allocated equity: 6,677 2,734 1,844 2,099 Total liabilities and stockholders' equity $ 80,080 $ 27,161 $ 39,614 $ 13,305 Excess funds provided (used) $ — $ (4,763) $ 13,334 $ (8,571) Income Statement: Three Months Ended September 30, 2024: (in millions) Net interest income (expense) $ 696.9 $ 286.2 $ 433.6 $ (22.9) Provision for credit losses 33.6 27.7 5.4 0.5 Net interest income (expense) after provision for credit losses 663.3 258.5 428.2 (23.4) Non-interest income 126.2 31.3 64.0 30.9 Non-interest expense 537.4 150.5 378.7 8.2 Income (loss) before provision for income taxes 252.1 139.3 113.5 (0.7) Income tax expense 52.3 28.8 19.0 4.5 Net income (loss) $ 199.8 $ 110.5 $ 94.5 $ (5.2) Nine Months Ended September 30, 2024: (in millions) Net interest income $ 1,952.4 $ 867.3 $ 1,065.2 $ 19.9 Provision for credit losses 85.9 79.1 6.0 0.8 Net interest income after provision for credit losses 1,866.5 788.2 1,059.2 19.1 Non-interest income 371.3 80.5 249.6 41.2 Non-interest expense 1,506.0 457.3 1,005.7 43.0 Income before provision for income taxes 731.8 411.4 303.1 17.3 Income tax expense 161.0 90.5 62.3 8.2 Net income $ 570.8 $ 320.9 $ 240.8 $ 9.1 Balance Sheet: Consolidated Company Commercial Consumer Related Corporate At December 31, 2023: (in millions) Assets: Cash, cash equivalents, and investment securities $ 14,288 $ 13 $ 125 $ 14,150 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 — Goodwill and other intangible assets, net 669 292 377 — Other assets 4,543 398 1,826 2,319 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 September 30, 2023: (in millions) Net interest income $ 587.0 $ 331.5 $ 243.8 $ 11.7 Provision for (recovery of) credit losses 12.1 14.1 (3.0) 1.0 Net interest income after provision for credit losses 574.9 317.4 246.8 10.7 Non-interest income 129.2 25.9 89.4 13.9 Non-interest expense 426.2 147.2 267.3 11.7 Income before provision for income taxes 277.9 196.1 68.9 12.9 Income tax expense (benefit) 61.3 64.9 28.8 (32.4) Net income $ 216.6 $ 131.2 $ 40.1 $ 45.3 Nine Months Ended September 30, 2023: (in millions) Net interest income $ 1,747.2 $ 1,077.5 $ 647.8 $ 21.9 Provision for credit losses 53.3 29.7 0.4 23.2 Net interest income (expense) after provision for credit losses 1,693.9 1,047.8 647.4 (1.3) Non-interest income 190.2 (40.1) 226.6 3.7 Non-interest expense 1,161.5 430.9 691.6 39.0 Income (loss) before provision for income taxes 722.6 576.8 182.4 (36.6) Income tax expense (benefit) 148.1 125.1 39.4 (16.4) Net income (loss) $ 574.5 $ 451.7 $ 143.0 $ (20.2)

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income	$ 199.8	$ 216.6	$ 570.8	$ 574.5

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 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)	9 Months Ended
	Sep. 30, 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 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 September 30, 2024 and for the three and nine months ended September 30, 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. As the amendments in this update relate entirely to enhanced disclosure requirements, adoption of this guidance will not have an impact on the Company's financial position or results of operations. Upon adoption, the Company expects to disclose additional expense detail within its segment disclosures. 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 September 30, 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)	9 Months Ended
	Sep. 30, 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: September 30, 2024 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Tax-exempt $ 1,346 $ 3 $ (125) $ 1,224 Private label residential MBS 179 — (32) 147 Total HTM securities $ 1,525 $ 3 $ (157) $ 1,371 Available-for-sale debt securities Residential MBS issued by GSEs $ 5,887 $ 58 $ (316) $ 5,629 U.S. Treasury securities 5,597 4 (1) 5,600 Private label residential MBS 1,205 1 (164) 1,042 Tax-exempt 930 — (60) 870 Commercial MBS issued by GSEs 648 13 (8) 653 CLO 509 — (1) 508 Corporate debt securities 407 — (28) 379 Other 75 1 (7) 69 Total AFS debt securities $ 15,258 $ 77 $ (585) $ 14,750 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: September 30, 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 Residential MBS issued by GSEs $ 1 $ 150 $ 315 $ 1,568 $ 316 $ 1,718 U.S. Treasury securities 1 2,210 — — 1 2,210 Private label residential MBS — — 164 993 164 993 Tax-exempt — — 60 835 60 835 Commercial MBS issued by GSEs 7 92 1 17 8 109 CLO 1 338 — — 1 338 Corporate debt securities (1) — — 28 375 28 375 Other 3 29 4 26 7 55 Total AFS securities $ 13 $ 2,819 $ 572 $ 3,814 $ 585 $ 6,633 (1) Includes securities with an ACL that have a fair value of $8 million and unrealized losses of $1 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 September 30, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 0.8 $ (0.4) $ — $ — $ 0.4 Nine Months Ended September 30, 2024 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 1.4 $ (1.0) $ — $ — $ 0.4 Three Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ 4.4 $ 0.3 $ — $ — $ 4.7 Nine Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Available for sale securities Corporate debt securities $ — $ 21.8 $ (17.1) $ — $ 4.7
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 September 30, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 8.7 $ 0.9 $ — $ — $ 9.6 Nine Months Ended September 30, 2024 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 7.8 $ 1.8 $ — $ — $ 9.6 Three Months Ended September 30, 2023 Balance, Recovery of Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 6.0 $ 0.7 $ — $ — $ 6.7 Nine Months Ended September 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 1.5 $ — $ — $ 6.7
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: September 30, 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 $ — $ — $ — $ — $ — $ — $ 1,346 $ 1,346 Private label residential MBS — — — — — — 179 179 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,525 $ 1,525 Available-for-sale debt securities Residential MBS issued by GSEs $ — $ 5,629 $ — $ — $ — $ — $ — $ 5,629 U.S. Treasury securities — 5,600 — — — — — 5,600 Private label residential MBS 1,015 — 27 — — — — 1,042 Tax-exempt 9 15 352 394 — — 100 870 Commercial MBS issued by GSEs — 653 — — — — — 653 CLO 24 — 484 — — — — 508 Corporate debt securities — — — 78 222 79 — 379 Other — 2 8 2 38 1 18 69 Total AFS securities (1) $ 1,048 $ 11,899 $ 871 $ 474 $ 260 $ 80 $ 118 $ 14,750 Equity securities Preferred stock $ — $ — $ — $ — $ 51 $ 29 $ 11 $ 91 CRA investments — 26 — — — — — 26 Total equity securities (1) $ — $ 26 $ — $ — $ 51 $ 29 $ 11 $ 117 (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 September 30, 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. September 30, 2024 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 34 $ 34 After one year through five years 7 7 After five years through ten years 97 89 After ten years 1,208 1,094 Mortgage-backed securities 179 147 Total HTM securities $ 1,525 $ 1,371 Available-for-sale Due in one year or less $ 5,079 $ 5,081 After one year through five years 697 692 After five years through ten years 567 544 After ten years 1,175 1,109 Mortgage-backed securities 7,740 7,324 Total AFS securities $ 15,258 $ 14,750
Gains and Losses on Sales of Investment Securities	The following table presents gross gains and losses on sales of investment securities: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Available-for-sale securities Gross gains $ 8.8 $ 0.5 $ 12.4 $ 4.0 Gross losses — — (2.2) (29.6) Net gains (losses) on AFS securities $ 8.8 $ 0.5 $ 10.2 $ (25.6) Equity securities Gross gains $ — $ — $ — $ — Gross losses — (0.4) — (0.4) Net losses on equity securities $ — $ (0.4) $ — $ (0.4)

Loans Held For Sale (Tables)

Loans Held For Sale (Tables)	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Summary of Loans HFS by Type	The following is a summary of loans HFS by type: September 30, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 816 498 Total government-insured or guaranteed 816 500 Agency-conforming 1,497 899 Non-agency 14 3 Total loans HFS $ 2,327 $ 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 222.5 $ 265.8 $ 625.9 $ 653.0 Net proceeds from sale of loans (1) (116.4) (274.7) (467.7) (612.7) Provision for and change in estimate of liability for losses under representations and warranties, net — 0.1 4.2 2.8 Change in fair value 4.0 (10.1) (1.3) (13.2) Change in fair value of derivatives: Unrealized (loss) gain on derivatives (2.9) 10.3 14.2 25.3 Realized (loss) gain on derivatives (76.3) 44.5 (79.7) 47.0 Total change in fair value of derivatives (79.2) 54.8 (65.5) 72.3 Net gain on residential mortgage loans HFS $ 30.9 $ 35.9 $ 95.6 $ 102.2 Loan acquisition and origination fees 15.4 16.1 42.8 43.5 Net gain on loan origination and sale activities $ 46.3 $ 52.0 $ 138.4 $ 145.7
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: September 30, 2024 December 31, 2023 (in millions) Government-insured or guaranteed: EBO (1) $ — $ 2 Non-EBO 816 498 Total government-insured or guaranteed 816 500 Agency-conforming 1,497 899 Non-agency 14 3 Total loans HFS $ 2,327 $ 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Mortgage servicing rights capitalized upon sale of loans $ 222.5 $ 265.8 $ 625.9 $ 653.0 Net proceeds from sale of loans (1) (116.4) (274.7) (467.7) (612.7) Provision for and change in estimate of liability for losses under representations and warranties, net — 0.1 4.2 2.8 Change in fair value 4.0 (10.1) (1.3) (13.2) Change in fair value of derivatives: Unrealized (loss) gain on derivatives (2.9) 10.3 14.2 25.3 Realized (loss) gain on derivatives (76.3) 44.5 (79.7) 47.0 Total change in fair value of derivatives (79.2) 54.8 (65.5) 72.3 Net gain on residential mortgage loans HFS $ 30.9 $ 35.9 $ 95.6 $ 102.2 Loan acquisition and origination fees 15.4 16.1 42.8 43.5 Net gain on loan origination and sale activities $ 46.3 $ 52.0 $ 138.4 $ 145.7

