Western Alliance Bancorporation (WAL) 10-Q 1 Aug 23 2023 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Jul. 28, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
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 Central Index Key	0001212545
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		109,503,457
Common Stock [Member]
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	Jun. 30, 2023		Dec. 31, 2022
Assets:
Cash and due from banks	$ 288		$ 259
Interest-bearing deposits in other financial institutions	1,865		784
Cash and cash equivalents	2,153		1,043
Debt Securities, Available-for-sale, Amortized Cost	9,454		7,973
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	4.4		0
Debt Securities, Available-for-sale	8,631	[1]	7,092	[2]
Debt Securities, Held-to-maturity, Allowance for Credit Loss	(6)		(5.2)
Debt Securities, Held-to-maturity, Fair Value	1,186		1,112
Debt Securities, Held-to-maturity, Net of Allowance	1,361		1,284
Investment securities - equity	139	[1]	160	[2]
Investments in restricted stock, at cost	243		224
Loans Receivable Held-for-sale, Amount	3,156		1,184
Loans:
Loans and Leases Receivable, Net of Deferred Income	47,875		51,862
Less: Allowance for credit losses	(321.1)		(309.7)
Net loans held for investment	47,554		51,552
Servicing Asset	1,007		1,148
Premises and equipment, net	315		276
Operating Lease, Right-of-Use Asset	151		163
Bank owned life insurance	184		182
Goodwill and intangible assets, net	674		680
Deferred Income Tax Assets, Net	315		311
Investments in LIHTC and renewable energy	596		624
Other assets	1,681		1,811
Total assets	68,160		67,734
Deposits:
Non-interest-bearing demand	16,733		19,691
Interest-bearing	34,308		33,953
Total deposits	51,041		53,644
Other borrowings	9,567		6,299
Qualifying debt	888		893
Operating Lease, Liability	179		185
Other liabilities	800		1,357
Total liabilities	62,475		62,378
Commitments and Contingencies
Preferred Stock, Par or Stated Value Per Share	$ 0.0001		$ 0.0001
Preferred Stock, Liquidation Preference Per Share	$ 25		$ 25
Preferred Stock, Shares Authorized	20,000,000		20,000,000
Preferred Stock, Shares Outstanding	12,000,000		12,000,000
Common stock, par value	$ 0.0001		$ 0.0001
Common stock, shares authorized	200,000,000		200,000,000
Common Stock, Shares, Issued	112,211,949		111,465,292
Treasury Stock, Common, Shares	2,701,985		2,550,766
Stockholders’ equity:
Preferred Stock, Value, Issued	$ 295		$ 295
Common Stock, Value, Issued	2,180		2,163
Treasury Stock, Value	(116)		(105)
Accumulated other comprehensive loss	(610.5)		(661)
Retained earnings	3,937		3,664
Total stockholders’ equity	5,684.9		5,356
Total liabilities and stockholders’ equity	$ 68,160		$ 67,734
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale, Amortized Cost	$ 9,454	$ 7,973
Debt Securities, Held-to-maturity, Fair Value	$ 1,186	$ 1,112
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	112,211,949	111,465,292
Treasury Stock, Value	$ 116	$ 105

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Interest income:
Loans, including fees	$ 857,200	$ 516,600	$ 1,689,900	$ 951,300
Investment securities	110,300	57,600	204,600	104,300
Dividends and other	33,300	5,400	75,200	8,500
Total interest income	1,000,800	579,600	1,969,700	1,064,100
Interest expense:
Deposits	251,100	27,100	482,700	41,200
Qualifying debt	9,500	8,600	18,800	17,000
Other borrowings	189,900	18,900	308,000	31,400
Total interest expense	450,500	54,600	809,500	89,600
Net interest income	550,300	525,000	1,160,200	974,500
Provision for credit losses	21,800	27,500	41,200	36,500
Net interest income after provision for credit losses	528,500	497,500	1,119,000	938,000
Non-interest income:
Net gain on loan origination and sale activities	62,300	27,200	93,700	64,100
Loan servicing fees, net	24,100	45,400	66,000	86,500
Service charges and fees	20,800	7,600	30,300	14,600
Commercial banking related income	6,000	5,800	12,200	10,900
Gain on recovery from credit guarantees	1,200	9,000	4,500	11,300
Income from equity instruments	700	5,200	2,100	9,300
Gain on sales of investment securities	(13,600)	200	26,100	(6,700)
Assets, Fair Value Adjustment	12,700	(10,000)	(135,100)	(16,600)
Other income	4,800	5,000	13,400	14,500
Total non-interest income	119,000	(95,000)	(61,000)	(201,300)
Non-interest expense:
Salaries and employee benefits	145,600	139,000	294,500	277,300
Deposit costs	91,000	18,100	177,900	27,400
Insurance	33,000	6,900	48,700	14,100
Data processing	28,600	19,700	55,000	37,300
Legal, professional, and directors' fees	26,400	25,100	49,500	49,100
Expense Related to Distribution or Servicing and Underwriting Fees	18,400	14,700	32,200	25,500
Occupancy	15,400	13,000	31,900	25,800
Loan Processing Fee	5,600	6,400	10,000	12,900
Business development and marketing	5,000	5,400	10,200	9,800
Gain (Loss) on Extinguishment of Debt	(700)	0	(13,400)	0
Other expense	19,100	20,600	38,800	38,300
Total non-interest expense	387,400	268,900	735,300	517,500
Income before provision for income taxes	260,100	323,600	444,700	621,800
Income Tax Expense (Benefit)	44,400	63,400	86,800	121,500
Net income	215,700	260,200	357,900	500,300
Preferred Stock Dividends, Income Statement Impact	3,200	3,200	6,400	6,400
Net income available to common shareholders	$ 212,500	$ 257,000	$ 351,500	$ 493,900
Earnings per share:
Basic	$ 1.96	$ 2.40	$ 3.25	$ 4.63
Diluted	$ 1.96	$ 2.39	$ 3.24	$ 4.61
Weighted average number of common shares outstanding:
Basic	108.3	107.3	108.2	106.7
Diluted	108.3	107.7	108.3	107.1
Dividends declared per common share	$ 0.36	$ 0.35	$ 0.72	$ 0.70

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 215.7	$ 260.2	$ 357.9	$ 500.3
Other comprehensive income (loss), net:
Unrealized (loss) gain on AFS securities, net of tax effect of $11.2, $93.3, $(9.5), and $174.1 respectively	11.2	93.3	(9.5)	174.1
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax	(34.2)	(284.5)	25.9	(532.4)
Unrealized gain (loss) on junior subordinated debt, net of tax effect of $(1.7), $(0.7), $(1.3), and $(1.4) respectively	1.7	(0.7)	1.3	1.4
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax	(5)	2	3.9	4.2
Realized loss (gain) on sale of AFS securities included in income, net of tax effect of $(3.4), $0.1, $(6.6), and $1.9 respectively	3.4	0.1	6.6	(1.9)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	10.2	(0.3)	19.5	(5.4)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Tax	0	0	(0.4)	0
Net other comprehensive (loss) income	(19)	(282.8)	50.5	(533.6)
Comprehensive income (loss)	196.7	(22.6)	408.4	(33.3)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax	0	0	1.2	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	4.4		4.4
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0		(17.1)
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0		0
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	6	3.2	6	3.2
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal)	(0.5)	0	0.8	2
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	$ 0	0	$ 0
Accrued Investment Income Receivable	$ 4		$ 4

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions		Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Treasury Stock, Common
Beginning balance, shares at Dec. 31, 2021			12,000,000	106,600,000
Beginning balance at Dec. 31, 2021		$ 4,962.6	$ 294.5	$ 0	$ 1,966.2	$ 15.7	$ 2,773	$ 86.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		500.3					500.3
Restricted stock grants, net, shares				(600,000)
Restricted stock grants, net		20.9			20.9
Treasury Stock, Shares, Acquired	[1]			200,000
Treasury Stock, Value, Acquired, Cost Method	[1]	$ 17.5						17.5
Stock Issued During Period, Shares, New Issues		1,300,000		1,300,000
Stock Issued During Period, Value, New Issues		$ 107.7			107.7
Dividends, Preferred Stock, Cash		(6.4)					(6.4)
Dividends, Common Stock, Cash		(75.2)					(75.2)
Other comprehensive (loss) income, net		(533.6)				(533.6)
Ending balance, shares at Jun. 30, 2022			12,000,000	108,300,000
Ending Balance at Jun. 30, 2022		4,958.8	$ 294.5	$ 0	2,094.8	(517.9)	3,191.7	104.3
Beginning balance, shares at Mar. 31, 2022			12,000,000	108,300,000
Beginning balance at Mar. 31, 2022		5,011.6	$ 294.5	$ 0	2,083.7	(235.1)	2,972.6	104.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		260.2					260.2
Restricted stock grants, net, shares				0
Restricted stock grants, net		11.1			11.1
Treasury Stock, Shares, Acquired	[1]			0
Treasury Stock, Value, Acquired, Cost Method	[1]	0.2						0.2
Dividends, Preferred Stock, Cash		(3.2)					(3.2)
Dividends, Common Stock, Cash		(37.9)					(37.9)
Other comprehensive (loss) income, net		(282.8)				(282.8)
Ending balance, shares at Jun. 30, 2022			12,000,000	108,300,000
Ending Balance at Jun. 30, 2022		4,958.8	$ 294.5	$ 0	2,094.8	(517.9)	3,191.7	104.3
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	(661)	3,664.1	105.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		357.9					357.9
Restricted stock grants, net, shares				(700,000)
Restricted stock grants, net		16.6			16.6
Treasury Stock, Shares, Acquired	[1]			100,000
Treasury Stock, Value, Acquired, Cost Method	[1]	10.9						10.9
Dividends, Preferred Stock, Cash		(6.4)					(6.4)
Dividends, Common Stock, Cash		(78.8)					(78.8)
Other comprehensive (loss) income, net		50.5				50.5
Ending balance, shares at Jun. 30, 2023			12,000,000	109,500,000
Ending Balance at Jun. 30, 2023		5,684.9	$ 294.5	$ 0	2,180.3	(610.5)	3,936.8	116.2
Beginning balance, shares at Mar. 31, 2023			12,000,000	109,500,000
Beginning balance at Mar. 31, 2023		5,520.5	$ 294.5	$ 0	2,169.8	(591.5)	3,763.7	116
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		215.7					215.7
Restricted stock grants, net, shares				0
Restricted stock grants, net		10.5			10.5
Treasury Stock, Shares, Acquired	[1]			0
Treasury Stock, Value, Acquired, Cost Method	[1]	0.2						0.2
Dividends, Preferred Stock, Cash		(3.2)					(3.2)
Dividends, Common Stock, Cash		(39.4)					(39.4)
Other comprehensive (loss) income, net		(19)				(19)
Ending balance, shares at Jun. 30, 2023			12,000,000	109,500,000
Ending Balance at Jun. 30, 2023		$ 5,684.9	$ 294.5	$ 0	$ 2,180.3	$ (610.5)	$ 3,936.8	$ 116.2
[1] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net income	$ 357,900	$ 500,300
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	41,200	36,500
Depreciation and amortization	34,000	22,800
Stock-based compensation	16,500	20,900
Deferred income taxes	(21,600)	(10,900)
Amortization of net (discounts) premiums for investment securities	(15,400)	12,300
Amortization of tax credit investments	39,000	28,800
Amortization of operating lease right of use asset	11,800	10,800
Amortization of net deferred loan fees and net purchase premiums	(46,900)	(30,500)
Payments for Origination and Purchases of Loans Held-for-sale	19,947,200	25,371,000
Proceeds from Sale and Collection of Loans Held-for-sale	19,751,600	26,301,500
Servicing Asset at Fair Value, Additions	387,200	397,500
Net losses (gains) on:
Servicing Asset at Fair Value, Period Increase (Decrease)	(24,200)	109,800
Assets, Fair Value Adjustment, Non-Cash	137,900	16,600
Gain (Loss) on Sale of Investments	(26,100)	(6,700)
Gain (Loss) on Extinguishment of Debt	(13,400)	0
Other Operating Activities, Cash Flow Statement	2,900	5,000
Other assets and liabilities, net	(105,700)	(59,100)
Net cash (used in) provided by operating activities	(100,100)	(960,000)
Investment securities - AFS
Payments to Acquire Debt Securities, Available-for-sale	5,111,100	2,235,400
Principal pay downs and maturities	2,917,300	410,500
Proceeds from sales	770,400	119,600
Debt Securities, Held-to-maturity [Abstract]
Purchases	105,900	129,500
Principal pay downs and maturities	27,700	18,900
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Purchases	(2,100)	(34,900)
Redemptions	300	300
Proceeds from Sale of Equity securities, FV-NI	0	14,100
Proceeds from Sale of Mortgage Servicing Rights (MSR)	464,300	363,800
Purchase of Other Investments	(102,600)	(168,600)
Net decrease (increase) in loans HFI	1,569,100	(7,954,500)
Purchase of premises, equipment, and other assets, net	(60,800)	(47,400)
Payments to Acquire Businesses, Net of Cash Acquired	0	50,000
Net cash provided by (used in) investing activities	366,600	9,693,100
Cash flows from financing activities:
Net (decrease) increase in deposits	(2,603,000)	6,100,100
Net proceeds from issuance of long-term debt	9,900	486,600
Repayments of Subordinated Debt	(531,500)	(17,400)
Net increase in short-term borrowings	1,603,800	3,524,600
Proceeds from Short-Term Debt, Maturing in More than Three Months	2,661,800	0
Repayments of Short-Term Debt, Maturing in More than Three Months	(201,600)	0
Cash paid for tax withholding on vested restricted stock and other	10,900	17,500
Cash dividends paid on common stock and preferred stock	85,200	81,600
Proceeds from Issuance of Common Stock	0	107,700
Net cash provided by financing activities	843,300	10,102,500
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	1,109,800	1,369,400
Cash, cash equivalents, and restricted cash at beginning of period	1,043,400	516,400
Cash, cash equivalents, and restricted cash at end of period	2,153,200	1,885,800
Cash paid during the period for:
Interest Paid, Excluding Capitalized Interest, Operating Activities	740,900	87,900
Income Taxes Paid, Net	44,500	185,000
Transfers of mortgage-backed securities in settlement of secured borrowings	275,600	281,500
Net increase (decrease) in unfunded commitments and obligations	12,600	207,200
Transfers of securitized LHFS to AFS securities	86,700	89,600
Transfer of Portfolio Loans and Leases to Held-for-sale	6,275,200	0
Transfer of EBO loans previously classified as HFS to HFI	$ 1,007,700	$ 1,505,700

Deposits (Tables)

Deposits (Tables) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Statement of Financial Position [Abstract]
Non-interest-bearing demand	$ 16,733		$ 16,733		$ 19,691
Interest-Bearing Domestic Deposit, Demand	12,646		12,646		9,507
Deposits, Savings Deposits	13,085		13,085		19,397
Time Deposits, $250,000 or more	6,677		6,677		3,815
Time Deposits, Less than $250,000	1,900		1,900		1,234
Deposits	51,041		51,041		53,644
Reciprocal Deposits	11,400		11,400		2,800
Deposits, earnings credit	14,900		14,900		12,900
Deposits costs, deposits with earnings credits	87.8	$ 17.3	173.4	$ 26
Deposits, Wholesale	18,300		18,300		$ 4,800
Time Deposit Maturities, Year One	4,972		4,972
Time Deposit Maturities, Year Two	3,202		3,202
Time Deposit Maturities, Year Three	400		400
Time Deposit Maturities, Year Four	2		2
Time Deposit Maturities, Year Five	1		1
Time Deposits	$ 8,577		$ 8,577

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Nature of operations WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of customized loan, deposit, and treasury management capabilities, including 24/7 funds transfer and other digital payment offerings through its wholly-owned banking subsidiary, WAB. WAB operates the following full-service banking divisions: ABA, BON, FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services, including mortgage banking services through AmeriHome, and digital payment services for the class action legal industry through DST. 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 June 30, 2023 and for the three and six months ended June 30, 2023 and 2022 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, 2022. 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 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 amendments in this update are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years and are applied on a modified retrospective or a retrospective basis. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements. Recently adopted accounting guidance Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued guidance within ASU 2022-02, Financial Instruments—Credit Losses (Topic 326). The amendments in this update eliminate the accounting guidance and related disclosures for TDRs by creditors in Subtopic 310-40, Receivables—Troubled Debt Restructurings by Creditors , while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty and requiring an entity to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost . The Company adopted this accounting guidance prospectively on January 1, 2023. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements. Use of estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates and judgments are ongoing and are based on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities, as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Consolidated Financial Statements and related notes. Material estimates that are susceptible to significant changes in the near term relate to: 1) the determination of the ACL; 2) certain assets and liabilities carried at fair value; and 3) accounting for income taxes. Principles of consolidation As of June 30, 2023, 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 Certain amounts in the Consolidated Income Statements for the prior periods have been reclassified to conform to the current presentation. The reclassifications had no effect on net income or stockholders’ equity as previously reported. Goodwill and other intangible assets The Company evaluated whether the continued effects from the March 2023 bank failures may give rise to a triggering event and elected to perform a Step 0 goodwill impairment assessment, which included analyzing qualitative factors applicable to the Company, the financial performance of the Company, and valuation metrics of publicly traded companies comparable to the Company and its reporting units. As of June 30, 2023, the Company does not believe that these events or circumstances have significantly altered the long-term financial performance of the Company. Accordingly, it was determined that it is more likely than not that the fair value of the Company and its reporting units exceeds their respective carrying values as of June 30, 2023. The Company's goodwill totaled $527 million at June 30, 2023 and December 31, 2022, with $290 million and $237 million allocated to the Commercial and Consumer Related segments, respectively.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Investment Securities	d fair values of investment securities are summarized as follows: June 30, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Private label residential MBS $ 192 $ — $ (40) $ 152 Tax-exempt 1,175 1 (142) 1,034 Total HTM securities $ 1,367 $ 1 $ (182) $ 1,186 Available-for-sale debt securities CLO $ 2,183 $ — $ (39) $ 2,144 Commercial MBS issued by GSEs 69 — (9) 60 Corporate debt securities 411 — (73) 338 Private label residential MBS 1,371 — (230) 1,141 Residential MBS issued by GSEs 2,141 — (376) 1,765 Tax-exempt 919 — (89) 830 U.S. Treasury securities 2,286 — — 2,286 Other 74 3 (10) 67 Total AFS debt securities $ 9,454 $ 3 $ (826) $ 8,631 December 31, 2022 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Private label residential MBS $ 198 $ — $ (39) $ 159 Tax-exempt 1,091 — (138) 953 Total HTM securities $ 1,289 $ — $ (177) $ 1,112 Available-for-sale debt securities CLO $ 2,796 $ — $ (90) $ 2,706 Commercial MBS issued by GSEs 104 1 (8) 97 Corporate debt securities 429 — (39) 390 Private label residential MBS 1,442 — (243) 1,199 Residential MBS issued by GSEs 2,123 — (383) 1,740 Tax-exempt 1,004 2 (115) 891 Other 75 6 (12) 69 Total AFS debt securities $ 7,973 $ 9 $ (890) $ 7,092 In addition, the Company held equity securities, which primarily consisted of preferred stock and CRA investments, with a fair value of $139 million and $160 million at June 30, 2023 and December 31, 2022, respectively. Unrealized gains on equity securities of $0.1 million and losses of $10.0 million for the three months ended June 30, 2023 and 2022, respectively, and losses of $8.4 million and $16.7 million for the six months ended June 30, 2023 and 2022, respectively, were recognized in earnings as a component of fair value loss adjustments. Securities with carrying amounts of approximately $ 7.3 billion 1.7 billion 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: June 30, 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 CLO $ 2 $ 261 $ 37 $ 1,875 $ 39 $ 2,136 Commercial MBS issued by GSEs 1 12 8 45 9 57 Corporate debt securities (1) 2 15 71 320 73 335 Private label residential MBS 1 28 229 1,084 230 1,112 Residential MBS issued by GSEs 8 239 368 1,508 376 1,747 Tax-exempt 6 130 83 695 89 825 Other 2 18 8 36 10 54 Total AFS securities $ 22 $ 703 $ 804 $ 5,563 $ 826 $ 6,266 (1) Includes securities with an ACL that have a fair value of $109 million and unrealized losses of $40 million. December 31, 2022 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 CLO $ 81 $ 2,467 $ 9 $ 216 $ 90 $ 2,683 Commercial MBS issued by GSEs 4 46 4 14 8 60 Corporate debt securities 28 263 11 120 39 383 Private label residential MBS 27 279 216 912 243 1,191 Residential MBS issued by GSEs 82 600 301 1,101 383 1,701 Tax-exempt 93 752 22 78 115 830 Other 4 26 8 26 12 52 Total AFS securities $ 319 $ 4,433 $ 571 $ 2,467 $ 890 $ 6,900 The total number of AFS debt securities in an unrealized loss position at June 30, 2023 was 797, compared to 832 at December 31, 2022. On a quarterly basis, the Company performs an impairment analysis on its AFS debt securities that are 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 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 that are 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 March 2023 bank failures, the Company performed a targeted impairment analysis on its AFS debt securities issued by regional banks held in its corporate debt securities portfolio. The Company considered the issuers' credit ratings, probability of default, and other factors. As a result of the analysis, a $2.2 million and $21.5 million provision for credit losses was recognized during the three and six months ended June 30, 2023, respectively. The provision for credit losses for the six months ended June 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 that the Company will not be required to sell the remainder of these regional bank debt securities prior to their anticipated recovery, therefore, no credit losses on the Company's remaining AFS securities portfolio have been recognized during the three and six months ended June 30, 2023. For the Company's private label residential MBS, which consist of non-agency collateralized mortgage obligations that are 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 June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ 2.2 $ 2.2 $ — $ — $ 4.4 Six Months Ended June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Available for sale securities Corporate debt securities $ — $ 21.5 $ (17.1) $ — $ 4.4 There were no credit losses recognized on AFS securities during the three and six months ended June 30, 2022. 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 June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 6.5 $ (0.5) $ — $ — $ 6.0 Six Months Ended June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 0.8 $ — $ — $ 6.0 Three Months Ended June 30, 2022: Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 3.2 $ — $ — $ — $ 3.2 Six Months Ended June 30, 2022: Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ (2.0) $ — $ — $ 3.2 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 $4 million at June 30, 2023 and December 31, 2022, 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: June 30, 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 Private label residential MBS $ — $ — $ — $ — $ — $ — $ 192 $ 192 Tax-exempt — — — — — — 1,175 1,175 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,367 $ 1,367 Available-for-sale debt securities CLO $ 120 $ — $ 1,960 $ 64 $ — $ — $ — $ 2,144 Commercial MBS issued by GSEs — 60 — — — — — 60 Corporate debt securities — — — 70 219 49 — 338 Private label residential MBS 1,115 — 25 — — 1 — 1,141 Residential MBS issued by GSEs — 1,765 — — — — — 1,765 Tax-exempt 9 16 354 376 — — 75 830 U.S. Treasury securities — 2,286 — — — — — 2,286 Other — — 9 9 29 3 17 67 Total AFS securities (1) $ 1,244 $ 4,127 $ 2,348 $ 519 $ 248 $ 53 $ 92 $ 8,631 Equity securities Common stock $ — $ — $ — $ — $ — $ — $ 2 $ 2 CRA investments — 25 — — — — 12 37 Preferred stock — — — — 53 37 10 100 Total equity securities (1) $ — $ 25 $ — $ — $ 53 $ 37 $ 24 $ 139 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies. December 31, 2022 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Private label residential MBS $ — $ — $ — $ — $ — $ — $ 198 $ 198 Tax-exempt — — — — — — 1,091 1,091 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,289 $ 1,289 Available-for-sale debt securities CLO $ 310 $ — $ 2,121 $ 275 $ — $ — $ — $ 2,706 Commercial MBS issued by GSEs — 97 — — — — — 97 Corporate debt securities — — — 74 316 — — 390 Private label residential MBS 1,158 — 41 — — — — 1,199 Residential MBS issued by GSEs — 1,740 — — — — — 1,740 Tax-exempt 11 15 392 425 — — 48 891 Other — — 9 9 27 6 18 69 Total AFS securities (1) $ 1,479 $ 1,852 $ 2,563 $ 783 $ 343 $ 6 $ 66 $ 7,092 Equity securities Common stock $ — $ — $ — $ — $ — $ — $ 3 $ 3 CRA investments — 24 — — — — 25 49 Preferred stock — — — — 82 17 9 108 Total equity securities (1) $ — $ 24 $ — $ — $ 82 $ 17 $ 37 $ 160 (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 June 30, 2023, 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 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. June 30, 2023 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 22 $ 22 After one year through five years 6 6 After five years through ten years 33 31 After ten years 1,114 975 Mortgage-backed securities 192 152 Total HTM securities $ 1,367 $ 1,186 Available-for-sale Due in one year or less $ 2,286 $ 2,285 After one year through five years 166 149 After five years through ten years 898 832 After ten years 2,523 2,399 Mortgage-backed securities 3,581 2,966 Total AFS securities $ 9,454 $ 8,631 The following table presents gross gains and losses on sales of investment securities: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Available-for-sale securities Gross gains $ 0.1 $ 0.4 $ 3.5 $ 7.3 Gross losses (13.7) — (29.6) — Net (losses) gains on AFS securities $ (13.6) $ 0.4 $ (26.1) $ 7.3 Equity securities Gross gains $ — $ — $ — $ — Gross losses — (0.6) — (0.6) Net losses on equity securities $ — $ (0.6) $ — $ (0.6) During the three months ended June 30, 2023, the Company sold securities with a carrying value of $355 million and recognized a net loss of $13.6 million. During the six months ended June 30, 2023, the Company sold securities with a carrying value of $814 million and recognized a net loss of $26.1 million. Sales of CLOs were executed as part of the Company's balance sheet repositioning strategy and resulted in the gross losses above. Sales of MBS and tax-exempt municipal securities were completed to secure gains. During the three and six months ended June 30, 2022, the Company sold securities with a carrying value of $22 million and $107 million, respectively, and incurred a net loss of $0.2 million and a net gain of $6.7 million.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
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 June 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, March 31, 2023 $ (594.3) $ (0.3) $ 1.9 $ 1.2 $ (591.5) Other comprehensive (loss) income before reclassifications (34.2) — 5.0 — (29.2) Amounts reclassified from AOCI 10.2 — — — 10.2 Net current-period other comprehensive (loss) income (24.0) — 5.0 — (19.0) Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Balance, March 31, 2022 $ (236.3) $ (0.3) $ 1.5 $ — $ (235.1) Other comprehensive (loss) income before reclassifications (284.5) — 2.0 — (282.5) Amounts reclassified from AOCI (0.3) — — — (0.3) Net current-period other comprehensive (loss) income (284.8) — 2.0 — (282.8) Balance, June 30, 2022 $ (521.1) $ (0.3) $ 3.5 $ — $ (517.9) Six Months Ended June 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, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive income before reclassifications 25.9 — 3.9 1.2 31.0 Amounts reclassified from AOCI 19.5 — — — 19.5 Net current-period other comprehensive income 45.4 — 3.9 1.2 50.5 Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Balance, December 31, 2021 $ 16.7 $ (0.3) $ (0.7) $ — $ 15.7 Other comprehensive (loss) income before reclassifications (532.4) — 4.2 — (528.2) Amounts reclassified from AOCI (5.4) — — — (5.4) Net current-period other comprehensive (loss) income (537.8) — 4.2 — (533.6) Balance, June 30, 2022 $ (521.1) $ (0.3) $ 3.5 $ — $ (517.9)

