Santander Holdings USA (SOV) 10-Q 6 May 24 2024 Q1 Quarterly report Financial data

Cover

Cover - shares	3 Months Ended
	Mar. 31, 2024	Apr. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-16581
Entity Registrant Name	SANTANDER HOLDINGS USA, INC.
Entity Incorporation, State or Country Code	VA
Entity Tax Identification Number	23-2453088
Entity Address, Address Line One	75 State Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02109
City Area Code	800
Local Phone Number	493-8219
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Emerging Growth Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		530,391,043
Entity Central Index Key	0000811830
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
ASSETS
Cash and cash equivalents		$ 14,413,097	$ 13,118,428
Federal funds sold and securities purchased under resale agreements or similar arrangements	[1]	9,465,807	10,238,714
Investment securities:
AFS at fair value (amortized cost of $7,957,514 and $7,925,890 as of March 31, 2024 and December 31, 2023, respectively)		7,091,513	7,039,537
Trading securities		9,003,612	7,967,875
HTM (fair value of $7,410,927 and $7,562,523 as of March 31, 2024 and December 31, 2023, respectively)		8,969,064	9,039,704
Other investments		1,346,020	1,353,278
LHFI	[2],[3]	91,679,788	93,047,209
ALLL	[3]	(6,742,124)	(6,932,053)
Net LHFI		84,937,664	86,115,156
LHFS	[4]	596,351	160,118
Premises and equipment, net	[5]	1,015,255	987,088
Operating lease assets, net	[3],[6]	13,642,137	13,782,840
Goodwill		2,766,665	2,766,665
Intangible assets, net		277,577	287,159
BOLI		1,987,439	1,982,428
Restricted cash	[3]	5,365,963	5,549,701
Other assets	[3],[7]	4,887,576	4,583,884
TOTAL ASSETS		165,765,740	164,972,575
LIABILITIES
Accounts payables and accrued expenses		5,172,139	5,165,566
Deposits and other customer accounts		77,684,470	77,073,176
Federal funds purchased and securities loaned or sold under repurchase agreements	[8]	16,164,451	16,290,786
Trading liabilities		2,960,617	2,699,500
Borrowings and other debt obligations	[3]	43,911,347	44,144,051
Advance payments by borrowers for taxes and insurance		191,260	165,843
Deferred tax liabilities, net		39,262	84,187
Other liabilities	[3]	1,779,359	1,848,557
TOTAL LIABILITIES		147,902,905	147,471,666
Commitments and contingencies (Note 16)
MEZZANINE EQUITY
Preferred stock (no par value; 7,500,000 shares authorized; 2,000,000 shares outstanding at March 31, 2024 and December 31, 2023, respectively)		2,000,000	2,000,000
STOCKHOLDER'S EQUITY
Common stock and paid-in capital (no par value; 800,000,000 shares authorized; 530,391,043 shares outstanding at both March 31, 2024 and December 31, 2023, respectively)		17,284,611	17,284,611
Accumulated other comprehensive loss, net of taxes		(1,002,447)	(1,065,568)
Retained earnings / (accumulated deficit)		(419,329)	(718,134)
TOTAL STOCKHOLDER'S EQUITY		15,862,835	15,500,909
TOTAL LIABILITIES, MEZZANINE AND STOCKHOLDER'S EQUITY		$ 165,765,740	$ 164,972,575
[1]Includes $0.6 billion and $2.1 billion of contracts held at the FVO, at March 31, 2024 and December 31, 2023, respectively,[2]Includes $12.5 million and $13.9 million of loans recorded at fair value at March 31, 2024 and December 31, 2023, respectively.[3]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.[4]Includes $535.4 million and $19.5 million of loans recorded at the FVO at March 31, 2024 and December 31, 2023, respectively.[5]Net of accumulated depreciation of $2.4 billion and $2.3 billion at March 31, 2024 and December 31, 2023, respectively.[6]Net of accumulated depreciation of $3.3 billion and $3.5 billion at March 31, 2024 and December 31, 2023, respectively.[7]Includes MSRs of $95.8 million and $94.3 million at March 31, 2024 and December 31, 2023, respectively, for which the Company has elected the FVO.[8]Includes $362.1 million and $595.4 million of contracts recorded at the FVO at March 31, 2024 and December 31, 2023, respectively.