Loans, Leases and Allowance f_2

Loans, Leases and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 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: September 30, 2024 December 31, 2023 (in millions) Warehouse lending $ 7,873 $ 6,618 Municipal & nonprofit 1,667 1,554 Tech & innovation 3,220 2,808 Equity fund resources 906 845 Other commercial and industrial 9,073 7,452 CRE - owner occupied 1,665 1,658 Hotel franchise finance 3,686 3,855 Other CRE - non-owner occupied 6,398 5,974 Residential 12,983 13,287 Residential - EBO 1,037 1,223 Construction and land development 4,665 4,862 Other 173 161 Total loans HFI 53,346 50,297 Allowance for credit losses (357) (337) Total loans HFI, net of allowance $ 52,989 $ 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: September 30, 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 $ — $ 6 $ 6 $ — Tech & innovation 33 31 64 — Equity fund resources — — — 1 Other commercial and industrial 11 1 12 3 CRE - owner occupied 5 1 6 — Other CRE - non-owner occupied 146 17 163 — Residential — 79 79 — Residential - EBO — — — 313 Construction and land development 18 — 18 — Other 1 — 1 Total $ 214 $ 135 $ 349 $ 317 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: September 30, 2024 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 7,873 $ — $ — $ — $ — $ — $ 7,873 Municipal & nonprofit 1,661 — — — — 6 1,667 Tech & innovation 3,156 — — — — 64 3,220 Equity fund resources 905 — — 1 1 — 906 Other commercial and industrial 9,053 4 1 3 8 12 9,073 CRE - owner occupied 1,659 — — — — 6 1,665 Hotel franchise finance 3,651 35 — — 35 — 3,686 Other CRE - non-owner occupied 6,235 — — — — 163 6,398 Residential 12,835 55 14 — 69 79 12,983 Residential - EBO 521 124 79 313 516 — 1,037 Construction and land development 4,647 — — — — 18 4,665 Other 171 1 — — 1 1 173 Total loans $ 52,367 $ 219 $ 94 $ 317 $ 630 $ 349 $ 53,346 December 31, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total Nonaccrual Total (in millions) Warehouse lending $ 6,618 $ — $ — $ — $ — $ — $ 6,618 Municipal & nonprofit 1,554 — — — — 6 1,554 Tech & innovation 2,808 — — — — 33 2,808 Equity fund resources 845 — — — — — 845 Other commercial and industrial 7,439 13 — — 13 53 7,452 CRE - owner occupied 1,627 — 31 — 31 9 1,658 Hotel franchise finance 3,824 15 16 — 31 — 3,855 Other CRE - non-owner occupied 5,974 — — — — 83 5,974 Residential 13,199 68 20 — 88 70 13,287 Residential - EBO 545 173 106 399 678 — 1,223 Construction and land development 4,820 — — 42 42 19 4,862 Other 160 1 — — 1 — 161 Total loans $ 49,413 $ 270 $ 173 $ 441 $ 884 $ 273 $ 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Warehouse lending Pass $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,714 $ 7,863 Special mention — — — — — — 10 10 Classified — — — — — — — — Total $ 56 $ 490 $ 314 $ 5 $ 284 $ — $ 6,724 $ 7,873 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 98 $ 111 $ 246 $ 169 $ 162 $ 858 $ — $ 1,644 Special mention — — 7 — 11 — — 18 Classified — — — — — 5 — 5 Total $ 98 $ 111 $ 253 $ 169 $ 173 $ 863 $ — $ 1,667 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 986 $ 571 $ 376 $ 132 $ — $ 68 $ 867 $ 3,000 Special mention 4 31 29 11 — — 13 88 Classified 11 1 72 3 — — 45 132 Total $ 1,001 $ 603 $ 477 $ 146 $ — $ 68 $ 925 $ 3,220 Current period gross charge-offs $ — $ 1.5 $ — $ — $ 3.5 $ — $ — $ 5.0 Equity fund resources Pass $ 21 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 905 Special mention — — — — — — — — Classified 1 — — — — — — 1 Total $ 22 $ 93 $ 99 $ 38 $ 3 $ — $ 651 $ 906 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 2,143 $ 1,048 $ 914 $ 379 $ 110 $ 184 $ 4,163 $ 8,941 Special mention — — 6 — — 1 2 9 Classified 12 87 2 18 1 3 — 123 Total $ 2,155 $ 1,135 $ 922 $ 397 $ 111 $ 188 $ 4,165 $ 9,073 Current period gross charge-offs $ — $ 0.2 $ 0.8 $ 4.6 $ — $ 0.3 $ 0.8 $ 6.7 CRE - owner occupied Pass $ 149 $ 166 $ 361 $ 307 $ 149 $ 493 $ 18 $ 1,643 Special mention — — 5 — — — — 5 Classified — — 10 2 — 5 — 17 Total $ 149 $ 166 $ 376 $ 309 $ 149 $ 498 $ 18 $ 1,665 Current period gross charge-offs $ 0.1 $ — $ — $ — $ — $ 0.2 $ — $ 0.3 Hotel franchise finance Pass $ 656 $ 530 $ 1,350 $ 439 $ 33 $ 388 $ 132 $ 3,528 Special mention 23 32 — 39 — — — 94 Classified — — 29 — — 35 — 64 Total $ 679 $ 562 $ 1,379 $ 478 $ 33 $ 423 $ 132 $ 3,686 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 nine months ended September 30, 2024 2024 2023 2022 2021 2020 Prior (in millions) Other CRE - non-owner occupied Pass $ 804 $ 1,494 $ 1,712 $ 583 $ 358 $ 303 $ 534 $ 5,788 Special mention 111 38 115 — 1 — — 265 Classified — 146 104 81 13 1 — 345 Total $ 915 $ 1,678 $ 1,931 $ 664 $ 372 $ 304 $ 534 $ 6,398 Current period gross charge-offs $ — $ 17.1 $ 4.5 $ 22.7 $ — $ — $ — $ 44.3 Residential Pass $ 330 $ 245 $ 3,392 $ 7,650 $ 778 $ 439 $ 26 $ 12,860 Special mention — — — — — — — — Classified — 1 38 29 4 7 — 79 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 330 $ 246 $ 3,430 $ 7,679 $ 782 $ 446 $ 26 $ 12,983 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Special mention — — — — — — — — Classified — — — — — — — — Total $ 1 $ 23 $ 15 $ 206 $ 471 $ 321 $ — $ 1,037 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 526 $ 740 $ 1,738 $ 127 $ 2 $ — $ 1,460 $ 4,593 Special mention — — 12 — — — — 12 Classified — 1 18 — 41 — — 60 Total $ 526 $ 741 $ 1,768 $ 127 $ 43 $ — $ 1,460 $ 4,665 Current period gross charge-offs $ — $ — $ 1.5 $ — $ — $ — $ — $ 1.5 Other Pass $ 7 $ 1 $ 9 $ 2 $ 12 $ 79 $ 60 $ 170 Special mention — — — — — 1 — 1 Classified 1 — — — — 1 — 2 Total $ 8 $ 1 $ 9 $ 2 $ 12 $ 81 $ 60 $ 173 Current period gross charge-offs $ — $ — $ — $ — $ — $ 0.2 $ — $ 0.2 Total by Risk Category Pass $ 5,777 $ 5,512 $ 10,526 $ 10,037 $ 2,362 $ 3,133 $ 14,625 $ 51,972 Special mention 138 101 174 50 12 2 25 502 Classified 25 236 273 133 59 57 45 828 Cumulative fair value hedging adjustment — — — — — — — 44 Total $ 5,940 $ 5,849 $ 10,973 $ 10,220 $ 2,433 $ 3,192 $ 14,695 $ 53,346 Current period gross charge-offs $ 0.1 $ 18.8 $ 6.8 $ 28.7 $ 3.5 $ 2.2 $ 0.8 $ 60.9 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 nine months ended September 30, 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 $ 0.8 $ 3.3 $ 10.0 $ 3.9 $ 0.1 $ 0.2 $ 0.4 $ 18.7 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 $ — $ — $ 5.1 $ — $ — $ 0.1 $ — $ 5.2 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 nine months ended September 30, 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 $ — $ 0.2 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 $ 2.6 $ 3.4 $ 15.1 $ 3.9 $ 0.1 $ 0.4 $ 0.4 $ 25.9
Amortized Cost Basis of Loans Modified	The following tables present loan modifications during the period to borrowers experiencing financial difficulty: Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ — $ 2 0.1 % Other commercial and industrial — — — 87 87 1.0 Total $ — $ — $ 2 $ 87 $ 89 0.2 % Amortized Cost Basis at September 30, 2024 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ — $ — $ 2 $ 29 $ 31 1.0 % Other commercial and industrial — 8 — 87 95 1.0 Other CRE - non-owner occupied — — — 56 56 0.9 Construction and land development — 41 — — 41 0.9 Total $ — $ 49 $ 2 $ 172 $ 223 0.4 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Tech & innovation $ — $ — $ — $ 7 $ 7 0.3 % Other commercial and industrial — 1 — 12 13 0.2 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 20 — — 20 0.5 Other CRE - non-owner occupied — 20 — — 20 0.3 Total $ — $ 44 $ — $ 19 $ 63 0.1 % Amortized Cost Basis at September 30, 2023 Payment Delay and Term Extension Term Extension Interest Rate Reduction Payment Delay Total % of Total Class of Financing Receivable Nine Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ — $ 7 $ 9 0.4 % Other commercial and industrial — 24 — 12 36 0.6 CRE - owner occupied — 3 — — 3 0.2 Hotel franchise finance — 46 — — 46 1.1 Other CRE - non-owner occupied — 48 — — 48 0.8 Residential — — — 1 1 0.0 Total $ 2 $ 121 $ — $ 20 $ 143 0.3 %
Collateral-Dependent Loans	The following table presents the amortized cost basis of collateral-dependent loans by loan portfolio segment: September 30, 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 — 2 2 — — — Other commercial and industrial — 3 3 — 29 29 CRE - owner occupied 12 — 12 43 — 43 Hotel franchise finance 64 — 64 104 — 104 Other CRE - non-owner occupied 345 — 345 136 — 136 Construction and land development 59 — 59 71 — 71 Total $ 480 $ 10 $ 490 $ 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 September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 6.5 $ (0.6) $ — $ — $ 5.9 Municipal & nonprofit 14.0 (0.3) — — 13.7 Tech & innovation 45.0 21.2 3.5 — 62.7 Equity fund resources 1.7 0.2 — — 1.9 Other commercial and industrial 84.3 1.9 0.7 (0.4) 85.9 CRE - owner occupied 5.0 0.1 0.3 — 4.8 Hotel franchise finance 39.6 (1.2) — (0.7) 39.1 Other CRE - non-owner occupied 104.5 10.7 21.7 — 93.5 Residential 18.8 0.4 — — 19.2 Residential - EBO — — — — — Construction and land development 29.9 (1.3) 1.5 — 27.1 Other 2.5 0.3 0.1 (0.1) 2.8 Total $ 351.8 $ 31.4 $ 27.8 $ (1.2) $ 356.6 Nine Months Ended September 30, 2024 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.8 $ 0.1 $ — $ — $ 5.9 Municipal & nonprofit 14.7 (1.0) — — 13.7 Tech & innovation 42.1 25.6 5.0 — 62.7 Equity fund resources 1.3 0.6 — — 1.9 Other commercial and industrial 81.4 10.3 6.7 (0.9) 85.9 CRE - owner occupied 6.0 (0.9) 0.3 — 4.8 Hotel franchise finance 33.4 7.9 2.9 (0.7) 39.1 Other CRE - non-owner occupied 96.0 41.8 44.3 — 93.5 Residential 23.1 (3.9) — — 19.2 Residential - EBO — — — — — Construction and land development 30.4 (1.8) 1.5 — 27.1 Other 2.5 0.4 0.2 (0.1) 2.8 Total $ 336.7 $ 79.1 $ 60.9 $ (1.7) $ 356.6 Three Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 5.2 $ (0.5) $ — $ — $ 4.7 Municipal & nonprofit 16.5 0.2 — — 16.7 Tech & innovation 33.6 (1.6) — — 32.0 Equity fund resources 1.7 — — — 1.7 Other commercial and industrial 51.8 22.8 5.4 (0.3) 69.5 CRE - owner occupied 8.0 (0.3) — — 7.7 Hotel franchise finance 45.7 (5.1) — — 40.6 Other CRE - non-owner occupied 90.1 8.6 3.0 — 95.7 Residential 33.9 (7.9) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 31.7 (2.6) — — 29.1 Other 2.9 0.7 0.1 (0.1) 3.6 Total $ 321.1 $ 14.3 $ 8.5 $ (0.5) $ 327.4 Nine Months Ended September 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (3.7) $ — $ — $ 4.7 Municipal & nonprofit 15.9 0.8 — — 16.7 Tech & innovation 30.8 3.0 1.8 — 32.0 Equity fund resources 6.4 (4.7) — — 1.7 Other commercial and industrial 85.9 (2.0) 18.7 (4.3) 69.5 CRE - owner occupied 7.1 0.6 — — 7.7 Hotel franchise finance 46.9 (6.3) — — 40.6 Other CRE - non-owner occupied 47.4 53.5 5.2 — 95.7 Residential 30.4 (4.4) — (0.1) 26.1 Residential - EBO — — — — — Construction and land development 27.4 1.7 — — 29.1 Other 3.1 0.6 0.2 (0.1) 3.6 Total $ 309.7 $ 39.1 $ 25.9 $ (4.5) $ 327.4 The below table reflects the activity in the ACL on unfunded loan commitments: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Balance, beginning of period $ 35.9 $ 41.1 $ 31.6 $ 47.0 Provision for (recovery of) credit losses 1.7 (3.2) 6.0 (9.1) Balance, end of period $ 37.6 $ 37.9 $ 37.6 $ 37.9 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: September 30, 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 $ 7,873 $ — $ 7,873 $ 5.9 $ — $ 5.9 Municipal & nonprofit 1,661 6 1,667 13.1 0.6 13.7 Tech & innovation 3,089 131 3,220 32.6 30.1 62.7 Equity fund resources 906 — 906 1.9 — 1.9 Other commercial and industrial 8,952 121 9,073 85.4 0.5 85.9 CRE - owner occupied 1,651 14 1,665 4.8 — 4.8 Hotel franchise finance 3,623 63 3,686 39.1 — 39.1 Other CRE - non-owner occupied 6,053 345 6,398 86.6 6.9 93.5 Residential 12,983 — 12,983 19.2 — 19.2 Residential EBO 1,037 — 1,037 — — — Construction and land development 4,606 59 4,665 27.1 — 27.1 Other 172 1 173 2.8 — 2.8 Total $ 52,606 $ 740 $ 53,346 $ 318.5 $ 38.1 $ 356.6 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)	9 Months Ended
	Sep. 30, 2024
Transfers and Servicing [Abstract]
Changes in Fair Value of the Company's MSR Portfolio	The following table presents changes in the 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Balance, beginning of period $ 1,145 $ 1,007 $ 1,124 $ 1,148 Additions from loans sold with servicing rights retained 223 266 626 653 Carrying value of MSRs sold (258) (112) (655) (611) Change in fair value (62) 98 30 114 Mark to market adjustments — — — 4 Realization of cash flows (37) (26) (114) (75) Balance, end of period $ 1,011 $ 1,233 $ 1,011 $ 1,233 Unpaid principal balance of mortgage loans serviced for others $ 63,773 $ 70,261
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: September 30, 2024 (in millions) Fair value of mortgage servicing rights $ 1,011 Increase (decrease) in fair value resulting from: Interest rate change of 50 basis points Adverse change (84) Favorable change 81 Discount rate change of 50 basis points Increase (21) Decrease 21 Conditional prepayment rate change of 1% Increase (33) Decrease 36 Cost to service change of 10% Increase (12) Decrease 12

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2024
Other Liabilities Disclosure [Abstract]
Deposits by Type	The table below summarizes deposits by type: September 30, 2024 December 31, 2023 (in millions) Non-interest bearing deposits $ 24,965 $ 14,520 Interest bearing: Demand accounts 13,846 15,916 Savings and money market accounts 19,575 14,791 Time certificates of deposit ($250,000 or more) 1,567 1,478 Other time deposits (1) 8,087 8,628 Total deposits $ 68,040 $ 55,333 (1) Retail brokered time deposits over $250,000 of $4.9 billion and $5.8 billion as of September 30, 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 September 30, 2024 is as follows: (in millions) 2024 $ 3,911 2025 5,521 2026 211 2027 8 2028 1 Thereafter 2 Total $ 9,654

Other Borrowings (Tables)

Other Borrowings (Tables)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Company's Borrowings	The following table summarizes the Company’s other borrowings by type: September 30, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 1,500 6,200 Repurchase agreements 5 382 Secured borrowings 62 27 Total short-term borrowings $ 1,567 $ 6,784 Long-Term: FHLB advances $ 1,000 $ — Credit linked notes, net 428 446 Total long-term borrowings $ 1,428 $ 446 Total other borrowings $ 2,995 $ 7,230 The Company's outstanding credit linked note issuances are detailed in the tables below: September 30, 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% $ 86 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 172 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 183 2 Total $ 441 $ 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 $1.7 billion and $1.8 billion as of September 30, 2024 and December 31, 2023, respectively. (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 September 30, 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 $3.6 billion and $3.8 billion as of September 30, 2024 and December 31, 2023, respectively. The Company's subordinated debt issuances are detailed in the tables below: September 30, 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 $ 5 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 — Total $ 825 $ 5 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)	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Company's Borrowings	The following table summarizes the Company’s other borrowings by type: September 30, 2024 December 31, 2023 (in millions) Short-Term: Federal funds purchased $ — $ 175 FHLB advances 1,500 6,200 Repurchase agreements 5 382 Secured borrowings 62 27 Total short-term borrowings $ 1,567 $ 6,784 Long-Term: FHLB advances $ 1,000 $ — Credit linked notes, net 428 446 Total long-term borrowings $ 1,428 $ 446 Total other borrowings $ 2,995 $ 7,230 The Company's outstanding credit linked note issuances are detailed in the tables below: September 30, 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% $ 86 $ 2 Residential mortgage loans (2) June 30, 2022 April 25, 2052 SOFR + 6.00% 172 3 Residential mortgage loans (3) December 29, 2021 July 25, 2059 SOFR + 4.67% 183 2 Total $ 441 $ 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 $1.7 billion and $1.8 billion as of September 30, 2024 and December 31, 2023, respectively. (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 September 30, 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 $3.6 billion and $3.8 billion as of September 30, 2024 and December 31, 2023, respectively. The Company's subordinated debt issuances are detailed in the tables below: September 30, 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 $ 5 WAB fixed-to-variable-rate (2) May 2020 June 1, 2030 5.25 % 225 — Total $ 825 $ 5 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)	9 Months Ended
	Sep. 30, 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 September 30, 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, June 30, 2024 $ (560.9) $ (0.3) $ 1.8 $ 1.2 $ (558.2) Other comprehensive income (loss) before reclassifications 183.7 (0.1) (0.3) — 183.3 Amounts reclassified from AOCI (6.6) — — — (6.6) Net current-period other comprehensive income (loss) 177.1 (0.1) (0.3) — 176.7 Balance, September 30, 2024 $ (383.8) $ (0.4) $ 1.5 $ 1.2 $ (381.5) Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Other comprehensive loss before reclassifications (120.2) — (1.2) — (121.4) Amounts reclassified from AOCI (0.4) — — — (0.4) Net current-period other comprehensive loss (120.6) — (1.2) — (121.8) Balance, September 30, 2023 $ (738.9) $ (0.3) $ 5.7 $ 1.2 $ (732.3) Nine Months Ended September 30, 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 income (loss) before reclassifications 140.5 (0.1) (1.3) — 139.1 Amounts reclassified from AOCI (7.7) — — — (7.7) Net current-period other comprehensive income (loss) 132.8 (0.1) (1.3) — 131.4 Balance, September 30, 2024 $ (383.8) $ (0.4) $ 1.5 $ 1.2 $ (381.5) Balance, December 31, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive (loss) income before reclassifications (94.3) — 2.7 1.2 (90.4) Amounts reclassified from AOCI 19.1 — — — 19.1 Net current-period other comprehensive (loss) income (75.2) — 2.7 1.2 (71.3) Balance, September 30, 2023 $ (738.9) $ (0.3) $ 5.7 $ 1.2 $ (732.3)