Derivatives and Hedging

Derivatives and Hedging	3 Months Ended
	Jun. 30, 2023
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 that 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 Sheets, 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 and volatility of net interest income and EVE to interest rate fluctuations. 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 are based on LIBOR and 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 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. Under these interest rate swap contracts, the Company receives a variable rate based on SOFR and pays a fixed rate on the outstanding notional amount. The Company also had pay fixed/receive variable interest rate swaps, designated as fair value hedges using the last-of-layer method. Upon termination of these last-of-layer hedges in 2022, the cumulative basis adjustment on these hedges was allocated across the remaining loan pool and is being amortized over the remaining term. At June 30, 2023, the remaining cumulative basis adjustment on the terminated last-of-layer hedges totaled $15 million. Derivatives Not Designated in Hedge Relationships Management enters into certain foreign exchange derivative contracts, back-to-back interest rate contracts, and risk participation agreements 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. Contracts with customers, along with the related derivative trades that 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's back-to-back interest rate contracts are used to allow customers to manage long-term interest rate risk. 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 the participated loan. The Company also uses derivative financial instruments to manage exposure to interest rate risk within its mortgage banking business related to IRLCs and its inventory of loans HFS and MSRs. The Company economically hedges the changes in fair value associated with changes in interest rates generally by utilizing forward sale commitments, interest rate futures and interest rate swaps. Fair Value Hedges As of June 30, 2023 and December 31, 2022, the following amounts are reflected on the Consolidated Balance Sheets related to cumulative basis adjustments for outstanding fair value hedges: June 30, 2023 December 31, 2022 Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 3,934 $ 52 $ 447 $ 17 (1) Included in the carrying value of the hedged assets/(liabilities). (2) As of June 30, 2023, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.8 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $29 million. For the Company's derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current period earnings. The loss or gain on the hedged item is recognized in the same line item as the offsetting loss or gain on the related interest rate swaps. For loans, the gain or loss on the hedged item is included in interest income, as shown in the table below. Three Months Ended June 30, 2023 2022 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 $ 39.0 $ (39.0) $ 15.2 $ (15.2) Six Months Ended June 30, 2023 2022 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 $ 34.7 $ (34.7) $ 48.7 $ (48.7) In addition to the gains and losses on the Company's outstanding fair value hedges presented in the above table, the Company recognized $2.9 million and $5.9 million in interest income related to the amortization of the cumulative basis adjustment on its discontinued last-of-layer hedges during the three and six months ended June 30, 2023, respectively. 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 June 30, 2023, December 31, 2022, and June 30, 2022. The change in the notional amounts of these derivatives from June 30, 2022 to June 30, 2023 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. June 30, 2023 December 31, 2022 June 30, 2022 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 $ 4,033 $ 56 $ 4 $ 476 $ 18 $ — $ 500 $ 5 $ 11 Total $ 4,033 $ 56 $ 4 $ 476 $ 18 $ — $ 500 $ 5 $ 11 Derivatives not designated as hedging instruments (1): Foreign currency contracts $ 71 $ 1 $ 1 $ 250 $ 1 $ 9 $ 138 $ 1 $ — Forward purchase contracts 4,484 1 16 2,709 1 13 4,764 32 10 Forward sales contracts 7,279 26 2 4,985 16 8 9,621 35 35 Futures purchase contracts (2), (3) 200 — — — — — 700 — — Futures sales contracts (2), (3) 12,210 — — 8,706 — — 6,072 — — Interest rate lock commitments 2,331 6 4 1,459 5 3 2,819 15 3 Interest rate contracts 2,424 14 14 1,538 6 6 64 — — Risk participation agreements 44 — — 48 — — — — — Total $ 29,043 $ 48 $ 37 $ 19,695 $ 29 $ 39 $ 24,178 $ 83 $ 48 Margin 85 12 4 1 (9) 24 Total, including margin $ 29,043 $ 133 $ 49 $ 19,695 $ 33 $ 40 $ 24,178 $ 74 $ 72 (1) Relate to economic hedging arrangements. (2) The Company enters into forward 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 duration of only 0.25 years and are intended to cover the longer duration of MSR hedges. (3) The notional amounts previously reported for December 31, 2022 and June 30, 2022 have been adjusted in the current period to account for the impact of offsetting contracts. To close a futures contract prior to settlement, the Company purchases an offsetting future with the same terms as the original contract and these contracts no longer require settlement. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities on the Consolidated Balance Sheets, as summarized in the table below: June 30, 2023 December 31, 2022 June 30, 2022 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 Forward purchase contracts $ 1 $ — $ 1 $ 1 $ — $ 1 $ 31 $ — $ 31 Forward sales contracts 26 — 26 13 — 13 33 — 33 Interest rate contracts 70 — 70 18 — 18 5 — 5 Margin 85 — 85 4 — 4 (9) — (9) Netting — (28) (28) — (17) (17) — (55) (55) $ 182 $ (28) $ 154 $ 36 $ (17) $ 19 $ 60 $ (55) $ 5 Liabilities Forward purchase contracts $ (16) $ — $ (16) $ (12) $ — $ (12) $ (10) $ — $ (10) Forward sales contracts (2) — (2) (8) — (8) (34) — (34) Interest rate contracts (4) — (4) — — — (11) — (11) Margin (12) — (12) (1) — (1) (24) — (24) Netting — 28 28 — 17 17 — 55 55 $ (34) $ 28 $ (6) $ (21) $ 17 $ (4) $ (79) $ 55 $ (24) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ 1 $ — $ 1 $ 1 $ — $ 1 $ 1 $ — $ 1 Forward purchase contracts — — — — — — 1 — 1 Forward sales contracts — — — 3 — 3 2 — 2 Interest rate lock commitments 6 — 6 5 — 5 15 — 15 Interest rate contracts — — — 6 — 6 — — — $ 7 $ — $ 7 $ 15 $ — $ 15 $ 19 $ — $ 19 Liabilities Foreign currency contracts $ (1) $ — $ (1) $ (9) $ — $ (9) $ — $ — $ — Forward purchase contracts — — — (1) — (1) — — — Forward sales contracts — — — — — — (1) — (1) Interest rate lock commitments (4) — (4) (3) — (3) (3) — (3) Interest rate contracts (14) — (14) (6) — (6) — — — $ (19) $ — $ (19) $ (19) $ — $ (19) $ (4) $ — $ (4) Total derivatives and margin Assets $ 189 $ (28) $ 161 $ 51 $ (17) $ 34 $ 79 $ (55) $ 24 Liabilities $ (53) $ 28 $ (25) $ (40) $ 17 $ (23) $ (83) $ 55 $ (28) The following table summarizes the net gain (loss) on derivatives included in income: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ (11.1) $ 23.2 $ 0.3 $ 2.4 Forward contracts 55.6 101.0 18.8 342.3 Interest rate swaps (4.6) — (3.3) — Other contracts 2.2 (6.1) 1.8 (9.8) Total gain $ 42.1 $ 118.1 $ 17.6 $ 334.9 Net loan servicing revenue: Forward contracts $ (13.2) $ (8.0) $ (14.7) $ (42.9) Futures contracts 18.7 (21.9) 14.7 (43.9) Interest rate swaps (36.5) — (17.6) — Total loss $ (31.0) $ (29.9) $ (17.6) $ (86.8) Counterparty Credit Risk

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
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 and summarizes the weighted average common shares excluded from the diluted EPS calculation due to their antidilutive effect: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions, except per share amounts) Weighted average shares - basic 108.3 107.3 108.2 106.7 Dilutive effect of stock awards — 0.4 0.1 0.4 Weighted average shares - diluted 108.3 107.7 108.3 107.1 Net income available to common stockholders $ 212.5 $ 257.0 $ 351.5 $ 493.9 Earnings per Common Share: Basic $ 1.96 $ 2.40 $ 3.25 $ 4.63 Diluted 1.96 2.39 3.24 4.61 Antidilutive restricted stock outstanding 0.4 — 0.2 —

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	The Company's effective tax rate was 17.1% and 19.6% for the three months ended June 30, 2023 and 2022, respectively. For each of the six months ended June 30, 2023 and 2022, the Company's effective tax rate was 19.5%. The decrease in the three-month effective tax rate was primarily due to increases in expected LIHTC benefits during 2023. As of June 30, 2023, the net DTA balance totaled $315 million. There was not a significant change in the net deferred tax asset of $311 million at December 31, 2022 as decreases to MSR DTLs were offset by increases in the fair market value of AFS securities and decreases to the accrued bonus DTA. Although realization is not assured, the Company believes that the realization of the recognized deferred tax asset of $315 million at June 30, 2023 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 June 30, 2023 and December 31, 2022, the Company 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. The limited liability entities are considered to be VIEs; however, as a limited partner, the Company is not the primary beneficiary and is not required to consolidate these entities.

Segments

Segments	6 Months Ended
	Jun. 30, 2023
Segment Reporting [Abstract]
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 year. 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 that 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.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2023
Accounting Policies [Abstract]
Nature of Operation	Nature of operations WAL is a bank holding company headquartered in Phoenix, Arizona, incorporated under the laws of the state of Delaware. WAL provides a full spectrum of customized loan, deposit, and treasury management capabilities, including 24/7 funds transfer and other digital payment offerings through its wholly-owned banking subsidiary, WAB. WAB operates the following full-service banking divisions: ABA, BON, FIB, Bridge, and TPB. The Company also serves business customers through a national platform of specialized financial services, including mortgage banking services through AmeriHome, and digital payment services for the class action legal industry through DST. 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 June 30, 2023 and for the three and six months ended June 30, 2023 and 2022 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, 2022. The accounts of the Company and its consolidated subsidiaries are included in the Consolidated Financial Statements.
Recent Accounting Pronouncements	Recent accounting pronouncements 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 amendments in this update are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years and are applied on a modified retrospective or a retrospective basis. The adoption of this guidance is not expected to have a material impact on the Company's Consolidated Financial Statements. Recently adopted accounting guidance Troubled Debt Restructurings and Vintage Disclosures In March 2022, the FASB issued guidance within ASU 2022-02, Financial Instruments—Credit Losses (Topic 326). The amendments in this update eliminate the accounting guidance and related disclosures for TDRs by creditors in Subtopic 310-40, Receivables—Troubled Debt Restructurings by Creditors , while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty and requiring an entity to disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments—Credit Losses—Measured at Amortized Cost . The Company adopted this accounting guidance prospectively on January 1, 2023. The adoption of this guidance did not have a material impact on the Company's Consolidated Financial Statements.
Use of Estimates	Use of estimatesThe preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Management's estimates and judgments are ongoing and are based on experience, current and expected future conditions, third-party evaluations and various other assumptions that management believes are reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities, as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from those estimates and assumptions used in the Consolidated Financial Statements and related notes. Material estimates that are susceptible to significant changes in the near term relate to: 1) the determination of the ACL; 2) certain assets and liabilities carried at fair value; and 3) accounting for income taxes.
Principles of Consolidation	Principles of consolidation As of June 30, 2023, 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	ReclassificationsCertain amounts in the Consolidated Income Statements for the prior periods have been reclassified to conform to the current presentation. The reclassifications had no effect on net income or stockholders’ equity as previously reported.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table Text Block]	Three Months Ended June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 6.5 $ (0.5) $ — $ — $ 6.0 Six Months Ended June 30, 2023 Balance, Provision for Credit Losses Charge-offs Recoveries Balance, (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ 0.8 $ — $ — $ 6.0 Three Months Ended June 30, 2022: Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 3.2 $ — $ — $ — $ 3.2 Six Months Ended June 30, 2022: Balance, Provision for Credit Losses Charge-offs Recoveries Balance (in millions) Held-to-maturity debt securities Tax-exempt $ 5.2 $ (2.0) $ — $ — $ 3.2
Carrying Amounts and Fair Values of Investment Securities	The carrying amounts and fair values of investment securities are summarized as follows: June 30, 2023 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Private label residential MBS $ 192 $ — $ (40) $ 152 Tax-exempt 1,175 1 (142) 1,034 Total HTM securities $ 1,367 $ 1 $ (182) $ 1,186 Available-for-sale debt securities CLO $ 2,183 $ — $ (39) $ 2,144 Commercial MBS issued by GSEs 69 — (9) 60 Corporate debt securities 411 — (73) 338 Private label residential MBS 1,371 — (230) 1,141 Residential MBS issued by GSEs 2,141 — (376) 1,765 Tax-exempt 919 — (89) 830 U.S. Treasury securities 2,286 — — 2,286 Other 74 3 (10) 67 Total AFS debt securities $ 9,454 $ 3 $ (826) $ 8,631 December 31, 2022 Amortized Cost Gross Unrealized Gains Gross Unrealized (Losses) Fair Value (in millions) Held-to-maturity Private label residential MBS $ 198 $ — $ (39) $ 159 Tax-exempt 1,091 — (138) 953 Total HTM securities $ 1,289 $ — $ (177) $ 1,112 Available-for-sale debt securities CLO $ 2,796 $ — $ (90) $ 2,706 Commercial MBS issued by GSEs 104 1 (8) 97 Corporate debt securities 429 — (39) 390 Private label residential MBS 1,442 — (243) 1,199 Residential MBS issued by GSEs 2,123 — (383) 1,740 Tax-exempt 1,004 2 (115) 891 Other 75 6 (12) 69 Total AFS debt securities $ 7,973 $ 9 $ (890) $ 7,092 In addition, the Company held equity securities, which primarily consisted of preferred stock and CRA investments, with a fair value of $139 million and $160 million at June 30, 2023 and December 31, 2022, respectively. Unrealized gains on equity securities of $0.1 million and losses of $10.0 million for the three months ended June 30, 2023 and 2022, respectively, and losses of $8.4 million and $16.7 million for the six months ended June 30, 2023 and 2022, respectively, were recognized in earnings as a component of fair value loss adjustments. Securities with carrying amounts of approximately $ 7.3 billion 1.7 billion
Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position	unrealized loss position, aggregated by major security type and length of time in a continuous unrealized loss position: June 30, 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 CLO $ 2 $ 261 $ 37 $ 1,875 $ 39 $ 2,136 Commercial MBS issued by GSEs 1 12 8 45 9 57 Corporate debt securities (1) 2 15 71 320 73 335 Private label residential MBS 1 28 229 1,084 230 1,112 Residential MBS issued by GSEs 8 239 368 1,508 376 1,747 Tax-exempt 6 130 83 695 89 825 Other 2 18 8 36 10 54 Total AFS securities $ 22 $ 703 $ 804 $ 5,563 $ 826 $ 6,266 (1) Includes securities with an ACL that have a fair value of $109 million and unrealized losses of $40 million. December 31, 2022 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 CLO $ 81 $ 2,467 $ 9 $ 216 $ 90 $ 2,683 Commercial MBS issued by GSEs 4 46 4 14 8 60 Corporate debt securities 28 263 11 120 39 383 Private label residential MBS 27 279 216 912 243 1,191 Residential MBS issued by GSEs 82 600 301 1,101 383 1,701 Tax-exempt 93 752 22 78 115 830 Other 4 26 8 26 12 52 Total AFS securities $ 319 $ 4,433 $ 571 $ 2,467 $ 890 $ 6,900
Amortized Cost and Fair Value of Investment Securities by Contractual Maturities	A security is considered to be past due once it is 30 days contractually past due under the terms of the agreement. As of June 30, 2023, 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 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. June 30, 2023 Amortized Cost Estimated Fair Value (in millions) Held-to-maturity Due in one year or less $ 22 $ 22 After one year through five years 6 6 After five years through ten years 33 31 After ten years 1,114 975 Mortgage-backed securities 192 152 Total HTM securities $ 1,367 $ 1,186 Available-for-sale Due in one year or less $ 2,286 $ 2,285 After one year through five years 166 149 After five years through ten years 898 832 After ten years 2,523 2,399 Mortgage-backed securities 3,581 2,966 Total AFS securities $ 9,454 $ 8,631
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: June 30, 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 Private label residential MBS $ — $ — $ — $ — $ — $ — $ 192 $ 192 Tax-exempt — — — — — — 1,175 1,175 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,367 $ 1,367 Available-for-sale debt securities CLO $ 120 $ — $ 1,960 $ 64 $ — $ — $ — $ 2,144 Commercial MBS issued by GSEs — 60 — — — — — 60 Corporate debt securities — — — 70 219 49 — 338 Private label residential MBS 1,115 — 25 — — 1 — 1,141 Residential MBS issued by GSEs — 1,765 — — — — — 1,765 Tax-exempt 9 16 354 376 — — 75 830 U.S. Treasury securities — 2,286 — — — — — 2,286 Other — — 9 9 29 3 17 67 Total AFS securities (1) $ 1,244 $ 4,127 $ 2,348 $ 519 $ 248 $ 53 $ 92 $ 8,631 Equity securities Common stock $ — $ — $ — $ — $ — $ — $ 2 $ 2 CRA investments — 25 — — — — 12 37 Preferred stock — — — — 53 37 10 100 Total equity securities (1) $ — $ 25 $ — $ — $ 53 $ 37 $ 24 $ 139 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies. December 31, 2022 AAA Split-rated AAA/AA+ AA+ to AA- A+ to A- BBB+ to BBB- BB+ and below Unrated Totals (in millions) Held-to-maturity Private label residential MBS $ — $ — $ — $ — $ — $ — $ 198 $ 198 Tax-exempt — — — — — — 1,091 1,091 Total HTM securities (1) $ — $ — $ — $ — $ — $ — $ 1,289 $ 1,289 Available-for-sale debt securities CLO $ 310 $ — $ 2,121 $ 275 $ — $ — $ — $ 2,706 Commercial MBS issued by GSEs — 97 — — — — — 97 Corporate debt securities — — — 74 316 — — 390 Private label residential MBS 1,158 — 41 — — — — 1,199 Residential MBS issued by GSEs — 1,740 — — — — — 1,740 Tax-exempt 11 15 392 425 — — 48 891 Other — — 9 9 27 6 18 69 Total AFS securities (1) $ 1,479 $ 1,852 $ 2,563 $ 783 $ 343 $ 6 $ 66 $ 7,092 Equity securities Common stock $ — $ — $ — $ — $ — $ — $ 3 $ 3 CRA investments — 24 — — — — 25 49 Preferred stock — — — — 82 17 9 108 Total equity securities (1) $ — $ 24 $ — $ — $ 82 $ 17 $ 37 $ 160 (1) For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