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Amortized cost		$ 7,957,514	$ 7,925,890
Held-to-maturity securities, fair value		$ 7,410,927	$ 7,562,523
Temporary equity, shares authorized (in shares)		7,500,000	7,500,000
Temporary equity, shares outstanding (in shares)		2,000,000	2,000,000
Common stock, shares authorized (in shares)		800,000,000	800,000,000
Common stock, shares outstanding (in shares)		530,391,043	530,391,043
Federal funds sold and securities purchased under resale agreements or similar arrangements		$ 604,292	$ 2,112,292
RICs HFI		12,500	13,900
LHFS		535,400	19,500
Accumulated depreciation		2,400,000	2,300,000
LHFI	[1],[2]	91,679,788	93,047,209
Operating lease assets, net	[2],[3]	13,642,137	13,782,840
Restricted cash	[2]	5,365,963	5,549,701
Other assets	[2],[4]	4,887,576	4,583,884
Borrowings and other debt obligations	[2]	43,911,347	44,144,051
Other liabilities	[2]	1,779,359	1,848,557
Property, plant, and equipment, lessor asset under operating lease, accumulated depreciation		3,300,000	3,500,000
Federal funds purchased and securities loaned or sold under repurchase agreements		362,103	595,414
VIEs, Primary Beneficiary
LHFI		25,065,413	25,144,797
Operating lease assets, net		13,642,137	13,782,840
Restricted cash		1,003,547	864,464
Other assets		701,005	637,987
Borrowings and other debt obligations		25,700,000	25,100,000
Other liabilities		111,313	119,280
Residential mortgages
Mortgage servicing rights		95,800	94,300
Recurring
Federal funds sold and securities purchased under resale agreements or similar arrangements		604,292	2,112,292
RICs HFI		12,494	13,888
LHFS		535,373	19,464
Mortgage servicing rights		95,776	94,266
Federal funds purchased and securities loaned or sold under repurchase agreements		$ 362,103	$ 595,414
[1]Includes $12.5 million and $13.9 million of loans recorded at fair value at March 31, 2024 and December 31, 2023, respectively.[2]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.[3]Net of accumulated depreciation of $3.3 billion and $3.5 billion at March 31, 2024 and December 31, 2023, respectively.[4]Includes MSRs of $95.8 million and $94.3 million at March 31, 2024 and December 31, 2023, respectively, for which the Company has elected the FVO.

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
INTEREST INCOME:
Loans		$ 2,115,019	$ 1,981,351
Interest-earning deposits		217,053	154,365
Interest and fees on federal funds sold and securities purchased under resale agreements or similar arrangements		637,711	522,390
Investment securities:
AFS		97,892	66,071
HTM		44,829	47,257
Trading securities		128,691	72,462
Other investments		12,691	8,253
TOTAL INTEREST INCOME		3,253,886	2,852,149
INTEREST EXPENSE:
Deposits and other customer accounts		498,920	288,837
Interest expense on federal funds purchased and securities loaned or sold under repurchase agreements		763,840	570,275
Interest expense on trading liabilities		39,078	31,856
Borrowings and other debt obligations		574,539	450,787
TOTAL INTEREST EXPENSE		1,876,377	1,341,755
NET INTEREST INCOME		1,377,509	1,510,394
Credit loss expense		404,998	542,401
NET INTEREST INCOME AFTER CREDIT LOSS EXPENSE		972,511	967,993
NON-INTEREST INCOME:
Consumer and commercial fees		84,217	90,329
Capital markets and foreign exchange income		115,970	37,082
Lease income		593,447	628,424
Miscellaneous income, net	[1]	78,931	107,472
TOTAL FEES AND OTHER INCOME		872,565	863,307
Net gain on sale of investment securities		65,166	36,960
TOTAL NON-INTEREST INCOME		937,731	900,267
GENERAL, ADMINISTRATIVE AND OTHER EXPENSES:
Compensation and benefits		533,780	491,751
Occupancy and equipment expenses		157,550	169,740
Technology, outside service, and marketing expense		184,310	169,293
Loan expense		83,575	104,444
Lease expense		461,521	486,967
Other expenses		138,545	120,979
TOTAL GENERAL, ADMINISTRATIVE AND OTHER EXPENSES		1,559,281	1,543,174
Income/(loss) before income taxes		350,961	325,086
Income tax provision		7,754	28,205
NET INCOME		$ 343,207	$ 296,881
[1]Includes equity investment income/(expense), net.

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 343,207	$ 296,881
OTHER COMPREHENSIVE INCOME, NET OF TAX
Net unrealized changes in cash flow hedge derivative financial instruments, net of tax	51,299	88,969
Net unrealized gains on investment in debt securities, net of tax	11,639	31,235
Pension and post-retirement actuarial gains, net of tax	183	485
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	63,121	120,689
COMPREHENSIVE INCOME	$ 406,328	$ 417,570

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Shares Outstanding	Common Stock and Paid-in Capital	Accumulated Other Comprehensive Income / (Loss), Net of Tax	Retained Earnings / (Accumulated Deficit)	Retained Earnings / (Accumulated Deficit) Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2022			530,391,000
Beginning Balance at Dec. 31, 2022	$ 17,429,722	$ (41,396)		$ 17,284,611	$ (1,336,023)	$ 1,481,134	$ (41,396)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	417,570				120,689	296,881
Dividends paid on common stock	(250,000)					(250,000)
Dividends paid on preferred stock	(10,513)					(10,513)
Ending balance (in shares) at Mar. 31, 2023			530,391,000
Ending Balance at Mar. 31, 2023	17,545,383			17,284,611	(1,215,334)	1,476,106
Preferred Stock / Mezzanine, beginning balance at Dec. 31, 2022	500,000
Preferred Stock / Mezzanine, ending balance at Mar. 31, 2023	$ 500,000
Beginning balance (in shares) at Dec. 31, 2023	530,391,043		530,391,000
Beginning Balance at Dec. 31, 2023	$ 15,500,909			17,284,611	(1,065,568)	(718,134)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	406,328				63,121	343,207
Dividends paid on common stock	0
Dividends paid on preferred stock	$ (44,402)					(44,402)
Ending balance (in shares) at Mar. 31, 2024	530,391,043		530,391,000