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Assets at Fair Value	As of September 30, 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: September 30, 2024 December 31, 2023 Carrying Value of Hedged Assets Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 4,836 $ 38 $ 3,875 $ (6) (1) Included in the carrying value of the hedged assets. (2) Included portfolio layer method derivative instruments with $4.5 billion and $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $9.4 billion and $6.7 billion) as of September 30, 2024 and December 31, 2023, respectively. The cumulative basis adjustment included in the carrying value of these hedged items totaled $44.4 million and $19.0 million as of September 30, 2024 and December 31, 2023, respectively.
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 September 30, 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 $ (31.4) $ 31.2 $ 76.5 $ (76.0) Nine Months Ended September 30, 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 $ (114.6) $ 115.1 $ 111.2 $ (110.7) The following table summarizes the net gain (loss) on derivatives included in the non-interest income line items below: Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ 2.6 $ (5.2) $ (7.8) $ (4.9) Forward contracts (87.3) 68.7 (61.3) 87.5 Interest rate contracts 6.7 (8.4) 3.8 (11.8) Other contracts (1.1) (0.3) (0.2) 1.5 Net (loss) gain on derivatives $ (79.1) $ 54.8 $ (65.5) $ 72.3 Net loan servicing revenue: Forward contracts $ 17.9 $ (19.2) $ (9.6) $ (34.0) Futures contracts (7.0) (2.4) 7.4 12.3 Interest rate contracts 42.2 (82.4) (10.8) (100.0) Net gain (loss) on derivatives $ 53.1 $ (104.0) $ (13.0) $ (121.7)
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 September 30, 2024, December 31, 2023, and September 30, 2023. The change in the notional amounts of these derivatives from September 30, 2023 to September 30, 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. September 30, 2024 December 31, 2023 September 30, 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 $ 4,852 $ 14 $ 51 $ 3,895 $ 19 $ 24 $ 3,899 $ 128 $ — Total $ 4,852 $ 14 $ 51 $ 3,895 $ 19 $ 24 $ 3,899 $ 128 $ — Derivatives not designated as hedging instruments: Foreign currency contracts $ 101 $ 1 $ — $ 135 $ 1 $ 1 $ 74 $ 1 $ — Forward contracts 17,889 20 38 13,170 27 55 9,653 43 21 Futures contracts (1) 7,400 — — 11,030 — — 13,845 — — Interest rate lock commitments 2,843 13 2 1,822 18 — 1,761 3 6 Interest rate contracts 5,317 28 29 3,628 19 20 3,187 20 20 Risk participation agreements 96 — — 72 — — 44 — — Equity warrants 56 21 — 55 4 — 40 4 — Total $ 33,702 $ 83 $ 69 $ 29,912 $ 69 $ 76 $ 28,604 $ 71 $ 47 Margin — 280 (4) — 202 (9) — 66 25 Total, including margin $ 33,702 $ 363 $ 65 $ 29,912 $ 271 $ 67 $ 28,604 $ 137 $ 72 (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. 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: September 30, 2024 December 31, 2023 September 30, 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 contracts 20 — 20 27 — 27 43 — 43 Interest rate contracts 18 — 18 31 — 31 148 — 148 Margin 280 — 280 202 — 202 66 — 66 Netting — (94) (94) — (67) (67) — (43) (43) $ 319 $ (94) $ 225 $ 260 $ (67) $ 193 $ 257 $ (43) $ 214 Liabilities Foreign currency contracts $ — $ — $ — $ (1) $ — $ (1) $ — $ — $ — Forward contracts (37) — (37) (55) — (55) (21) — (21) Interest rate contracts (70) — (70) (31) — (31) — — — Margin 4 — 4 9 — 9 (25) — (25) Netting — 94 94 — 67 67 — 43 43 $ (103) $ 94 $ (9) $ (78) $ 67 $ (11) $ (46) $ 43 $ (3) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ — $ — $ — $ 1 $ — $ 1 $ 1 $ — $ 1 Interest rate lock commitments 13 — 13 18 — 18 3 — 3 Interest rate contracts 24 — 24 7 — 7 — — — Equity warrants 21 — 21 4 — 4 4 — 4 $ 58 $ — $ 58 $ 30 $ — $ 30 $ 8 $ — $ 8 Liabilities Forward contracts $ (1) $ — $ (1) $ — $ — $ — $ — $ — $ — Interest rate lock commitments (2) — (2) — — — (6) — (6) Interest rate contracts (10) — (10) (13) — (13) (20) — (20) $ (13) $ — $ (13) $ (13) $ — $ (13) $ (26) $ — $ (26) Total derivatives and margin Assets $ 377 $ (94) $ 283 $ 290 $ (67) $ 223 $ 265 $ (43) $ 222 Liabilities $ (116) $ 94 $ (22) $ (91) $ 67 $ (24) $ (72) $ 43 $ (29)

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions, except per share amounts) Weighted average shares - basic 108.7 108.3 108.6 108.3 Dilutive effect of stock awards 0.8 0.2 0.6 0.1 Weighted average shares - diluted 109.5 108.5 109.2 108.4 Net income available to common stockholders $ 196.6 $ 213.4 $ 561.2 $ 564.9 Earnings per Common Share: Basic $ 1.81 $ 1.97 $ 5.17 $ 5.22 Diluted 1.80 1.97 5.14 5.21 Antidilutive restricted stock outstanding — — — 0.1

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 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: September 30, 2024 December 31, 2023 (in millions) Commitments to extend credit, including unsecured loan commitments of $916 at September 30, 2024 and $989 at December 31, 2023 $ 13,299 $ 13,291 Credit card commitments and financial guarantees 495 418 Letters of credit, including unsecured letters of credit of $2 at September 30, 2024 and $4 at December 31, 2023 289 222 Total $ 14,083 $ 13,931

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	9 Months Ended
	Sep. 30, 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Unrealized (losses) gains $ (0.4) $ (1.6) $ (1.8) $ 3.6 Changes included in OCI, net of tax (0.3) (1.2) (1.3) 2.7
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 September 30, 2024 (in millions) Assets: Available-for-sale debt securities Residential MBS issued by GSEs $ — $ 5,629 $ — $ 5,629 U.S. Treasury securities 5,600 — — 5,600 Private label residential MBS — 1,042 — 1,042 Tax-exempt — 870 — 870 Commercial MBS issued by GSEs — 653 — 653 CLO — 508 — 508 Corporate debt securities — 379 — 379 Other 2 67 — 69 Total AFS debt securities $ 5,602 $ 9,148 $ — $ 14,750 Equity securities Preferred stock $ 91 $ — $ — $ 91 CRA investments 26 — — 26 Total equity securities $ 117 $ — $ — $ 117 Loans HFS (2) $ — $ 2,290 $ 2 $ 2,292 Mortgage servicing rights — — 1,011 1,011 Derivative assets (1) — 63 34 97 Liabilities: Junior subordinated debt (3) $ — $ — $ 65 $ 65 Derivative liabilities (1) — 118 2 120 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is increased by $38 million as of September 30, 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 $280 million and $(4) 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 decreased 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 September 30, Nine Months Ended September 30, 2024 2023 2024 2023 (in millions) Beginning balance $ (64.2) $ (57.3) $ (62.8) $ (62.5) Change in fair value (1) (0.4) (1.6) (1.8) 3.6 Ending balance $ (64.6) $ (58.9) $ (64.6) $ (58.9) (1) Unrealized (losses) gains attributable to changes in the fair value of junior subordinated debt are recorded in OCI, net of tax, and totaled $(0.3) million and $(1.2) million for three months ended September 30, 2024 and 2023, respectively, and $(1.3) million and $2.7 million for the nine months ended September 30, 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 September 30, 2024 Nine Months Ended September 30, 2024 MSRs IRLCs (1) MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,145 $ 8 $ 1,124 $ 18 Purchases and additions 223 5,387 626 14,024 Sales and payments (258) — (655) — Settlement of IRLCs upon acquisition or origination of loans HFS — (5,395) — (14,042) Change in fair value (62) 10 30 10 Realization of cash flows (37) — (114) — Balance, end of period $ 1,011 $ 10 $ 1,011 $ 10 Changes in unrealized gains for the period (2) $ (61) $ 10 $ (25) $ 10 Three Months Ended September 30, 2023 Nine Months Ended September 30, 2023 MSRs IRLCs (1) MSRs IRLCs (1) (in millions) Balance, beginning of period $ 1,007 $ 2 $ 1,148 $ 2 Purchases and additions 266 4,616 653 11,772 Sales and payments (112) — (611) — Settlement of IRLCs upon acquisition or origination of loans HFS — (4,619) — (11,773) Change in fair value 98 (2) 114 (4) Mark to market adjustments — — 4 — Realization of cash flows (26) — (75) — Balance, end of period $ 1,233 $ (3) $ 1,233 $ (3) Changes in unrealized gains for the period (2) $ 97 $ (3) $ 128 $ (3) (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: September 30, 2024 Asset/liability Key inputs Range Weighted average MSRs: Option adjusted spread (in basis points) 37 - 337 267 Conditional prepayment rate (1) 9.1% - 24.7% 18.1 % Recapture rate 20.0% - 20.0% 20.0 % Servicing fee rate (in basis points) 25.0 - 56.5 36.2 Cost to service $75 - $95 $ 83 IRLCs: Servicing fee multiple 2.8 - 6.6 4.2 Pull-through rate 69% - 100% 83 % 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: September 30, 2024 Valuation Technique(s) Significant Unobservable Inputs Range (in millions) Loans HFI $ 481 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: September 30, 2024 Valuation Technique Significant Unobservable Inputs Input Value (in millions) Junior subordinated debt $ 65 Discounted cash flow Implied credit rating of the Company 7.75 % 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 September 30, 2024: Loans HFI $ 481 $ — $ — $ 481 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: September 30, 2024 December 31, 2023 Fair value UPB Difference Fair value UPB Difference (in millions) Loans HFS: Current through 89 days delinquent $ 2,292 $ 2,210 $ 82 $ 1,379 $ 1,319 $ 60 90 days or more delinquent — — — 1 2 (1) Total $ 2,292 $ 2,210 $ 82 $ 1,380 $ 1,321 $ 59 The estimated fair value of the Company’s financial instruments is as follows: September 30, 2024 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,525 $ — $ 1,371 $ — $ 1,371 AFS 14,750 5,602 9,148 — 14,750 Equity 117 117 — — 117 Derivative assets (1) 97 — 63 34 97 Loans HFS 2,327 — 2,303 23 2,326 Loans HFI, net 52,989 — — 51,739 51,739 Mortgage servicing rights 1,011 — — 1,011 1,011 Accrued interest receivable 367 — 367 — 367 Financial liabilities: Deposits $ 68,040 $ — $ 68,099 $ — $ 68,099 Other borrowings 2,995 — 2,966 — 2,966 Qualifying debt 898 — 773 78 851 Derivative liabilities (1) 120 — 118 2 120 Accrued interest payable 167 — 167 — 167 (1) Derivative assets and liabilities exclude margin of $280 million and $(4) 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 22 88 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)	9 Months Ended
	Sep. 30, 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 September 30, 2024: (in millions) Assets: Cash, cash equivalents, and investment securities $ 18,974 $ 15 $ — $ 18,959 Loans HFS 2,327 — 2,327 — Loans HFI, net of deferred fees and costs 53,346 31,518 21,828 — Less: allowance for credit losses (357) (298) (59) — Net loans HFI 52,989 31,220 21,769 — Goodwill and other intangible assets, net 661 291 370 — Other assets 5,129 398 1,814 2,917 Total assets $ 80,080 $ 31,924 $ 26,280 $ 21,876 Liabilities: Deposits $ 68,040 $ 24,335 $ 37,183 $ 6,522 Borrowings and qualifying debt 3,893 5 62 3,826 Other liabilities 1,470 87 525 858 Total liabilities 73,403 24,427 37,770 11,206 Allocated equity: 6,677 2,734 1,844 2,099 Total liabilities and stockholders' equity $ 80,080 $ 27,161 $ 39,614 $ 13,305 Excess funds provided (used) $ — $ (4,763) $ 13,334 $ (8,571) Income Statement: Three Months Ended September 30, 2024: (in millions) Net interest income (expense) $ 696.9 $ 286.2 $ 433.6 $ (22.9) Provision for credit losses 33.6 27.7 5.4 0.5 Net interest income (expense) after provision for credit losses 663.3 258.5 428.2 (23.4) Non-interest income 126.2 31.3 64.0 30.9 Non-interest expense 537.4 150.5 378.7 8.2 Income (loss) before provision for income taxes 252.1 139.3 113.5 (0.7) Income tax expense 52.3 28.8 19.0 4.5 Net income (loss) $ 199.8 $ 110.5 $ 94.5 $ (5.2) Nine Months Ended September 30, 2024: (in millions) Net interest income $ 1,952.4 $ 867.3 $ 1,065.2 $ 19.9 Provision for credit losses 85.9 79.1 6.0 0.8 Net interest income after provision for credit losses 1,866.5 788.2 1,059.2 19.1 Non-interest income 371.3 80.5 249.6 41.2 Non-interest expense 1,506.0 457.3 1,005.7 43.0 Income before provision for income taxes 731.8 411.4 303.1 17.3 Income tax expense 161.0 90.5 62.3 8.2 Net income $ 570.8 $ 320.9 $ 240.8 $ 9.1 Balance Sheet: Consolidated Company Commercial Consumer Related Corporate At December 31, 2023: (in millions) Assets: Cash, cash equivalents, and investment securities $ 14,288 $ 13 $ 125 $ 14,150 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 — Goodwill and other intangible assets, net 669 292 377 — Other assets 4,543 398 1,826 2,319 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 September 30, 2023: (in millions) Net interest income $ 587.0 $ 331.5 $ 243.8 $ 11.7 Provision for (recovery of) credit losses 12.1 14.1 (3.0) 1.0 Net interest income after provision for credit losses 574.9 317.4 246.8 10.7 Non-interest income 129.2 25.9 89.4 13.9 Non-interest expense 426.2 147.2 267.3 11.7 Income before provision for income taxes 277.9 196.1 68.9 12.9 Income tax expense (benefit) 61.3 64.9 28.8 (32.4) Net income $ 216.6 $ 131.2 $ 40.1 $ 45.3 Nine Months Ended September 30, 2023: (in millions) Net interest income $ 1,747.2 $ 1,077.5 $ 647.8 $ 21.9 Provision for credit losses 53.3 29.7 0.4 23.2 Net interest income (expense) after provision for credit losses 1,693.9 1,047.8 647.4 (1.3) Non-interest income 190.2 (40.1) 226.6 3.7 Non-interest expense 1,161.5 430.9 691.6 39.0 Income (loss) before provision for income taxes 722.6 576.8 182.4 (36.6) Income tax expense (benefit) 148.1 125.1 39.4 (16.4) Net income (loss) $ 574.5 $ 451.7 $ 143.0 $ (20.2)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2024 Subsidiary
Accounting Policies [Abstract]
Number of unconsolidated subsidiaries	8

Investment Securities - Carryin

Investment Securities - Carrying Amounts and Fair Values of Investment Securities (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Held-to-maturity
Amortized cost	$ 1,525	$ 1,429
Gross unrealized gains	3	1
Gross unrealized (losses)	(157)	(179)
Investment securities - HTM, fair value	1,371	1,251
Available-for-sale debt securities
Amortized Cost	15,258	11,849
Gross unrealized gains	77	18
Gross unrealized (losses)	(585)	(702)
Fair value	14,750	11,165
Tax-exempt
Held-to-maturity
Amortized cost	1,346	1,243
Gross unrealized gains	3	1
Gross unrealized (losses)	(125)	(140)
Investment securities - HTM, fair value	1,224	1,104
Available-for-sale debt securities
Amortized Cost	930	925
Gross unrealized gains	0	0
Gross unrealized (losses)	(60)	(67)
Fair value	870	858
Private label residential MBS
Held-to-maturity
Amortized cost	179	186
Gross unrealized gains	0	0
Gross unrealized (losses)	(32)	(39)
Investment securities - HTM, fair value	147	147
Available-for-sale debt securities
Amortized Cost	1,205	1,320
Gross unrealized gains	1	1
Gross unrealized (losses)	(164)	(204)
Fair value	1,042	1,117
Residential MBS issued by GSEs
Available-for-sale debt securities
Amortized Cost	5,887	2,328
Gross unrealized gains	58	3
Gross unrealized (losses)	(316)	(359)
Fair value	5,629	1,972
U.S. Treasury securities
Available-for-sale debt securities
Amortized Cost	5,597	4,853
Gross unrealized gains	4	1
Gross unrealized (losses)	(1)	(1)
Fair value	5,600	4,853
Commercial MBS issued by GSEs
Available-for-sale debt securities
Amortized Cost	648	531
Gross unrealized gains	13	8
Gross unrealized (losses)	(8)	(9)
Fair value	653	530
Corporate debt securities
Available-for-sale debt securities
Amortized Cost	407	411
Gross unrealized gains	0	0
Gross unrealized (losses)	(28)	(44)
Fair value	379	367
Other
Available-for-sale debt securities
Amortized Cost	75	74
Gross unrealized gains	1	4
Gross unrealized (losses)	(7)	(9)
Fair value	69	69
CLO
Available-for-sale debt securities
Amortized Cost	509	1,407
Gross unrealized gains	0	1
Gross unrealized (losses)	(1)	(9)
Fair value	$ 508	$ 1,399