Loans, Leases and Allowance for

Loans, Leases and Allowance for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2023
Receivables [Abstract]
Financing Receivable, Troubled Debt Restructuring [Table Text Block]	The following table presents TDR loans by loan portfolio segment: December 31, 2022 Number of Loans Recorded Investment Other commercial and industrial 4 $ 2 CRE - owner occupied 1 1 Hotel franchise finance 1 10 Other CRE - non-owner occupied 1 1 Total 7 $ 14
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: June 30, 2023 December 31, 2022 (in millions) Warehouse lending $ 5,549 $ 5,561 Municipal & nonprofit 1,558 1,524 Tech & innovation 2,401 2,293 Equity fund resources 931 3,717 Other commercial and industrial 6,396 7,793 CRE - owner occupied 1,648 1,656 Hotel franchise finance 4,101 3,807 Other CRE - non-owner occupied 5,792 5,457 Residential 13,502 13,996 Residential - EBO 1,432 1,884 Construction and land development 4,403 3,995 Other 162 179 Total loans HFI 47,875 51,862 Allowance for credit losses (321) (310) Total loans HFI, net of allowance $ 47,554 $ 51,552
Contractual Aging of Loan Portfolio by Class of Loans Including Loans Held for Sale and Excluding Deferred Fees/Costs	The following table presents an aging analysis of past due loans by loan portfolio segment: June 30, 2023 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 5,549 $ — $ — $ — $ — $ 5,549 Municipal & nonprofit 1,558 — — — — 1,558 Tech & innovation 2,401 — — — — 2,401 Equity fund resources 931 — — — — 931 Other commercial and industrial 6,396 — — — — 6,396 CRE - owner occupied 1,648 — — — — 1,648 Hotel franchise finance 4,101 — — — — 4,101 Other CRE - non-owner occupied 5,792 — — — — 5,792 Residential 13,388 94 20 — 114 13,502 Residential - EBO 662 173 116 481 770 1,432 Construction and land development 4,396 7 — — 7 4,403 Other 162 — — — — 162 Total loans $ 46,984 $ 274 $ 136 $ 481 $ 891 $ 47,875 December 31, 2022 Current 30-59 Days 60-89 Days Over 90 days Total Total (in millions) Warehouse lending $ 5,561 $ — $ — $ — $ — $ 5,561 Municipal & nonprofit 1,524 — — — — 1,524 Tech & innovation 2,270 23 — — 23 2,293 Equity fund resources 3,717 — — — — 3,717 Other commercial and industrial 7,791 2 — — 2 7,793 CRE - owner occupied 1,656 — — — — 1,656 Hotel franchise finance 3,807 — — — — 3,807 Other CRE - non-owner occupied 5,454 3 — — 3 5,457 Residential 13,955 37 4 — 41 13,996 Residential - EBO 969 217 116 582 915 1,884 Construction and land development 3,995 — — — — 3,995 Other 178 1 — — 1 179 Total loans $ 50,877 $ 283 $ 120 $ 582 $ 985 $ 51,862
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: June 30, 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 $ 7 $ 13 $ — Tech & innovation — 7 7 — Other commercial and industrial 59 23 82 — CRE - owner occupied 16 2 18 — Other CRE - non-owner occupied 3 75 78 — Residential — 58 58 — Residential - EBO — — — 481 Total $ 84 $ 172 $ 256 $ 481 Loans contractually delinquent by 90 days or more and still accruing totaled $481 million at June 30, 2023 and consisted of government guaranteed EBO residential loans.
Loans by Risk Rating	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 six months ended June 30, 2023 2023 2022 2021 2020 2019 Prior (in millions) Warehouse lending Pass $ 387 $ 248 $ 320 $ 293 $ — $ — $ 4,301 $ 5,549 Special mention — — — — — — — — Classified — — — — — — — — Total $ 387 $ 248 $ 320 $ 293 $ — $ — $ 4,301 $ 5,549 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Municipal & nonprofit Pass $ 25 $ 131 $ 187 $ 186 $ 71 $ 927 $ — $ 1,527 Special mention — 7 — — — 11 — 18 Classified — — — — 6 7 — 13 Total $ 25 $ 138 $ 187 $ 186 $ 77 $ 945 $ — $ 1,558 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Tech & innovation Pass $ 226 $ 774 $ 275 $ 77 $ 53 $ 1 $ 908 $ 2,314 Special mention 12 32 — 6 — — 17 67 Classified 6 5 6 3 — — — 20 Total $ 244 $ 811 $ 281 $ 86 $ 53 $ 1 $ 925 $ 2,401 Current period gross charge-offs $ 2 $ — $ — $ — $ — $ — $ — $ 2 Equity fund resources Pass $ 116 $ 89 $ 48 $ 3 $ 12 $ 4 $ 659 $ 931 Special mention — — — — — — — — Classified — — — — — — — — Total $ 116 $ 89 $ 48 $ 3 $ 12 $ 4 $ 659 $ 931 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other commercial and industrial Pass $ 961 $ 1,804 $ 513 $ 194 $ 112 $ 284 $ 2,361 $ 6,229 Special mention 19 47 15 — — — — 81 Classified — 27 47 3 1 1 7 86 Total $ 980 $ 1,878 $ 575 $ 197 $ 113 $ 285 $ 2,368 $ 6,396 Current period gross charge-offs $ — $ 3 $ 6 $ 4 $ — $ — $ — $ 13 CRE - owner occupied Pass $ 57 $ 349 $ 359 $ 169 $ 142 $ 510 $ 35 $ 1,621 Special mention 2 — — — 1 1 — 4 Classified 3 — 6 3 4 7 — 23 Total $ 62 $ 349 $ 365 $ 172 $ 147 $ 518 $ 35 $ 1,648 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Hotel franchise finance Pass $ 439 $ 1,751 $ 663 $ 95 $ 465 $ 251 $ 118 $ 3,782 Special mention — — 40 — 40 21 — 101 Classified 27 9 20 26 112 24 — 218 Total $ 466 $ 1,760 $ 723 $ 121 $ 617 $ 296 $ 118 $ 4,101 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total As of and for the six months ended June 30, 2023 2023 2022 2021 2020 2019 Prior (in millions) Other CRE - non-owner occupied Pass $ 1,028 $ 2,121 $ 772 $ 670 $ 219 $ 277 $ 265 $ 5,352 Special mention 16 150 72 38 29 — 1 306 Classified — — 96 — 14 4 20 134 Total $ 1,044 $ 2,271 $ 940 $ 708 $ 262 $ 281 $ 286 $ 5,792 Current period gross charge-offs $ — $ — $ 2 $ — $ — $ — $ — $ 2 Residential Pass $ 177 $ 3,687 $ 8,207 $ 847 $ 284 $ 215 $ 27 $ 13,444 Special mention — — — — — — — — Classified — 18 32 3 3 2 — 58 Total $ 177 $ 3,705 $ 8,239 $ 850 $ 287 $ 217 $ 27 $ 13,502 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Residential - EBO Pass $ — $ 9 $ 248 $ 591 $ 291 $ 293 $ — $ 1,432 Special mention — — — — — — — — Classified — — — — — — — — Total $ — $ 9 $ 248 $ 591 $ 291 $ 293 $ — $ 1,432 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Construction and land development Pass $ 736 $ 1,859 $ 497 $ 138 $ — $ 2 $ 1,026 $ 4,258 Special mention — — 5 112 — — — 117 Classified — — 28 — — — — 28 Total $ 736 $ 1,859 $ 530 $ 250 $ — $ 2 $ 1,026 $ 4,403 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Other Pass $ 2 $ 14 $ 5 $ — $ 4 $ 66 $ 71 $ 162 Special mention — — — — — — — — Classified — — — — — — — — Total $ 2 $ 14 $ 5 $ — $ 4 $ 66 $ 71 $ 162 Current period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ — Total by Risk Category Pass $ 4,154 $ 12,836 $ 12,094 $ 3,263 $ 1,653 $ 2,830 $ 9,771 $ 46,601 Special mention 49 236 132 156 70 33 18 694 Classified 36 59 235 38 140 45 27 580 Total $ 4,239 $ 13,131 $ 12,461 $ 3,457 $ 1,863 $ 2,908 $ 9,816 $ 47,875 Current period gross charge-offs $ 2 $ 3 $ 8 $ 4 $ — $ — $ — $ 17 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total December 31, 2022 2022 2021 2020 2019 2018 Prior (in millions) Warehouse lending Pass $ 397 $ 41 $ 152 $ — $ — $ — $ 4,928 $ 5,518 Special mention 43 — — — — — — 43 Classified — — — — — — — — Total $ 440 $ 41 $ 152 $ — $ — $ — $ 4,928 $ 5,561 Municipal & nonprofit Pass $ 107 $ 185 $ 187 $ 78 $ 43 $ 917 $ — $ 1,517 Special mention — — — — — — — — Classified — — — — — 7 — 7 Total $ 107 $ 185 $ 187 $ 78 $ 43 $ 924 $ — $ 1,524 Tech & innovation Pass $ 813 $ 374 $ 87 $ 66 $ 4 $ 1 $ 853 $ 2,198 Special mention 36 22 3 — — — 20 81 Classified 2 12 — — — — — 14 Total $ 851 $ 408 $ 90 $ 66 $ 4 $ 1 $ 873 $ 2,293 Equity fund resources Pass $ 1,020 $ 1,189 $ 191 $ 16 $ — $ — $ 1,301 $ 3,717 Special mention — — — — — — — — Classified — — — — — — — — Total $ 1,020 $ 1,189 $ 191 $ 16 $ — $ — $ 1,301 $ 3,717 Other commercial and industrial Pass $ 2,968 $ 1,272 $ 262 $ 277 $ 312 $ 206 $ 2,406 $ 7,703 Special mention — 44 — — — — 3 47 Classified 3 21 10 3 3 1 2 43 Total $ 2,971 $ 1,337 $ 272 $ 280 $ 315 $ 207 $ 2,411 $ 7,793 CRE - owner occupied Pass $ 338 $ 359 $ 174 $ 157 $ 211 $ 339 $ 29 $ 1,607 Special mention — — — — — 1 — 1 Classified — 14 7 1 5 10 11 48 Total $ 338 $ 373 $ 181 $ 158 $ 216 $ 350 $ 40 $ 1,656 Hotel franchise finance Pass $ 1,762 $ 726 $ 54 $ 528 $ 290 $ 103 $ 118 $ 3,581 Special mention — — 26 — — — — 26 Classified 18 20 — 117 45 — — 200 Total $ 1,780 $ 746 $ 80 $ 645 $ 335 $ 103 $ 118 $ 3,807 Other CRE - non-owner occupied Pass $ 2,344 $ 1,201 $ 870 $ 264 $ 160 $ 218 $ 315 $ 5,372 Special mention 3 38 — 12 — — 1 54 Classified — 4 — 12 10 5 — 31 Total $ 2,347 $ 1,243 $ 870 $ 288 $ 170 $ 223 $ 316 $ 5,457 Residential Pass $ 4,041 $ 8,474 $ 878 $ 308 $ 150 $ 90 $ 36 $ 13,977 Special mention — — — — — — — — Classified 6 9 — 3 1 — — 19 Total $ 4,047 $ 8,483 $ 878 $ 311 $ 151 $ 90 $ 36 $ 13,996 Residential - EBO Pass $ 3 $ 268 $ 712 $ 454 $ 191 $ 256 $ — $ 1,884 Special mention — — — — — — — — Classified — — — — — — — — Total $ 3 $ 268 $ 712 $ 454 $ 191 $ 256 $ — $ 1,884 Term Loan Amortized Cost Basis by Origination Year Revolving Loans Amortized Cost Basis Total December 31, 2022 2022 2021 2020 2019 2018 Prior (in millions) Construction and land development Pass $ 1,533 $ 815 $ 273 $ 14 $ — $ — $ 1,258 $ 3,893 Special mention — — 98 — — — — 98 Classified — — — 4 — — — 4 Total $ 1,533 $ 815 $ 371 $ 18 $ — $ — $ 1,258 $ 3,995 Other Pass $ 23 $ 10 $ 13 $ 5 $ 2 $ 61 $ 64 $ 178 Special mention — — — — — 1 — 1 Classified — — — — — — — — Total $ 23 $ 10 $ 13 $ 5 $ 2 $ 62 $ 64 $ 179 Total by Risk Category Pass $ 15,349 $ 14,914 $ 3,853 $ 2,167 $ 1,363 $ 2,191 $ 11,308 $ 51,145 Special mention 82 104 127 12 — 2 24 351 Classified 29 80 17 140 64 23 13 366 Total $ 15,460 $ 15,098 $ 3,997 $ 2,319 $ 1,427 $ 2,216 $ 11,345 $ 51,862 Restructurings for Borrowers Experiencing Financial Difficulty The Company adopted the amendments in ASU 2022-02, which eliminated accounting guidance on TDR loans for creditors and requires enhanced disclosures for loan modifications to borrowers experiencing financial difficulty that were made on or after January 1, 2023. See “Note 1. Summary of Significant Accounting Policies” of these Notes to Unaudited Financial Statements for further discussion of the amendments in this update. The following table presents the amortized cost basis of loans HFI that were modified during the period by loan portfolio segment: Amortized Cost Basis at June 30, 2023 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Three Months Ended (dollars in millions) Other commercial and industrial $ — $ 27 $ — $ 27 0.4 % Hotel franchise finance — 9 — 9 0.2 Construction and land development — 28 — 28 0.6 Total $ — $ 64 $ — $ 64 0.1 % Amortized Cost Basis at June 30, 2023 Payment Delay and Term Extension Term Extension Payment Delay Total % of Total Class of Financing Receivable Six Months Ended (dollars in millions) Tech & innovation $ 2 $ — $ 5 $ 7 0.3 % Other commercial and industrial — 27 — 27 0.4 Hotel franchise finance — 27 — 27 0.7 Residential — — 1 1 0.0 Construction and land development — 28 — 28 0.6 Total $ 2 $ 82 $ 6 $ 90 0.2 % The performance of these modified loans is monitored for 12 months following the modification. As of June 30, 2023, modified loans on nonaccrual status totaled $35 million and the remaining $55 million were current with contractual payments.
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 June 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 6.6 $ (1.4) $ — $ — $ 5.2 Municipal & nonprofit 18.4 (1.9) — — 16.5 Tech & innovation 36.4 (2.8) — — 33.6 Equity fund resources 3.3 (1.6) — — 1.7 Other commercial and industrial 51.1 5.9 6.0 (0.8) 51.8 CRE - owner occupied 8.6 (0.6) — — 8.0 Hotel franchise finance 47.7 (2.0) — — 45.7 Other CRE - non-owner occupied 66.4 25.9 2.2 — 90.1 Residential 31.7 2.2 — — 33.9 Residential - EBO — — — — — Construction and land development 31.5 0.2 — — 31.7 Other 3.0 (0.1) — — 2.9 Total $ 304.7 $ 23.8 $ 8.2 $ (0.8) $ 321.1 Six Months Ended June 30, 2023 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 8.4 $ (3.2) $ — $ — $ 5.2 Municipal & nonprofit 15.9 0.6 — — 16.5 Tech & innovation 30.8 4.6 1.8 — 33.6 Equity fund resources 6.4 (4.7) — — 1.7 Other commercial and industrial 85.9 (24.8) 13.3 (4.0) 51.8 CRE - owner occupied 7.1 0.9 — — 8.0 Hotel franchise finance 46.9 (1.2) — — 45.7 Other CRE - non-owner occupied 47.4 44.9 2.2 — 90.1 Residential 30.4 3.5 — — 33.9 Residential - EBO — — — — — Construction and land development 27.4 4.3 — — 31.7 Other 3.1 (0.1) 0.1 — 2.9 Total $ 309.7 $ 24.8 $ 17.4 $ (4.0) $ 321.1 Three Months Ended June 30, 2022 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 2.9 $ 0.8 $ — $ — $ 3.7 Municipal & nonprofit 13.4 0.2 — — 13.6 Tech & innovation 28.0 (2.6) — — 25.4 Equity fund resources 6.6 7.4 — — 14.0 Other commercial and industrial 115.7 5.1 2.3 (0.7) 119.2 CRE - owner occupied 8.1 (0.7) — (0.1) 7.5 Hotel franchise finance 30.6 3.2 — — 33.8 Other CRE - non-owner occupied 15.3 6.8 — — 22.1 Residential 23.8 (5.0) — — 18.8 Construction and land development 10.7 1.5 — — 12.2 Other 2.5 0.3 0.1 (0.2) 2.9 Total $ 257.6 $ 17.0 $ 2.4 $ (1.0) $ 273.2 Six Months Ended June 30, 2022 Balance, Provision for (Recovery of) Credit Losses Charge-offs Recoveries Balance, (in millions) Warehouse lending $ 3.0 $ 0.7 $ — $ — $ 3.7 Municipal & nonprofit 13.7 (0.1) — — 13.6 Tech & innovation 25.7 (2.3) — (2.0) 25.4 Equity fund resources 9.6 4.4 — — 14.0 Other commercial and industrial 103.6 19.4 4.9 (1.1) 119.2 CRE - owner occupied 10.6 (3.2) — (0.1) 7.5 Hotel franchise finance 41.5 (7.7) — — 33.8 Other CRE - non-owner occupied 16.9 5.2 — — 22.1 Residential 12.5 6.3 — — 18.8 Construction and land development 12.5 (0.3) — — 12.2 Other 2.9 (0.1) 0.1 (0.2) 2.9 Total $ 252.5 $ 22.3 $ 5.0 $ (3.4) $ 273.2 Accrued interest receivable of $296 million and $304 million at June 30, 2023 and December 31, 2022, 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 $6 million and $9 million, as of June 30, 2023 and December 31, 2022, respectively. 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 Sheets. The below table reflects the activity in the ACL on unfunded loan commitments: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Balance, beginning of period $ 44.8 $ 43.3 $ 47.0 $ 37.6 Provision for credit losses (3.7) 10.5 (5.9) 16.2 Balance, end of period $ 41.1 $ 53.8 $ 41.1 $ 53.8 The following tables disaggregate the Company's ACL on funded loans HFI and loan balances by measurement methodology: June 30, 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 $ 5,549 $ — $ 5,549 $ 5.2 $ — $ 5.2 Municipal & nonprofit 1,545 13 1,558 14.0 2.5 16.5 Tech & innovation 2,383 18 2,401 30.1 3.5 33.6 Equity fund resources 931 — 931 1.7 — 1.7 Other commercial and industrial 6,312 84 6,396 46.3 5.5 51.8 CRE - owner occupied 1,628 20 1,648 8.0 — 8.0 Hotel franchise finance 3,884 217 4,101 45.7 — 45.7 Other CRE - non-owner occupied 5,659 133 5,792 87.2 2.9 90.1 Residential 13,502 — 13,502 33.9 — 33.9 Residential EBO 1,432 — 1,432 — — — Construction and land development 4,375 28 4,403 31.7 — 31.7 Other 162 — 162 2.9 — 2.9 Total $ 47,362 $ 513 $ 47,875 $ 306.7 $ 14.4 $ 321.1 December 31, 2022 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 $ 5,561 $ — $ 5,561 $ 8.4 $ — $ 8.4 Municipal & nonprofit 1,517 7 1,524 13.4 2.5 15.9 Tech & innovation 2,280 13 2,293 30.3 0.5 30.8 Equity fund resources 3,717 — 3,717 6.4 — 6.4 Other commercial and industrial 7,754 39 7,793 80.4 5.5 85.9 CRE - owner occupied 1,612 44 1,656 7.1 — 7.1 Hotel franchise finance 3,607 200 3,807 44.7 2.2 46.9 Other CRE - non-owner occupied 5,428 29 5,457 47.4 — 47.4 Residential 13,996 — 13,996 30.4 — 30.4 Residential EBO 1,884 — 1,884 — — — Construction and land development 3,991 4 3,995 27.4 — 27.4 Other 179 — 179 3.1 — 3.1 Total $ 51,526 $ 336 $ 51,862 $ 299.0 $ 10.7 $ 309.7

Other Borrowings (Tables)

Other Borrowings (Tables)	6 Months Ended
	Jun. 30, 2023
Debt Disclosure [Abstract]
Company's Borrowings	The following table summarizes the Company’s borrowings by type: June 30, 2023 December 31, 2022 (in millions) Short-Term: Federal funds purchased $ — $ 640 BTFP advances 1,300 — FHLB advances 4,900 4,300 Warehouse borrowings 55 — Repurchase agreements 2,482 27 Secured borrowings 62 25 Total short-term borrowings $ 8,799 $ 4,992 Long-Term: AmeriHome senior notes, net of fair value adjustment $ 314 $ 315 Credit linked notes, net of debt issuance costs 454 992 Total long-term borrowings $ 768 $ 1,307 Total other borrowings $ 9,567 $ 6,299

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2023
Equity [Abstract]
Summary of Changes in Accumulated Other Comprehensive Income	Three Months Ended June 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, March 31, 2023 $ (594.3) $ (0.3) $ 1.9 $ 1.2 $ (591.5) Other comprehensive (loss) income before reclassifications (34.2) — 5.0 — (29.2) Amounts reclassified from AOCI 10.2 — — — 10.2 Net current-period other comprehensive (loss) income (24.0) — 5.0 — (19.0) Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Balance, March 31, 2022 $ (236.3) $ (0.3) $ 1.5 $ — $ (235.1) Other comprehensive (loss) income before reclassifications (284.5) — 2.0 — (282.5) Amounts reclassified from AOCI (0.3) — — — (0.3) Net current-period other comprehensive (loss) income (284.8) — 2.0 — (282.8) Balance, June 30, 2022 $ (521.1) $ (0.3) $ 3.5 $ — $ (517.9) Six Months Ended June 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, 2022 $ (663.7) $ (0.3) $ 3.0 $ — $ (661.0) Other comprehensive income before reclassifications 25.9 — 3.9 1.2 31.0 Amounts reclassified from AOCI 19.5 — — — 19.5 Net current-period other comprehensive income 45.4 — 3.9 1.2 50.5 Balance, June 30, 2023 $ (618.3) $ (0.3) $ 6.9 $ 1.2 $ (610.5) Balance, December 31, 2021 $ 16.7 $ (0.3) $ (0.7) $ — $ 15.7 Other comprehensive (loss) income before reclassifications (532.4) — 4.2 — (528.2) Amounts reclassified from AOCI (5.4) — — — (5.4) Net current-period other comprehensive (loss) income (537.8) — 4.2 — (533.6) Balance, June 30, 2022 $ (521.1) $ (0.3) $ 3.5 $ — $ (517.9)

Derivatives and Hedging (Tables

Derivatives and Hedging (Tables)	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position		11. DERIVATIVES AND HEDGING ACTIVITIES The Company is a party to various derivative instruments. The primary types of derivatives that 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 Sheets, 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 and volatility of net interest income and EVE to interest rate fluctuations. 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 are based on LIBOR and 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 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. Under these interest rate swap contracts, the Company receives a variable rate based on SOFR and pays a fixed rate on the outstanding notional amount. The Company also had pay fixed/receive variable interest rate swaps, designated as fair value hedges using the last-of-layer method. Upon termination of these last-of-layer hedges in 2022, the cumulative basis adjustment on these hedges was allocated across the remaining loan pool and is being amortized over the remaining term. At June 30, 2023, the remaining cumulative basis adjustment on the terminated last-of-layer hedges totaled $15 million. Derivatives Not Designated in Hedge Relationships Management enters into certain foreign exchange derivative contracts, back-to-back interest rate contracts, and risk participation agreements 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. Contracts with customers, along with the related derivative trades that 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's back-to-back interest rate contracts are used to allow customers to manage long-term interest rate risk. 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 the participated loan. The Company also uses derivative financial instruments to manage exposure to interest rate risk within its mortgage banking business related to IRLCs and its inventory of loans HFS and MSRs. The Company economically hedges the changes in fair value associated with changes in interest rates generally by utilizing forward sale commitments, interest rate futures and interest rate swaps. Fair Value Hedges As of June 30, 2023 and December 31, 2022, the following amounts are reflected on the Consolidated Balance Sheets related to cumulative basis adjustments for outstanding fair value hedges: June 30, 2023 December 31, 2022 Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 3,934 $ 52 $ 447 $ 17 (1) Included in the carrying value of the hedged assets/(liabilities). (2) As of June 30, 2023, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.8 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $29 million. For the Company's derivative instruments that are designated and qualify as fair value hedges, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in current period earnings. The loss or gain on the hedged item is recognized in the same line item as the offsetting loss or gain on the related interest rate swaps. For loans, the gain or loss on the hedged item is included in interest income, as shown in the table below. Three Months Ended June 30, 2023 2022 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 $ 39.0 $ (39.0) $ 15.2 $ (15.2) Six Months Ended June 30, 2023 2022 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 $ 34.7 $ (34.7) $ 48.7 $ (48.7) In addition to the gains and losses on the Company's outstanding fair value hedges presented in the above table, the Company recognized $2.9 million and $5.9 million in interest income related to the amortization of the cumulative basis adjustment on its discontinued last-of-layer hedges during the three and six months ended June 30, 2023, respectively. 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 June 30, 2023, December 31, 2022, and June 30, 2022. The change in the notional amounts of these derivatives from June 30, 2022 to June 30, 2023 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. June 30, 2023 December 31, 2022 June 30, 2022 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 $ 4,033 $ 56 $ 4 $ 476 $ 18 $ — $ 500 $ 5 $ 11 Total $ 4,033 $ 56 $ 4 $ 476 $ 18 $ — $ 500 $ 5 $ 11 Derivatives not designated as hedging instruments (1): Foreign currency contracts $ 71 $ 1 $ 1 $ 250 $ 1 $ 9 $ 138 $ 1 $ — Forward purchase contracts 4,484 1 16 2,709 1 13 4,764 32 10 Forward sales contracts 7,279 26 2 4,985 16 8 9,621 35 35 Futures purchase contracts (2), (3) 200 — — — — — 700 — — Futures sales contracts (2), (3) 12,210 — — 8,706 — — 6,072 — — Interest rate lock commitments 2,331 6 4 1,459 5 3 2,819 15 3 Interest rate contracts 2,424 14 14 1,538 6 6 64 — — Risk participation agreements 44 — — 48 — — — — — Total $ 29,043 $ 48 $ 37 $ 19,695 $ 29 $ 39 $ 24,178 $ 83 $ 48 Margin 85 12 4 1 (9) 24 Total, including margin $ 29,043 $ 133 $ 49 $ 19,695 $ 33 $ 40 $ 24,178 $ 74 $ 72 (1) Relate to economic hedging arrangements. (2) The Company enters into forward 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 duration of only 0.25 years and are intended to cover the longer duration of MSR hedges. (3) The notional amounts previously reported for December 31, 2022 and June 30, 2022 have been adjusted in the current period to account for the impact of offsetting contracts. To close a futures contract prior to settlement, the Company purchases an offsetting future with the same terms as the original contract and these contracts no longer require settlement. The fair value of derivative contracts, after taking into account the effects of master netting agreements, is included in other assets or other liabilities on the Consolidated Balance Sheets, as summarized in the table below: June 30, 2023 December 31, 2022 June 30, 2022 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 Forward purchase contracts $ 1 $ — $ 1 $ 1 $ — $ 1 $ 31 $ — $ 31 Forward sales contracts 26 — 26 13 — 13 33 — 33 Interest rate contracts 70 — 70 18 — 18 5 — 5 Margin 85 — 85 4 — 4 (9) — (9) Netting — (28) (28) — (17) (17) — (55) (55) $ 182 $ (28) $ 154 $ 36 $ (17) $ 19 $ 60 $ (55) $ 5 Liabilities Forward purchase contracts $ (16) $ — $ (16) $ (12) $ — $ (12) $ (10) $ — $ (10) Forward sales contracts (2) — (2) (8) — (8) (34) — (34) Interest rate contracts (4) — (4) — — — (11) — (11) Margin (12) — (12) (1) — (1) (24) — (24) Netting — 28 28 — 17 17 — 55 55 $ (34) $ 28 $ (6) $ (21) $ 17 $ (4) $ (79) $ 55 $ (24) Derivatives not subject to master netting arrangements: Assets Foreign currency contracts $ 1 $ — $ 1 $ 1 $ — $ 1 $ 1 $ — $ 1 Forward purchase contracts — — — — — — 1 — 1 Forward sales contracts — — — 3 — 3 2 — 2 Interest rate lock commitments 6 — 6 5 — 5 15 — 15 Interest rate contracts — — — 6 — 6 — — — $ 7 $ — $ 7 $ 15 $ — $ 15 $ 19 $ — $ 19 Liabilities Foreign currency contracts $ (1) $ — $ (1) $ (9) $ — $ (9) $ — $ — $ — Forward purchase contracts — — — (1) — (1) — — — Forward sales contracts — — — — — — (1) — (1) Interest rate lock commitments (4) — (4) (3) — (3) (3) — (3) Interest rate contracts (14) — (14) (6) — (6) — — — $ (19) $ — $ (19) $ (19) $ — $ (19) $ (4) $ — $ (4) Total derivatives and margin Assets $ 189 $ (28) $ 161 $ 51 $ (17) $ 34 $ 79 $ (55) $ 24 Liabilities $ (53) $ 28 $ (25) $ (40) $ 17 $ (23) $ (83) $ 55 $ (28) The following table summarizes the net gain (loss) on derivatives included in income: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Net gain (loss) on loan origination and sale activities: Interest rate lock commitments $ (11.1) $ 23.2 $ 0.3 $ 2.4 Forward contracts 55.6 101.0 18.8 342.3 Interest rate swaps (4.6) — (3.3) — Other contracts 2.2 (6.1) 1.8 (9.8) Total gain $ 42.1 $ 118.1 $ 17.6 $ 334.9 Net loan servicing revenue: Forward contracts $ (13.2) $ (8.0) $ (14.7) $ (42.9) Futures contracts 18.7 (21.9) 14.7 (43.9) Interest rate swaps (36.5) — (17.6) — Total loss $ (31.0) $ (29.9) $ (17.6) $ (86.8) Counterparty Credit Risk
Schedule of Derivative Assets at Fair Value	As of June 30, 2023 and December 31, 2022, the following amounts are reflected on the Consolidated Balance Sheets related to cumulative basis adjustments for outstanding fair value hedges: June 30, 2023 December 31, 2022 Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) Carrying Value of Hedged Assets/(Liabilities) Cumulative Fair Value Hedging Adjustment (1) (in millions) Loans HFI, net of deferred loan fees and costs (2) $ 3,934 $ 52 $ 447 $ 17 (1) Included in the carrying value of the hedged assets/(liabilities). (2) As of June 30, 2023, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.8 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $29 million.
Derivative Instruments, Gain (Loss)	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 June 30, 2023 2022 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 $ 39.0 $ (39.0) $ 15.2 $ (15.2) Six Months Ended June 30, 2023 2022 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 $ 34.7 $ (34.7) $ 48.7 $ (48.7) In addition to the gains and losses on the Company's outstanding fair value hedges presented in the above table, the Company recognized $2.9 million and $5.9 million in interest income related to the amortization of the cumulative basis adjustment on its discontinued last-of-layer hedges during the three and six months ended June 30, 2023, respectively.