Ending Balance at Mar. 31, 2024	$ 15,862,835			$ 17,284,611	$ (1,002,447)	$ (419,329)
Preferred Stock / Mezzanine, beginning balance at Dec. 31, 2023	2,000,000
Preferred Stock / Mezzanine, ending balance at Mar. 31, 2024	$ 2,000,000

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME		$ 343,207	$ 296,881
Adjustments to reconcile net income to net cash provided by operating activities:
Credit loss expense / (benefit)		404,998	542,401
Deferred tax (benefit) / expense		(68,629)	(114,938)
Depreciation, amortization and accretion		681,435	651,303
Net (gain)/loss on sale or disposal of loans, investment securities, and other assets		(19,152)	(40,210)
Originations and purchases of LHFS		(875,053)	0
Proceeds from sales of and collections on LHFS		336,574	838
Net change in:
Trading securities and trading liabilities, net		(708,493)	(1,134,765)
Other assets and BOLI		(268,747)	(110,767)
Other liabilities		(14,603)	(339,685)
Other operating activities, net		1,211	(1,640)
NET CASH (USED IN) / PROVIDED BY OPERATING ACTIVITIES		(187,252)	(250,582)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of AFS investment securities		0	211,171
Proceeds from prepayments and maturities of AFS investment securities		192,297	386,921
Purchases of AFS investment securities		(275,114)	(220,619)
Proceeds from prepayments and maturities of HTM investment securities		129,400	116,961
Proceeds from sales of equity method and other investments		105,630	109,000
Purchases of and contributions to equity method and other investments		(160,473)	(602,316)
Distributions from equity method investments		1,409	2,247
Net change in federal funds sold and securities purchased under resale agreements		772,907	(3,054,777)
Proceeds from sales of LHFI		893,523	29,152
Purchases of LHFI		0	(46,343)
Proceeds from settlements of BOLI policies		13,183	10,106
Net change in loans other than purchases and sales		(156,718)	(2,048,986)
Purchases and originations of operating leases		(1,830,352)	(1,428,681)
Proceeds from the sale and termination of operating leases		1,445,119	1,056,302
Purchases and sales of premises and equipment, net		(52,024)	(35,899)
NET CASH PROVIDED BY / (USED IN) INVESTING ACTIVITIES		1,078,787	(5,515,761)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net change in deposits and other customer accounts		611,294	166,318
Net change in short-term borrowings		(166,745)	851,462
Net proceeds from long-term borrowings		8,011,174	7,314,681
Repayments of long-term borrowings		(8,091,007)	(5,846,658)
Net change in federal funds purchased and securities loaned or sold under repurchase agreements		(126,335)	5,651,253
Dividends paid on preferred stock		(44,402)	(10,513)
Other financing activities, net		25,417	39,669
NET CASH PROVIDED BY / (USED IN) FINANCING ACTIVITIES		219,396	8,166,212
NET INCREASE/(DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		1,110,931	2,399,869
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD		18,668,129	16,564,314
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	[1]	19,779,060	18,964,183
NON-CASH TRANSACTIONS
Loans transferred from/(to) LHFI (from)/to LHFS, net		117	120,425
Non-cash transfer of financial assets in an off-balance sheet securitization transaction		53,050	0
Dividends declared and payable to Shareholder		$ 0	$ 250,000
[1]The three months ended March 31, 2024 and 2023 include cash and cash equivalents balances of $14.4 billion and $12.6 billion, respectively, and restricted cash balances of $5.4 billion and $6.3 billion, respectively.

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024		Dec. 31, 2023		Mar. 31, 2023
Statement of Cash Flows [Abstract]
Cash and cash equivalents	$ 14,413,097		$ 13,118,428		$ 12,600,000
Restricted cash	$ 5,365,963	[1]	$ 5,549,701	[1]	$ 6,300,000
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

DESCRIPTION OF BUSINESS, BASIS

DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES	DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES SHUSA is the parent holding company of SBNA, a national banking association; SC, a consumer finance company headquartered in Dallas, Texas; BSI, a financial services company headquartered in Miami, Florida that offers a full range of banking services to foreign individuals and corporations based primarily in Latin America; SanCap, an institutional broker-dealer headquartered in New York, which has significant capabilities in market-making via an experienced fixed-income sales and trading team and a focus on structuring and advisory services for asset originators in the real estate and specialty finance markets; SSLLC, a broker-dealer headquartered in Boston, Massachusetts; and several other subsidiaries. SHUSA is headquartered in Boston and SBNA's home office is in Wilmington, Delaware. SSLLC is a registered investment adviser with the SEC. SHUSA's two largest subsidiaries by asset size and revenue are SBNA and SC. SHUSA is a wholly-owned subsidiary of Santander. The Company specializes in consumer financing focused on vehicle finance, servicing of third-party vehicle financing, and delivering service to dealers and customers across the full credit spectrum. This includes indirect origination and servicing of vehicle loans and leases, principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers, origination of vehicle loans through a web-based direct lending program, purchases of vehicle loans from other lenders, and servicing of automobile and recreational and marine vehicle portfolios for other lenders. The Company sells consumer vehicle loans and leases through flow agreements and, when market conditions are favorable, it accesses the ABS market through securitizations of consumer vehicle loans and leases. In addition to specialized consumer