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	$ 117		$ 117		$ 126
Unrealized gains (losses) on assets measured at fair value, net	3.2	$ 5.1	5.9	$ (3.3)
Fair value	$ 14,750		$ 14,750		$ 11,165
Number of AFS debt securities in an unrealized loss position | security	658		658		708
Recovery of Credit Losses	$ (0.4)		$ (1)
Provision for Credit Losses		0.3		21.8
Charge-offs	0	0	0	(17.1)
Accrued interest receivable	5		5		$ 5
Carrying value of securities sold	2,300	7	4,000	821
Net gain (loss) recognized	8.8	$ 0.1	10.2	$ (26)
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Fair value	$ 4,700		$ 4,700		$ 7,700

Investment Securities - Unreali

Investment Securities - Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	$ 13	$ 7
Less Than Twelve Months, Fair Value	2,819	2,449
More Than Twelve Months, Gross Unrealized Losses	572	695
More Than Twelve Months, Fair Value	3,814	4,655
Total Gross Unrealized Losses	585	702
Total Fair Value	6,633	7,104
Residential MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	1	3
Less Than Twelve Months, Fair Value	150	174
More Than Twelve Months, Gross Unrealized Losses	315	356
More Than Twelve Months, Fair Value	1,568	1,551
Total Gross Unrealized Losses	316	359
Total Fair Value	1,718	1,725
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	1	1
Less Than Twelve Months, Fair Value	2,210	2,208
More Than Twelve Months, Gross Unrealized Losses	0	0
More Than Twelve Months, Fair Value	0	0
Total Gross Unrealized Losses	1	1
Total Fair Value	2,210	2,208
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	164	204
More Than Twelve Months, Fair Value	993	1,020
Total Gross Unrealized Losses	164	204
Total Fair Value	993	1,020
Tax-exempt
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	0	3
Less Than Twelve Months, Fair Value	0	67
More Than Twelve Months, Gross Unrealized Losses	60	64
More Than Twelve Months, Fair Value	835	773
Total Gross Unrealized Losses	60	67
Total Fair Value	835	840
Commercial MBS issued by GSEs
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	7	0
Less Than Twelve Months, Fair Value	92	0
More Than Twelve Months, Gross Unrealized Losses	1	9
More Than Twelve Months, Fair Value	17	53
Total Gross Unrealized Losses	8	9
Total Fair Value	109	53
CLO
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	1	0
Less Than Twelve Months, Fair Value	338	0
More Than Twelve Months, Gross Unrealized Losses	0	9
More Than Twelve Months, Fair Value	0	845
Total Gross Unrealized Losses	1	9
Total Fair Value	338	845
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	28	44
More Than Twelve Months, Fair Value	375	359
Total Gross Unrealized Losses	28	44
Total Fair Value	375	359
Corporate Bond Securities, With ACL
Debt Securities, Available-for-sale [Line Items]
Total Gross Unrealized Losses	1	8
Total Fair Value	8	54
Other
Debt Securities, Available-for-sale [Line Items]
Less Than Twelve Months, Gross Unrealized Losses	3	0
Less Than Twelve Months, Fair Value	29	0
More Than Twelve Months, Gross Unrealized Losses	4	9
More Than Twelve Months, Fair Value	26	54
Total Gross Unrealized Losses	7	9
Total Fair Value	$ 55	$ 54

Investment Securities - Allowan

Investment Securities - Allowance for Credit Losses, Available-for-Sale (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 0.8	$ 4.4	$ 1.4	$ 0
Recovery of Credit Losses	(0.4)		(1)
Provision for Credit Losses		0.3		21.8
Charge-offs	0	0	0	(17.1)
Recoveries	0	0	0	0
Ending balance	$ 0.4	$ 4.7	$ 0.4	$ 4.7

Investment Securities - Allow_2

Investment Securities - Allowance for Credit Losses, Held-to-Maturity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance			$ 8
Ending balance	$ 10		10
Tax-exempt
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Beginning balance	8.7	$ 6	7.8	$ 5.2
Provision for Credit Losses	0.9	0.7	1.8	1.5
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	$ 9.6	$ 6.7	$ 9.6	$ 6.7

Investment Securities - Investm

Investment Securities - Investment Securities by Credit Rating Type (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	$ 1,525	$ 1,429
Fair value	14,750	11,165
Investment securities - equity	117	126
AAA
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	1,048	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	11,899	7,371
Investment securities - equity	26	26
AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	871	1,661
Investment securities - equity	0	0
A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	474	528
Investment securities - equity	0	0
BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	260	239
Investment securities - equity	51	54
BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	80	85
Investment securities - equity	29	35
Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	1,525	1,429
Fair value	118	103
Investment securities - equity	11	11
Tax-exempt
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	1,346	1,243
Fair value	870	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	352	361
Tax-exempt | A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	394	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	1,346	1,243
Fair value	100	86
Private label residential MBS
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	179	186
Fair value	1,042	1,117
Private label residential MBS | AAA
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	0	0
Fair value	1,015	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	27	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	0	1
Private label residential MBS | Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost	179	186
Fair value	0	0
Residential MBS issued by GSEs
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	5,629	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	5,629	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
U.S. Treasury securities
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	5,600	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	5,600	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
Commercial MBS issued by GSEs
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	653	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	653	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	379	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	78	76
Corporate debt securities | BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	222	211
Corporate debt securities | BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	79	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	2	0
Other | AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	8	9
Other | A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	2	11
Other | BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	38	28
Other | BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	1	4
Other | Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	18	17
Preferred Stock
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	91	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	51	54
Preferred Stock | BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	29	35
Preferred Stock | Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	11	11
CRA investments
Schedule of Held-to-Maturity Securities [Line Items]
Investment securities - equity	26	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	26	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	508	1,399
CLO | AAA
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	24	79
CLO | Split-rated AAA/AA+
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
CLO | AA+ to AA-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	484	1,265
CLO | A+ to A-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	55
CLO | BBB+ to BBB-
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
CLO | BB+ and below
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	0	0
CLO | Unrated
Schedule of Held-to-Maturity Securities [Line Items]
Fair value	$ 0	$ 0

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturities (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Securities held to maturity, Due in one year or less, Amortized Cost	$ 34
Securities held to maturity, After one year through five years, Amortized Cost	7
Securities held to maturity, After five years through ten years, Amortized Cost	97
Securities held to maturity, After ten years, Amortized Cost	1,208
Securities held to maturity, Mortgage backed securities, Amortized Cost	179
Amortized cost	1,525	$ 1,429
Held-to-maturity
Securities held to maturity, Due in one year or less, Estimated Fair Value	34
Securities held to maturity, After one year through five years, Estimated Fair Value	7
Securities held to maturity, After five years through ten years, Estimated Fair Value	89
Securities held to maturity, After ten years, Estimated Fair Value	1,094
Debt securities, held to maturity, Mortgage backed securities, Estimated Fair Value	147
Investment securities - HTM, fair value	1,371	1,251
Amortized Cost
Securities available for sale, Due in one year or less, Amortized Cost	5,079
Securities available for sale, After one year through five years, Amortized Cost	697
Securities available for sale, After five years through ten years, Amortized Cost	567
Securities available for sale, After ten years, Amortized Cost	1,175
Securities available for sale, Mortgage backed securities, Amortized Cost	7,740
Securities available for sale Total, Amortized Cost	15,258
Estimated Fair Value
Securities available for sale, Due in one year or less, Estimated Fair Value	5,081
Securities available for sale, After one year through five years, Estimated Fair Value	692
Securities available for sale, After five years through ten years, Estimated Fair Value	544
Securities available for sale, After ten years, Estimated Fair Value	1,109
Securities available for sale, Mortgage backed securities, Estimated Fair Value	7,324
Securities available for sale Total, Estimated Fair Value	$ 14,750	$ 11,165

Investment Securities - Gross G

Investment Securities - Gross Gains and (Losses) on Sales of Investments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investment securities - AFS
Gross gains	$ 8.8	$ 0.5	$ 12.4	$ 4
Gross losses	0	0	(2.2)	(29.6)
Net gains (losses) on AFS securities	8.8	0.5	10.2	(25.6)
Equity securities
Gross gains	0	0	0	0
Gross losses	0	(0.4)	0	(0.4)
Net losses on equity securities	$ 0	$ (0.4)	$ 0	$ (0.4)

Loans Held For Sale - Summary o

Loans Held For Sale - Summary of Loans HFS by Type (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	$ 2,327	$ 1,402
Total government-insured or guaranteed
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	816	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	816	498
Agency-conforming
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	1,497	899
Non-agency
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans HFS	$ 14	$ 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Receivables [Abstract]
Mortgage servicing rights capitalized upon sale of loans	$ 222.5	$ 265.8	$ 625.9	$ 653
Net proceeds from sale of loans	(116.4)	(274.7)	(467.7)	(612.7)
Provision for and change in estimate of liability for losses under representations and warranties, net	0	0.1	4.2	2.8
Change in fair value	4	(10.1)	(1.3)	(13.2)
Unrealized (loss) gain on derivatives	(2.9)	10.3	14.2	25.3
Realized (loss) gain on derivatives	(76.3)	44.5	(79.7)	47
Total change in fair value of derivatives	(79.2)	54.8	(65.5)	72.3
Net gain on residential mortgage loans HFS	30.9	35.9	95.6	102.2
Loan acquisition and origination fees	15.4	16.1	42.8	43.5
Net gain on loan origination and sale activities	$ 46.3	$ 52	$ 138.4	$ 145.7

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	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	$ 53,346		$ 50,297
Less: allowance for credit losses	(356.6)	$ (351.8)	(336.7)	$ (327.4)	$ (321.1)	$ (309.7)
Net loans HFI	52,989		49,960
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	7,873		6,618
Less: allowance for credit losses	(5.9)	(6.5)	(5.8)	(4.7)	(5.2)	(8.4)
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,667		1,554
Less: allowance for credit losses	(13.7)	(14)	(14.7)	(16.7)	(16.5)	(15.9)
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	3,220		2,808
Less: allowance for credit losses	(62.7)	(45)	(42.1)	(32)	(33.6)	(30.8)
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	906		845
Less: allowance for credit losses	(1.9)	(1.7)	(1.3)	(1.7)	(1.7)	(6.4)
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	9,073		7,452
Less: allowance for credit losses	(85.9)	(84.3)	(81.4)	(69.5)	(51.8)	(85.9)
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,665		1,658
Less: allowance for credit losses	(4.8)	(5)	(6)	(7.7)	(8)	(7.1)
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	3,686		3,855
Less: allowance for credit losses	(39.1)	(39.6)	(33.4)	(40.6)	(45.7)	(46.9)
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	6,398		5,974
Less: allowance for credit losses	(93.5)	(104.5)	(96)	(95.7)	(90.1)	(47.4)
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	12,983		13,287
Less: allowance for credit losses	(19.2)	(18.8)	(23.1)	(26.1)	(33.9)	(30.4)
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	1,037		1,223
Less: allowance for credit losses	0	0	0	0	0	0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	4,665		4,862
Less: allowance for credit losses	(27.1)	(29.9)	(30.4)	(29.1)	(31.7)	(27.4)
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans HFI, net of deferred fees and costs	173		161
Less: allowance for credit losses	$ (2.8)	$ (2.5)	$ (2.5)	$ (3.6)	$ (2.9)	$ (3.1)

Loans, Leases and Allowance f_4

Loans, Leases and Allowance for Credit Losses - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Unamortized loan fees	$ 107		$ 107		$ 108
Financing receivable, unamortized premium	173		173		177
Loans Past Due 90 Days or More and Still Accruing	317		317		441
Interest income associated with loans on nonaccrual status	6.6	$ 4.5	18.4	$ 8.1
Modified loans current with contractual payments	136		136		95
Modified loans on nonaccrual status	136		136		111
Amortized cost basis	89	63	223	143
Interest receivable	271		271		281
Loan purchases	360	329	875	1,400
Loan sales	161	904	550	4,700
Transfers of loans to HFS		442		7,700
Charge-off	0.4		1.8
Net gain on residential mortgage loans HFS	30.9	35.9	95.6	102.2
Gain (loss) on sale of loan	(0.1)	(21.4)	(5.7)	(237.2)
Transfers of loans HFS to HFI, at amortized cost		1,400	1.8	2,357.2
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans Past Due 90 Days or More and Still Accruing	313		313		399
Amortized cost basis	106	$ 84	285	176
Interest receivable	2		2		4
Loan purchases	109		291
Residential - EBO | Financial Asset, Current to 89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Modified loans	39		39		26
Residential - EBO | Over 90 days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Modified loans	9		9		12
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans Past Due 90 Days or More and Still Accruing	0		0		$ 0
Recorded investment for which formal foreclosure proceedings are in process	$ 96		$ 96
Amortized cost basis				$ 1

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	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	$ 214	$ 151
Nonaccrual with an Allowance for Credit Loss	135	122
Total Nonaccrual	349	273
Loans Past Due 90 Days or More and Still Accruing	317	441
Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0	0
Nonaccrual with an Allowance for Credit Loss	6	6
Total Nonaccrual	6	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	33	23
Nonaccrual with an Allowance for Credit Loss	31	10
Total Nonaccrual	64	33
Loans Past Due 90 Days or More and Still Accruing	0	0
Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	0
Nonaccrual with an Allowance for Credit Loss	0
Total Nonaccrual	0	0
Loans Past Due 90 Days or More and Still Accruing	1
Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	11	19
Nonaccrual with an Allowance for Credit Loss	1	34
Total Nonaccrual	12	53
Loans Past Due 90 Days or More and Still Accruing	3	0
CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	5	8
Nonaccrual with an Allowance for Credit Loss	1	1
Total Nonaccrual	6	9
Loans Past Due 90 Days or More and Still Accruing	0	0
Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	146	82
Nonaccrual with an Allowance for Credit Loss	17	1
Total Nonaccrual	163	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	313	399
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with No Allowance for Credit Loss	18	19
Nonaccrual with an Allowance for Credit Loss	0	0
Total Nonaccrual	18	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	$ 0
Loans Past Due 90 Days or More and Still Accruing