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table presents the calculation of basic and diluted EPS and summarizes the weighted average common shares excluded from the diluted EPS calculation due to their antidilutive effect: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions, except per share amounts) Weighted average shares - basic 108.3 107.3 108.2 106.7 Dilutive effect of stock awards — 0.4 0.1 0.4 Weighted average shares - diluted 108.3 107.7 108.3 107.1 Net income available to common stockholders $ 212.5 $ 257.0 $ 351.5 $ 493.9 Earnings per Common Share: Basic $ 1.96 $ 2.40 $ 3.25 $ 4.63 Diluted 1.96 2.39 3.24 4.61 Antidilutive restricted stock outstanding 0.4 — 0.2 —

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2023
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: June 30, 2023 December 31, 2022 (in millions) Commitments to extend credit, including unsecured loan commitments of $1,168 at June 30, 2023 and $1,209 at December 31, 2022 $ 15,319 $ 18,674 Credit card commitments and financial guarantees 405 379 Letters of credit, including unsecured letters of credit of $6 at June 30, 2023 and $7 at December 31, 2022 240 265 Total $ 15,964 $ 19,318

Fair Value Accounting (Tables)

Fair Value Accounting (Tables)	6 Months Ended
	Jun. 30, 2023
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:
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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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	he 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 June 30, Six Months Ended June 30, 2023 2022 2023 2022 (in millions) Beginning balance $ (64.0) $ (64.5) $ (62.5) $ (67.4) Change in fair value (1) 6.7 2.7 5.2 5.6 Ending balance $ (57.3) $ (61.8) $ (57.3) $ (61.8)
Assets Measured at Fair Value on Nonrecurring Basis	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 June 30, 2023: Loans HFI $ 368 $ — $ — $ 368 Other assets acquired through foreclosure 11 — — 11 As of December 31, 2022: Loans HFI $ 295 $ — $ — $ 295 Other assets acquired through foreclosure 11 — — 11
Estimated Fair Value of Financial Instruments	The estimated fair value of the Company’s financial instruments is as follows: June 30, 2023 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,367 $ — $ 1,186 $ — $ 1,186 AFS 8,631 2,313 6,318 — 8,631 Equity 139 122 17 — 139 Derivative assets (2) 104 — 98 6 104 Loans HFS (1) 3,156 — 3,136 20 3,156 Loans HFI, net 47,554 — — 44,772 44,772 Mortgage servicing rights 1,007 — — 1,007 1,007 Accrued interest receivable 348 — 348 — 348 Financial liabilities: Deposits $ 51,041 $ — $ 51,040 $ — $ 51,040 Other borrowings 9,567 — 9,490 — 9,490 Qualifying debt 888 — 620 69 689 Derivative liabilities (2) 41 — 37 4 41 Accrued interest payable 104 — 104 — 104 (1) Includes loans transferred from HFI to HFS. As these transferred loans are salable into active markets, the fair value is based on quoted market or contracted selling prices or a market price equivalent, which are categorized as Level 2 in the fair value hierarchy. (2) Derivative assets and liabilities exclude margin of $85 million and $12 million, respectively. December 31, 2022 Carrying Amount Fair Value Level 1 Level 2 Level 3 Total (in millions) Financial assets: Investment securities: HTM $ 1,289 $ — $ 1,112 $ — $ 1,112 AFS 7,092 24 7,068 — 7,092 Equity securities 160 135 25 — 160 Derivative assets (1) 51 — 42 5 47 Loans HFS 1,184 — 1,172 1 1,173 Loans HFI, net 51,552 — — 47,679 47,679 Mortgage servicing rights 1,148 — — 1,148 1,148 Accrued interest receivable 357 — 357 — 357 Financial liabilities: Deposits $ 53,644 $ — $ 53,698 $ — $ 53,698 Other borrowings 6,299 — 6,261 — 6,261 Qualifying debt 893 — 735 75 810 Derivative liabilities (1) 40 — 36 3 39 Accrued interest payable 35 — 35 — 35 (1) Derivative assets and liabilities exclude margin of $4 million and $1 million, respectively.

Segments (Tables)

Segments (Tables)	6 Months Ended
	Jun. 30, 2023
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 June 30, 2023: (in millions) Assets: Cash, cash equivalents, and investment securities $ 12,527 $ 13 $ 150 $ 12,364 Loans HFS 3,156 1,049 2,107 — Loans HFI, net of deferred fees and costs 47,875 28,139 19,736 — Less: allowance for credit losses (321) (269) (52) — Net loans HFI 47,554 27,870 19,684 — Other assets acquired through foreclosure, net 11 11 — — Goodwill and other intangible assets, net 674 293 381 — Other assets 4,238 567 1,693 1,978 Total assets $ 68,160 $ 29,803 $ 24,015 $ 14,342 Liabilities: Deposits $ 51,041 $ 21,460 $ 22,380 $ 7,201 Borrowings and qualifying debt 10,455 6 1,489 8,960 Other liabilities 979 70 173 736 Total liabilities 62,475 21,536 24,042 16,897 Allocated equity: 5,685 2,494 1,715 1,476 Total liabilities and stockholders' equity $ 68,160 $ 24,030 $ 25,757 $ 18,373 Excess funds provided (used) — (5,773) 1,742 4,031 Income Statement: Three Months Ended June 30, 2023: (in millions) Net interest income $ 550.3 $ 356.5 $ 204.8 $ (11.0) Provision for credit losses 21.8 18.2 1.9 1.7 Net interest income (expense) after provision for credit losses 528.5 338.3 202.9 (12.7) Non-interest income 119.0 30.8 86.1 2.1 Non-interest expense 387.4 147.7 232.3 7.4 Income (loss) before income taxes 260.1 221.4 56.7 (18.0) Income tax expense (benefit) 44.4 43.4 11.2 (10.2) Net income (loss) $ 215.7 $ 178.0 $ 45.5 $ (7.8) Six Months Ended June 30, 2023: (in millions) Net interest income $ 1,160.2 $ 746.0 $ 404.0 $ 10.2 Provision for credit losses 41.2 15.6 3.4 22.2 Net interest income (expense) after provision for credit losses 1,119.0 730.4 400.6 (12.0) Non-interest income 61.0 (65.9) 137.1 (10.2) Non-interest expense 735.3 283.6 424.4 27.3 Income (loss) before provision for income taxes 444.7 380.9 113.3 (49.5) Income tax expense 86.8 81.9 24.0 (19.1) Net income (loss) $ 357.9 $ 299.0 $ 89.3 $ (30.4) Balance Sheet: Consolidated Company Commercial Consumer Related Corporate At December 31, 2022: (in millions) Assets: Cash, cash equivalents, and investment securities $ 9,803 $ 12 $ — $ 9,791 Loans held for sale 1,184 — 1,184 — Loans, net of deferred fees and costs 51,862 31,414 20,448 — Less: allowance for credit losses (310) (262) (48) — Total loans 51,552 31,152 20,400 — Other assets acquired through foreclosure, net 11 11 — — Goodwill and other intangible assets, net 680 293 387 — Other assets 4,504 435 2,180 1,889 Total assets $ 67,734 $ 31,903 $ 24,151 $ 11,680 Liabilities: Deposits $ 53,644 $ 29,494 $ 18,492 $ 5,658 Borrowings and qualifying debt 7,192 27 340 6,825 Other liabilities 1,542 83 656 803 Total liabilities 62,378 29,604 19,488 13,286 Allocated equity: 5,356 2,684 1,691 981 Total liabilities and stockholders' equity $ 67,734 $ 32,288 $ 21,179 $ 14,267 Excess funds provided (used) — 385 (2,972) 2,587 Income Statements: Three Months Ended June 30, 2022: (in millions) Net interest income $ 525.0 $ 370.5 $ 219.4 $ (64.9) Provision for (recovery of) credit losses 27.5 32.7 (5.2) — Net interest income (expense) after provision for credit losses 497.5 337.8 224.6 (64.9) Non-interest income 95.0 18.0 74.6 2.4 Non-interest expense 268.9 115.9 139.1 13.9 Income (loss) before income taxes 323.6 239.9 160.1 (76.4) Income tax expense (benefit) 63.4 57.3 38.1 (32.0) Net income (loss) $ 260.2 $ 182.6 $ 122.0 $ (44.4) Six Months Ended June 30, 2022: (in millions) Net interest income $ 974.5 $ 705.3 $ 402.7 $ (133.5) Provision for (recovery of) credit losses 36.5 33.2 5.3 (2.0) Net interest income (expense) after provision for credit losses 938.0 672.1 397.4 (131.5) Non-interest income 201.3 34.9 153.8 12.6 Non-interest expense 517.5 230.4 264.1 23.0 Income (loss) before income taxes 621.8 476.6 287.1 (141.9) Income tax expense (benefit) 121.5 113.4 68.5 (60.4) Net income (loss) $ 500.3 $ 363.2 $ 218.6 $ (81.5)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2023 Subsidiary
Significant Of Accounting Policies [Line Items]
Number Of Unconsolidated Subsidiaries	8

Investment Securities - Carryin

Investment Securities - Carrying Amounts and Fair Values of Investment Securities (Detail) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	$ 139	[1]	$ 160	[2]
Debt Securities, Held-to-maturity	1,367		1,289
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	1		0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(182)		(177)
Debt Securities, Held-to-maturity, Fair Value	1,186		1,112
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	826		890
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3		9
Debt Securities, Available-for-sale	8,631	[1]	7,092	[2]
Securities available for sale Total, Amortized Cost	9,454		7,973
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	9		8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		1
Debt Securities, Available-for-sale	60		97
Securities available for sale Total, Amortized Cost	69		104
Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	73		39
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0
Debt Securities, Available-for-sale	338		390
Securities available for sale Total, Amortized Cost	411		429
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	192		198
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	0		0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(40)		(39)
Debt Securities, Held-to-maturity, Fair Value	152		159
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	230		243
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0
Debt Securities, Available-for-sale	1,141		1,199
Securities available for sale Total, Amortized Cost	1,371		1,442
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	376		383
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0
Debt Securities, Available-for-sale	1,765		1,740
Securities available for sale Total, Amortized Cost	2,141		2,123
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	1,175		1,091
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain	1		0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss	(142)		(138)
Debt Securities, Held-to-maturity, Fair Value	1,034		953
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	89		115
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		2
Debt Securities, Available-for-sale	830		891
Securities available for sale Total, Amortized Cost	919		1,004
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0
Debt Securities, Available-for-sale	2,286
Securities available for sale Total, Amortized Cost	2,286
CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	37		49
Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	100		108
Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	39		90
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0
Debt Securities, Available-for-sale	2,144		2,706
Securities available for sale Total, Amortized Cost	2,183		2,796
Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	10		12
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	3		6
Debt Securities, Available-for-sale	67		69
Securities available for sale Total, Amortized Cost	74		75
AAA [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0	[1]	0	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	1,244	[1]	1,479	[2]
AAA [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AAA [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AAA [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	1,115		1,158
AAA [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AAA [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	9		11
AAA [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
AAA [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
AAA [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
AAA [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	120		310
AAA [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Split-rated AAA/AA Plus [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	25	[1]	24	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	4,127	[1]	1,852	[2]
Split-rated AAA/AA Plus [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	60		97
Split-rated AAA/AA Plus [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Split-rated AAA/AA Plus [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
Split-rated AAA/AA Plus [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	1,765		1,740
Split-rated AAA/AA Plus [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	16		15
Split-rated AAA/AA Plus [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	2,286
Split-rated AAA/AA Plus [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	25		24
Split-rated AAA/AA Plus [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
Split-rated AAA/AA Plus [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Split-rated AAA/AA Plus [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AA Plus to AA- [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0	[1]	0	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	2,348	[1]	2,563	[2]
AA Plus to AA- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AA Plus to AA- [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AA Plus to AA- [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	25		41
AA Plus to AA- [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
AA Plus to AA- [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	354		392
AA Plus to AA- [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
AA Plus to AA- [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
AA Plus to AA- [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
AA Plus to AA- [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	1,960		2,121
AA Plus to AA- [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	9		9
A Plus to A- [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0	[1]	0	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	519	[1]	783	[2]
A Plus to A- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	70		74
A Plus to A- [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	376		425
A Plus to A- [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
A Plus to A- [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
A Plus to A- [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
A Plus to A- [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	64		275
A Plus to A- [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	9		9
BBB Plus to BBB- [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	53	[1]	82	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	248	[1]	343	[2]
BBB Plus to BBB- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BBB Plus to BBB- [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	219		316
BBB Plus to BBB- [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
BBB Plus to BBB- [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BBB Plus to BBB- [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
BBB Plus to BBB- [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
BBB Plus to BBB- [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
BBB Plus to BBB- [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	53		82
BBB Plus to BBB- [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BBB Plus to BBB- [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	29		27
BB Plus and below [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	37	[1]	17	[2]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	53	[1]	6	[2]
BB Plus and below [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BB Plus and below [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	49		0
BB Plus and below [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	1		0
BB Plus and below [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BB Plus and below [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
BB Plus and below [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
BB Plus and below [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
BB Plus and below [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	37		17
BB Plus and below [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
BB Plus and below [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	3		6
Corporate Credit Quality Indicator Unrated [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	24	[1]	37	[2]
Debt Securities, Held-to-maturity	1,367		1,289
Debt Securities, Available-for-sale	92	[1]	66	[2]
Corporate Credit Quality Indicator Unrated [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	192		198
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	1,175		1,091
Debt Securities, Available-for-sale	75		48
Corporate Credit Quality Indicator Unrated [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
Corporate Credit Quality Indicator Unrated [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	12		25
Corporate Credit Quality Indicator Unrated [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	10		9
Corporate Credit Quality Indicator Unrated [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	$ 17		$ 18
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

Investment Securities - Additio

Investment Securities - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) positions	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) positions	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) positions
Pledged Securities [Abstract]
Accrued Investment Income Receivable	$ 4,000		$ 4,000		$ 4,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | positions	797		797		832
Debt Securities, Available-for-sale, Realized Gain (Loss)	$ (13,600)	$ 400	$ (26,100)	$ 7,300
Debt Securities, Available-for-Sale, Pledged Status [Extensible Enumeration]	Asset Pledged as Collateral		Asset Pledged as Collateral		Asset Pledged as Collateral

Investment Securities - Unreali

Investment Securities - Unrealized Losses and Fair Value of Investment Securities in Continuous Unrealized Loss Position (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) positions	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) positions	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) positions
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on assets measured at fair value, net	$ 0.1	$ (10)	$ (8.4)	$ (16.7)
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	826		826		$ 890
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	804		804		571
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	22		22		319
Debt Securities, Available-for-sale, Unrealized Loss Position	6,266		6,266		6,900
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,563		5,563		2,467
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 703		$ 703		$ 4,433
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | positions	797		797		832
Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 73		$ 73		$ 39
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	71		71		11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2		2		28
Debt Securities, Available-for-sale, Unrealized Loss Position	335		335		383
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	320		320		120
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	15		15		263
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	376		376		383
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	368		368		301
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	8		8		82
Debt Securities, Available-for-sale, Unrealized Loss Position	1,747		1,747		1,701
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,508		1,508		1,101
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	239		239		600
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	89		89		115
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	83		83		22
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	6		6		93
Debt Securities, Available-for-sale, Unrealized Loss Position	825		825		830
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	695		695		78
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	130		130		752
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	230		230		243
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	229		229		216
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1		1		27
Debt Securities, Available-for-sale, Unrealized Loss Position	1,112		1,112		1,191
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,084		1,084		912
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	28		28		279
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	9		9		8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8		8		4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1		1		4
Debt Securities, Available-for-sale, Unrealized Loss Position	57		57		60
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	45		45		14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	12		12		46
Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	10		10		12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8		8		8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2		2		4
Debt Securities, Available-for-sale, Unrealized Loss Position	54		54		52
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	36		36		26
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	18		18		26
Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	39		39		90
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	37		37		9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2		2		81
Debt Securities, Available-for-sale, Unrealized Loss Position	2,136		2,136		2,683
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,875		1,875		216
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 261		$ 261		$ 2,467

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturities (Detail) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	$ 22
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	6
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost	1,114
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	22
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	6
Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value	31
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	33
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	975
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value	152
Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost	192
Debt Securities, Held-to-maturity	1,367		$ 1,289
Debt Securities, Held-to-maturity, Fair Value	1,186		1,112
Securities available for sale, Due in one year or less, Amortized Cost	2,286
Securities available for sale, After one year through five years, Amortized Cost	166
Securities available for sale, After five years through ten years, Amortized Cost	898
Securities available for sale, After ten years, Amortized Cost	2,523
Securities available for sale, Mortgage backed securities, Amortized Cost	3,581
Securities available for sale Total, Amortized Cost	9,454		7,973
Securities available for sale, Due in one year or less, Estimated Fair Value	2,285
Securities available for sale, After one year through five years, Estimated Fair Value	149
Securities available for sale, After five years through ten years, Estimated Fair Value	832
Securities available for sale, After ten years, Estimated Fair Value	2,399
Securities available for sale, Mortgage backed securities, Estimated Fair Value	2,966
Securities available for sale Total, Estimated Fair Value	$ 8,631	[1]	$ 7,092	[2]
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

Investment Securities - Investm

Investment Securities - Investment Securities by Credit Rating Type (Detail) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	$ 1,367		$ 1,289
Debt Securities, Available-for-sale	8,631	[1]	7,092	[2]
Investment securities - equity	139	[1]	160	[2]
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	1,765		1,740
Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	1,175		1,091
Debt Securities, Available-for-sale	830		891
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	60		97
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	192		198
Debt Securities, Available-for-sale	1,141		1,199
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	2,286
Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	100		108
Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	338		390
CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	37		49
Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	67		69
Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	2,144		2,706
Common Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	2		3
A Plus to A- [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	519	[1]	783	[2]
Investment securities - equity	0	[1]	0	[2]
A Plus to A- [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	376		425
A Plus to A- [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	0		0
Debt Securities, Available-for-sale	0		0
A Plus to A- [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
A Plus to A- [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
A Plus to A- [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	70		74
A Plus to A- [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	0		0
A Plus to A- [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	9		9
A Plus to A- [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	64		275
Corporate Credit Quality Indicator Unrated [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	1,367		1,289
Debt Securities, Available-for-sale	92	[1]	66	[2]
Investment securities - equity	24	[1]	37	[2]
Corporate Credit Quality Indicator Unrated [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Nontaxable Municipal Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	1,175		1,091
Debt Securities, Available-for-sale	75		48
Corporate Credit Quality Indicator Unrated [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Held-to-maturity	192		198
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0
Corporate Credit Quality Indicator Unrated [Member] | Preferred Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	10		9
Corporate Credit Quality Indicator Unrated [Member] | Corporate Bond Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | CRA investments [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	12		25
Corporate Credit Quality Indicator Unrated [Member] | Other Security Investments
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	17		18
Corporate Credit Quality Indicator Unrated [Member] | Collateralized Loan Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale	0		0
Corporate Credit Quality Indicator Unrated [Member] | Common Stock [Member]
Debt Securities, Available-for-sale [Line Items]
Investment securities - equity	$ 2		$ 3
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

Investment Securities - Gross G

Investment Securities - Gross Gains and (Losses) on Sales of Investments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-sale, Realized Gain (Loss)	$ (13,600)	$ 400	$ (26,100)	$ 7,300
Equity Securities, FV-NI, Realized Gain	0	0	0	0
Equity Securities, FV-NI, Realized Loss	0	600	0	600
Less: Net gains (losses) recognized on equity securities sold	0	(600)	0	(600)
Debt Securities, Available-for-Sale, Realized Gain	100	400	3,500	7,300
Debt Securities, Available-for-Sale, Realized Loss	$ (13,700)	0	$ (29,600)	0
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Debt and Equity Securities, Realized Gain (Loss)		$ (200)		$ 6,700

Investment Securities Investmen

Investment Securities Investment Securities - Allowance for Credit Losses - HTM (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest	$ 6	$ 3.2	$ 6	$ 3.2	$ 6.5	$ 5.2	$ 3.2	$ 5.2
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal)	0.5	0	(0.8)	(2)
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	$ 0	0	$ 0
Accrued Investment Income Receivable	4		4			4
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0		17.1
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0		0
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	4.4		4.4		$ 2.2	$ 0
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded	$ (2.2)		$ (21.5)

Loans Held For Sale (Details)

Loans Held For Sale (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	$ 3,156		$ 3,156		$ 1,184
Proceeds from Sale of Mortgage Loans Held-for-sale	(230.6)	$ (361.7)	(338)	$ (698.6)
MSR capitalized upon sale of loan	244.8	193.4	387.2	397.5
Provision for and change in estimate of liability for losses under representations and warranties	0.3	0.8	2.7	1.6
Change in fair value of loans held for sale	(9.7)	59.3	(3.1)	(6.9)
Unrealized Gain (Loss) on Derivatives	37.2	(49.8)	15	31.4
Derivative Instruments Not Designated as Hedging Instruments, Gain	4.9	167.9	2.5	303.5
Derivative, Gain (Loss) on Derivative, Net	42.1	118.1	17.5	334.9
Gain (Loss) on Sales of Loans, Net	46.9	9.9	66.3	28.5
Loan acquisition and origination fees	15.4	17.3	27.4	35.6
Net gain on loan origination and sale activities	62.3	$ 27.2	93.7	$ 64.1
Purchased from Ginnie Mae
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	3		3		0
Purchased from correspondent seller
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	816		816		591
Loans Insured or Guaranteed by US Government Authorities
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	819		819		591
US Government Agency Insured Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	538		538		593
Commercial Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	134		134		0
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	1,619		1,619		0
Residential Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans Receivable Held-for-sale, Amount	$ 46		$ 46		$ 0