finance, the Company also attracts deposits and provides other retail banking services through its network of retail branches with locations in Connecticut, Delaware, Florida, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, and Rhode Island and originates small business, middle market, large and global commercial loans, multifamily loans, and other consumer loans and leases throughout the Mid-Atlantic and Northeastern areas of the United States. For large institutional investors, the Company provides structured products, emerging markets credit and U.S. investment grade credit, U.S. rates, short-term fixed-income, debt and equity capital markets, investment banking, exchange-traded derivatives, and cash equities, benefiting from a combination of Santander’s global reach and access to financial hubs together with extensive local market knowledge and regional expertise. Joint Venture with FDIC In December 2023, SBNA acquired a 20 percent interest in the Structured LLC for approximately $1.1 billion. The Structured LLC was established by the FDIC to hold and service a $9 billion portfolio primarily consisting of New York-based rent-controlled and rent-stabilized multifamily loans retained by the FDIC following a recent bank failure. SBNA classifies its 20 percent interest in the Structured LLC as an AFS debt security. Under the terms of the arrangement, SBNA will receive payments from the Structured LLC generated from net cash flows of the underlying loans based on its proportionate interest in the Structured LLC. SBNA is the loan portfolio servicer and is paid a market rate servicing fee by the Structured LLC. Basis of Presentation These Condensed Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, including certain Trusts that are considered VIEs. The Company generally consolidates VIEs for which it is deemed to be the primary beneficiary and VOEs in which the Company has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP and pursuant to SEC regulations. In the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statement of Cash Flows for the periods indicated, and contain adequate disclosure to make the information presented not misleading. Certain prior-year amounts have been reclassified to conform to the current year presentation. These reclassifications did not have a material impact on the Company's consolidated financial condition or results of operations. NOTE 1. DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES (continued) Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates, and those differences may be material. The most significant estimates include the ACL, expected end-of-term lease residual values, and goodwill. These estimates, although based on actual historical trends and modeling, may potentially show significant variances over time. Recently Adopted Accounting Standards On January 1, 2024, the Company adopted ASU 2023-02 Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method , which permits the use of an accounting policy election to apply the proportional amortization method to all tax equity investments that meet specific criteria. The adoption of this standard did not impact the Company's financial position or results of operations. On January 1, 2023, the Company adopted ASU 2022-02 Financial Instruments – Credit Losses (Topic 326) Troubled Debt Restructuring and Vintage Disclosures Recently Issued Accounting Standards Not Yet Adopted On August 23, 2023, the FASB issued ASU 2023-05 Business Combinations - Joint Venture Formations, Recognition and Initial Measurement requiring most assets and liabilities contributed to a joint venture upon formation to be measured at fair market value. The new guidance is effective prospectively for all joint ventures with a formation date on or after January 1, 2025, and early adoption is permitted. The Company does not expect a material impact on the Company’s financial position or results of operations. On November 27, 2023, the FASB issued ASU 2023-07 Segment Reporting – Improvements to Reportable Segment Disclosures, which enhances segment disclosure requirements primarily in the area of significant segment expenses. The new disclosure requirements are effective retrospectively for all periods presented beginning with the 2024 annual financial statements and interim periods thereafter, with early adoption permitted. On December 14, 2023, the FASB issued ASU 2023-09 Income Taxes – Improvements to Income Tax Disclosures, requiring consistent categories and greater disaggregation of information in the rate reconciliation, and income taxes paid disaggregated by jurisdiction. The new disclosure requirements are effective for annual periods beginning in 2025, with early adoption permitted. Subsequent Events The Company evaluated events from the date of these Condensed Consolidated Financial Statements on March 31, 2024 through the issuance of these Condensed Consolidated Financial Statements. Except as noted in Note 9 to these Condensed Consolidated Financial Statements, there were no material events in that period that would require recognition or disclosure in its Condensed Consolidated Financial Statements as of March 31, 2024.