Loans, Leases and Allowance f_6

Loans, Leases and Allowance for Credit Losses - Contractual Aging of Loan Portfolio by Segment (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	$ 53,346	$ 50,297
Total Nonaccrual	349	273
Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	7,873	6,618
Total Nonaccrual	0	0
Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,667	1,554
Total Nonaccrual	6	6
Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,220	2,808
Total Nonaccrual	64	33
Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	906	845
Total Nonaccrual	0	0
Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	9,073	7,452
Total Nonaccrual	12	53
CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,665	1,658
Total Nonaccrual	6	9
Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,686	3,855
Total Nonaccrual	0	0
Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,398	5,974
Total Nonaccrual	163	83
Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	12,983	13,287
Total Nonaccrual	79	70
Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,037	1,223
Total Nonaccrual	0	0
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	4,665	4,862
Total Nonaccrual	18	19
Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	173	161
Total Nonaccrual	1	0
Current
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	52,367	49,413
Current | Warehouse lending
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	7,873	6,618
Current | Municipal & nonprofit
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,661	1,554
Current | Tech & innovation
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,156	2,808
Current | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	905	845
Current | Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	9,053	7,439
Current | CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1,659	1,627
Current | Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3,651	3,824
Current | Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	6,235	5,974
Current | Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	12,835	13,199
Current | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	521	545
Current | Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	4,647	4,820
Current | Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	171	160
30-59 Days Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	219	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	4	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	35	15
30-59 Days Past Due | Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	0
30-59 Days Past Due | Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	55	68
30-59 Days Past Due | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	124	173
30-59 Days Past Due | Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	0
30-59 Days Past Due | Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	1	1
60-89 Days Past Due
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	94	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	1	0
60-89 Days Past Due | CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	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	14	20
60-89 Days Past Due | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	79	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	317	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	1	0
Over 90 days Past Due | Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	3	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	313	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	630	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	1	0
Total Past Due | Other commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	8	13
Total Past Due | CRE - owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	31
Total Past Due | Hotel franchise finance
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	35	31
Total Past Due | Other CRE - non-owner occupied
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	0
Total Past Due | Residential
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	69	88
Total Past Due | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	516	678
Total Past Due | Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	0	42
Total Past Due | Other
Financing Receivable, Nonaccrual [Line Items]
Loans HFI, net of deferred fees and costs	$ 1	$ 1

Loans, Leases and Allowance f_7

Loans, Leases and Allowance for Credit Losses - Credit Quality Indicators (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	$ 5,940		$ 5,940		$ 7,504
Year before current fiscal year	5,849		5,849		12,434
Two years before current fiscal year	10,973		10,973		11,544
Three years before current fiscal year	10,220		10,220		2,876
Four years before current fiscal year	2,433		2,433		1,568
Five or more years before current fiscal year	3,192		3,192		2,523
Revolving Loans Amortized Cost Basis	14,695		14,695		11,829
Cumulative fair value hedging adjustment	44		44		19
Loans HFI, net of deferred fees and costs	53,346		53,346		50,297
Current fiscal year, writeoff			0.1	$ 2.6
Year before current fiscal year, writeoff			18.8	3.4
Two years before current fiscal year, writeoff			6.8	15.1
Three years before current fiscal year, writeoff			28.7	3.9
Four years before current fiscal year, writeoff			3.5	0.1
Five years before current fiscal year, writeoff			2.2	0.4
Revolving Loans Amortized Cost Basis, Writeoff			0.8	0.4
Charge-offs	27.8	$ 8.5	60.9	25.9
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	5,777		5,777		7,139
Year before current fiscal year	5,512		5,512		12,265
Two years before current fiscal year	10,526		10,526		11,211
Three years before current fiscal year	10,037		10,037		2,757
Four years before current fiscal year	2,362		2,362		1,433
Five or more years before current fiscal year	3,133		3,133		2,387
Revolving Loans Amortized Cost Basis	14,625		14,625		11,793
Loans HFI, net of deferred fees and costs	51,972		51,972		48,985
Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	138		138		293
Year before current fiscal year	101		101		38
Two years before current fiscal year	174		174		95
Three years before current fiscal year	50		50		54
Four years before current fiscal year	12		12		63
Five or more years before current fiscal year	2		2		70
Revolving Loans Amortized Cost Basis	25		25		28
Loans HFI, net of deferred fees and costs	502		502		641
Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	25		25		72
Year before current fiscal year	236		236		131
Two years before current fiscal year	273		273		238
Three years before current fiscal year	133		133		65
Four years before current fiscal year	59		59		72
Five or more years before current fiscal year	57		57		66
Revolving Loans Amortized Cost Basis	45		45		8
Loans HFI, net of deferred fees and costs	828		828		652
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	56		56		582
Year before current fiscal year	490		490		323
Two years before current fiscal year	314		314		7
Three years before current fiscal year	5		5		289
Four years before current fiscal year	284		284		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	6,724		6,724		5,417
Loans HFI, net of deferred fees and costs	7,873		7,873		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	0	0
Warehouse lending | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	56		56		582
Year before current fiscal year	490		490		323
Two years before current fiscal year	314		314		7
Three years before current fiscal year	5		5		289
Four years before current fiscal year	284		284		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	6,714		6,714		5,391
Loans HFI, net of deferred fees and costs	7,863		7,863		6,592
Warehouse lending | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	10		10		26
Loans HFI, net of deferred fees and costs	10		10		26
Warehouse lending | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	0		0		0
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	98		98		102
Year before current fiscal year	111		111		174
Two years before current fiscal year	253		253		176
Three years before current fiscal year	169		169		180
Four years before current fiscal year	173		173		74
Five or more years before current fiscal year	863		863		848
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1,667		1,667		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	0	0
Municipal & nonprofit | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	98		98		102
Year before current fiscal year	111		111		167
Two years before current fiscal year	246		246		176
Three years before current fiscal year	169		169		169
Four years before current fiscal year	162		162		68
Five or more years before current fiscal year	858		858		848
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1,644		1,644		1,530
Municipal & nonprofit | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		7
Two years before current fiscal year	7		7		0
Three years before current fiscal year	0		0		11
Four years before current fiscal year	11		11		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	18		18		18
Municipal & nonprofit | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		6
Five or more years before current fiscal year	5		5		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	5		5		6
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1,001		1,001		778
Year before current fiscal year	603		603		856
Two years before current fiscal year	477		477		219
Three years before current fiscal year	146		146		27
Four years before current fiscal year	0		0		66
Five or more years before current fiscal year	68		68		38
Revolving Loans Amortized Cost Basis	925		925		824
Loans HFI, net of deferred fees and costs	3,220		3,220		2,808
Current fiscal year, writeoff			0	1.8
Year before current fiscal year, writeoff			1.5	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			3.5	0
Five years before current fiscal year, writeoff			0	0
Revolving Loans Amortized Cost Basis, Writeoff			0	0
Charge-offs	3.5	0	5	1.8
Tech & innovation | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	986		986		758
Year before current fiscal year	571		571		774
Two years before current fiscal year	376		376		206
Three years before current fiscal year	132		132		22
Four years before current fiscal year	0		0		66
Five or more years before current fiscal year	68		68		38
Revolving Loans Amortized Cost Basis	867		867		816
Loans HFI, net of deferred fees and costs	3,000		3,000		2,680
Tech & innovation | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	4		4		5
Year before current fiscal year	31		31		30
Two years before current fiscal year	29		29		12
Three years before current fiscal year	11		11		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	13		13		1
Loans HFI, net of deferred fees and costs	88		88		48
Tech & innovation | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	11		11		15
Year before current fiscal year	1		1		52
Two years before current fiscal year	72		72		1
Three years before current fiscal year	3		3		5
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	45		45		7
Loans HFI, net of deferred fees and costs	132		132		80
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	22		22		154
Year before current fiscal year	93		93		62
Two years before current fiscal year	99		99		21
Three years before current fiscal year	38		38		3
Four years before current fiscal year	3		3		1
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	651		651		604
Loans HFI, net of deferred fees and costs	906		906		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	0	0
Equity fund resources | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	21		21		154
Year before current fiscal year	93		93		62
Two years before current fiscal year	99		99		21
Three years before current fiscal year	38		38		3
Four years before current fiscal year	3		3		1
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	651		651		604
Loans HFI, net of deferred fees and costs	905		905		845
Equity fund resources | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	0		0		0
Equity fund resources | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		1		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1		1		0
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	2,155		2,155		1,701
Year before current fiscal year	1,135		1,135		1,480
Two years before current fiscal year	922		922		619
Three years before current fiscal year	397		397		187
Four years before current fiscal year	111		111		81
Five or more years before current fiscal year	188		188		196
Revolving Loans Amortized Cost Basis	4,165		4,165		3,188
Loans HFI, net of deferred fees and costs	9,073		9,073		7,452
Current fiscal year, writeoff			0	0.8
Year before current fiscal year, writeoff			0.2	3.3
Two years before current fiscal year, writeoff			0.8	10
Three years before current fiscal year, writeoff			4.6	3.9
Four years before current fiscal year, writeoff			0	0.1
Five years before current fiscal year, writeoff			0.3	0.2
Revolving Loans Amortized Cost Basis, Writeoff			0.8	0.4
Charge-offs	0.7	5.4	6.7	18.7
Other commercial and industrial | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	2,143		2,143		1,610
Year before current fiscal year	1,048		1,048		1,454
Two years before current fiscal year	914		914		559
Three years before current fiscal year	379		379		185
Four years before current fiscal year	110		110		77
Five or more years before current fiscal year	184		184		196
Revolving Loans Amortized Cost Basis	4,163		4,163		3,186
Loans HFI, net of deferred fees and costs	8,941		8,941		7,267
Other commercial and industrial | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		90
Year before current fiscal year	0		0		1
Two years before current fiscal year	6		6		1
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	1		1		0
Revolving Loans Amortized Cost Basis	2		2		1
Loans HFI, net of deferred fees and costs	9		9		93
Other commercial and industrial | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	12		12		1
Year before current fiscal year	87		87		25
Two years before current fiscal year	2		2		59
Three years before current fiscal year	18		18		2
Four years before current fiscal year	1		1		4
Five or more years before current fiscal year	3		3		0
Revolving Loans Amortized Cost Basis	0		0		1
Loans HFI, net of deferred fees and costs	123		123		92
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	149		149		167
Year before current fiscal year	166		166		345
Two years before current fiscal year	376		376		326
Three years before current fiscal year	309		309		164
Four years before current fiscal year	149		149		133
Five or more years before current fiscal year	498		498		483
Revolving Loans Amortized Cost Basis	18		18		40
Loans HFI, net of deferred fees and costs	1,665		1,665		1,658
Current fiscal year, writeoff			0.1	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			0.2	0
Revolving Loans Amortized Cost Basis, Writeoff			0	0
Charge-offs	0.3	0	0.3	0
CRE - owner occupied | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	149		149		165
Year before current fiscal year	166		166		344
Two years before current fiscal year	361		361		322
Three years before current fiscal year	307		307		163
Four years before current fiscal year	149		149		132
Five or more years before current fiscal year	493		493		444
Revolving Loans Amortized Cost Basis	18		18		40
Loans HFI, net of deferred fees and costs	1,643		1,643		1,610
CRE - owner occupied | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	5		5		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		1
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	5		5		1
CRE - owner occupied | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		2
Year before current fiscal year	0		0		1
Two years before current fiscal year	10		10		4
Three years before current fiscal year	2		2		1
Four years before current fiscal year	0		0		1
Five or more years before current fiscal year	5		5		38
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	17		17		47
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	679		679		651
Year before current fiscal year	562		562		1,543
Two years before current fiscal year	1,379		1,379		680
Three years before current fiscal year	478		478		95
Four years before current fiscal year	33		33		497
Five or more years before current fiscal year	423		423		257
Revolving Loans Amortized Cost Basis	132		132		132
Loans HFI, net of deferred fees and costs	3,686		3,686		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	0	0	2.9	0
Hotel franchise finance | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	656		656		593
Year before current fiscal year	530		530		1,535
Two years before current fiscal year	1,350		1,350		566
Three years before current fiscal year	439		439		95
Four years before current fiscal year	33		33		419
Five or more years before current fiscal year	388		388		165
Revolving Loans Amortized Cost Basis	132		132		132
Loans HFI, net of deferred fees and costs	3,528		3,528		3,505
Hotel franchise finance | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	23		23		34
Year before current fiscal year	32		32		0
Two years before current fiscal year	0		0		66
Three years before current fiscal year	39		39		0
Four years before current fiscal year	0		0		35
Five or more years before current fiscal year	0		0		68
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	94		94		203
Hotel franchise finance | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		24
Year before current fiscal year	0		0		8
Two years before current fiscal year	29		29		48
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		43
Five or more years before current fiscal year	35		35		24
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	64		64		147
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	915		915		2,024
Year before current fiscal year	1,678		1,678		1,784
Two years before current fiscal year	1,931		1,931		863
Three years before current fiscal year	664		664		501
Four years before current fiscal year	372		372		208
Five or more years before current fiscal year	304		304		207
Revolving Loans Amortized Cost Basis	534		534		387
Loans HFI, net of deferred fees and costs	6,398		6,398		5,974
Current fiscal year, writeoff			0	0
Year before current fiscal year, writeoff			17.1	0
Two years before current fiscal year, writeoff			4.5	5.1
Three years before current fiscal year, writeoff			22.7	0
Four years before current fiscal year, writeoff			0	0
Five years before current fiscal year, writeoff			0	0.1
Revolving Loans Amortized Cost Basis, Writeoff			0	0
Charge-offs	21.7	3	44.3	5.2
Other CRE - non-owner occupied | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	804		804		1,832
Year before current fiscal year	1,494		1,494		1,784
Two years before current fiscal year	1,712		1,712		754
Three years before current fiscal year	583		583		457
Four years before current fiscal year	358		358		166
Five or more years before current fiscal year	303		303		206
Revolving Loans Amortized Cost Basis	534		534		387
Loans HFI, net of deferred fees and costs	5,788		5,788		5,586
Other CRE - non-owner occupied | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	111		111		164
Year before current fiscal year	38		38		0
Two years before current fiscal year	115		115		16
Three years before current fiscal year	0		0		43
Four years before current fiscal year	1		1		28
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	265		265		251
Other CRE - non-owner occupied | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		28
Year before current fiscal year	146		146		0
Two years before current fiscal year	104		104		93
Three years before current fiscal year	81		81		1
Four years before current fiscal year	13		13		14
Five or more years before current fiscal year	1		1		1
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	345		345		137
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	330		330		325
Year before current fiscal year	246		246		3,599
Two years before current fiscal year	3,430		3,430		8,018
Three years before current fiscal year	7,679		7,679		823
Four years before current fiscal year	782		782		274
Five or more years before current fiscal year	446		446		209
Revolving Loans Amortized Cost Basis	26		26		20
Cumulative fair value hedging adjustment	44		44		19
Loans HFI, net of deferred fees and costs	12,983		12,983		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	0	0
Residential | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	330		330		324
Year before current fiscal year	245		245		3,573
Two years before current fiscal year	3,392		3,392		7,985
Three years before current fiscal year	7,650		7,650		819
Four years before current fiscal year	778		778		270
Five or more years before current fiscal year	439		439		207
Revolving Loans Amortized Cost Basis	26		26		20
Loans HFI, net of deferred fees and costs	12,860		12,860		13,198
Residential | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	0		0		0
Residential | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		1
Year before current fiscal year	1		1		26
Two years before current fiscal year	38		38		33
Three years before current fiscal year	29		29		4
Four years before current fiscal year	4		4		4
Five or more years before current fiscal year	7		7		2
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	79		79		70
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		1		2
Year before current fiscal year	23		23		8
Two years before current fiscal year	15		15		227
Three years before current fiscal year	206		206		534
Four years before current fiscal year	471		471		231
Five or more years before current fiscal year	321		321		221
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1,037		1,037		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	0	0
Residential - EBO | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		1		2
Year before current fiscal year	23		23		8
Two years before current fiscal year	15		15		227
Three years before current fiscal year	206		206		534
Four years before current fiscal year	471		471		231
Five or more years before current fiscal year	321		321		221
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1,037		1,037		1,223
Residential - EBO | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	0		0		0
Residential - EBO | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	0		0		0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	526		526		1,014
Year before current fiscal year	741		741		2,250
Two years before current fiscal year	1,768		1,768		385
Three years before current fiscal year	127		127		62
Four years before current fiscal year	43		43		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	1,460		1,460		1,151
Loans HFI, net of deferred fees and costs	4,665		4,665		4,862
Current fiscal year, writeoff			0	0
Year before current fiscal year, writeoff			0	0
Two years before current fiscal year, writeoff			1.5	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	1.5	0	1.5	0
Construction and land development | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	526		526		1,013
Year before current fiscal year	740		740		2,231
Two years before current fiscal year	1,738		1,738		385
Three years before current fiscal year	127		127		10
Four years before current fiscal year	2		2		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	1,460		1,460		1,151
Loans HFI, net of deferred fees and costs	4,593		4,593		4,790
Construction and land development | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	12		12		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	12		12		0
Construction and land development | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		1
Year before current fiscal year	1		1		19
Two years before current fiscal year	18		18		0
Three years before current fiscal year	0		0		52
Four years before current fiscal year	41		41		0
Five or more years before current fiscal year	0		0		0
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	60		60		72
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	8		8		4
Year before current fiscal year	1		1		10
Two years before current fiscal year	9		9		3
Three years before current fiscal year	2		2		11
Four years before current fiscal year	12		12		3
Five or more years before current fiscal year	81		81		64
Revolving Loans Amortized Cost Basis	60		60		66
Loans HFI, net of deferred fees and costs	173		173		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			0.2	0.1
Revolving Loans Amortized Cost Basis, Writeoff			0	0
Charge-offs	0.1	$ 0.1	0.2	$ 0.2
Other | Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	7		7		4
Year before current fiscal year	1		1		10
Two years before current fiscal year	9		9		3
Three years before current fiscal year	2		2		11
Four years before current fiscal year	12		12		3
Five or more years before current fiscal year	79		79		62
Revolving Loans Amortized Cost Basis	60		60		66
Loans HFI, net of deferred fees and costs	170		170		159
Other | Special mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	0		0		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	1		1		1
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	1		1		1
Other | Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current fiscal year	1		1		0
Year before current fiscal year	0		0		0
Two years before current fiscal year	0		0		0
Three years before current fiscal year	0		0		0
Four years before current fiscal year	0		0		0
Five or more years before current fiscal year	1		1		1
Revolving Loans Amortized Cost Basis	0		0		0
Loans HFI, net of deferred fees and costs	$ 2		$ 2		$ 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 89	$ 63	$ 223	$ 143
% of Total Class of Financing Receivable	0.20%	0.10%	0.40%	0.30%
Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 2
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	44	49	121
Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	2	0	2	0
Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	87	19	172	20
Tech & innovation
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 2	$ 7	$ 31	$ 9
% of Total Class of Financing Receivable	0.10%	0.30%	1%	0.40%
Tech & innovation | Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 2
Tech & innovation | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0	0	0
Tech & innovation | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	2	0	2	0
Tech & innovation | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	7	29	7
Other commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 87	$ 13	$ 95	$ 36
% of Total Class of Financing Receivable	1%	0.20%	1%	0.60%
Other commercial and industrial | Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 0	$ 0	$ 0	$ 0
Other commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	1	8	24
Other commercial and industrial | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	0	0	0	0
Other commercial and industrial | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis	$ 87	12	87	12
CRE - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 3		$ 3
% of Total Class of Financing Receivable		0.20%		0.20%
CRE - owner occupied | Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0		$ 0
CRE - owner occupied | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		3		3
CRE - owner occupied | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0		0
CRE - owner occupied | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0		0
Other CRE - non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 20	$ 56	$ 48
% of Total Class of Financing Receivable		0.30%	0.90%	0.80%
Other CRE - non-owner occupied | Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0	$ 0	$ 0
Other CRE - non-owner occupied | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		20	0	48
Other CRE - non-owner occupied | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0	0	0
Other CRE - non-owner occupied | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0	56	0
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis			$ 41
% of Total Class of Financing Receivable			0.90%
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			41
Construction and land development | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis			0
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		$ 20		$ 46
% of Total Class of Financing Receivable		0.50%		1.10%
Hotel franchise finance | Payment Delay and Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0		$ 0
Hotel franchise finance | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		20		46
Hotel franchise finance | Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		0		0
Hotel franchise finance | Payment Delay
Financing Receivable, Troubled Debt Restructuring [Line Items]
Amortized cost basis		$ 0		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 | Interest Rate Reduction
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 - Collateral Dependent Loans (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	$ 52,989	$ 49,960
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	490	389
Real Estate Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	480	354
Other Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	10	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	2	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	2	0
Other commercial and industrial | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	3	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	3	29
CRE - owner occupied | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	12	43
CRE - owner occupied | Real Estate Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	12	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	64	104
Hotel franchise finance | Real Estate Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	64	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	345	136
Other CRE - non-owner occupied | Real Estate Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	345	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	59	71
Construction and land development | Real Estate Collateral | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Net loans HFI	59	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 _10