Loans, Leases and Allowance f_2

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	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 47,875		$ 47,875			$ 51,862
Loans and Leases Receivable, Allowance	(321.1)	$ (273.2)	(321.1)	$ (273.2)	$ (304.7)	(309.7)	$ (257.6)	$ (252.5)
Loans, net	47,554		47,554			51,552
Net deferred loan fees and costs	(115)		(115)			(141)
Receivable with Imputed Interest, Premium	187		187			195
Loans Receivable Held-for-sale, Amount	3,156		3,156			1,184
Provision for Loan and Lease Losses	(23.8)	(17)	(24.8)	(22.3)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	8.2	2.4	17.4	5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	(0.8)	(1)	(4)	(3.4)
Warehouse lending [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,549		5,549			5,561
Loans and Leases Receivable, Allowance	(5.2)	(3.7)	(5.2)	(3.7)	(6.6)	(8.4)	(2.9)	(3)
Provision for Loan and Lease Losses	(1.4)	0.8	(3.2)	0.7
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Municipal and nonprofit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,558		1,558			1,524
Loans and Leases Receivable, Allowance	(16.5)	(13.6)	(16.5)	(13.6)	(18.4)	(15.9)	(13.4)	(13.7)
Provision for Loan and Lease Losses	1.9	0.2	(0.6)	(0.1)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Tech & Innovation [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,401		2,401			2,293
Loans and Leases Receivable, Allowance	(33.6)	(25.4)	(33.6)	(25.4)	(36.4)	(30.8)	(28)	(25.7)
Provision for Loan and Lease Losses	2.8	2.6	(4.6)	2.3
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	1.8	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	(2)
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	931		931			3,717
Loans and Leases Receivable, Allowance	(1.7)	(14)	(1.7)	(14)	(3.3)	(6.4)	(6.6)	(9.6)
Provision for Loan and Lease Losses	(1.6)	7.4	(4.7)	4.4
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Other commercial and industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,396		6,396			7,793
Loans and Leases Receivable, Allowance	(51.8)	(119.2)	(51.8)	(119.2)	(51.1)	(85.9)	(115.7)	(103.6)
Provision for Loan and Lease Losses	5.9	(5.1)	(24.8)	(19.4)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	6	2.3	13.3	4.9
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	(0.8)	(0.7)	(4)	(1.1)
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,648		1,648			1,656
Loans and Leases Receivable, Allowance	(8)	(7.5)	(8)	(7.5)	(8.6)	(7.1)	(8.1)	(10.6)
Provision for Loan and Lease Losses	0.6	(0.7)	(0.9)	(3.2)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	(0.1)	0	(0.1)
Hotel franchise finance [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,101		4,101			3,807
Loans and Leases Receivable, Allowance	(45.7)	(33.8)	(45.7)	(33.8)	(47.7)	(46.9)	(30.6)	(41.5)
Provision for Loan and Lease Losses	2	3.2	1.2	(7.7)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,792		5,792			5,457
Loans and Leases Receivable, Allowance	(90.1)	(22.1)	(90.1)	(22.1)	(66.4)	(47.4)	(15.3)	(16.9)
Provision for Loan and Lease Losses	(25.9)	6.8	(44.9)	5.2
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	2.2	0	2.2	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,502		13,502			13,996
Loans and Leases Receivable, Allowance	(33.9)	(18.8)	(33.9)	(18.8)	(31.7)	(30.4)	(23.8)	(12.5)
Provision for Loan and Lease Losses	(2.2)	5	(3.5)	(6.3)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,432		1,432			1,884
Loans and Leases Receivable, Allowance	0		0		0	0
Provision for Loan and Lease Losses	0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0		0
Construction And Land Development Land [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,403		4,403			3,995
Other, loan segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	162		162			179
Loans and Leases Receivable, Allowance	(2.9)	(2.9)	(2.9)	(2.9)	(3)	(3.1)	(2.5)	(2.9)
Provision for Loan and Lease Losses	(0.1)	0.3	(0.1)	(0.1)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0.1	0.1	0.1
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	(0.2)	0	(0.2)
Construction And Land Development [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,403		4,403			3,995
Loans and Leases Receivable, Allowance	(31.7)	(12.2)	(31.7)	(12.2)	$ (31.5)	$ (27.4)	$ (10.7)	$ (12.5)
Provision for Loan and Lease Losses	(0.2)	1.5	(4.3)	(0.3)
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	$ 0	$ 0	$ 0	$ 0

Loans, Leases and Allowance f_3

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	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	$ 172		$ 172		$ 65
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	481		481		582
Financing Receivable, Excluding Accrued Interest, Nonaccrual	256		256		85
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	84		84		20
Loans Receivable Held-for-sale, Amount	3,156		3,156		1,184
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	2.8	$ 1.2	3.6	$ 2.3
Loans and Leases Receivable, Net of Deferred Income	47,875		47,875		51,862
Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,549		5,549		5,561
Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	7		7		7
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	13		13		7
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	6		6		0
Loans and Leases Receivable, Net of Deferred Income	1,558		1,558		1,524
Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	7		7		1
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	7		7		1
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	0		0		0
Loans and Leases Receivable, Net of Deferred Income	2,401		2,401		2,293
Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	931		931		3,717
Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	23		23		23
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	82		82		24
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	59		59		1
Loans and Leases Receivable, Net of Deferred Income	6,396		6,396		7,793
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	2		2		2
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	18		18		12
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	16		16		10
Loans and Leases Receivable, Net of Deferred Income	1,648		1,648		1,656
Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss					10
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing					0
Financing Receivable, Excluding Accrued Interest, Nonaccrual					10
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance					0
Loans and Leases Receivable, Net of Deferred Income	4,101		4,101		3,807
Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	75		75		3
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	78		78		8
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	3		3		5
Loans and Leases Receivable, Net of Deferred Income	5,792		5,792		5,457
Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	58		58		19
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual	58		58		19
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	0		0		0
Loans and Leases Receivable, Net of Deferred Income	13,502		13,502		13,996
Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss	0		0		0
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing	481		481		582
Financing Receivable, Excluding Accrued Interest, Nonaccrual	0		0		0
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance	0		0		0
Loans and Leases Receivable, Net of Deferred Income	1,432		1,432		1,884
Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual with an Allowance for Credit Loss					0
Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing					0
Financing Receivable, Excluding Accrued Interest, Nonaccrual					4
Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance					4
Loans and Leases Receivable, Net of Deferred Income	4,403		4,403		3,995
Construction And Land Development Land [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,403		4,403		3,995
Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 162		$ 162		$ 179

Contractual Aging of Loan Portf

Contractual Aging of Loan Portfolio by Segment (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 47,875	$ 51,862
Financing Receivable, Originated in Current Fiscal Year	4,239	15,460
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,131	15,098
Financing Receivable, Originated Two Years before Latest Fiscal Year	12,461	3,997
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,457	2,319
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,863	1,427
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,908	2,216
Financing Receivable, Revolving	9,816	11,345
Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	46,601	51,145
Financing Receivable, Originated in Current Fiscal Year	4,154	15,349
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	12,836	14,914
Financing Receivable, Originated Two Years before Latest Fiscal Year	12,094	3,853
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,263	2,167
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,653	1,363
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,830	2,191
Financing Receivable, Revolving	9,771	11,308
Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	694	351
Financing Receivable, Originated in Current Fiscal Year	49	82
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	236	104
Financing Receivable, Originated Two Years before Latest Fiscal Year	132	127
Financing Receivable, Originated Three Years before Latest Fiscal Year	156	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	70	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33	2
Financing Receivable, Revolving	18	24
Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	580	366
Financing Receivable, Originated in Current Fiscal Year	36	29
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	59	80
Financing Receivable, Originated Two Years before Latest Fiscal Year	235	17
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	140
Financing Receivable, Originated Four Years before Latest Fiscal Year	140	64
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	45	23
Financing Receivable, Revolving	27	13
Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,549	5,561
Financing Receivable, Originated in Current Fiscal Year	387	440
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	248	41
Financing Receivable, Originated Two Years before Latest Fiscal Year	320	152
Financing Receivable, Originated Three Years before Latest Fiscal Year	293	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	4,301	4,928
Warehouse lending [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,549	5,518
Financing Receivable, Originated in Current Fiscal Year	387	397
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	248	41
Financing Receivable, Originated Two Years before Latest Fiscal Year	320	152
Financing Receivable, Originated Three Years before Latest Fiscal Year	293	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	4,301	4,928
Warehouse lending [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	43
Financing Receivable, Originated in Current Fiscal Year	0	43
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Warehouse lending [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,558	1,524
Financing Receivable, Originated in Current Fiscal Year	25	107
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	138	185
Financing Receivable, Originated Two Years before Latest Fiscal Year	187	187
Financing Receivable, Originated Three Years before Latest Fiscal Year	186	78
Financing Receivable, Originated Four Years before Latest Fiscal Year	77	43
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	945	924
Financing Receivable, Revolving	0	0
Municipal and nonprofit [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,527	1,517
Financing Receivable, Originated in Current Fiscal Year	25	107
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131	185
Financing Receivable, Originated Two Years before Latest Fiscal Year	187	187
Financing Receivable, Originated Three Years before Latest Fiscal Year	186	78
Financing Receivable, Originated Four Years before Latest Fiscal Year	71	43
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	927	917
Financing Receivable, Revolving	0	0
Municipal and nonprofit [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11	0
Financing Receivable, Revolving	0	0
Municipal and nonprofit [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13	7
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7	7
Financing Receivable, Revolving	0	0
Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,401	2,293
Financing Receivable, Originated in Current Fiscal Year	244	851
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	811	408
Financing Receivable, Originated Two Years before Latest Fiscal Year	281	90
Financing Receivable, Originated Three Years before Latest Fiscal Year	86	66
Financing Receivable, Originated Four Years before Latest Fiscal Year	53	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	925	873
Tech & Innovation [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,314	2,198
Financing Receivable, Originated in Current Fiscal Year	226	813
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	774	374
Financing Receivable, Originated Two Years before Latest Fiscal Year	275	87
Financing Receivable, Originated Three Years before Latest Fiscal Year	77	66
Financing Receivable, Originated Four Years before Latest Fiscal Year	53	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	908	853
Tech & Innovation [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	67	81
Financing Receivable, Originated in Current Fiscal Year	12	36
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	32	22
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	3
Financing Receivable, Originated Three Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	17	20
Tech & Innovation [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	20	14
Financing Receivable, Originated in Current Fiscal Year	6	2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5	12
Financing Receivable, Originated Two Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	931	3,717
Financing Receivable, Originated in Current Fiscal Year	116	1,020
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	89	1,189
Financing Receivable, Originated Two Years before Latest Fiscal Year	48	191
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	12	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	0
Financing Receivable, Revolving	659	1,301
Equity fund resources | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	931	3,717
Financing Receivable, Originated in Current Fiscal Year	116	1,020
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	89	1,189
Financing Receivable, Originated Two Years before Latest Fiscal Year	48	191
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	12	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	0
Financing Receivable, Revolving	659	1,301
Equity fund resources | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Equity fund resources | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,396	7,793
Financing Receivable, Originated in Current Fiscal Year	980	2,971
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,878	1,337
Financing Receivable, Originated Two Years before Latest Fiscal Year	575	272
Financing Receivable, Originated Three Years before Latest Fiscal Year	197	280
Financing Receivable, Originated Four Years before Latest Fiscal Year	113	315
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	285	207
Financing Receivable, Revolving	2,368	2,411
Other commercial and industrial [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	6,229	7,703
Financing Receivable, Originated in Current Fiscal Year	961	2,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,804	1,272
Financing Receivable, Originated Two Years before Latest Fiscal Year	513	262
Financing Receivable, Originated Three Years before Latest Fiscal Year	194	277
Financing Receivable, Originated Four Years before Latest Fiscal Year	112	312
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	284	206
Financing Receivable, Revolving	2,361	2,406
Other commercial and industrial [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	81	47
Financing Receivable, Originated in Current Fiscal Year	19	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	47	44
Financing Receivable, Originated Two Years before Latest Fiscal Year	15	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	3
Other commercial and industrial [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	86	43
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	27	21
Financing Receivable, Originated Two Years before Latest Fiscal Year	47	10
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	1	3
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	7	2
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,648	1,656
Financing Receivable, Originated in Current Fiscal Year	62	338
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	349	373
Financing Receivable, Originated Two Years before Latest Fiscal Year	365	181
Financing Receivable, Originated Three Years before Latest Fiscal Year	172	158
Financing Receivable, Originated Four Years before Latest Fiscal Year	147	216
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	518	350
Financing Receivable, Revolving	35	40
Commercial Real Estate Owner Occupied [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,621	1,607
Financing Receivable, Originated in Current Fiscal Year	57	338
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	349	359
Financing Receivable, Originated Two Years before Latest Fiscal Year	359	174
Financing Receivable, Originated Three Years before Latest Fiscal Year	169	157
Financing Receivable, Originated Four Years before Latest Fiscal Year	142	211
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	510	339
Financing Receivable, Revolving	35	29
Commercial Real Estate Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4	1
Financing Receivable, Originated in Current Fiscal Year	2	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	1	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	0	0
Commercial Real Estate Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	23	48
Financing Receivable, Originated in Current Fiscal Year	3	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	14
Financing Receivable, Originated Two Years before Latest Fiscal Year	6	7
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	1
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7	10
Financing Receivable, Revolving	0	11
Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,101	3,807
Financing Receivable, Originated in Current Fiscal Year	466	1,780
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,760	746
Financing Receivable, Originated Two Years before Latest Fiscal Year	723	80
Financing Receivable, Originated Three Years before Latest Fiscal Year	121	645
Financing Receivable, Originated Four Years before Latest Fiscal Year	617	335
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	296	103
Financing Receivable, Revolving	118	118
Hotel franchise finance [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	3,782	3,581
Financing Receivable, Originated in Current Fiscal Year	439	1,762
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,751	726
Financing Receivable, Originated Two Years before Latest Fiscal Year	663	54
Financing Receivable, Originated Three Years before Latest Fiscal Year	95	528
Financing Receivable, Originated Four Years before Latest Fiscal Year	465	290
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	251	103
Financing Receivable, Revolving	118	118
Hotel franchise finance [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	101	26
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	40	26
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	40	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	21	0
Financing Receivable, Revolving	0	0
Hotel franchise finance [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	218	200
Financing Receivable, Originated in Current Fiscal Year	27	18
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	20
Financing Receivable, Originated Two Years before Latest Fiscal Year	20	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	26	117
Financing Receivable, Originated Four Years before Latest Fiscal Year	112	45
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	24	0
Financing Receivable, Revolving	0	0
Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,792	5,457
Financing Receivable, Originated in Current Fiscal Year	1,044	2,347
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,271	1,243
Financing Receivable, Originated Two Years before Latest Fiscal Year	940	870
Financing Receivable, Originated Three Years before Latest Fiscal Year	708	288
Financing Receivable, Originated Four Years before Latest Fiscal Year	262	170
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	281	223
Financing Receivable, Revolving	286	316
Other Commercial Real Estate Non owner Occupied [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,352	5,372
Financing Receivable, Originated in Current Fiscal Year	1,028	2,344
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,121	1,201
Financing Receivable, Originated Two Years before Latest Fiscal Year	772	870
Financing Receivable, Originated Three Years before Latest Fiscal Year	670	264
Financing Receivable, Originated Four Years before Latest Fiscal Year	219	160
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	277	218
Financing Receivable, Revolving	265	315
Other Commercial Real Estate Non owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	306	54
Financing Receivable, Originated in Current Fiscal Year	16	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	150	38
Financing Receivable, Originated Two Years before Latest Fiscal Year	72	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	29	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	1	1
Other Commercial Real Estate Non owner Occupied [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	134	31
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	4
Financing Receivable, Originated Two Years before Latest Fiscal Year	96	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	14	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	5
Financing Receivable, Revolving	20	0
Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,502	13,996
Financing Receivable, Originated in Current Fiscal Year	177	4,047
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,705	8,483
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,239	878
Financing Receivable, Originated Three Years before Latest Fiscal Year	850	311
Financing Receivable, Originated Four Years before Latest Fiscal Year	287	151
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	217	90
Financing Receivable, Revolving	27	36
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13,444	13,977
Financing Receivable, Originated in Current Fiscal Year	177	4,041
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,687	8,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,207	878
Financing Receivable, Originated Three Years before Latest Fiscal Year	847	308
Financing Receivable, Originated Four Years before Latest Fiscal Year	284	150
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	215	90
Financing Receivable, Revolving	27	36
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	58	19
Financing Receivable, Originated in Current Fiscal Year	0	6
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	18	9
Financing Receivable, Originated Two Years before Latest Fiscal Year	32	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	3	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	0	0
Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,432	1,884
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	268
Financing Receivable, Originated Two Years before Latest Fiscal Year	248	712
Financing Receivable, Originated Three Years before Latest Fiscal Year	591	454
Financing Receivable, Originated Four Years before Latest Fiscal Year	291	191
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	293	256
Financing Receivable, Revolving	0	0
Residential - EBO | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,432	1,884
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	268
Financing Receivable, Originated Two Years before Latest Fiscal Year	248	712
Financing Receivable, Originated Three Years before Latest Fiscal Year	591	454
Financing Receivable, Originated Four Years before Latest Fiscal Year	291	191
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	293	256
Financing Receivable, Revolving	0	0
Residential - EBO | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Residential - EBO | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Construction And Land Development Land [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,403	3,995
Financing Receivable, Originated in Current Fiscal Year	736	1,533
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,859	815
Financing Receivable, Originated Two Years before Latest Fiscal Year	530	371
Financing Receivable, Originated Three Years before Latest Fiscal Year	250	18
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	1,026	1,258
Construction And Land Development Land [Member] | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,258	3,893
Financing Receivable, Originated in Current Fiscal Year	736	1,533
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,859	815
Financing Receivable, Originated Two Years before Latest Fiscal Year	497	273
Financing Receivable, Originated Three Years before Latest Fiscal Year	138	14
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	1,026	1,258
Construction And Land Development Land [Member] | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	117	98
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	98
Financing Receivable, Originated Three Years before Latest Fiscal Year	112	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Construction And Land Development Land [Member] | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	28	4
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	28	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	4
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	4,403	3,995
Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	162	179
Financing Receivable, Originated in Current Fiscal Year	2	23
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14	10
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	66	62
Financing Receivable, Revolving	71	64
Other, loan segment | Pass [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	162	178
Financing Receivable, Originated in Current Fiscal Year	2	23
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14	10
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	66	61
Financing Receivable, Revolving	71	64
Other, loan segment | Special Mention [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	1
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	1
Financing Receivable, Revolving	0	0
Other, loan segment | Substandard [Member]
Financing Receivable, Nonaccrual [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	274	283
Financial Asset, 30 to 59 Days Past Due [Member] | Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	23
Financial Asset, 30 to 59 Days Past Due [Member] | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	2
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	3
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	94	37
Financial Asset, 30 to 59 Days Past Due [Member] | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	173	217
Financial Asset, 30 to 59 Days Past Due [Member] | Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	7	0
Financial Asset, 30 to 59 Days Past Due [Member] | Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	1
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	136	120
Financial Asset, 60 to 89 Days Past Due [Member] | Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	20	4
Financial Asset, 60 to 89 Days Past Due [Member] | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	116	116
Financial Asset, 60 to 89 Days Past Due [Member] | Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, 60 to 89 Days Past Due [Member] | Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	481	582
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	481	582
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, 90 Days or More Past Due, Still Accruing	0	0
Financial Asset, Not Past Due
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	46,984	50,877
Financial Asset, Not Past Due | Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	5,549	5,561
Financial Asset, Not Past Due | Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,558	1,524
Financial Asset, Not Past Due | Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,401	2,270
Financial Asset, Not Past Due | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	931	3,717
Financial Asset, Not Past Due | Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	6,396	7,791
Financial Asset, Not Past Due | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,648	1,656
Financial Asset, Not Past Due | Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,101	3,807
Financial Asset, Not Past Due | Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	5,792	5,454
Financial Asset, Not Past Due | Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	13,388	13,955
Financial Asset, Not Past Due | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	662	969
Financial Asset, Not Past Due | Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,396	3,995
Financial Asset, Not Past Due | Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	162	178
Financial Asset, Past Due
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	891	985
Financial Asset, Past Due | Warehouse lending [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due | Municipal and nonprofit [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due | Tech & Innovation [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	23
Financial Asset, Past Due | Equity fund resources
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due | Other commercial and industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	2
Financial Asset, Past Due | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due | Hotel franchise finance [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	0
Financial Asset, Past Due | Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	0	3
Financial Asset, Past Due | Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	114	41
Financial Asset, Past Due | Residential - EBO
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	770	915
Financial Asset, Past Due | Construction And Land Development [Member]
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	7	0
Financial Asset, Past Due | Other, loan segment
Financing Receivable, Nonaccrual [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 0	$ 1