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	INVESTMENT SECURITIES Summary of Investments in Debt Securities - AFS and HTM The following table presents the amortized cost, gross unrealized gains and losses and approximate fair values of investments in debt securities AFS at the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair U.S. Treasury securities $ 226,294 $ 80 $ (15) $ 226,359 $ 25,391 $ 18 $ — $ 25,409 Corporate debt securities 2,128 2 — 2,130 31,584 7 (1) 31,590 ABS 550,506 232 (999) 549,739 512,553 29 (1,919) 510,663 Beneficial interest in Structured LLC (2) 1,105,817 — (23,469) 1,082,348 1,122,510 — — 1,122,510 MBS: GNMA - Residential 3,123,600 — (383,366) 2,740,234 3,187,600 — (394,756) 2,792,844 GNMA - Commercial 655,566 4 (144,425) 511,145 659,882 4 (141,672) 518,214 FHLMC and FNMA - Residential 2,283,311 1 (392,303) 1,891,009 2,330,558 3 (381,142) 1,949,419 FHLMC and FNMA - Commercial 91,689 — (3,140) 88,549 91,821 — (2,933) 88,888 Unallocated fair value hedge basis adjustment (1) (81,397) — 81,397 — (36,009) — 36,009 — Total investments in debt securities AFS $ 7,957,514 $ 319 $ (866,320) $ 7,091,513 $ 7,925,890 $ 61 $ (886,414) $ 7,039,537 (1) The Company has entered into fair value hedges of portions of a closed portfolio of AFS debt securities, using the portfolio layer method. Refer to Note 12 for additional information. (2) Represents a 20 percent interest in the Structured LLC to hold and service a pool of multi-family loans. The following table presents the amortized cost, gross unrealized gains and losses and approximate fair values of investments in debt securities HTM at the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair Investment securities: ABS and other interests in structured securities $ 82,024 $ — $ (283) $ 81,741 $ 29,701 $ — $ (363) $ 29,338 MBS: GNMA - Residential 2,705,439 177 (501,124) 2,204,492 2,752,158 724 (469,929) 2,282,953 GNMA - Commercial 4,793,728 — (924,608) 3,869,120 4,843,478 492 (894,635) 3,949,335 FHLMC and FNMA - Residential 1,387,873 — (132,299) 1,255,574 1,414,367 — (113,470) 1,300,897 Total investments in debt securities HTM $ 8,969,064 $ 177 $ (1,558,314) $ 7,410,927 $ 9,039,704 $ 1,216 $ (1,478,397) $ 7,562,523 As of March 31, 2024 and December 31, 2023, the Company had investment securities with an estimated carrying value of $9.2 billion and $11.2 billion, respectively, pledged as collateral. The Company's investment securities pledged as collateral were comprised of the following: $4.4 billion and $7.5 billion, respectively, were pledged as collateral for the Company's borrowing capacity with the FRB; $3.2 billion and $3.2 billion, respectively, were pledged to secure public fund deposits; $59.6 million and $95.6 million, respectively, were pledged to various independent parties to secure repurchase agreements, support hedging relationships, and for recourse on loan sales; $343.7 million and $349.9 million, respectively, were pledged to secure the Company's customer overnight sweep product; and $1.2 billion and $0.0 million, respectively, were pledged as collateral for the Company's borrowing capacity with the FHLB as of March 31, 2024 and December 31, 2023. There were no amounts pledged to secure repurchase agreements in which the secured party has the right to sell or repledge the collateral as of March 31, 2024 or December 31, 2023. The Company also participates in Securities Financing Activities discussed further in Note 11 to these Condensed Consolidated Financial Statements. At March 31, 2024 and December 31, 2023, the Company had $109.5 million and $79.6 million, respectively, of accrued interest related to investment securities which is included in the Other assets line of the Company's Condensed Consolidated Balance Sheets. No accrued interest related to investment securities was written off during the periods ended March 31, 2024 or December 31, 2023. NOTE 2. INVESTMENT SECURITIES (continued) Contractual Maturity of Investments in Debt Securities Contractual maturities of the Company’s investments in debt securities AFS at March 31, 2024 were as follows: (in thousands) Amortized Cost (1) Fair Value Due within one year $ 29,941 $ 29,899 Due after 1 year but within 5 years 332,404 327,589 Due after 5 years but within 10 years 264,315 256,947 Due after 10 years 7,412,251 6,477,078 Total $ 8,038,911 $ 7,091,513 (1) Does not include unallocated fair value hedge basis adjustment. Contractual maturities of the Company’s investments in debt securities HTM at March 31, 2024 were as follows: (in thousands) Amortized Cost Fair Value Due within one year $ — $ — Due after 1 year but within 5 years 28,974 28,690 Due after 5 years but within 10 years 57,618 57,369 Due after 10 years 8,882,472 7,324,868 Total $ 8,969,064 $ 7,410,927 Actual maturities may differ from contractual maturities when there is a right to call or prepay obligations with or without call or prepayment penalties. NOTE 2. INVESTMENT SECURITIES (continued) Gross Unrealized Loss and Fair Value of Investments in Debt Securities AFS and HTM The following table presents the aggregate amount of unrealized losses on debt securities in the Company’s AFS investment portfolios classified according to the amount of time those securities have been in a continuous loss position as of the dates indicated: March 31, 2024 December 31, 2023 Less than 12 months 12 months or longer Less than 12 months 12 months or longer (in thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 6,954 $ (15) $ — $ — $ 6,992 $ — $ — $ — Corporate debt securities 72 — 13 — 7,325 (1) 13 — ABS 84,402 (79) 131,838 (920) 6,749 (168) 402,325 (1,751) Beneficial Interest in Structured Entities 1,046,284 (23,469) — — — — — — MBS: GNMA - Residential — — 2,739,232 (383,366) — — 2,792,843 (394,756) GNMA - Commercial — — 511,142 (144,425) — — 518,210 (141,672) FHLMC and FNMA - Residential — — 1,890,924 (392,303) — — 1,949,320 (381,142) FHLMC and FNMA - Commercial — — 88,549 (3,140) — — 88,888 (2,933) Total investments in debt securities AFS (1) $ 1,137,712 $ (23,563) $ 5,361,698 $ (924,154) $ 21,066 $ (169) $ 5,751,599 $ (922,254) (1) Does not include unallocated fair value hedge basis adjustment. The following table presents the aggregate amount of unrealized losses on debt securities in the Company’s HTM investment portfolios