Loans, Leases and Allowance for Credit Losses - Allowances for Credit Losses (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 351.8	$ 321.1	$ 336.7	$ 309.7
Provision for (Recovery of) Credit Losses	31.4	14.3	79.1	39.1
Charge-offs	27.8	8.5	60.9	25.9
Recoveries	(1.2)	(0.5)	(1.7)	(4.5)
Ending balance	356.6	327.4	356.6	327.4
Off-Balance-Sheet, Credit Loss, Liability [Roll Forward]
Balance, beginning of period	35.9	41.1	31.6	47
Provision for (recovery of) credit losses	1.7	(3.2)	6	(9.1)
Balance, end of period	37.6	37.9	37.6	37.9
Warehouse lending
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	6.5	5.2	5.8	8.4
Provision for (Recovery of) Credit Losses	(0.6)	(0.5)	0.1	(3.7)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	5.9	4.7	5.9	4.7
Municipal & nonprofit
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	14	16.5	14.7	15.9
Provision for (Recovery of) Credit Losses	(0.3)	0.2	(1)	0.8
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	13.7	16.7	13.7	16.7
Tech & innovation
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	45	33.6	42.1	30.8
Provision for (Recovery of) Credit Losses	21.2	(1.6)	25.6	3
Charge-offs	3.5	0	5	1.8
Recoveries	0	0	0	0
Ending balance	62.7	32	62.7	32
Equity fund resources
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1.7	1.7	1.3	6.4
Provision for (Recovery of) Credit Losses	0.2	0	0.6	(4.7)
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	1.9	1.7	1.9	1.7
Other commercial and industrial
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	84.3	51.8	81.4	85.9
Provision for (Recovery of) Credit Losses	1.9	22.8	10.3	(2)
Charge-offs	0.7	5.4	6.7	18.7
Recoveries	(0.4)	(0.3)	(0.9)	(4.3)
Ending balance	85.9	69.5	85.9	69.5
CRE - owner occupied
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5	8	6	7.1
Provision for (Recovery of) Credit Losses	0.1	(0.3)	(0.9)	0.6
Charge-offs	0.3	0	0.3	0
Recoveries	0	0	0	0
Ending balance	4.8	7.7	4.8	7.7
Hotel franchise finance
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	39.6	45.7	33.4	46.9
Provision for (Recovery of) Credit Losses	(1.2)	(5.1)	7.9	(6.3)
Charge-offs	0	0	2.9	0
Recoveries	(0.7)	0	(0.7)	0
Ending balance	39.1	40.6	39.1	40.6
Other CRE - non-owner occupied
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	104.5	90.1	96	47.4
Provision for (Recovery of) Credit Losses	10.7	8.6	41.8	53.5
Charge-offs	21.7	3	44.3	5.2
Recoveries	0	0	0	0
Ending balance	93.5	95.7	93.5	95.7
Residential
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	18.8	33.9	23.1	30.4
Provision for (Recovery of) Credit Losses	0.4	(7.9)	(3.9)	(4.4)
Charge-offs	0	0	0	0
Recoveries	0	(0.1)	0	(0.1)
Ending balance	19.2	26.1	19.2	26.1
Residential - EBO
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0	0	0
Provision for (Recovery of) Credit Losses	0	0	0	0
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Ending balance	0	0	0	0
Construction and land development
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	29.9	31.7	30.4	27.4
Provision for (Recovery of) Credit Losses	(1.3)	(2.6)	(1.8)	1.7
Charge-offs	1.5	0	1.5	0
Recoveries	0	0	0	0
Ending balance	27.1	29.1	27.1	29.1
Other
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2.5	2.9	2.5	3.1
Provision for (Recovery of) Credit Losses	0.3	0.7	0.4	0.6
Charge-offs	0.1	0.1	0.2	0.2
Recoveries	(0.1)	(0.1)	(0.1)	(0.1)
Ending balance	$ 2.8	$ 3.6	$ 2.8	$ 3.6

Loans, Leases and Allowance _11

Loans, Leases and Allowance for Credit Losses - Disaggregation of the Company's ACL on Funded Loans and Loan Balances (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	$ 52,606		$ 49,723
Individually Evaluated for Credit Loss	740		574
Loans HFI, net of deferred fees and costs	53,346		50,297
Collectively Evaluated for Credit Loss	318.5		315.1
Individually Evaluated for Credit Loss	38.1		21.6
Total	356.6	$ 351.8	336.7	$ 327.4	$ 321.1	$ 309.7
Warehouse lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	7,873		6,618
Individually Evaluated for Credit Loss	0		0
Loans HFI, net of deferred fees and costs	7,873		6,618
Collectively Evaluated for Credit Loss	5.9		5.8
Individually Evaluated for Credit Loss	0		0
Total	5.9	6.5	5.8	4.7	5.2	8.4
Municipal & nonprofit
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,661		1,548
Individually Evaluated for Credit Loss	6		6
Loans HFI, net of deferred fees and costs	1,667		1,554
Collectively Evaluated for Credit Loss	13.1		13.7
Individually Evaluated for Credit Loss	0.6		1
Total	13.7	14	14.7	16.7	16.5	15.9
Tech & innovation
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	3,089		2,729
Individually Evaluated for Credit Loss	131		79
Loans HFI, net of deferred fees and costs	3,220		2,808
Collectively Evaluated for Credit Loss	32.6		38.3
Individually Evaluated for Credit Loss	30.1		3.8
Total	62.7	45	42.1	32	33.6	30.8
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	906		845
Individually Evaluated for Credit Loss	0		0
Loans HFI, net of deferred fees and costs	906		845
Collectively Evaluated for Credit Loss	1.9		1.3
Individually Evaluated for Credit Loss	0		0
Total	1.9	1.7	1.3	1.7	1.7	6.4
Other commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	8,952		7,362
Individually Evaluated for Credit Loss	121		90
Loans HFI, net of deferred fees and costs	9,073		7,452
Collectively Evaluated for Credit Loss	85.4		64.6
Individually Evaluated for Credit Loss	0.5		16.8
Total	85.9	84.3	81.4	69.5	51.8	85.9
CRE - owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,651		1,613
Individually Evaluated for Credit Loss	14		45
Loans HFI, net of deferred fees and costs	1,665		1,658
Collectively Evaluated for Credit Loss	4.8		6
Individually Evaluated for Credit Loss	0		0
Total	4.8	5	6	7.7	8	7.1
Hotel franchise finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	3,623		3,708
Individually Evaluated for Credit Loss	63		147
Loans HFI, net of deferred fees and costs	3,686		3,855
Collectively Evaluated for Credit Loss	39.1		33.4
Individually Evaluated for Credit Loss	0		0
Total	39.1	39.6	33.4	40.6	45.7	46.9
Other CRE - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	6,053		5,838
Individually Evaluated for Credit Loss	345		136
Loans HFI, net of deferred fees and costs	6,398		5,974
Collectively Evaluated for Credit Loss	86.6		96
Individually Evaluated for Credit Loss	6.9		0
Total	93.5	104.5	96	95.7	90.1	47.4
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	12,983		13,287
Individually Evaluated for Credit Loss	0		0
Loans HFI, net of deferred fees and costs	12,983		13,287
Collectively Evaluated for Credit Loss	19.2		23.1
Individually Evaluated for Credit Loss	0		0
Total	19.2	18.8	23.1	26.1	33.9	30.4
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	1,037		1,223
Individually Evaluated for Credit Loss	0		0
Loans HFI, net of deferred fees and costs	1,037		1,223
Collectively Evaluated for Credit Loss	0		0
Individually Evaluated for Credit Loss	0		0
Total	0	0	0	0	0	0
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	4,606		4,791
Individually Evaluated for Credit Loss	59		71
Loans HFI, net of deferred fees and costs	4,665		4,862
Collectively Evaluated for Credit Loss	27.1		30.4
Individually Evaluated for Credit Loss	0		0
Total	27.1	29.9	30.4	29.1	31.7	27.4
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively Evaluated for Credit Loss	172		161
Individually Evaluated for Credit Loss	1		0
Loans HFI, net of deferred fees and costs	173		161
Collectively Evaluated for Credit Loss	2.8		2.5
Individually Evaluated for Credit Loss	0		0
Total	$ 2.8	$ 2.5	$ 2.5	$ 3.6	$ 2.9	$ 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 1,145	$ 1,007	$ 1,124	$ 1,148
Mortgage servicing rights capitalized upon sale of mortgage loans	223	266	626	653
Carrying value of MSRs sold	(258)	(112)	(655)	(611)
Change in fair value	(62)	98	30	114
Mark to market adjustments	0	0	0	4
Realization of cash flows	(37)	(26)	(114)	(75)
Balance, end of period	1,011	1,233	1,011	1,233
Unpaid principal balance of mortgage loans serviced for others	$ 63,773	$ 70,261	$ 63,773	$ 70,261

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Servicing Assets at Fair Value [Line Items]
MSR UPB of underlying loans	$ 15,500	$ 16,000	$ 42,800	$ 44,300
Remaining receivable balance	41		41		$ 41
Ancillary income associated with the Company's MSR portfolio	59.8	56.4	196.9	173.3
Servicing advances, net	48		48		$ 87
Servicing Contracts
Servicing Assets at Fair Value [Line Items]
Gain (loss) on MSR sales	$ 1.5	$ 0.5	$ 5	$ (8.5)

Mortgage Servicing Rights - Eff

Mortgage Servicing Rights - Effect of Hypothetical Changes in the Fair Value of MSRs (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Transfers and Servicing [Abstract]
Fair value of mortgage servicing rights	$ 1,011	$ 1,145	$ 1,124	$ 1,233	$ 1,007	$ 1,148
Interest rate change of 50 basis points
Adverse change	(84)
Favorable change	81
Discount rate change of 50 basis points
Increase	(21)
Decrease	21
Conditional prepayment rate change of 1%
Increase	(33)
Decrease	36
Cost to service change of 10%
Increase	(12)
Decrease	$ 12

Deposits - Deposits by Type (De

Deposits - Deposits by Type (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Non-interest bearing	$ 24,965	$ 14,520
Demand accounts	13,846	15,916
Savings and money market accounts	19,575	14,791
Retail brokered time deposits over $250,000	1,567	1,478
Other time deposits	8,087	8,628
Time certificates of deposit ($250,000 or more)	4,900	5,800
Total deposits	$ 68,040	$ 55,333

Deposits - Summary of Contractu

Deposits - Summary of Contractual Maturities for Time Deposits (Details) $ in Millions	Sep. 30, 2024 USD ($)
Other Liabilities Disclosure [Abstract]
2024	$ 3,911
2025	5,521
2026	211
2027	8
2028	1
Thereafter	2
Total	$ 9,654