Loans, Leases and Allowance f_4

Loans, Leases and Allowance for Credit Losses - Loans by Risk Rating (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	$ 4,239	$ 15,460
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,131	15,098
Financing Receivable, Originated Two Years before Latest Fiscal Year	12,461	3,997
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,457	2,319
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,863	1,427
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,908	2,216
Financing Receivable, Revolving	9,816	11,345
Loans and Leases Receivable, Net of Deferred Income	47,875	51,862
Financing Receivable, Allowance for Credit Loss, Writeoff	17
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	4
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	8
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	2
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	4,154	15,349
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	12,836	14,914
Financing Receivable, Originated Two Years before Latest Fiscal Year	12,094	3,853
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,263	2,167
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,653	1,363
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,830	2,191
Financing Receivable, Revolving	9,771	11,308
Loans and Leases Receivable, Net of Deferred Income	46,601	51,145
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	49	82
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	236	104
Financing Receivable, Originated Two Years before Latest Fiscal Year	132	127
Financing Receivable, Originated Three Years before Latest Fiscal Year	156	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	70	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	33	2
Financing Receivable, Revolving	18	24
Loans and Leases Receivable, Net of Deferred Income	694	351
Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	36	29
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	59	80
Financing Receivable, Originated Two Years before Latest Fiscal Year	235	17
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	140
Financing Receivable, Originated Four Years before Latest Fiscal Year	140	64
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	45	23
Financing Receivable, Revolving	27	13
Loans and Leases Receivable, Net of Deferred Income	580	366
Warehouse lending [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	387	440
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	248	41
Financing Receivable, Originated Two Years before Latest Fiscal Year	320	152
Financing Receivable, Originated Three Years before Latest Fiscal Year	293	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	4,301	4,928
Loans and Leases Receivable, Net of Deferred Income	5,549	5,561
Warehouse lending [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	387	397
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	248	41
Financing Receivable, Originated Two Years before Latest Fiscal Year	320	152
Financing Receivable, Originated Three Years before Latest Fiscal Year	293	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	4,301	4,928
Loans and Leases Receivable, Net of Deferred Income	5,549	5,518
Warehouse lending [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	43
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	43
Warehouse lending [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Municipal and nonprofit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	25	107
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	138	185
Financing Receivable, Originated Two Years before Latest Fiscal Year	187	187
Financing Receivable, Originated Three Years before Latest Fiscal Year	186	78
Financing Receivable, Originated Four Years before Latest Fiscal Year	77	43
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	945	924
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,558	1,524
Municipal and nonprofit [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	25	107
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	131	185
Financing Receivable, Originated Two Years before Latest Fiscal Year	187	187
Financing Receivable, Originated Three Years before Latest Fiscal Year	186	78
Financing Receivable, Originated Four Years before Latest Fiscal Year	71	43
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	927	917
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,527	1,517
Municipal and nonprofit [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	18	0
Municipal and nonprofit [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7	7
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	13	7
Tech & Innovation [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	244	851
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	811	408
Financing Receivable, Originated Two Years before Latest Fiscal Year	281	90
Financing Receivable, Originated Three Years before Latest Fiscal Year	86	66
Financing Receivable, Originated Four Years before Latest Fiscal Year	53	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	925	873
Loans and Leases Receivable, Net of Deferred Income	2,401	2,293
Financing Receivable, Allowance for Credit Loss, Writeoff	2
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	2
Tech & Innovation [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	226	813
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	774	374
Financing Receivable, Originated Two Years before Latest Fiscal Year	275	87
Financing Receivable, Originated Three Years before Latest Fiscal Year	77	66
Financing Receivable, Originated Four Years before Latest Fiscal Year	53	4
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	908	853
Loans and Leases Receivable, Net of Deferred Income	2,314	2,198
Tech & Innovation [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	12	36
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	32	22
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	3
Financing Receivable, Originated Three Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	17	20
Loans and Leases Receivable, Net of Deferred Income	67	81
Tech & Innovation [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	6	2
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5	12
Financing Receivable, Originated Two Years before Latest Fiscal Year	6	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	20	14
Equity fund resources
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	116	1,020
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	89	1,189
Financing Receivable, Originated Two Years before Latest Fiscal Year	48	191
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	12	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	0
Financing Receivable, Revolving	659	1,301
Loans and Leases Receivable, Net of Deferred Income	931	3,717
Equity fund resources | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	116	1,020
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	89	1,189
Financing Receivable, Originated Two Years before Latest Fiscal Year	48	191
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	16
Financing Receivable, Originated Four Years before Latest Fiscal Year	12	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	0
Financing Receivable, Revolving	659	1,301
Loans and Leases Receivable, Net of Deferred Income	931	3,717
Equity fund resources | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Equity fund resources | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Other commercial and industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	980	2,971
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,878	1,337
Financing Receivable, Originated Two Years before Latest Fiscal Year	575	272
Financing Receivable, Originated Three Years before Latest Fiscal Year	197	280
Financing Receivable, Originated Four Years before Latest Fiscal Year	113	315
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	285	207
Financing Receivable, Revolving	2,368	2,411
Loans and Leases Receivable, Net of Deferred Income	6,396	7,793
Financing Receivable, Allowance for Credit Loss, Writeoff	13
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	4
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	6
Other commercial and industrial [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	961	2,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,804	1,272
Financing Receivable, Originated Two Years before Latest Fiscal Year	513	262
Financing Receivable, Originated Three Years before Latest Fiscal Year	194	277
Financing Receivable, Originated Four Years before Latest Fiscal Year	112	312
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	284	206
Financing Receivable, Revolving	2,361	2,406
Loans and Leases Receivable, Net of Deferred Income	6,229	7,703
Other commercial and industrial [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	19	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	47	44
Financing Receivable, Originated Two Years before Latest Fiscal Year	15	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	3
Loans and Leases Receivable, Net of Deferred Income	81	47
Other commercial and industrial [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	27	21
Financing Receivable, Originated Two Years before Latest Fiscal Year	47	10
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	1	3
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	7	2
Loans and Leases Receivable, Net of Deferred Income	86	43
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	62	338
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	349	373
Financing Receivable, Originated Two Years before Latest Fiscal Year	365	181
Financing Receivable, Originated Three Years before Latest Fiscal Year	172	158
Financing Receivable, Originated Four Years before Latest Fiscal Year	147	216
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	518	350
Financing Receivable, Revolving	35	40
Loans and Leases Receivable, Net of Deferred Income	1,648	1,656
Commercial Real Estate Owner Occupied [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	57	338
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	349	359
Financing Receivable, Originated Two Years before Latest Fiscal Year	359	174
Financing Receivable, Originated Three Years before Latest Fiscal Year	169	157
Financing Receivable, Originated Four Years before Latest Fiscal Year	142	211
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	510	339
Financing Receivable, Revolving	35	29
Loans and Leases Receivable, Net of Deferred Income	1,621	1,607
Commercial Real Estate Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	2	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	1	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	1
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	4	1
Commercial Real Estate Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	3	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	14
Financing Receivable, Originated Two Years before Latest Fiscal Year	6	7
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	1
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	5
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7	10
Financing Receivable, Revolving	0	11
Loans and Leases Receivable, Net of Deferred Income	23	48
Hotel franchise finance [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	466	1,780
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,760	746
Financing Receivable, Originated Two Years before Latest Fiscal Year	723	80
Financing Receivable, Originated Three Years before Latest Fiscal Year	121	645
Financing Receivable, Originated Four Years before Latest Fiscal Year	617	335
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	296	103
Financing Receivable, Revolving	118	118
Loans and Leases Receivable, Net of Deferred Income	4,101	3,807
Hotel franchise finance [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	439	1,762
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,751	726
Financing Receivable, Originated Two Years before Latest Fiscal Year	663	54
Financing Receivable, Originated Three Years before Latest Fiscal Year	95	528
Financing Receivable, Originated Four Years before Latest Fiscal Year	465	290
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	251	103
Financing Receivable, Revolving	118	118
Loans and Leases Receivable, Net of Deferred Income	3,782	3,581
Hotel franchise finance [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	40	26
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	40	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	21	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	101	26
Hotel franchise finance [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	27	18
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	20
Financing Receivable, Originated Two Years before Latest Fiscal Year	20	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	26	117
Financing Receivable, Originated Four Years before Latest Fiscal Year	112	45
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	24	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	218	200
Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,044	2,347
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,271	1,243
Financing Receivable, Originated Two Years before Latest Fiscal Year	940	870
Financing Receivable, Originated Three Years before Latest Fiscal Year	708	288
Financing Receivable, Originated Four Years before Latest Fiscal Year	262	170
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	281	223
Financing Receivable, Revolving	286	316
Loans and Leases Receivable, Net of Deferred Income	5,792	5,457
Financing Receivable, Allowance for Credit Loss, Writeoff	2
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	2
Other Commercial Real Estate Non owner Occupied [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,028	2,344
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,121	1,201
Financing Receivable, Originated Two Years before Latest Fiscal Year	772	870
Financing Receivable, Originated Three Years before Latest Fiscal Year	670	264
Financing Receivable, Originated Four Years before Latest Fiscal Year	219	160
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	277	218
Financing Receivable, Revolving	265	315
Loans and Leases Receivable, Net of Deferred Income	5,352	5,372
Other Commercial Real Estate Non owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	16	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	150	38
Financing Receivable, Originated Two Years before Latest Fiscal Year	72	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	38	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	29	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	1	1
Loans and Leases Receivable, Net of Deferred Income	306	54
Other Commercial Real Estate Non owner Occupied [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	4
Financing Receivable, Originated Two Years before Latest Fiscal Year	96	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	12
Financing Receivable, Originated Four Years before Latest Fiscal Year	14	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4	5
Financing Receivable, Revolving	20	0
Loans and Leases Receivable, Net of Deferred Income	134	31
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	177	4,047
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,705	8,483
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,239	878
Financing Receivable, Originated Three Years before Latest Fiscal Year	850	311
Financing Receivable, Originated Four Years before Latest Fiscal Year	287	151
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	217	90
Financing Receivable, Revolving	27	36
Loans and Leases Receivable, Net of Deferred Income	13,502	13,996
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	177	4,041
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,687	8,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,207	878
Financing Receivable, Originated Three Years before Latest Fiscal Year	847	308
Financing Receivable, Originated Four Years before Latest Fiscal Year	284	150
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	215	90
Financing Receivable, Revolving	27	36
Loans and Leases Receivable, Net of Deferred Income	13,444	13,977
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	6
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	18	9
Financing Receivable, Originated Two Years before Latest Fiscal Year	32	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	3	3
Financing Receivable, Originated Four Years before Latest Fiscal Year	3	1
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	58	19
Residential - EBO
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	268
Financing Receivable, Originated Two Years before Latest Fiscal Year	248	712
Financing Receivable, Originated Three Years before Latest Fiscal Year	591	454
Financing Receivable, Originated Four Years before Latest Fiscal Year	291	191
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	293	256
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,432	1,884
Residential - EBO | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	3
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	9	268
Financing Receivable, Originated Two Years before Latest Fiscal Year	248	712
Financing Receivable, Originated Three Years before Latest Fiscal Year	591	454
Financing Receivable, Originated Four Years before Latest Fiscal Year	291	191
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	293	256
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	1,432	1,884
Residential - EBO | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Residential - EBO | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	0
Construction And Land Development Land [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	736	1,533
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,859	815
Financing Receivable, Originated Two Years before Latest Fiscal Year	530	371
Financing Receivable, Originated Three Years before Latest Fiscal Year	250	18
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	1,026	1,258
Loans and Leases Receivable, Net of Deferred Income	4,403	3,995
Construction And Land Development Land [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	736	1,533
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,859	815
Financing Receivable, Originated Two Years before Latest Fiscal Year	497	273
Financing Receivable, Originated Three Years before Latest Fiscal Year	138	14
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	0
Financing Receivable, Revolving	1,026	1,258
Loans and Leases Receivable, Net of Deferred Income	4,258	3,893
Construction And Land Development Land [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	98
Financing Receivable, Originated Three Years before Latest Fiscal Year	112	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	117	98
Construction And Land Development Land [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	28	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	4
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	28	4
Other, loan segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	2	23
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14	10
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	66	62
Financing Receivable, Revolving	71	64
Loans and Leases Receivable, Net of Deferred Income	162	179
Other, loan segment | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	2	23
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14	10
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	13
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	66	61
Financing Receivable, Revolving	71	64
Loans and Leases Receivable, Net of Deferred Income	162	178
Other, loan segment | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	1
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	0	1
Other, loan segment | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 0

Loans, Leases and Allowance f_5

Loans, Leases and Allowance for Credit Losses Loans, Leases and Allowance for Credit Losses - Troubled Debt Restructurings (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 SecurityLoan	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) SecurityLoan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | SecurityLoan		0
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend				$ 0
Financing Receivable, Modifications, Number of Contracts | SecurityLoan		1
Reserves allocated to customers whose loan terms modified in troubled debt restructurings				$ 4,000,000
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.10%		0.20%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 64,000,000		$ 90,000,000
Financing Receivable, Troubled Debt Restructured Loans, Number of Outstanding Contracts | SecurityLoan				7
Financing Receivable, Troubled Debt Restructuring				$ 14,000,000
Financing Receivable, Modified, Nonaccrual	35,000,000		35,000,000
Financing Receivable, Modified, Accrual Status	55,000,000		55,000,000
Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 64,000,000		82,000,000
Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 6,000,000
Tech & Innovation [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage			0.30%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 7,000,000
Tech & Innovation [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 5,000,000
Other commercial and industrial [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.40%		0.40%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 27,000,000		$ 27,000,000
Financing Receivable, Troubled Debt Restructured Loans, Number of Outstanding Contracts | SecurityLoan				4
Financing Receivable, Troubled Debt Restructuring				$ 2,000,000
Other commercial and industrial [Member] | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 27,000,000		$ 27,000,000
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructured Loans, Number of Outstanding Contracts | SecurityLoan				1
Financing Receivable, Troubled Debt Restructuring				$ 1,000,000
Hotel franchise finance [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.20%		0.70%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 9,000,000		$ 27,000,000
Financing Receivable, Troubled Debt Restructured Loans, Number of Outstanding Contracts | SecurityLoan				1
Financing Receivable, Troubled Debt Restructuring				$ 10,000,000
Hotel franchise finance [Member] | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 9,000,000		$ 27,000,000
Other Commercial Real Estate Non owner Occupied [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Troubled Debt Restructured Loans, Number of Outstanding Contracts | SecurityLoan				1
Financing Receivable, Troubled Debt Restructuring				$ 1,000,000
Residential Real Estate [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage			0%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 1,000,000
Residential Real Estate [Member] | Payment Deferral
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 1,000,000
Construction And Land Development Land [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.60%		0.60%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 28,000,000		$ 28,000,000
Construction And Land Development Land [Member] | Extended Maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	28,000,000		28,000,000
Residential - EBO
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 35,000,000		$ 92,000,000

Loans, Leases and Allowance f_6

Loans, Leases and Allowance for Credit Losses Loans, Leases and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	$ 47,362		$ 51,526
Financing Receivable, Individually Evaluated for Impairment	513		336
Loans and Leases Receivable, Net of Deferred Income	47,875		51,862
Loans collectively evaluated for impairment	306.7		299
Total loans individually evaluated for impairment	14.4		10.7
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	321.1	$ 304.7	309.7	$ 273.2	$ 257.6	$ 252.5
Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	377		302
Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	353		259
Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	24		43
Warehouse lending [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	5,549		5,561
Financing Receivable, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Net of Deferred Income	5,549		5,561
Loans collectively evaluated for impairment	5.2		8.4
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5.2	6.6	8.4	3.7	2.9	3
Municipal and nonprofit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	1,545		1,517
Financing Receivable, Individually Evaluated for Impairment	13		7
Loans and Leases Receivable, Net of Deferred Income	1,558		1,524
Loans collectively evaluated for impairment	14		13.4
Total loans individually evaluated for impairment	2.5		2.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16.5	18.4	15.9	13.6	13.4	13.7
Municipal and nonprofit [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13		7
Municipal and nonprofit [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Municipal and nonprofit [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	13		7
Tech & Innovation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	2,383		2,280
Financing Receivable, Individually Evaluated for Impairment	18		13
Loans and Leases Receivable, Net of Deferred Income	2,401		2,293
Loans collectively evaluated for impairment	30.1		30.3
Total loans individually evaluated for impairment	3.5		0.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	33.6	36.4	30.8	25.4	28	25.7
Tech & Innovation [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		6
Tech & Innovation [Member] | Real Estate Collateral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Tech & Innovation [Member] | Other Collateral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		6
Equity fund resources
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	931		3,717
Financing Receivable, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Net of Deferred Income	931		3,717
Loans collectively evaluated for impairment	1.7		6.4
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	1.7	3.3	6.4	14	6.6	9.6
Other commercial and industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	6,312		7,754
Financing Receivable, Individually Evaluated for Impairment	84		39
Loans and Leases Receivable, Net of Deferred Income	6,396		7,793
Loans collectively evaluated for impairment	46.3		80.4
Total loans individually evaluated for impairment	5.5		5.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	51.8	51.1	85.9	119.2	115.7	103.6
Other commercial and industrial [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11		30
Other commercial and industrial [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Other commercial and industrial [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11		30
Commercial Real Estate Owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	1,628		1,612
Financing Receivable, Individually Evaluated for Impairment	20		44
Loans and Leases Receivable, Net of Deferred Income	1,648		1,656
Loans collectively evaluated for impairment	8		7.1
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	8	8.6	7.1	7.5	8.1	10.6
Commercial Real Estate Owner Occupied [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18		42
Commercial Real Estate Owner Occupied [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18		42
Commercial Real Estate Owner Occupied [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Hotel franchise finance [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	3,884		3,607
Financing Receivable, Individually Evaluated for Impairment	217		200
Loans and Leases Receivable, Net of Deferred Income	4,101		3,807
Loans collectively evaluated for impairment	45.7		44.7
Total loans individually evaluated for impairment	0		2.2
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	45.7	47.7	46.9	33.8	30.6	41.5
Hotel franchise finance [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	174		186
Hotel franchise finance [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	174		186
Hotel franchise finance [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Other Commercial Real Estate Non owner Occupied [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	5,659		5,428
Financing Receivable, Individually Evaluated for Impairment	133		29
Loans and Leases Receivable, Net of Deferred Income	5,792		5,457
Loans collectively evaluated for impairment	87.2		47.4
Total loans individually evaluated for impairment	2.9		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	90.1	66.4	47.4	22.1	15.3	16.9
Other Commercial Real Estate Non owner Occupied [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	133		27
Other Commercial Real Estate Non owner Occupied [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	133		27
Other Commercial Real Estate Non owner Occupied [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Residential Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	13,502		13,996
Financing Receivable, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Net of Deferred Income	13,502		13,996
Loans collectively evaluated for impairment	33.9		30.4
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	33.9	31.7	30.4	18.8	23.8	12.5
Residential - EBO
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	1,432		1,884
Financing Receivable, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Net of Deferred Income	1,432		1,884
Loans collectively evaluated for impairment	0		0
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	0	0	0
Construction And Land Development [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	4,375		3,991
Financing Receivable, Individually Evaluated for Impairment	28		4
Loans and Leases Receivable, Net of Deferred Income	4,403		3,995
Loans collectively evaluated for impairment	31.7		27.4
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	31.7	31.5	27.4	12.2	10.7	12.5
Construction And Land Development [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	28		4
Construction And Land Development [Member] | Real Estate Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	28		4
Construction And Land Development [Member] | Other Collateral [Member] | Asset Pledged as Collateral
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	0		0
Other, loan segment
Loans and Leases Receivable Disclosure [Line Items]
Loans collectively evaluated for impairment	162		179
Financing Receivable, Individually Evaluated for Impairment	0		0
Loans and Leases Receivable, Net of Deferred Income	162		179
Loans collectively evaluated for impairment	2.9		3.1
Total loans individually evaluated for impairment	0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	$ 2.9	$ 3	$ 3.1	$ 2.9	$ 2.5	$ 2.9

Loans, Leases and Allowance f_7

Loans, Leases and Allowance for Credit Losses - Allowances for Credit Losses (Detail) Valuation - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	$ 23.8	$ 17	$ 24.8	$ 22.3
Financing Receivable, Collectively Evaluated for Impairment	47,362		47,362			$ 51,526
Financing Receivable, Individually Evaluated for Impairment	513		513			336
Loans and Leases Receivable, Net of Deferred Income	47,875		47,875			51,862
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	306.7		306.7			299
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	14.4		14.4			10.7
Off-Balance Sheet, Credit Loss, Liability	41.1	53.8	41.1	53.8	$ 44.8	47	$ 43.3	$ 37.6
Loans and Leases Receivable, Allowance	321		321			310
Interest Receivable	296		296			304
Off-Balance Sheet, Credit Loss, Liability, Change in Method, Credit Loss Expense (Reversal)	(3.7)	10.5	(5.9)	16.2
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	321.1	273.2	321.1	273.2	304.7	309.7	257.6	252.5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	8.2	2.4	17.4	5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0.8	1	4	3.4
Warehouse lending [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	1.4	(0.8)	3.2	(0.7)
Financing Receivable, Collectively Evaluated for Impairment	5,549		5,549			5,561
Financing Receivable, Individually Evaluated for Impairment	0		0			0
Loans and Leases Receivable, Net of Deferred Income	5,549		5,549			5,561
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	5.2		5.2			8.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	5.2	3.7	5.2	3.7	6.6	8.4	2.9	3
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Municipal and nonprofit [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	(1.9)	(0.2)	0.6	0.1
Financing Receivable, Collectively Evaluated for Impairment	1,545		1,545			1,517
Financing Receivable, Individually Evaluated for Impairment	13		13			7
Loans and Leases Receivable, Net of Deferred Income	1,558		1,558			1,524
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	14		14			13.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2.5		2.5			2.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	16.5	13.6	16.5	13.6	18.4	15.9	13.4	13.7
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Tech & Innovation [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	(2.8)	(2.6)	4.6	(2.3)
Financing Receivable, Collectively Evaluated for Impairment	2,383		2,383			2,280
Financing Receivable, Individually Evaluated for Impairment	18		18			13
Loans and Leases Receivable, Net of Deferred Income	2,401		2,401			2,293
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	30.1		30.1			30.3
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3.5		3.5			0.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	33.6	25.4	33.6	25.4	36.4	30.8	28	25.7
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	1.8	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	2
Equity fund resources
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	1.6	(7.4)	4.7	(4.4)
Financing Receivable, Collectively Evaluated for Impairment	931		931			3,717
Financing Receivable, Individually Evaluated for Impairment	0		0			0
Loans and Leases Receivable, Net of Deferred Income	931		931			3,717
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	1.7		1.7			6.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	1.7	14	1.7	14	3.3	6.4	6.6	9.6
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Other commercial and industrial [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	(5.9)	5.1	24.8	19.4
Financing Receivable, Collectively Evaluated for Impairment	6,312		6,312			7,754
Financing Receivable, Individually Evaluated for Impairment	84		84			39
Loans and Leases Receivable, Net of Deferred Income	6,396		6,396			7,793
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	46.3		46.3			80.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5.5		5.5			5.5
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	51.8	119.2	51.8	119.2	51.1	85.9	115.7	103.6
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	6	2.3	13.3	4.9
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0.8	0.7	4	1.1
Commercial Real Estate Owner Occupied [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	(0.6)	0.7	0.9	3.2
Financing Receivable, Collectively Evaluated for Impairment	1,628		1,628			1,612
Financing Receivable, Individually Evaluated for Impairment	20		20			44
Loans and Leases Receivable, Net of Deferred Income	1,648		1,648			1,656
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	8		8			7.1
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	8	7.5	8	7.5	8.6	7.1	8.1	10.6
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0.1	0	0.1
Hotel franchise finance [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	(2)	(3.2)	(1.2)	7.7
Financing Receivable, Collectively Evaluated for Impairment	3,884		3,884			3,607
Financing Receivable, Individually Evaluated for Impairment	217		217			200
Loans and Leases Receivable, Net of Deferred Income	4,101		4,101			3,807
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	45.7		45.7			44.7
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			2.2
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	45.7	33.8	45.7	33.8	47.7	46.9	30.6	41.5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Other Commercial Real Estate Non owner Occupied [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	25.9	(6.8)	44.9	(5.2)
Financing Receivable, Collectively Evaluated for Impairment	5,659		5,659			5,428
Financing Receivable, Individually Evaluated for Impairment	133		133			29
Loans and Leases Receivable, Net of Deferred Income	5,792		5,792			5,457
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	87.2		87.2			47.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2.9		2.9			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	90.1	22.1	90.1	22.1	66.4	47.4	15.3	16.9
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	2.2	0	2.2	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Residential Real Estate [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	2.2	(5)	3.5	6.3
Financing Receivable, Collectively Evaluated for Impairment	13,502		13,502			13,996
Financing Receivable, Individually Evaluated for Impairment	0		0			0
Loans and Leases Receivable, Net of Deferred Income	13,502		13,502			13,996
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	33.9		33.9			30.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	33.9	18.8	33.9	18.8	31.7	30.4	23.8	12.5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Residential - EBO
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	0		0
Financing Receivable, Collectively Evaluated for Impairment	1,432		1,432			1,884
Financing Receivable, Individually Evaluated for Impairment	0		0			0
Loans and Leases Receivable, Net of Deferred Income	1,432		1,432			1,884
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Interest Receivable	(6)		(6)			9
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	0		0		0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0		0
Construction And Land Development [Member]
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	0.2	(1.5)	4.3	0.3
Financing Receivable, Collectively Evaluated for Impairment	4,375		4,375			3,991
Financing Receivable, Individually Evaluated for Impairment	28		28			4
Loans and Leases Receivable, Net of Deferred Income	4,403		4,403			3,995
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	31.7		31.7			27.4
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	31.7	12.2	31.7	12.2	31.5	27.4	10.7	12.5
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Other, loan segment
Valuation Allowance [Line Items]
Provision for Loan and Lease Losses	0.1	(0.3)	0.1	0.1
Financing Receivable, Collectively Evaluated for Impairment	162		162			179
Financing Receivable, Individually Evaluated for Impairment	0		0			0
Loans and Leases Receivable, Net of Deferred Income	162		162			179
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2.9		2.9			3.1
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0			0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	2.9	2.9	2.9	2.9	$ 3	$ 3.1	$ 2.5	$ 2.9
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	0.1	0.1	0.1
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	$ 0	$ 0.2	$ 0	$ 0.2

Loans, Leases and Allowance f_8

Loans, Leases and Allowance for Credit Losses Loans, Leases and Allowance for Credit Losses - Loan Purchases and Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Sale			$ 1,100
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 64		$ 90
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.10%		0.20%
Payment Deferral and Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 2
Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 64		82
Payment Deferral
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			6
Financing Receivable, Purchase
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Purchase	$ 511	$ 3,100	1,000	$ 5,500
Tech & Innovation [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Modified in Period, to Total Financing Receivables, Percentage	0%
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 7
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage			0.30%
Tech & Innovation [Member] | Payment Deferral and Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 2
Tech & Innovation [Member] | Payment Deferral
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			5
Other commercial and industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 27		$ 27
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.40%		0.40%
Other commercial and industrial [Member] | Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 27		$ 27
Residential Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 1
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage			0%
Residential Real Estate [Member] | Payment Deferral
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount			$ 1
Hotel franchise finance [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 9		$ 27
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.20%		0.70%
Hotel franchise finance [Member] | Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 9		$ 27
Construction And Land Development Land [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 28		$ 28
Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage	0.60%		0.60%
Construction And Land Development Land [Member] | Extended Maturity
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount	$ 28		$ 28

MSR Portfolio (Details)

MSR Portfolio (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Amount	$ 1,007	$ 826	$ 1,007	$ 826	$ 910	$ 1,148	$ 950	$ 698
Servicing Asset at Fair Value, Additions	245	194	387.2	397.5
Servicing Asset at Fair Value, Disposals	(149)	(350)	(499)	(350)
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions	24	62	16	143
Servicing Asset at Fair Value, Other Changes that Affect Balance	1	0	4	0
Servicing Asset at Fair Value, Other Changes in Fair Value	(24)	(30)	(49)	(63)
MSR UPB of underlying loans	8,800	24,100	28,300	24,100
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding	59,705	52,184	59,705	52,184
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	54	48.9	116.9	91.8
MSR Loan Sales, Receivable	74		74			$ 39
Mortgage servicing asset
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Other Changes in Fair Value	0
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	0
Servicing Contracts
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Disposals	$ (150)	$ (350)	$ (501)	$ (350)