classified according to the amount of time those securities have been in a continuous loss position as of the dates indicated: March 31, 2024 December 31, 2023 Less than 12 months 12 months or longer Less than 12 months 12 months or longer (in thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized ABS and other interests in structured securities $ 3,537 $ — $ 25,155 $ (283) $ 22,461 $ (313) $ 6,878 $ (50) MBS: GNMA - Residential 66,910 (429) 2,091,347 (500,695) — — 2,166,032 (469,929) GNMA - Commercial 69,063 (1,130) 3,800,058 (923,478) 45,983 (1,610) 3,856,536 (893,025) FHLMC and FNMA - Residential 56,350 (827) 1,199,224 (131,472) 57,955 (528) 1,242,941 (112,942) Total investments in debt securities HTM $ 195,860 $ (2,386) $ 7,115,784 $ (1,555,928) $ 126,399 $ (2,451) $ 7,272,387 $ (1,475,946) Allowance for credit-related losses on AFS and HTM securities The Company did not record an allowance for credit-related losses on AFS or HTM securities at March 31, 2024 or December 31, 2023. As discussed in Note 1 to the Company's Annual Report on Form 10-K for 2023 , securities for which management expects risk of nonpayment of the amortized cost basis is zero do not have a reserve . For securities that do not qualify for the zero credit loss expectation exception, management has concluded that the unrealized losses are not credit-related since (1) they are not related to the underlying credit quality of the issuers, (2) the entire contractual principal and interest due on these securities is currently expected to be recoverable, (3) the Company does not intend to sell these investments at a loss and (4) it is more likely than not that the Company will not be required to sell the investments before recovery of the amortized cost basis, which for the Company's debt securities may be at maturity. NOTE 2. INVESTMENT SECURITIES (continued) Gains (Losses) on Sales of Investment Securities The realized gross gains and losses from sales of investment securities were as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 AFS debt and other securities: Gross realized gains $ — $ 192 Gross realized losses — (4,690) Net realized gains/(losses) on AFS and other securities $ — $ (4,498) Total trading securities gains/(losses) 65,166 41,458 Total realized gains/(losses) in income from investments $ 65,166 $ 36,960 The Company uses the specific identification method to determine the cost of the securities sold and the gain or loss recognized. Trading Securities At March 31, 2024 and December 31, 2023, the Company held $9.0 billion and $8.0 billion, respectively, of trading securities. Gains and losses on trading securities are recorded within Net gain on sale of investment securities on the Company's Condensed Consolidated Statements of Operations. At March 31, 2024 and December 31, 2023, the Company had $8.2 billion and $7.4 billion, respectively, of assets classified as trading securities pledged as collateral to counterparties that have the right to repledge these securities. Other Investments Other investments consisted of the following as of the dates indicated: (in thousands) March 31, 2024 December 31, 2023 FHLB of Pittsburgh and FRB stock $ 571,981 $ 631,394 LIHTC investments 721,298 660,694 Equity securities not held for trading (1) 52,741 61,190 Total $ 1,346,020 $ 1,353,278 (1) Includes $4.3 million and $2.8 million of equity certificates related to an off-balance sheet securitization as of March 31, 2024 and December 31, 2023, respectively. Other investments primarily include the Company's investment in the stock of the FHLB of Pittsburgh and the FRB. These stocks do not have readily determinable fair values because their ownership is restricted and there is no market for their sale. The stocks can be sold back only at their par value of $100 per share, and FHLB stock can be sold back only to the FHLB or to another member institution. Accordingly, these stocks are carried at cos t. During the three months ended March 31, 2024, the Company purchased $39.9 million of FHLB stock at par, and redeemed $105.6 million of FHLB stock at par. The Company purchased $6.4 million of FRB stock at par and redeemed no FRB stock at par during the three months ended March 31, 2024. There was no gain or loss associated with these redemptions. The Company's LIHTC investments are accounted for using the proportional amortization method. Equity securities are measured at fair value with changes in fair value recognized in net income and consist primarily of CRA mutual fund investments. Interest-bearing deposits include deposits maturing in more than 90 days with Santander affiliates that are not consolidated.

LOANS AND ALLOWANCE FOR CREDIT

LOANS AND ALLOWANCE FOR CREDIT LOSSES	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
LOANS AND ALLOWANCE FOR CREDIT LOSSES	=760 546,536 1,395,386 1,664,572 1,442,340 569,317 226,476 5,844,627 13.5 % Total $ 5,045,821 $ 14,664,012 $ 11,480,232 $ 7,154,106 $ 2,719,879 $ 2,174,717 $ 43,238,767 100.0 % Current period gross write-offs - RICs and auto loans $ 1,094 $ 423,021 $ 379,004 $ 195,396 $ 59,777 $ 73,251 $ 1,131,543 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. As of December 31, 2023 RICs and auto loans (dollars in thousands) Amortized Cost by Origination Year (3) Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 1,075,125 $ 763,677 $ 445,542 $ 193,922 $ 120,752 $ 61,909 $ 2,660,927 6.1 % <600 5,578,707 4,219,184 2,791,141 1,093,652 778,438 458,350 14,919,472 34.1 % 600-639 3,324,732 2,483,763 1,324,435 439,996 303,441 138,715 8,015,082 18.3 % 640-679 2,535,908 1,567,064 718,649 234,883 169,431 69,668 5,295,603 12.1 % 680-719 1,754,195 1,092,896 612,871 268,978 159,209 39,934 3,928,083 9.0 % 720-759 1,052,128 830,476 583,392 256,724 122,537 