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Wholesale deposits	$ 6,000		$ 6,000		$ 6,600
Reciprocal deposits	13,100		13,100		13,300
Earnings credits or referral fees	26,100		26,100		$ 17,800
Deposits costs, deposits with earnings credits	$ 201.7	$ 123.7	$ 500.4	$ 297.1

Other Borrowings - Company's Bo

Other Borrowings - Company's Borrowings (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt [Line Items]
Federal funds purchased	$ 0	$ 175
FHLB advances	1,500	6,200
Customer repurchase agreements	5	382
Short-term Debt	1,567	6,784
FHLB advances	1,000	0
Credit linked notes, net	428	446
Long-term Debt	1,428	446
Other borrowings	2,995	7,230
Secured borrowings
Debt [Line Items]
Secured borrowings	$ 62	$ 27

Other Borrowings - Additional I

Other Borrowings - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Debt [Line Items]
Weighted average rate on FHLB advances, short-term	5.21%		5.21%		5.67%
Customer repurchase agreements	$ 5		$ 5		$ 382
FHLB advances	$ 1,000		$ 1,000		0
Weighted average rate on FHLB advances	5.31%		5.31%
Gain on extinguishment of debt	$ 0	$ 0	$ 0	$ 13.4
Minimum
Debt [Line Items]
Period of basis point spread			0.10%
Maximum
Debt [Line Items]
Period of basis point spread			0.20%
Customer Repurchase Agreements
Debt [Line Items]
Customer repurchase agreements	5		$ 5		6
Federal Funds Purchased
Debt [Line Items]
Secured borrowing credit line	1,400		1,400
Federal Home Loan Bank Advances
Debt [Line Items]
Additional available credit with the entity	11,700		11,700		6,100
Warehouse Agreement Borrowings
Debt [Line Items]
Additional available credit with the entity	2,300		2,300
Warehouse borrowings	$ 0		$ 0		$ 376
Weighted average borrowing rate					6.72%
Secured Debt
Debt [Line Items]
Weighted average borrowing rate	6.42%		6.42%		6.10%

Other Borrowings - Outstanding

Other Borrowings - Outstanding Credit Linked Noted Issuances (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Credit Linked Notes
Debt [Line Items]
Principal	$ 441	$ 460
Debt Issuance Costs	$ 7	$ 8
Minimum
Debt [Line Items]
Period of basis point spread	0.10%
Maximum
Debt [Line Items]
Period of basis point spread	0.20%
Credit Linked Notes Maturing October 2052 | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	7.80%	7.80%
Principal	$ 86	$ 90
Debt Issuance Costs	$ 2	2
Weighted average borrowing rate	7.80%
Reference pool balance	$ 1,700	$ 1,800
Credit Linked Notes Maturing October 2052 | Minimum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	2.25%
Credit Linked Notes Maturing October 2052 | Maximum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	11%
Credit Linked Notes Maturing April 2052 | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	6%	6%
Principal	$ 172	$ 179
Debt Issuance Costs	$ 3	3
Weighted average borrowing rate	6%
Reference pool balance	$ 3,500	$ 3,600
Credit Linked Notes Maturing April 2052 | Minimum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	2.25%
Credit Linked Notes Maturing April 2052 | Maximum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	15%
Credit Linked Notes Maturing July 2059 | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	4.67%	4.67%
Principal	$ 183	$ 191
Debt Issuance Costs	$ 2	3
Weighted average borrowing rate	4.67%
Reference pool balance	$ 3,600	$ 3,800
Credit Linked Notes Maturing July 2059 | Minimum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	3.15%
Credit Linked Notes Maturing July 2059 | Maximum | Credit Linked Notes
Debt [Line Items]
Period of basis point spread	8.50%

Qualifying Debt - Subordinated

Qualifying Debt - Subordinated Debt Issuances (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Subordinated Debt
Debt Instrument [Line Items]
Principal	$ 825	$ 825
Debt Issuance Costs	$ 5	$ 7
Subordinated Debentures Maturing June 2031
Debt Instrument [Line Items]
Interest rate	3%
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	$ 5	$ 6
Subordinated Debentures Maturing June 2030
Debt Instrument [Line Items]
Interest rate	5.25%
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	$ 0	$ 1

Qualifying Debt (Details)

Qualifying Debt (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($) Trust	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Subordinated debt issuances	$ 819	$ 818
Number of statutory business trusts | Trust	8
Junior subordinated debt	$ 79	$ 77
Junior Subordinated Debt
Debt Instrument [Line Items]
Weighted average interest rate	7.19%	7.93%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 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		12,000,000
Preferred stock dividend rate							4.25%
Preferred stock, par value (dollars per share)	$ 0.0001						$ 0.0001		$ 0.0001
Preferred stock, liquidation value (dollars per share)	25						25		$ 25
Cash dividend (dollars per share)	0.27			$ 0.27			0.27	$ 0.27
Dividends declared per common share (dollars per share)	$ 0.37			$ 0.36			$ 1.11	$ 1.08
Dividends, preferred stock	$ 3.2			$ 3.2			$ 9.6	$ 9.6
Dividends paid	$ 40.7			$ 39.4			$ 122.2	$ 118.2
Cash dividend per share (dollars per share)	$ 0.37	$ 0.37	$ 0.37	$ 0.36	$ 0.36	$ 0.36
Shares withheld (shares)	1,042			139			141,525	151,358
Weighted average price of treasury shares (dollars per share)	$ 75.27			$ 48.56			$ 61.34	$ 72.47
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, liquidation value (dollars per share)	$ 10,000						$ 10,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate grant date fair value	$ 0.3						$ 46.9
Stock-based compensation expense	9.1			$ 7.5			$ 32.6	$ 25.1
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
Restricted Stock | Grant year 2024 | Share-Based Payment Arrangement, Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							1 year
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							3 years
Stock-based compensation expense	0.9			1.4		$ (2.5)	$ 2.5	0.3
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	0.4			0			$ 0.8	0
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1.4			0			1.9	0
Aggregate grant date fair value	$ 0.1						$ 5.7
Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares outstanding (shares)	12,000,000						12,000,000
Retained Earnings
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, preferred stock	$ 3.2			3.2			$ 9.6	9.6
Dividends paid	$ 40.7			$ 39.4			$ 122.2	$ 118.2

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (513)
Net other comprehensive income (loss)	$ 176.7	$ (121.8)	131.4	$ (71.3)
Ending balance	(382)		(382)
Unrealized holding gains (losses) on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(560.9)	(618.3)	(516.6)	(663.7)
Other comprehensive income before reclassifications	183.7	(120.2)	140.5	(94.3)
Amounts reclassified from accumulated other comprehensive income	(6.6)	(0.4)	(7.7)	19.1
Net other comprehensive income (loss)	177.1	(120.6)	132.8	(75.2)
Ending balance	(383.8)	(738.9)	(383.8)	(738.9)
Unrealized holding gains (losses) on junior subordinated debt
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1.8	6.9	2.8	3
Other comprehensive income before reclassifications	(0.3)	(1.2)	(1.3)	2.7
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	(0.3)	(1.2)	(1.3)	2.7
Ending balance	1.5	5.7	1.5	5.7
Impairment loss on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1.2	1.2	1.2	0
Other comprehensive income before reclassifications	0	0	0	1.2
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	0	0	0	1.2
Ending balance	1.2	1.2	1.2	1.2
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(558.2)	(610.5)	(512.9)	(661)
Other comprehensive income before reclassifications	183.3	(121.4)	139.1	(90.4)
Amounts reclassified from accumulated other comprehensive income	(6.6)	(0.4)	(7.7)	19.1
Net other comprehensive income (loss)	176.7	(121.8)	131.4	(71.3)
Ending balance	(381.5)	(732.3)	(381.5)	(732.3)
Unrealized holding losses on SERP
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(0.3)	(0.3)	(0.3)	(0.3)
Other comprehensive income before reclassifications	(0.1)	0	(0.1)	0
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive income (loss)	(0.1)	0	(0.1)	0
Ending balance	$ (0.4)	$ (0.3)	$ (0.4)	$ (0.3)

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Derivative [Line Items]
Cumulative basis adjustment including carrying value of hedged items	$ 38		$ 38		$ 6
Collateral posted by this counterparty	292	$ 72	292	$ 72	$ 216
Designated as Hedging Instrument
Derivative [Line Items]
Interest income related to amortization of cumulative basis adjustment	$ 3	$ 3	$ 8.9	$ 8.9

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Schedule of Derivative Assets at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Value of Hedged Assets	$ 4,836	$ 3,875
Cumulative Fair Value Hedging Increase (Decrease)	38	6
Loans HFI, net of deferred fees and costs	53,346	50,297
Prepayable Fixed Rate Loans
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loans HFI, net of deferred fees and costs	9,400	6,700
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Portfolio layer method derivative instruments	4,500	3,500
Cumulative basis adjustment	$ 44.4	$ 19

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Derivative Instruments, Gain (Loss) (Details) - Interest income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) on Swaps	$ (31.4)	$ 76.5	$ (114.6)	$ 111.2
Gain/(Loss) on Hedged Item	$ 31.2	$ (76)	$ 115.1	$ (110.7)

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Schedule of Fair Value of the Company's Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	$ 33,702	$ 29,912	$ 28,604
Derivative Assets	319	260	257
Derivative Liabilities	103	78	46
Derivative Assets	363	271	137
Derivative Liabilities	65	67	72
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	4,852	3,895	3,899
Derivative Assets	14	19	128
Derivative Liabilities	51	24	0
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	33,702	29,912	28,604
Derivative Assets	83	69	71
Derivative Liabilities	69	76	47
Notional Amount, Margin	0	0	0
Derivative Assets, Margin	280	202	66
Derivative Liabilities, Margin	(4)	(9)	25
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	18	31	148
Derivative Liabilities	70	31	0
Interest rate contracts | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	4,852	3,895	3,899
Derivative Assets	14	19	128
Derivative Liabilities	51	24	0
Interest rate contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	5,317	3,628	3,187
Derivative Assets	28	19	20
Derivative Liabilities	29	20	20
Foreign currency contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	1	0	0
Derivative Liabilities	0	1	0
Foreign currency contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	101	135	74
Derivative Assets	1	1	1
Derivative Liabilities	0	1	0
Forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	20	27	43
Derivative Liabilities	37	55	21
Forward contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	17,889	13,170	9,653
Derivative Assets	20	27	43
Derivative Liabilities	38	55	21
Futures purchase contracts | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	7,400	11,030	13,845
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	2,843	1,822	1,761
Derivative Assets	13	18	3
Derivative Liabilities	2	0	6
Risk participation agreements | Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount	96	72	44
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	56	55	40
Derivative Assets	21	4	4
Derivative Liabilities	$ 0	$ 0	$ 0

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities - Fair Value After Master Netting Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	$ 319	$ 260	$ 257
Derivative asset, subject to master netting arrangement, after offset	225	193	214
Derivative asset, collateral, obligation to return cash, offset	280	202	66
Derivative asset, subject to master netting arrangement, liability offset	(94)	(67)	(43)
Derivative liability, fair value	(103)	(78)	(46)
Derivative liability, subject to master netting arrangement, after offset	(9)	(11)	(3)
Derivative liability, collateral, right to reclaim cash, offset	4	9	(25)
Derivative liability, subject to master netting arrangement, asset offset	94	67	43
Derivative asset, not subject to master netting arrangement	58	30	8
Derivative liability, not subject to master netting arrangement	(13)	(13)	(26)
Derivative asset, fair value, gross asset including not subject to master netting arrangement	377	290	265
Derivative asset, fair value, offset against collateral, net of not subject to master netting arrangement	283	223	222
Derivative liability, fair value, gross liability including not subject to master netting arrangement	(116)	(91)	(72)
Derivative liability, fair value, offset against collateral, net of not subject to master netting arrangement	(22)	(24)	(29)
Forward contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	20	27	43
Derivative asset, subject to master netting arrangement, after offset	20	27	43
Derivative liability, fair value	(37)	(55)	(21)
Derivative liability, subject to master netting arrangement, after offset	(37)	(55)	(21)
Derivative liability, not subject to master netting arrangement	(1)	0	0
Interest rate contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Assets	18	31	148
Derivative asset, subject to master netting arrangement, after offset	18	31	148
Derivative liability, fair value	(70)	(31)	0
Derivative liability, subject to master netting arrangement, after offset	(70)	(31)	0
Derivative asset, not subject to master netting arrangement	24	7	0
Derivative liability, not subject to master netting arrangement	(10)	(13)	(20)
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	0	(1)	0
Derivative liability, subject to master netting arrangement, after offset	0	(1)	0
Derivative asset, not subject to master netting arrangement	0	1	1
Interest rate lock commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset, not subject to master netting arrangement	13	18	3
Derivative liability, not subject to master netting arrangement	(2)	0	(6)
Equity warrants
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset, not subject to master netting arrangement	$ 21	$ 4	$ 4

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities - Net Gain (Loss) on Derivatives Included in Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ (79.2)	$ 54.8	$ (65.5)	$ 72.3
Net gain on loan origination and sale activities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ (79.1)	$ 54.8	$ (65.5)	$ 72.3
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	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	$ 53.1	$ 104	$ (13)	$ (121.7)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net loan servicing revenue	Net loan servicing revenue	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	$ 2.6	$ (5.2)	$ (7.8)	$ (4.9)
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	(87.3)	68.7	(61.3)	87.5
Forward Contracts | Loan servicing fees, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	17.9	(19.2)	(9.6)	(34)
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	6.7	(8.4)	3.8	(11.8)
Interest rate contracts | Loan servicing fees, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	42.2	(82.4)	(10.8)	(100)
Other Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	(1.1)	(0.3)	(0.2)	1.5
Future
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Total change in fair value of derivatives	$ (7)	$ (2.4)	$ 7.4	$ 12.3

Earnings per Share (Details)

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares - basic (shares)	108.7	108.3	108.6	108.3
Dilutive effect of stock award (shares)	0.8	0.2	0.6	0.1
Weighted average shares - diluted (shares)	109.5	108.5	109.2	108.4
Net income available to common stockholders	$ 196.6	$ 213.4	$ 561.2	$ 564.9
Earnings per share:
Basic (dollars per share)	$ 1.81	$ 1.97	$ 5.17	$ 5.22
Diluted (dollars per share)	$ 1.80	$ 1.97	$ 5.14	$ 5.21
Restricted Stock
Earnings per share:
Antidilutive restricted stock outstanding (in shares)	0	0	0	0.1

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Effective tax rate	20.70%	22.10%	22%	20.50%
Deferred tax assets, net	$ 254		$ 254		$ 287
Decrease in DTA			33
Deferred tax valuation allowance	0		0		0
Investments in LIHTC and renewable energy	560		560		573
Investment-related Liabilities	305		305		$ 322
Investment-related tax credit	21	$ 25.6	59.7	$ 65.9
Amortization of tax credit investments	$ 19.6	$ 27.9	$ 55.3	$ 66.9

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Letters of credit expiration period			1 year
Conditional commitments	$ 37.6	$ 37.9	$ 37.6	$ 37.9	$ 31.6	$ 35.9	$ 41.1	$ 47
Other conditional commitments	$ 20		$ 20		$ 32
Percentage of CRE loans occupied by owners	16%		16%		16%
Lease cost	$ 7.1	7	$ 21.2	21.5
Lessee, operating lease, other cost	1.7	$ 1.5	$ 4.8	$ 4
Commercial and industrial | Loans Receivable | Credit Concentration Risk
Loss Contingencies [Line Items]
Percent of commercial real estate related loans			42%		38%
Commercial Real Estate Portfolio Segment | Loans Receivable | Credit Concentration Risk
Loss Contingencies [Line Items]
Percent of commercial real estate related loans			31%		33%
Unfunded Loan Commitment
Loss Contingencies [Line Items]
Conditional commitments	$ 38		$ 38		$ 32