UPB in MSR Portfolio (Details)

UPB in MSR Portfolio (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Servicing Assets at Fair Value [Line Items]
Continuing Involvement with Transferred Financial Assets, Principal Amount Outstanding	$ 59,705		$ 52,184
Servicing advances, net	$ (77)	$ (102)

Hypothetical Change in FV (Deta

Hypothetical Change in FV (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Amount	$ 1,007	$ 910	$ 1,148	$ 826	$ 950	$ 698
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 basis point Adverse Interest Rate Change	(57)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 basis point Favorable Interest Rate Change	53
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 basis point Discount Rate Increase	(19)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 50 basis point Discount Rate Decrease	20
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 1 Percent Adverse Change in Prepayment Speed	(26)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 1 Percent Adverse Change in Prepayment Speed	28
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Increase Cost of Service	(12)
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Decrease Cost of Service	$ 12

Net Loan Servicing Revenue (Det

Net Loan Servicing Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Servicing Assets at Fair Value [Line Items]
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	$ 54	$ 48.9	$ 116.9	$ 91.8
Servicing Asset at Fair Value, Other Changes in Fair Value	(24)	(30)	(49)	(63)
Unrealized Gain (Loss) on Derivatives	(37.2)	49.8	(15)	(31.4)
Expense Related to Distribution or Servicing and Underwriting Fees	18.4	$ 14.7	32.2	$ 25.5
Servicing advances, net	77		$ 77		$ 102
Mortgage servicing asset
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Fair Value, Additions	0
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset	0
Servicing Asset at Fair Value, Other Changes in Fair Value	0
Cash Flows Between Transferor and Transferee, Servicing Fees	0
Gain (Loss) on Disposition of Assets for Financial Service Operations	0
Unrealized Gain (Loss) on Derivatives	0
Derivative Instruments Not Designated as Hedging Instruments, Loss	0
Expense Related to Distribution or Servicing and Underwriting Fees	0
Contractually Specified Servicing Fees, Amount	$ 0

Other Borrowings - Additional I

Other Borrowings - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Debt [Line Items]
FHLB advances	$ 4,900	$ 4,300
Warehouse Agreement Borrowings	55	0
Other Short-term Borrowings	62	25
Short-term Debt	8,799	4,992
Senior Notes	314	315
Notes Payable	454	992
Long-term Debt	768	1,307
Other borrowings	9,567	6,299
Customer repurchase agreements	2,482	27
Federal Funds Purchased	0	640
BTFP advances
Debt [Line Items]
Other Short-term Borrowings	1,300	0
Securities Repurchase Agreements
Debt [Line Items]
Customer repurchase agreements	1,400	0
Customer Repurchase Agreements
Debt [Line Items]
Customer repurchase agreements	5	27
Early Buyout Repurchase Agreements
Debt [Line Items]
Customer repurchase agreements	$ 1,100	$ 0
ATM Offering
Debt [Line Items]
Shares Issued, Price Per Share			$ 86.78
Grant year 2020 | Performance Shares [Member]
Debt [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number	157,784
Grant year 2019 | Performance Shares [Member]
Debt [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number		203,646
Senior Notes
Debt [Line Items]
Debt Instrument, Face Amount	$ 300
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Credit Linked Notes Maturing July 2059
Debt [Line Items]
Debt Instrument, Face Amount	$ 197	$ 202
Debt Issuance Costs, Net	3	3
Credit Linked Notes Maturing April 2052
Debt [Line Items]
Debt Instrument, Face Amount	184	189
Debt Issuance Costs, Net	3	3
Credit Linked Notes Maturing June 2028
Debt [Line Items]
Debt Instrument, Face Amount		300
Debt Issuance Costs, Net		4
Credit Linked Notes Maturing December 2024
Debt [Line Items]
Debt Instrument, Face Amount		242
Debt Issuance Costs, Net		2
Credit Linked Notes Maturing October 2052
Debt [Line Items]
Debt Instrument, Face Amount	92	95
Debt Issuance Costs, Net	2	2
Federal Home Loan Bank Advances [Member]
Debt [Line Items]
Additional available credit with the entity	6,200	6,800
FRB [Member]
Debt [Line Items]
Additional available credit with the entity	16,000	$ 5,200
Federal Reserve Bank BTFP Advances
Debt [Line Items]
Additional available credit with the entity	34
Warehouse Agreement Borrowings
Debt [Line Items]
Additional available credit with the entity	2,800
Revolving Credit Facility
Debt [Line Items]
Secured borrowing credit line	$ 175

Qualifying Debt (Details)

Qualifying Debt (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) Trust $ / shares	Jun. 30, 2022 $ / shares	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Common Stock, Dividends, Per Share, Cash Paid | $ / shares	$ 0.36	$ 0.35
Number of Statutory Business Trusts Formed or Acquired | Trust	8
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust	$ 71		$ 76
Subordinated Long-term Debt, Noncurrent	817		817
Subordinated Debt [Member] | Subordinated Debentures Maturing June 2030 [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 225		$ 225
Debt Instrument, Interest Rate, Stated Percentage	5.25%		5.25%
Debt Issuance Costs, Net	$ 1		$ 1
Subordinated Debt [Member] | Subordinated Debentures Maturing June 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 600		$ 600
Debt Instrument, Interest Rate, Stated Percentage	3%		3%
Debt Issuance Costs, Net	$ 7		$ 7
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	7.88%		7.11%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, Common Stock, Cash		$ 39.4	$ 37.9	$ 78.8	$ 75.2
Common Stock, Dividends, Per Share, Cash Paid				$ 0.36	$ 0.35
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		7,815	2,635	151,219	188,169
Treasury Stock Acquired, Average Cost Per Share		$ 31.96	$ 77.50	$ 72.49	$ 93.29
Stock Issued During Period, Shares, New Issues					1,300,000
Stock Issued During Period, Value, New Issues					$ 107.7
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					0.7
Proceeds from Issuance of Common Stock				$ 0	$ 107.7
Preferred Stock, Dividends, Per Share, Cash Paid		$ 0.27	0.27
Preferred Stock, Shares Outstanding		12,000,000		12,000,000		12,000,000
ATM Offering
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued, Price Per Share			$ 86.78		$ 86.78
Stock Issued During Period, Value, New Issues					$ 108.4
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense		$ 1.4	$ 3.4	$ 1.1	6.2
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture		0.7		45.2
Share-based Payment Arrangement, Expense		9.1	7.6	17.6	14.7
Retained Earnings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends, Common Stock, Cash		$ 39.4	$ 37.9	$ 78.8	$ 75.2
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury Stock, Shares, Acquired	[1]	0	0	100,000	200,000
Stock Issued During Period, Shares, New Issues					1,300,000
Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Shares Outstanding		12,000,000		12,000,000
[1] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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.

Stockholders' Equity Common Sto

Stockholders' Equity Common Stock Repurchase (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs		$ 0.7
Common Stock, Dividends, Per Share, Cash Paid	$ 0.36	$ 0.35

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (591,500)	$ (235,100)	$ (661,000)	$ (15,700)
Other comprehensive income before reclassifications	29,200	282,500	(31,000)	528,200
Amounts reclassified from accumulated other comprehensive income	(10,200)	300	(19,500)	5,400
Net other comprehensive (loss) income	19,000	282,800	(50,500)	533,600
Ending balance	(610,500)	(517,900)	(610,500)	(517,900)
Unrealized holding gains (losses) on AFS
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(594,300)	(236,300)	(663,700)	(16,700)
Other comprehensive income before reclassifications	34,200	284,500	(25,900)	532,400
Amounts reclassified from accumulated other comprehensive income	(10,200)	300	(19,500)	5,400
Net other comprehensive (loss) income	24,000	284,800	(45,400)	537,800
Ending balance	(618,300)	(521,100)	(618,300)	(521,100)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1,900	1,500	3,000	(700)
Other comprehensive income before reclassifications	5,000	(2,000)	(3,900)	4,200
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive (loss) income	5,000	(2,000)	(3,900)	4,200
Ending balance	6,900	3,500	6,900	3,500
Impairment loss on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	1,200	0	0	0
Other comprehensive income before reclassifications	0	0	(1,200)	0
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive (loss) income	0	0	(1,200)	0
Ending balance	1,200	0	1,200	0
Supplemental Employee Retirement Plan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	300	(300)	300	(300)
Other comprehensive income before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Net other comprehensive (loss) income	0	0	0	0
Ending balance	$ 300	$ (300)	$ 300	$ (300)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income	$ (3.4)	$ (0.1)	$ (6.6)	$ 1.9
Amount reclassified from accumulated other comprehensive income	$ (10.2)	$ 0.3	$ (19.5)	$ 5.4

Derivatives and Hedging Fair Va

Derivatives and Hedging Fair Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	$ 182	$ 36	$ 60
Derivative Liability, Fair Value	(34)	(21)	(79)
Derivative Asset, Not Subject to Master Netting Arrangement	7	15	19
Derivative Liability, Not Subject to Master Netting Arrangement	(19)	(19)	(4)
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	161	34	24
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	189	51	79
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(12)	1	24
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	28	17	55
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	25	23	28
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	53	40	83
Derivative Asset, Collateral, Obligation to Return Cash, Offset	85	(4)	9
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(28)	(17)	(55)
Derivative Asset, Subject to Master Netting Arrangement, after Offset	154	19	5
Derivative Liability, Subject to Master Netting Arrangement, after Offset	6	4	24
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	70	18	5
Derivative Liability, Fair Value	(4)	0	(11)
Derivative Asset, Not Subject to Master Netting Arrangement	0	6	0
Derivative Liability, Not Subject to Master Netting Arrangement	(14)	(6)	0
Derivative Netting Adjustments, Liabilities	0	0	0
Derivative Netting Adjustments, Assets	0	0	0
Derivative Asset, Subject to Master Netting Arrangement, after Offset	70	18	5
Derivative Liability, Subject to Master Netting Arrangement, after Offset	4	0	11
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Not Subject to Master Netting Arrangement	1	1	1
Derivative Liability, Not Subject to Master Netting Arrangement	(1)	(9)	0
Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Derivative Asset, Not Subject to Master Netting Arrangement	6	5	15
Derivative Liability, Not Subject to Master Netting Arrangement	(4)	(3)	(3)
Forward purchase contracts
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	1	1	31
Derivative Liability, Fair Value	(16)	(12)	(10)
Derivative Asset, Not Subject to Master Netting Arrangement	0	0	1
Derivative Liability, Not Subject to Master Netting Arrangement	0	(1)	0
Derivative Netting Adjustments, Liabilities	0	0	0
Derivative Netting Adjustments, Assets	0	0	0
Derivative Asset, Subject to Master Netting Arrangement, after Offset	1	1	31
Derivative Liability, Subject to Master Netting Arrangement, after Offset	16	12	10
Forward sales contracts
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	26	13	33
Derivative Liability, Fair Value	(2)	(8)	(34)
Derivative Asset, Not Subject to Master Netting Arrangement	0	3	2
Derivative Liability, Not Subject to Master Netting Arrangement	0	0	(1)
Derivative Netting Adjustments, Liabilities	0	0	0
Derivative Netting Adjustments, Assets	0	0	0
Derivative Asset, Subject to Master Netting Arrangement, after Offset	26	13	33
Derivative Liability, Subject to Master Netting Arrangement, after Offset	2	8	34
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	29,043	19,695	24,178
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	37	39	48
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	48	29	83
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,424	1,538	64
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	14	6	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	14	6	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	71	250	138
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	1	9	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	1	1	1
Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,331	1,459	2,819
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	4	3	3
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	6	5	15
Not Designated as Hedging Instrument [Member] | Forward purchase contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,484	2,709	4,764
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	16	13	10
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	1	1	32
Not Designated as Hedging Instrument [Member] | Forward sales contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	7,279	4,985	9,621
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	2	8	35
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	26	16	35
Not Designated as Hedging Instrument [Member] | Futures purchase contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	200	0	700
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	0	0	0
Not Designated as Hedging Instrument [Member] | Futures sales contracts
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	12,210	8,706	6,072
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	0	0	0
Not Designated as Hedging Instrument [Member] | Risk participation agreements
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	44	48	0
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	0	0	0
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	0	0	0
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value	56	18	5
Derivative Liability, Fair Value	(4)	0	(11)
Derivative, Notional Amount	4,033	476	500
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,033	476	500
Derivative Instruments in Hedges, Assets, at Fair Value	56	18	5
Fair Value Hedge Liabilities	$ 4	$ 0	$ 11

Derivatives and Hedging Pre-Tax

Derivatives and Hedging Pre-Tax Net Gains (Losses) on Fair Value Hedges (Detail) - Interest Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	$ 39	$ 15.2	$ 34.7	$ 48.7
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ (39)	$ (15.2)	$ (34.7)	$ (48.7)

Derivatives and Hedging Additio

Derivatives and Hedging Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative [Line Items]
Hedged Asset, Fair Value Hedge		$ 3,934		$ 3,934		$ 447
Fair Value Hedge Assets, Loans	[1]	52		52		17
Derivative Liability, Fair Value		34	$ 79	34	$ 79	21
Derivative, Gain (Loss) on Derivative, Net		42.1	118.1	17.5	334.9
Net gain on loan origination and sale activities
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		42.1	118.1	17.6	334.9
Loan servicing fees, net
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(31)	(29.9)	(17.6)	(86.8)
Interest Rate Lock Commitments | Net gain on loan origination and sale activities
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(11.1)	23.2	0.3	2.4
Forward Contracts | Net gain on loan origination and sale activities
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		55.6	101	18.8	342.3
Forward Contracts | Loan servicing fees, net
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(13.2)	(8)	(14.7)	(42.9)
Future | Loan servicing fees, net
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		18.7	(21.9)	14.7	(43.9)
Other Contract | Net gain on loan origination and sale activities
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		2.2	(6.1)	1.8	(9.8)
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative Liability, Fair Value		4	11	4	11	0
Interest Rate Swap [Member] | Net gain on loan origination and sale activities
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(4.6)	0	(3.3)	0
Interest Rate Swap [Member] | Loan servicing fees, net
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net		(36.5)	0	(17.6)	0
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Liability, Fair Value		$ 4	$ 11	$ 4	$ 11	$ 0
[1]Included in the carrying value of the hedged assets/(liabilities). (2) As of June 30, 2023, included portfolio layer method derivative instruments with $3.5 billion designated as the hedged amount (from a closed portfolio of prepayable fixed rate loans with a carrying value of $6.8 billion). The cumulative basis adjustment included in the carrying value of these hedged items totaled $29 million.

Earnings per Share (Details)

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Basic	108,300	107,300	108,200	106,700
Weighted Average Number Diluted Shares Outstanding Adjustment	0	400	100	400
Diluted	108,300	107,700	108,300	107,100
Net income available to common shareholders	$ 212,500	$ 257,000	$ 351,500	$ 493,900
Earnings (loss) per share - basic	$ 1.96	$ 2.40	$ 3.25	$ 4.63
Earnings (loss) per share - diluted	$ 1.96	$ 2.39	$ 3.24	$ 4.61
Restricted Stock [Member]
Earnings Per Share [Abstract]
Anti-dilutive stock options outstanding that were not included in computation of diluted earnings per common share	400		200
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock options outstanding that were not included in computation of diluted earnings per common share	400		200

Income Taxes Additional Informa

Income Taxes Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate Reconciliation, Percent	17.10%	19.60%	19.50%	19.50%
Deferred Income Tax Assets, Net	$ 315,000		$ 315,000		$ 311,000
Investments in LIHTC and renewable energy	596,000		596,000		624,000
Investment-related Liabilities	338,000		338,000		398,000
Amortization of tax credit investments	27,700	$ 15,400	39,000	$ 28,800
Deferred Tax Assets, Valuation Allowance	$ 0		$ 0		$ 0

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Letters of credit expiration period	1 year
Off-Balance Sheet, Credit Loss, Liability	$ 41.1	$ 47	$ 44.8	$ 53.8	$ 43.3	$ 37.6
Commercial Real Estate Portfolio Segment [Member] | Loans Receivable [Member] | Credit Concentration Risk [Member]
Loss Contingencies [Line Items]
Percent of commercial real estate related loans	21%	18%
Commercial and Industrial Sector [Member] | Loans Receivable [Member] | Credit Concentration Risk [Member]
Loss Contingencies [Line Items]
Percent of commercial real estate related loans	35%	40%
Unfunded Loan Commitment [Member]
Loss Contingencies [Line Items]
Loss Contingency Accrual	$ 41	$ 47

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Contractual Amounts for Unfunded Commitments and Letters of Credit (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Other Commitments [Line Items]
Total amount	$ 15,964	$ 19,318
Commitments to extend credit [Member]
Other Commitments [Line Items]
Unsecured Loan Commitments	1,168	1,209
Total amount	15,319	18,674
Credit card guarantees [Member]
Other Commitments [Line Items]
Total amount	405	379
Standby letters of credit [Member]
Other Commitments [Line Items]
Total amount	240	265
Unsecured Letters Of Credit	$ 6	$ 7
Commercial Real Estate Portfolio Segment [Member] | Credit Concentration Risk [Member] | Loans Receivable [Member]
Other Commitments [Line Items]
Concentration Risk, Percentage	21%	18%
Construction And Land Development Land [Member] | Credit Concentration Risk [Member] | Loans Receivable [Member]
Other Commitments [Line Items]
Concentration Risk, Percentage	9%	8%

Commitments and Contingencies L

Commitments and Contingencies Lease Commitments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Lease, Cost	$ 7.1	$ 6.2	$ 14.5	$ 12.1
Lessee, operating lease, other cost	1.2	1	2.5	2.1
Other Commitments [Line Items]
Lease, Cost	7.1	6.2	14.5	12.1
Lessee, operating lease, other cost	$ 1.2	$ 1	$ 2.5	$ 2.1

Fair Value Accounting - Gains a

Fair Value Accounting - Gains and Losses from Fair Value Changes Included in Consolidated Statement of Operations (Detail) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2023 USD ($)		Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)		Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Subordinated Debt Obligations, Fair Value Disclosure		$ 57	[1]		$ 57	[1]		$ 63
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax		$ (5)		$ 2	$ 3.9		$ 4.2
Junior Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input		0.1013			0.1013			0.0813
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		$ 6.7		2.7	$ 5.2		5.6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	[2]	$ 6.7		$ (2.7)	$ 5.2		$ (5.6)
Period of basis point spread					4.58%		3.36%
Percentage of LIBOR					5.55%		4.77%
[1] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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 Accounting - Fair Va

Fair Value Accounting - Fair Value of Assets and Liabilities (Detail) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2023 USD ($) percent		Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) percent		Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) percent		Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		$ 139	[1]		$ 139	[1]			$ 160	[2]
Subordinated Debt Obligations, Fair Value Disclosure		57	[3]		57	[3]			63
Servicing Asset at Fair Value, Amount		$ 1,007		$ 826	$ 1,007		$ 826	$ 910	$ 1,148		$ 950	$ 698
Minimum | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		0.200			0.200				0.200
Minimum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		0.091			0.091				0.085
Maximum | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		0.200			0.200				0.200
Maximum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		0.209			0.209				0.185
Weighted Average | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		20			20				0.200
Weighted Average | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent		15.3			15.3				13.4
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		$ 139			$ 139				$ 160
Derivative Liability		41	[4]		41	[4]			39
Largest gross exposure (positive derivative NPV) to an individual counterparty		104	[4]		104	[4]			47
Loans Held-for-sale, Fair Value Disclosure		1,340			1,340				1,173
Servicing Asset at Fair Value, Amount		1,007			1,007				1,148
Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		122			122				135
Subordinated Debt Obligations, Fair Value Disclosure		0	[3]		0	[3]			0
Derivative Liability		0	[4]		0	[4]			0
Largest gross exposure (positive derivative NPV) to an individual counterparty		0	[4]		0	[4]			0
Loans Held-for-sale, Fair Value Disclosure		0			0				0
Servicing Asset at Fair Value, Amount		0			0				0
Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		17			17				25
Subordinated Debt Obligations, Fair Value Disclosure		0	[3]		0	[3]			0
Derivative Liability		37	[4]		37	[4]			36
Largest gross exposure (positive derivative NPV) to an individual counterparty		98	[4]		98	[4]			42
Loans Held-for-sale, Fair Value Disclosure		1,337			1,337				1,172
Servicing Asset at Fair Value, Amount		0			0				0
Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		0			0				0
Subordinated Debt Obligations, Fair Value Disclosure		57	[3]		57	[3]			63
Derivative Liability		4	[4]		4	[4]			3
Largest gross exposure (positive derivative NPV) to an individual counterparty		6	[4]		6	[4]			5
Loans Held-for-sale, Fair Value Disclosure		3			3				1
Servicing Asset at Fair Value, Amount		1,007			1,007				1,148
Reported Value Measurement [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		139			139				160
Derivative Liability		41			41				40
Largest gross exposure (positive derivative NPV) to an individual counterparty		104			104				51
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		139			139				160
Derivative Liability		41			41				39
Largest gross exposure (positive derivative NPV) to an individual counterparty		104			104				47
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		122			122				135
Derivative Liability		0			0				0
Largest gross exposure (positive derivative NPV) to an individual counterparty		0			0				0
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		17			17				25
Derivative Liability		37			37				36
Largest gross exposure (positive derivative NPV) to an individual counterparty		98			98				42
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity		0			0				0
Derivative Liability		4			4				3
Largest gross exposure (positive derivative NPV) to an individual counterparty		6			6				5
Junior Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)		6.7		2.7	5.2		5.6
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	[5]	6.7		$ (2.7)	5.2		$ (5.6)
Junior Subordinated Debt [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Subordinated Debt Obligations, Fair Value Disclosure		$ 57			$ 57				$ 63
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.[3] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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 Accounting - Change

Fair Value Accounting - Change in Level 3 Liabilities Measured at Fair Value on Recurring Basis (Detail) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2023 USD ($)		Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)		Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, after Tax		$ (5)		$ 2	$ 3.9		$ 4.2
Junior subordinated debt		57	[1]		57	[1]			$ 63
Servicing Asset at Fair Value, Other Changes that Affect Balance		1		0	4		0
Interest Rate Lock Commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		2		12	2		12	$ 14	2	$ (11)	$ 9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		4,210		5,575	7,156		10,898
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances		(4,219)		(5,543)	(7,154)		(10,864)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)		2		12	2		12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		(3)		(9)	(2)		(31)
Servicing Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,007		826	1,007		826	$ 910	1,148	$ 950	$ 698
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		245		194	387		398
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(149)		(350)	(499)		(350)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)		31		40	31		89
Realization of expected cash flows		(24)		(30)	(49)		(63)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings		24		62	16		143
Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Junior subordinated debt		57	[1]		57	[1]			$ 63
Junior Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	[2]	$ (6.7)		2.7	$ (5.2)		5.6
Debt Instrument, Measurement Input		0.1013			0.1013				0.0813
Junior Subordinated Debt [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Junior subordinated debt		$ 57			$ 57				$ 63
Junior Subordinated Debt [Member] | Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning balance		64		64.5	62.5		67.4
Closing balance		$ 57.3		$ 61.8	$ 57.3		$ 61.8
[1] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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 Accounting - Assets

Fair Value Accounting - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded	$ 9	$ 7
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure	11	11
Collateral Dependent Loans, Net of Allowance	368	295
Fair Value, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure	0	0
Collateral Dependent Loans, Net of Allowance	0	0
Fair Value, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure	0	0
Collateral Dependent Loans, Net of Allowance	0	0
Fair Value, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure	11	11
Collateral Dependent Loans, Net of Allowance	$ 368	$ 295
Third Party Appraisal [Member] | Loans and Finance Receivables [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs	Costs to sell	Costs to sell
Third Party Appraisal [Member] | Other Assets [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs	Costs to sell	Costs to sell
Discount Rate [Member] | Loans and Finance Receivables [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs	Contractual loan rate	Contractual loan rate
Scheduled Cash Collections [Member] | Loans and Finance Receivables [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs	Probability of default	Probability of default
Proceeds from Non-Real Estate Collateral [Member] | Loans and Finance Receivables [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs	Loss given default	Loss given default