24,692 2,869,949 6.6 % >=760 1,574,026 1,847,059 1,644,605 654,214 267,443 28,896 6,016,243 13.8 % Total $ 16,894,821 $ 12,804,119 $ 8,120,635 $ 3,142,369 $ 1,921,251 $ 822,164 $ 43,705,359 100.0 % Current period gross write-offs - RICs and auto loans $ 479,992 $ 1,943,905 $ 1,052,016 $ 366,896 $ 245,621 $ 194,308 $ 4,282,738 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Personal unsecured loans As of March 31, 2024 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2024 (1) 2023 2022 2021 2020 Prior Total Percent No FICO (2) $ 7,351 $ — $ — $ — $ — $ 48 $ 7,399 0.2 % <600 3 53 41 105 21 2,882 3,105 0.1 % 600-639 72 6,739 9,648 1,038 352 5,640 23,489 0.6 % 640-679 8,481 156,270 194,299 24,571 2,961 32,020 418,602 11.3 % 680-719 50,350 548,420 541,476 95,491 7,564 69,186 1,312,487 35.4 % 720-759 60,304 459,873 426,872 105,254 7,367 69,117 1,128,787 30.4 % >=760 59,595 314,592 277,828 85,337 8,427 71,843 817,622 22.0 % Total $ 186,156 $ 1,485,947 $ 1,450,164 $ 311,796 $ 26,692 $ 250,736 $ 3,711,491 100.0 % Current period gross write-offs - Personal unsecured loans $ — $ 34,328 $ 56,646 $ 16,118 $ 667 $ 2,064 $ 109,823 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. As of December 31, 2023 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 8,080 $ — $ — $ — $ — $ 49 $ 8,129 0.2 % <600 40 62 57 35 32 2,883 3,109 0.1 % 600-639 7,634 11,300 1,205 418 390 5,752 26,699 0.7 % 640-679 175,427 228,631 30,445 3,442 2,479 31,341 471,765 11.6 % 680-719 610,259 599,431 154,687 10,264 5,721 69,897 1,450,259 35.6 % 720-759 511,424 444,493 181,398 15,625 5,847 70,518 1,229,305 30.3 % >=760 350,721 274,043 148,550 20,357 6,020 73,743 873,434 21.5 % Total $ 1,663,585 $ 1,557,960 $ 516,342 $ 50,141 $ 20,489 $ 254,183 $ 4,062,700 100.0 % Current period gross write-offs - Personal unsecured loans $ 30,001 $ 179,550 $ 75,237 $ 4,837 $ 2,205 $ 5,621 $ 297,451 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Consumer Lending Asset Quality Indicators-FICO and LTV Ratio For both residential and home equity loans, loss severity assumptions are incorporated in the loan and lease loss reserve models to estimate loan balances that will ultimately charge off. These assumptions are based on recent loss experience within various current LTV bands within these portfolios. LTVs are refreshed quarterly by applying Federal Housing Finance Agency Home price index changes at a state-by-state level to the last known appraised value of the property to estimate the current LTV. The Company's CECL loss calculation incorporates the refreshed LTV information to update the distribution of defaulted loans by LTV as well as the associated LGD for each LTV band. Reappraisals on a recurring basis at the individual property level are not considered cost-effective or necessary; however, reappraisals are performed on certain higher risk accounts to support line management activities, default servicing decisions, or when other situations arise for which, the Company believes the additional expense is warranted. FICO scores are refreshed quarterly, where possible. The indicators disclosed represent the credit scores for loans as of the date presented based on the most recent assessment performed. Residential mortgage and home equity financing receivables by LTV and FICO range are summarized as follows: As of March 31, 2024 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2024 (1) 2023 (1) 2022 2021 2020 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,747 $ 2,747 $ — <= 70% — — 189,887 1,019,015 867,980 2,504,019 4,580,901 — 70.01% - 110% — — 81,541 55,319 — 5,681 142,541 — Greater than 110% — — — — — 372 372 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 3,507 $ 3,507 $ — <600 — — 12,524 20,550 15,271 145,170 193,515 — 600-679 — — 21,964 47,937 31,063 220,680 321,644 — 680-759 — — 70,445 220,738 192,388 661,083 1,144,654 — >=760 — — 166,495 785,109 629,258 1,482,379 3,063,241 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — Current period gross write-offs - Residential mortgages $ — $ — $ — $ — $ — $ 12 $ 12 Home equity LTV ratios No LTV available (2) $ — $ — $ 1,714 $ 4,591 $ 4,418 $ 56,733 $ 67,456 $ 43,745 <= 70% — — 42,007 160,111 170,856 1,875,850 2,248,824 2,174,539 70.01% - 110% — — 3,883 1,409 — 11,602 16,894 14,133 Greater than 110% — — 621 154 — 1,132 1,907 1,907 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 FICO scores No FICO score available $ — $ — $ 724 $ 2,495 $ 2,631 $ 54,444 $ 60,294 $ 36,587 <600 — — 697 2,913 5,403 135,875 144,888 126,879 600-679 — — 1,915 9,421 9,460 227,775 248,571 231,058 680-759 — — 17,432 52,431 58,706 622,422 750,991 733,658 >=760 — — 27,457 99,005 99,074 904,801 1,130,337 1,106,142 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 Current period gross write-offs - home equity $ — $ — $ — $ — $ — $ 2,507 $ 2,507 (1) Loans originated during the three months ended March 31, 2024. The Company ceased origination of new residential mortgage and home equity loans in 2022. (2) Balances in the "No LTV available" or "No FICO score available" ranges primarily represent loans serviced by others, in run-off portfolios or for which a current LTV or FICO score is unavailable. (3) The ALLL model considers LTV for financing receivables in first lien position and CLTV for financing receivables in second lien position for the Company. (4) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) As of December 31, 2023 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2023 (1) 2022 2021 2020 2019 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,156 $ 2,156 $ — <= 70% — 190,214 1,024,024 880,476 590,828 1,977,309 4,662,851 — 70.01% - 110% — 83,925 61,624 — — 5,287 150,836 — Greater than 110% — — — — — 375 375 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 