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Total amount	$ 14,083	$ 13,931
Commitments to extend credit
Other Commitments [Line Items]
Unsecured loan commitments	916	989
Total amount	13,299	13,291
Credit card guarantees
Other Commitments [Line Items]
Total amount	495	418
Standby letters of credit
Other Commitments [Line Items]
Unsecured letters of credit	2	4
Total amount	$ 289	$ 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes included in OCI, net of tax	$ (0.3)	$ (1.2)	$ (1.3)	$ 2.7
Junior Subordinated Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized (losses) gains	$ (0.4)	$ (1.6)	$ (1.8)	$ 3.6

Fair Value Accounting - Fair Va

Fair Value Accounting - Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	$ 14,750		$ 11,165
Investment securities - equity	117		126
Fair value of mortgage servicing rights	1,011	$ 1,145	1,124	$ 1,233	$ 1,007	$ 1,148
Junior subordinated debt	65		63
Cumulative basis adjustment, including carrying value of hedged items increase (decrease)	38		6
Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	5,629		1,972
U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	5,600		4,853
Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	1,042		1,117
Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	870		858
Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	653		530
CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	508		1,399
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	379		367
Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	69		69
Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	91		100
CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	26		26
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	14,750		11,165
Investment securities - equity	117		126
Loans HFS	2,292		1,380
Fair value of mortgage servicing rights	1,011		1,124
Derivative asset	97		88
Derivative liabilities	120		100
Fair Value, Recurring | Residential MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	5,629		1,972
Fair Value, Recurring | U.S. Treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	5,600		4,853
Fair Value, Recurring | Private label residential MBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	1,042		1,117
Fair Value, Recurring | Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	870		858
Fair Value, Recurring | Commercial MBS issued by GSEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	653		530
Fair Value, Recurring | CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	508		1,399
Fair Value, Recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	379		367
Fair Value, Recurring | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	69		69
Fair Value, Recurring | Preferred Stock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	91		100
Fair Value, Recurring | CRA investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	26		26
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]
AFS	5,602		4,881
Investment securities - equity	117		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	280		202
Margin, liability	(4)		(9)
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]
AFS	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]
AFS	5,600		4,853
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]
AFS	0		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]
AFS	0		0
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]
AFS	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]
AFS	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]
AFS	0		0
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]
AFS	2		28
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	91		100
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	26		26
Fair Value, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	9,148		6,284
Investment securities - equity	0		0
Loans HFS	2,290		1,377
Fair value of mortgage servicing rights	0		0
Derivative asset	63		66
Junior subordinated debt	0		0
Derivative liabilities	118		100
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]
AFS	5,629		1,972
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]
AFS	0		0
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]
AFS	1,042		1,117
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	870		858
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]
AFS	653		530
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	508		1,399
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]
AFS	379		367
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	67		41
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 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 Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	0		0
Investment securities - equity	0		0
Loans HFS	2		3
Fair value of mortgage servicing rights	1,011		1,124
Derivative asset	34		22
Junior subordinated debt	65		63
Derivative liabilities	2		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]
AFS	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]
AFS	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]
AFS	0		0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Tax-exempt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	0		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]
AFS	0		0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | CLO
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	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]
AFS	0		0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
AFS	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, 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 Accounting - Change

Fair Value Accounting - Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Changes included in OCI, net of tax	$ (0.3)	$ (1.2)	$ (1.3)	$ 2.7
Junior subordinated debt	65		65		$ 63
Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Junior subordinated debt	65		65		$ 63
Junior Subordinated Debt
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value	$ (0.4)	(1.6)	$ (1.8)	3.6
Debt Instrument, measurement input	0.0775		0.0775		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	$ 65		$ 65		$ 63
Junior Subordinated Debt | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	(64.2)	(57.3)	(62.8)	(62.5)
Ending balance	$ (64.6)	$ (58.9)	$ (64.6)	$ (58.9)

Fair Value Accounting - Chang_2

Fair Value Accounting - Change in Level 3 Assets Unobservable Inputs (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Mark to market adjustments	$ 0	$ 0	$ 0	$ 4
Servicing Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	1,145	1,007	1,124	1,148
Purchases and additions	223	266	626	653
Sales and payments	(258)	(112)	(655)	(611)
Change in fair value	(62)	98	30	114
Realization of cash flows	(37)	(26)	(114)	(75)
Balance, end of period	1,011	1,233	1,011	1,233
Change in unrealized gains for the period	(61)	97	(25)	128
Interest rate lock commitments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	8	2	18	2
Purchases and additions	5,387	4,616	14,024	11,772
Settlement of IRLCs upon acquisition or origination of loans HFS	(5,395)	(4,619)	(14,042)	(11,773)
Change in fair value	10	(2)	10	(4)
Balance, end of period	10	(3)	10	(3)
Change in unrealized gains for the period	$ 10	$ (3)	$ 10	$ (3)

Fair Value Accounting - Unobser

Fair Value Accounting - Unobservable Inputs (Details)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 481,000,000	$ 379,000,000
Other assets acquired through foreclosure	8,000,000	8,000,000
Fair Value, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	481,000,000	379,000,000
Other assets acquired through foreclosure	$ 8,000,000	$ 8,000,000
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	0.0037	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	2.8	3.2
Minimum | Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.69	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	0.0337	0.0253
Maximum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.247	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	6.6	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	0.0267	0.0213
Weighted Average | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.181	0.174
Weighted Average | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.200	0.200
Weighted Average | Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	0.00362	0.00356
Weighted Average | Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing asset, measurement input	83	95
Weighted Average | Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	4.2	4.3
Weighted Average | Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, measurement input	0.83	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	Sep. 30, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair Value, option, loans held as assets, current through 89 days	$ 2,292	$ 1,379
UPB, option, loans held as assets, current through 89 days	2,210	1,319
Fair value, option, loans held as assets, current through 89 days, aggregate difference	82	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	2,292	1,380
Financing receivable, UPB	2,210	1,321
Fair value option, aggregate difference	$ 82	$ 59

Fair Value Accounting - Assets

Fair Value Accounting - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value, Nonrecurring - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 481	$ 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	481	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	Sep. 30, 2024	Dec. 31, 2023
Financial assets
HTM	$ 1,525	$ 1,429
AFS	14,750	11,165
Investment securities - equity	117	126
Loans HFS	2,327	1,402
Net loans HFI	52,989	49,960
Mortgage servicing rights	1,011	1,124
Accrued interest receivable	5	5
Financial liabilities
Total deposits	68,040	55,333
Other borrowings	2,995	7,230
Junior subordinated debt	65	63
Fair Value, Nonrecurring | Carrying Amount
Financial assets
HTM	1,525	1,429
Net loans HFI	52,989	49,960
Accrued interest receivable	367	370
Financial liabilities
Total deposits	68,040	55,333
Other borrowings	2,995	7,230
Junior subordinated debt	898	895
Accrued interest payable	167	151
Fair Value, Nonrecurring | Estimate of Fair Value Measurement
Financial assets
HTM	1,371	1,251
Net loans HFI	51,739	46,877
Accrued interest receivable	367	370
Financial liabilities
Total deposits	68,099	55,379
Other borrowings	2,966	7,192
Junior subordinated debt	851	810
Accrued interest payable	167	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	1,371	1,251
Net loans HFI	0	0
Accrued interest receivable	367	370
Financial liabilities
Total deposits	68,099	55,379
Other borrowings	2,966	7,192
Junior subordinated debt	773	734
Accrued interest payable	167	151
Fair Value, Nonrecurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Financial assets
HTM	0	0
Net loans HFI	51,739	46,877
Accrued interest receivable	0	0
Financial liabilities
Total deposits	0	0
Other borrowings	0	0
Junior subordinated debt	78	76
Accrued interest payable	0	0
Fair Value, Recurring
Financial assets
AFS	14,750	11,165
Investment securities - equity	117	126
Derivative asset	97	88
Financial liabilities
Derivative liabilities	120	100
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
AFS	5,602	4,881
Investment securities - equity	117	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	9,148	6,284
Investment securities - equity	0	0
Derivative asset	63	66
Financial liabilities
Junior subordinated debt	0	0
Derivative liabilities	118	100
Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Financial assets
AFS	0	0
Investment securities - equity	0	0
Derivative asset	34	22
Financial liabilities
Junior subordinated debt	65	63
Derivative liabilities	2	0
Fair Value, Recurring | Carrying Amount
Financial assets
AFS	14,750	11,165
Investment securities - equity	117	126
Derivative asset	97	84
Loans HFS	2,327	1,402
Mortgage servicing rights	1,011	1,124
Financial liabilities
Derivative liabilities	120	100
Fair Value, Recurring | Estimate of Fair Value Measurement
Financial assets
AFS	14,750	11,165
Investment securities - equity	117	126
Derivative asset	97	88
Loans HFS	2,326	1,402
Mortgage servicing rights	1,011	1,124
Financial liabilities
Derivative liabilities	120	100
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
AFS	5,602	4,881
Investment securities - equity	117	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	9,148	6,284
Investment securities - equity	0	0
Derivative asset	63	66
Loans HFS	2,303	1,379
Mortgage servicing rights	0	0
Financial liabilities
Derivative liabilities	118	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	34	22
Loans HFS	23	23
Mortgage servicing rights	1,011	1,124
Financial liabilities
Derivative liabilities	$ 2	$ 0

Fair Value Accounting - Additio

Fair Value Accounting - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 14,750,000,000	$ 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	5,600,000,000	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	$ 9,000,000	$ 10,000,000
Junior Subordinated Debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, measurement input	0.0775	0.0892
Percentage of LIBOR	4.59%	5.33%
Period of basis point spread	3.16%	3.59%
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans HFI	$ 481,000,000	$ 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	481,000,000	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	14,750,000,000	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	14,750,000,000	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	5,600,000,000	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	5,602,000,000	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	5,602,000,000	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	5,600,000,000	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	9,148,000,000	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	9,148,000,000	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		9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) Reportable_Business_Segments	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Operating Statistics [Line Items]
Reportable segments | Reportable_Business_Segments			3
Goodwill weighting assigned			100%
Cash, cash equivalents, and investment securities	$ 18,974		$ 18,974			$ 14,288
Loans HFS	2,327		2,327			1,402
Loans HFI, net of deferred fees and costs	53,346		53,346			50,297
Less: allowance for credit losses	(356.6)	$ (327.4)	(356.6)	$ (327.4)	$ (351.8)	(336.7)	$ (321.1)	$ (309.7)
Net loans HFI	52,989		52,989			49,960
Goodwill and intangible assets, net	661		661			669
Other assets	5,129		5,129			4,543
Total assets	80,080		80,080			70,862
Total deposits	68,040		68,040			55,333
Borrowings and qualifying debt	3,893		3,893			8,125
Other liabilities	1,470		1,470			1,326
Total liabilities	73,403		73,403			64,784
Allocated equity:	6,677.1	5,746	6,677.1	5,746	$ 6,334.2	6,078.4	$ 5,684.9	$ 5,356
Total liabilities and stockholders' equity	80,080		80,080			70,862
Excess funds provided (used)	0		0			0
Net interest income (expense)	696.9	587	1,952.4	1,747.2
Provision for credit losses	33.6	12.1	85.9	53.3
Net interest income after provision for credit losses	663.3	574.9	1,866.5	1,693.9
Non-interest income	126.2	129.2	371.3	190.2
Non-interest expense	537.4	426.2	1,506	1,161.5
Income before provision for income taxes	252.1	277.9	731.8	722.6
Income tax expense	52.3	61.3	161	148.1
Net income	199.8	216.6	$ 570.8	574.5
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 investment securities	15		$ 15			13
Loans HFS	0		0			0
Loans HFI, net of deferred fees and costs	31,518		31,518			29,136
Less: allowance for credit losses	(298)		(298)			(284)
Net loans HFI	31,220		31,220			28,852
Goodwill and intangible assets, net	291		291			292
Other assets	398		398			398
Total assets	31,924		31,924			29,555
Total deposits	24,335		24,335			23,897
Borrowings and qualifying debt	5		5			7
Other liabilities	87		87			109
Total liabilities	24,427		24,427			24,013
Allocated equity:	2,734		2,734			2,555
Total liabilities and stockholders' equity	27,161		27,161			26,568
Excess funds provided (used)	(4,763)		(4,763)			(2,987)
Net interest income (expense)	286.2	331.5	867.3	1,077.5
Provision for credit losses	27.7	14.1	79.1	29.7
Net interest income after provision for credit losses	258.5	317.4	788.2	1,047.8
Non-interest income	31.3	25.9	80.5	(40.1)
Non-interest expense	150.5	147.2	457.3	430.9
Income before provision for income taxes	139.3	196.1	411.4	576.8
Income tax expense	28.8	64.9	90.5	125.1
Net income	110.5	131.2	320.9	451.7
Operating Segments | Consumer Related Segment
Operating Statistics [Line Items]
Cash, cash equivalents, and investment securities	0		0			125
Loans HFS	2,327		2,327			1,402
Loans HFI, net of deferred fees and costs	21,828		21,828			21,161
Less: allowance for credit losses	(59)		(59)			(53)
Net loans HFI	21,769		21,769			21,108
Goodwill and intangible assets, net	370		370			377
Other assets	1,814		1,814			1,826
Total assets	26,280		26,280			24,838
Total deposits	37,183		37,183			24,925
Borrowings and qualifying debt	62		62			402
Other liabilities	525		525			338
Total liabilities	37,770		37,770			25,665
Allocated equity:	1,844		1,844			1,790
Total liabilities and stockholders' equity	39,614		39,614			27,455
Excess funds provided (used)	13,334		13,334			2,617
Net interest income (expense)	433.6	243.8	1,065.2	647.8
Provision for credit losses	5.4	(3)	6	0.4
Net interest income after provision for credit losses	428.2	246.8	1,059.2	647.4
Non-interest income	64	89.4	249.6	226.6
Non-interest expense	378.7	267.3	1,005.7	691.6
Income before provision for income taxes	113.5	68.9	303.1	182.4
Income tax expense	19	28.8	62.3	39.4
Net income	94.5	40.1	240.8	143
Corporate & Other | Corporate And Other Segment
Operating Statistics [Line Items]
Cash, cash equivalents, and investment securities	18,959		18,959			14,150
Loans HFS	0		0			0
Loans HFI, net of deferred fees and costs	0		0			0
Less: allowance for credit losses	0		0			0
Net loans HFI	0		0			0
Goodwill and intangible assets, net	0		0			0
Other assets	2,917		2,917			2,319
Total assets	21,876		21,876			16,469
Total deposits	6,522		6,522			6,511
Borrowings and qualifying debt	3,826		3,826			7,716
Other liabilities	858		858			879
Total liabilities	11,206		11,206			15,106
Allocated equity:	2,099		2,099			1,733
Total liabilities and stockholders' equity	13,305		13,305			16,839
Excess funds provided (used)	(8,571)		(8,571)			$ 370
Net interest income (expense)	(22.9)	11.7	19.9	21.9
Provision for credit losses	0.5	1	0.8	23.2
Net interest income after provision for credit losses	(23.4)	10.7	19.1	(1.3)
Non-interest income	30.9	13.9	41.2	3.7
Non-interest expense	8.2	11.7	43	39
Income before provision for income taxes	(0.7)	12.9	17.3	(36.6)
Income tax expense	4.5	(32.4)	8.2	(16.4)
Net income	$ (5.2)	$ 45.3	$ 9.1	$ (20.2)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue	$ 15.2	$ 29.6	$ 45.9	$ 67.9