Fair Value Accounting - Chang_2

Fair Value Accounting - Change in Level 3 Unobservable Inputs (Detail) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($) percent	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) percent	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) percent	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Interest Rate Lock Commitments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $	$ 2	$ 12	$ 2	$ 12	$ 2	$ 14	$ (11)	$ 9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | $	4,210	5,575	7,156	10,898
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances | $	(4,219)	(5,543)	(7,154)	(10,864)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) | $	2	12	2	12
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | $	(3)	(9)	(2)	(31)
Servicing Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value | $	1,007	826	1,007	826	$ 1,148	$ 910	$ 950	$ 698
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases | $	245	194	387	398
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales | $	(149)	(350)	(499)	(350)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss) | $	31	40	31	89
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings | $	24	62	16	143
Realization of expected cash flows | $	$ (24)	$ (30)	$ (49)	$ (63)
Loans and Finance Receivables [Member] | Level 3 [Member] | Scheduled Cash Collections [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs			Probability of default		Probability of default
Loans and Finance Receivables [Member] | Level 3 [Member] | Proceeds from Non-Real Estate Collateral [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Level 3 Fair Value Measurement Inputs			Loss given default		Loss given default
Option Adjusted Spread | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	307		307		621
Option Adjusted Spread | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	237		237		378
Option Adjusted Spread | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	48		48		190
Conditional Prepayment Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	0.209		0.209		0.185
Conditional Prepayment Rate | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	15.3		15.3		13.4
Conditional Prepayment Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	0.091		0.091		0.085
Servicing Fee Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	56.5		56.5		56.5
Servicing Fee Rate | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	34.6		34.6		33.2
Servicing Fee Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	25		25		25
Cost to Service | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	100		100		94
Cost to Service | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	94		94		90
Cost to Service | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	93		93		87
Servicing Fee Multiple | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	5.3		5.3		5.5
Servicing Fee Multiple | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	4.3		4.3		4.3
Servicing Fee Multiple | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	3.3		3.3		2.9
Pull-through Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	1		1		1
Pull-through Rate | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	89		89		89
Pull-through Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input	0.71		0.71		0.69
Recapture Rate | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	0.200		0.200		0.200
Recapture Rate | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	20		20		0.200
Recapture Rate | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input	0.200		0.200		0.200

Fair Value Accounting - Estimat

Fair Value Accounting - Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Repossessed Assets	$ 11		$ 11
Financial assets
Debt Securities, Held-to-maturity	1,367		1,289
Debt Securities, Available-for-sale	8,631	[1]	7,092	[2]
Investment securities - equity	139	[1]	160	[2]
Loans, net	47,554		51,552
Loans Receivable Held-for-sale, Amount	3,156		1,184
Servicing Asset	1,007		1,148
Accrued Investment Income Receivable	4		4
Financial liabilities
Deposits	51,041		53,644
Other borrowings	9,567		6,299
Junior subordinated debt	57	[3]	63
Fair Value, Nonrecurring [Member]
Financial liabilities
Other assets acquired through foreclosure	11		11
Fair Value, Nonrecurring [Member] | Level 1 [Member]
Financial liabilities
Other assets acquired through foreclosure	0		0
Fair Value, Nonrecurring [Member] | Level 2 [Member]
Financial liabilities
Other assets acquired through foreclosure	0		0
Fair Value, Nonrecurring [Member] | Level 3 [Member]
Financial liabilities
Other assets acquired through foreclosure	11		11
Fair Value, Nonrecurring [Member] | Reported Value Measurement [Member]
Financial assets
Debt Securities, Held-to-maturity	1,367		1,289
Loans, net	47,554		51,552
Accrued Investment Income Receivable	348		357
Financial liabilities
Deposits	51,041		53,644
Other borrowings	9,567		6,299
Junior subordinated debt	888		893
Interest Payable, Current	104		35
Fair Value, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member]
Financial assets
Debt Securities, Held-to-maturity	1,186		1,112
Loans, net	44,772		47,679
Accrued Investment Income Receivable	348		357
Financial liabilities
Deposits	51,040		53,698
Other borrowings	9,490		6,261
Junior subordinated debt	689		810
Interest Payable, Current	104		35
Fair Value, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member] | Level 1 [Member]
Financial assets
Debt Securities, Held-to-maturity	0		0
Loans, net	0		0
Accrued Investment Income Receivable	0		0
Financial liabilities
Deposits	0		0
Other borrowings	0		0
Junior subordinated debt	0		0
Interest Payable, Current	0		0
Fair Value, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member] | Level 2 [Member]
Financial assets
Debt Securities, Held-to-maturity	1,186		1,112
Loans, net	0		0
Accrued Investment Income Receivable	348		357
Financial liabilities
Deposits	51,040		53,698
Other borrowings	9,490		6,261
Junior subordinated debt	620		735
Interest Payable, Current	104		35
Fair Value, Nonrecurring [Member] | Estimate of Fair Value Measurement [Member] | Level 3 [Member]
Financial assets
Debt Securities, Held-to-maturity	0		0
Loans, net	44,772		47,679
Accrued Investment Income Receivable	0		0
Financial liabilities
Deposits	0		0
Other borrowings	0		0
Junior subordinated debt	69		75
Interest Payable, Current	0		0
Fair Value, Recurring [Member]
Financial assets
Debt Securities, Available-for-sale	8,631		7,092
Investment securities - equity	139		160
Derivative Asset	104	[4]	47
Financial liabilities
Derivative Liability	41	[4]	39
Fair Value, Recurring [Member] | Level 1 [Member]
Financial assets
Debt Securities, Available-for-sale	2,313		24
Investment securities - equity	122		135
Derivative Asset	0	[4]	0
Financial liabilities
Junior subordinated debt	0	[3]	0
Derivative Liability	0	[4]	0
Fair Value, Recurring [Member] | Level 2 [Member]
Financial assets
Debt Securities, Available-for-sale	6,318		7,068
Investment securities - equity	17		25
Derivative Asset	98	[4]	42
Financial liabilities
Junior subordinated debt	0	[3]	0
Derivative Liability	37	[4]	36
Fair Value, Recurring [Member] | Level 3 [Member]
Financial assets
Debt Securities, Available-for-sale	0		0
Investment securities - equity	0		0
Derivative Asset	6	[4]	5
Financial liabilities
Junior subordinated debt	57	[3]	63
Derivative Liability	4	[4]	3
Fair Value, Recurring [Member] | Reported Value Measurement [Member]
Financial assets
Debt Securities, Available-for-sale	8,631		7,092
Investment securities - equity	139		160
Derivative Asset	104		51
Loans Receivable Held-for-sale, Amount	3,156		1,184
Servicing Asset	1,007		1,148
Financial liabilities
Derivative Liability	41		40
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member]
Financial assets
Debt Securities, Available-for-sale	8,631		7,092
Investment securities - equity	139		160
Derivative Asset	104		47
Loans Receivable Held-for-sale, Amount	3,156		1,173
Servicing Asset	1,007		1,148
Financial liabilities
Derivative Liability	41		39
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Level 1 [Member]
Financial assets
Debt Securities, Available-for-sale	2,313		24
Investment securities - equity	122		135
Derivative Asset	0		0
Loans Receivable Held-for-sale, Amount	0		0
Servicing Asset	0		0
Financial liabilities
Derivative Liability	0		0
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Level 2 [Member]
Financial assets
Debt Securities, Available-for-sale	6,318		7,068
Investment securities - equity	17		25
Derivative Asset	98		42
Loans Receivable Held-for-sale, Amount	3,136		1,172
Servicing Asset	0		0
Financial liabilities
Derivative Liability	37		36
Fair Value, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Level 3 [Member]
Financial assets
Debt Securities, Available-for-sale	0		0
Investment securities - equity	0		0
Derivative Asset	6		5
Loans Receivable Held-for-sale, Amount	20		1
Servicing Asset	1,007		1,148
Financial liabilities
Derivative Liability	$ 4		$ 3
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.[3] 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 June 30, 2023 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,144 $ — $ 2,144 Commercial MBS issued by GSEs — 60 — 60 Corporate debt securities — 338 — 338 Private label residential MBS — 1,141 — 1,141 Residential MBS issued by GSEs — 1,765 — 1,765 Tax-exempt — 830 — 830 U.S. Treasury securities 2,286 — — 2,286 Other 27 40 — 67 Total AFS debt securities $ 2,313 $ 6,318 $ — $ 8,631 Equity securities Common stock $ 2 $ — $ — $ 2 CRA investments 25 12 — 37 Preferred stock 95 5 — 100 Total equity securities $ 122 $ 17 $ — $ 139 Loans HFS (2) $ — $ 1,337 $ 3 $ 1,340 MSRs — — 1,007 1,007 Derivative assets (1) — 98 6 104 Liabilities: Junior subordinated debt (3) $ — $ — $ 57 $ 57 Derivative liabilities (1) — 37 4 41 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $52 million as of June 30, 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 $85 million and $12 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, 2022 (in millions) Assets: Available-for-sale debt securities CLO $ — $ 2,706 $ — $ 2,706 Commercial MBS issued by GSEs — 97 — 97 Corporate debt securities — 390 — 390 Private label residential MBS — 1,199 — 1,199 Residential MBS issued by GSEs — 1,740 — 1,740 Tax-exempt — 891 — 891 Other 24 45 — 69 Total AFS debt securities $ 24 $ 7,068 $ — $ 7,092 Equity securities Common stock $ 3 $ — $ — $ 3 CRA investments 24 25 — 49 Preferred stock 108 — — 108 Total equity securities $ 135 $ 25 $ — $ 160 Loans - HFS (2) $ — $ 1,172 $ 1 $ 1,173 Mortgage servicing rights — — 1,148 1,148 Derivative assets (1) — 42 5 47 Liabilities: Junior subordinated debt (3) $ — $ — $ 63 $ 63 Derivative liabilities (1) — 36 3 39 (1) See "Note 11. Derivatives and Hedging Activities." In addition, the carrying value of loans is decreased by $17 million as of December 31, 2022 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 $4 million and $1 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 Accounting - Additio

Fair Value Accounting - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) percent shares		Jun. 30, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) percent shares		Mar. 31, 2022 USD ($)	Jan. 25, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 07, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets acquired through foreclosure	$ 11				$ 11
Goodwill								$ 36.6		$ 199.8
Common Stock, Shares, Issued | shares	112,211,949				111,465,292
Loans Held-for-sale, Fair Value Disclosure	$ 1,340				$ 1,173
Financing Receivable, 90 Days or More Past Due, Still Accruing	1				1
Fair Value, Option, Loans Held as Assets, Aggregate Difference	27				34
Fair Value, Option, Loans Held as Assets, 90 Days or More Past Due, Aggregate Difference	(1)				0
UPB, Option, Loans Held as Assets, Current Through 89 Days	1,311				1,138
Fair Value, Option, Loans Held as Assets, Current Through 89 days, Aggregate Difference	28				34
UPB, Option, Loans Held as Assets, 90 Days or More Past Due	2				1
Investment securities - equity	139	[1]			160	[2]
Debt Securities, Available-for-sale	8,631	[1]			7,092	[2]
Fair Value, Option, Loans Held as Assets, Current Through 89 Days	1,339				1,172
Servicing Asset at Fair Value, Amount	$ 1,007		$ 826	$ 910	$ 1,148		$ 950		$ 698
Minimum | Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	48				190
Minimum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	0.091				0.085
Minimum | Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	25				25
Minimum | Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	93				87
Minimum | Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	3.3				2.9
Minimum | Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	0.71				0.69
Minimum | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	0.200				0.200
Maximum | Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	307				621
Maximum | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	0.209				0.185
Maximum | Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	56.5				56.5
Maximum | Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	100				94
Maximum | Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	5.3				5.5
Maximum | Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	1				1
Maximum | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	0.200				0.200
Weighted Average | Option Adjusted Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	237				378
Weighted Average | Conditional Prepayment Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	15.3				13.4
Weighted Average | Servicing Fee Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	34.6				33.2
Weighted Average | Cost to Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	94				90
Weighted Average | Servicing Fee Multiple
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	4.3				4.3
Weighted Average | Pull-through Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Measurement Input | percent	89				89
Weighted Average | Recapture Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Servicing Asset, Measurement Input | percent	20				0.200
Collateralized Loan Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 2,144				$ 2,706
Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	60				97
Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	338				390
Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,141				1,199
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,765				1,740
Nontaxable Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	830				891
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2,286
Other Security Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	67				69
CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	37				49
Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	100				108
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans with an allowance recorded	$ 9				7
Junior Subordinated Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Period of basis point spread	4.58%		3.36%
Percentage of LIBOR	5.55%		4.77%
Fair Value, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Loans, Net of Allowance	$ 368				295
Other assets acquired through foreclosure	11				11
Fair Value, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Loans, Net of Allowance	368				295
Other assets acquired through foreclosure	11				11
Fair Value, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Loans, Net of Allowance	0				0
Other assets acquired through foreclosure	0				0
Fair Value, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Dependent Loans, Net of Allowance	0				0
Other assets acquired through foreclosure	0				0
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable Unpaid Principal Balance	1,313				1,139
Investment securities - equity	139				160
Debt Securities, Available-for-sale	8,631				7,092
Servicing Asset at Fair Value, Amount	1,007				1,148
Fair Value, Recurring [Member] | Common Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	2				3
Fair Value, Recurring [Member] | Collateralized Loan Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2,144				2,706
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	60				97
Fair Value, Recurring [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	338				390
Fair Value, Recurring [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,141				1,199
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,765				1,740
Fair Value, Recurring [Member] | Nontaxable Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	830				891
Fair Value, Recurring [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2,286
Fair Value, Recurring [Member] | Other Security Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	67				69
Fair Value, Recurring [Member] | CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	37				49
Fair Value, Recurring [Member] | Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	100				108
Fair Value, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0				0
Debt Securities, Available-for-sale	0				0
Servicing Asset at Fair Value, Amount	1,007				1,148
Fair Value, Recurring [Member] | Level 3 [Member] | Common Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Collateralized Loan Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Nontaxable Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0
Fair Value, Recurring [Member] | Level 3 [Member] | Other Security Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0				0
Fair Value, Recurring [Member] | Level 3 [Member] | Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0				0
Fair Value, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	17				25
Debt Securities, Available-for-sale	6,318				7,068
Servicing Asset at Fair Value, Amount	0				0
Fair Value, Recurring [Member] | Level 2 [Member] | Common Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	0				0
Fair Value, Recurring [Member] | Level 2 [Member] | Collateralized Loan Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2,144				2,706
Fair Value, Recurring [Member] | Level 2 [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	60				97
Fair Value, Recurring [Member] | Level 2 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	338				390
Fair Value, Recurring [Member] | Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,141				1,199
Fair Value, Recurring [Member] | Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,765				1,740
Fair Value, Recurring [Member] | Level 2 [Member] | Nontaxable Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	830				891
Fair Value, Recurring [Member] | Level 2 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0
Fair Value, Recurring [Member] | Level 2 [Member] | Other Security Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	40				45
Fair Value, Recurring [Member] | Level 2 [Member] | CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	12				25
Fair Value, Recurring [Member] | Level 2 [Member] | Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	5				0
Fair Value, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	122				135
Debt Securities, Available-for-sale	2,313				24
Servicing Asset at Fair Value, Amount	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Common Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	2				3
Fair Value, Recurring [Member] | Level 1 [Member] | Collateralized Loan Obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Commercial Mortgage Backed Securities Issued By US Government Sponsored Enterprise [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Corporate Bond Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Residential Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | Nontaxable Municipal Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0				0
Fair Value, Recurring [Member] | Level 1 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	2,286
Fair Value, Recurring [Member] | Level 1 [Member] | Other Security Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	27				24
Fair Value, Recurring [Member] | Level 1 [Member] | CRA investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	25				24
Fair Value, Recurring [Member] | Level 1 [Member] | Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities - equity	$ 95				$ 108
[1]ratings differ, the Company uses an average of the available ratings by major credit agencies.[2]For rated securities, if ratings differ, the Company uses an average of the available ratings by major credit agencies.

Segments - Operating Segment In

Segments - Operating Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Operating Statistics [Line Items]
Service charges and fees	$ 20.8	$ 7.6	$ 30.3	$ 14.6
Cash, Cash Equivalents and Investment Securities	12,527		12,527			$ 9,803
Loans Receivable Held-for-sale, Amount	3,156		3,156			1,184
Loans and Leases Receivable, Net of Deferred Income	47,875		47,875			51,862
Less: Allowance for credit losses	(321)		(321)			(310)
Loans, net	47,554		47,554			51,552
Other Repossessed Assets	11		11			11
Goodwill and intangible assets, net	674		674			680
Other Assets Segment	4,238		4,238			4,504
Assets	68,160		68,160			67,734
Deposits	51,041		51,041			53,644
Other borrowings	10,455		10,455			7,192
Other Liabilities Segment	979		979			1,542
Total liabilities	62,475		62,475			62,378
Stockholders' equity	5,684.9	4,958.8	5,684.9	4,958.8	$ 5,520.5	5,356	$ 5,011.6	$ 4,962.6
Liabilities and Equity	68,160		68,160			67,734
Excess Funds Provided by (Used in) Segment Basis	0		0			0
Net interest income	550.3	525	1,160.2	974.5
Provision for Loan, Lease, and Other Losses	21.8	27.5	41.2	36.5
Net interest income (loss) after provision for credit losses	528.5	497.5	1,119	938
Noninterest Income	119	(95)	(61)	(201.3)
Non-interest expense	(387.4)	(268.9)	(735.3)	(517.5)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	260.1	323.6	444.7	621.8
Income tax expense (benefit)	44.4	63.4	86.8	121.5
Net income	215.7	260.2	357.9	500.3
Operating Segments [Member] | Commercial Segment
Operating Statistics [Line Items]
Cash, Cash Equivalents and Investment Securities	13		13			12
Loans Receivable Held-for-sale, Amount	1,049		1,049			0
Loans and Leases Receivable, Net of Deferred Income	28,139		28,139			31,414
Less: Allowance for credit losses	269		269			262
Loans, net	27,870		27,870			31,152
Other Repossessed Assets	11		11			11
Goodwill and intangible assets, net	293		293			293
Other Assets Segment	567		567			435
Assets	29,803		29,803			31,903
Deposits	21,460		21,460			29,494
Other borrowings	6		6			27
Other Liabilities Segment	70		70			83
Total liabilities	21,536		21,536			29,604
Stockholders' equity	2,494		2,494			2,684
Liabilities and Equity	24,030		24,030			32,288
Excess Funds Provided by (Used in) Segment Basis	5,773		5,773			(385)
Net interest income	356.5	370.5	746	705.3
Provision for Loan, Lease, and Other Losses	(18.2)	32.7	15.6	(33.2)
Net interest income (loss) after provision for credit losses	338.3	337.8	730.4	672.1
Noninterest Income	30.8	(18)	65.9	(34.9)
Non-interest expense	(147.7)	(115.9)	(283.6)	(230.4)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	221.4	239.9	380.9	476.6
Income tax expense (benefit)	43.4	57.3	81.9	113.4
Net income	178	182.6	299	363.2
Operating Segments [Member] | Consumer Related Segment
Operating Statistics [Line Items]
Cash, Cash Equivalents and Investment Securities	150		150			0
Loans Receivable Held-for-sale, Amount	2,107		2,107			1,184
Loans and Leases Receivable, Net of Deferred Income	19,736		19,736			20,448
Less: Allowance for credit losses	52		52			48
Loans, net	19,684		19,684			20,400
Other Repossessed Assets	0		0			0
Goodwill and intangible assets, net	381		381			387
Other Assets Segment	1,693		1,693			2,180
Assets	24,015		24,015			24,151
Deposits	22,380		22,380			18,492
Other borrowings	1,489		1,489			340
Other Liabilities Segment	173		173			656
Total liabilities	24,042		24,042			19,488
Stockholders' equity	1,715		1,715			1,691
Liabilities and Equity	25,757		25,757			21,179
Excess Funds Provided by (Used in) Segment Basis	1,742		1,742			(2,972)
Net interest income	204.8	219.4	404	402.7
Provision for Loan, Lease, and Other Losses	1.9	(5.2)	3.4	5.3
Net interest income (loss) after provision for credit losses	202.9	224.6	400.6	397.4
Noninterest Income	(86.1)	(74.6)	(137.1)	(153.8)
Non-interest expense	(232.3)	(139.1)	(424.4)	(264.1)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	56.7	160.1	113.3	287.1
Income tax expense (benefit)	11.2	38.1	24	68.5
Net income	45.5	122	89.3	218.6
Corporate & Other
Operating Statistics [Line Items]
Cash, Cash Equivalents and Investment Securities	12,364		12,364			9,791
Loans Receivable Held-for-sale, Amount	0		0			0
Loans and Leases Receivable, Net of Deferred Income	0		0			0
Less: Allowance for credit losses	0		0			0
Loans, net	0		0			0
Other Repossessed Assets	0		0			0
Goodwill and intangible assets, net	0		0			0
Other Assets Segment	1,978		1,978			1,889
Assets	14,342		14,342			11,680
Deposits	7,201		7,201			5,658
Other borrowings	8,960		8,960			6,825
Other Liabilities Segment	736		736			803
Total liabilities	16,897		16,897			13,286
Stockholders' equity	1,476		1,476			981
Liabilities and Equity	18,373		18,373			14,267
Excess Funds Provided by (Used in) Segment Basis	(4,031)		(4,031)			$ (2,587)
Net interest income	(11)	(64.9)	10.2	(133.5)
Provision for Loan, Lease, and Other Losses	1.7	0	22.2	(2)
Net interest income (loss) after provision for credit losses	(12.7)	(64.9)	(12)	(131.5)
Noninterest Income	(2.1)	(2.4)	10.2	(12.6)
Non-interest expense	(7.4)	(13.9)	(27.3)	(23)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	(18)	(76.4)	(49.5)	(141.9)
Income tax expense (benefit)	(10.2)	(32)	(19.1)	(60.4)
Net income	$ (7.8)	$ (44.4)	$ (30.4)	$ (81.5)

Revenue from Contracts with Cus

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Service charges and fees	$ 20.8	$ 7.6	$ 30.3	$ 14.6
Noninterest Income	(119)	95	61	201.3
Revenue from Contracts with Customers	24.3	11.3	38.3	25.6
Operating Segments [Member] | Commercial Segment
Disaggregation of Revenue [Line Items]
Noninterest Income	(30.8)	18	(65.9)	34.9
Operating Segments [Member] | Consumer Related Segment
Disaggregation of Revenue [Line Items]
Noninterest Income	86.1	74.6	137.1	153.8
Corporate & Other
Disaggregation of Revenue [Line Items]
Noninterest Income	$ 2.1	$ 2.4	$ (10.2)	$ 12.6

Business Combinations (Details)

Business Combinations (Details) - USD ($) $ in Millions			3 Months Ended	6 Months Ended
	Jan. 25, 2022	Apr. 07, 2021	Jun. 30, 2022	Jun. 30, 2022
Business Combinations [Abstract]
Business Acquisition, Effective Date of Acquisition	Jan. 25, 2022
Business Combination, Consideration Transferred	$ 57	$ 1,918.4
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	20.1	141
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Eligible for Repurchase		2,744.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	0.6	207.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Held for Sale		3,552.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Servicing Assets		1,347
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		11.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Operating Right of use Asset		18.9
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets		6.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	0.1	236
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	20.8	8,265.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		3,633.9
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation		18.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liability for Loans Eligible for Repurchase		2,744.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0.4	149.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	0.4	6,547
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	20.4	1,718.6
Payments to Acquire Businesses, Gross	50.6	1,231.6
Goodwill	$ 36.6	199.8
Business Acquisition, Effective Date of Acquisition	Jan. 25, 2022
Business Combination, Consideration Transferred	$ 57	1,918.4
Business Combination, Elimination of Pre-existing debt and other		686.8
Business Acquisition, Pro Forma Revenue			$ 442.8
Business Acquisition, Pro Forma Non-interest Income			122.8
Business Acquisition, Pro Forma Net Income (Loss)			$ 236.9
Acquisition and restructure expenses				$ 0.4
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 185
Business Combination, Contingent Consideration, Liability	6.4
Customer Relationships
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 15.7
Finite-Lived Intangible Asset, Useful Life	7 years
Developed Technology Rights
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 4.1
Finite-Lived Intangible Asset, Useful Life	5 years
Trade Names
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 0.3
Finite-Lived Intangible Asset, Useful Life	10 years

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Financing Receivable, Sale		$ 1,100
Subsequent Event [Member]
Subsequent Event [Line Items]
Financing Receivable, Sale	$ 2,000
Credit Linked Notes Maturing June 2028
Subsequent Event [Line Items]
Debt Instrument, Face Amount			$ 300
Credit Linked Notes Maturing June 2028 | Subsequent Event [Member]
Subsequent Event [Line Items]
Debt Instrument, Face Amount		$ 0