2,926 $ 2,926 $ — <600 — 9,909 15,601 13,053 30,094 109,302 177,959 — 600-679 — 20,516 43,327 32,157 51,103 189,585 336,688 — 680-759 — 83,098 256,737 202,173 160,961 517,085 1,220,054 — >=760 — 160,616 769,983 633,093 348,670 1,166,229 3,078,591 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — Current period gross write-offs - Residential mortgages $ — $ 33 $ 22 $ — $ 16 $ 182 $ 253 Home equity LTV ratios No LTV available (2) $ — $ 1,577 $ 3,904 $ 3,848 $ 3,747 $ 53,593 $ 66,669 $ 42,375 <= 70% — 43,661 168,205 179,258 230,879 1,737,887 2,359,890 2,285,157 70.01% - 110% — 3,742 1,968 — 23 13,630 19,363 16,576 Greater than 110% — 607 156 — — 1,769 2,532 2,532 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 FICO scores No FICO score available $ — $ 703 $ 2,471 $ 2,597 $ 3,328 $ 52,044 $ 61,143 $ 36,854 <600 — 430 2,774 3,942 6,652 126,607 140,405 123,232 600-679 — 3," id="sjs-B4">LOANS AND ALLOWANCE FOR CREDIT LOSSES Overall The Company's LHFI are generally reported at their outstanding principal balances net of any cumulative charge-offs, unamortized deferred fees and costs and unamortized premiums or discounts. Certain LHFI are accounted for at fair value under the FVO. Certain loans are pledged as collateral for borrowings, securitizations, or SPEs. These loans totaled $59.2 billion at March 31, 2024 and $60.3 billion at December 31, 2023. Loans that the Company no longer intends to hold to maturity or for the foreseeable future are classified as LHFS. The LHFS portfolio balance at March 31, 2024 was $596.4 million, compared to $160.1 million at December 31, 2023. For a discussion on the valuation of LHFS at fair value, see Note 13 to these Condensed Consolidated Financial Statements. Interest on loans is credited to income as it is earned. Loan origination fees and certain direct loan origination costs are deferred and recognized as adjustments to interest income in the Condensed Consolidated Statements of Operations generally over the contractual life of the loan utilizing the interest method. Loan origination costs and fees and premiums and discounts on RICs are deferred and recognized in interest income over their estimated lives using estimated prepayment speeds, which are updated on a monthly basis. At March 31, 2024 and December 31, 2023, accrued interest receivable on the Company's loans was $624.8 million and $661.0 million, respectively. During the first quarter of 2024, the Company transferred $1.1 billion in RIC loans to a newly formed off-balance sheet trust. Refer to Note 7 of these Condensed Consolidated Financial Statements for more information. Loan and Lease Portfolio Composition The following presents the composition of loans and leases HFI by portfolio and by rate type as of the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Amount Percent Amount Percent Commercial LHFI: CRE loans $ 9,073,614 9.9 % $ 8,747,544 9.4 % C&I loans 10,825,263 11.8 % 11,181,962 12.0 % Multifamily loans 10,232,335 11.2 % 10,548,905 11.3 % Other commercial (2) 7,484,125 8.2 % 7,476,113 8.0 % Total commercial LHFI $ 37,615,337 41.1 % $ 37,954,524 40.7 % Consumer loans secured by real estate: Residential mortgages 4,726,561 5.2 % 4,816,218 5.2 % Home equity loans and lines of credit 2,335,081 2.5 % 2,448,454 2.6 % Total consumer loans secured by real estate $ 7,061,642 7.7 % $ 7,264,672 7.8 % Consumer loans not secured by real estate: RICs and auto loans 43,238,767 47.1 % 43,705,359 47.0 % Personal unsecured loans 3,711,491 4.0 % 4,062,700 4.4 % Other consumer (3) 52,551 0.1 % 59,954 0.1 % Total consumer loans $ 54,064,451 58.9 % $ 55,092,685 59.3 % Total LHFI (1) $ 91,679,788 100.0 % $ 93,047,209 100.0 % Total LHFI: Fixed rate $ 63,946,587 69.7 % $ 65,960,370 70.9 % Variable rate 27,733,201 30.3 % 27,086,839 29.1 % Total LHFI (1) $ 91,679,788 100.0 % $ 93,047,209 100.0 % (1) Total LHFI includes unamortized deferred loan fees, net of deferred origination costs; unamortized purchase premiums, net of discounts; unamortized participation fees; accretable subvention; as well as purchase accounting adjustments. These items resulted in a net positive adjustment to the loan balances of $497.2 million and $475.0 million as of March 31, 2024 and December 31, 2023, respectively. (2) Other commercial includes CEVF leveraged leases and loans. (3) Other consumer primarily includes RV and marine loans. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Portfolio segments and classes The Company discloses information about the credit quality of its financing receivables at disaggregated levels, specifically defined as “portfolio segments” and “classes,” based on management’s systematic methodology for determining the ACL. The Company utilizes similar categorization compared to the financial statement categorization of loans to model and calculate the ACL and track the credit quality, delinquency and impairment status of the underlying loan populations. In disaggregating its financing receivables portfolio, the Company’s methodology begins with the commercial and consumer segments. The commercial segmentation reflects line of business distinctions. The CRE line of business includes C&I owner-occupied real estate and specialized lending for investment real estate. C&I includes non-real estate-related commercial loans. "Multifamily" represents loans for multifamily residential housing units. “Other commercial” includes loans to global customer relationships in Latin America which are not defined as commercial or consumer for regulatory purposes. The remainder of the portfolio primarily represents the CEVF portfolio. The Company's portfolio classes are substantially the same as its financial statement categorization of loans for consumer loan populations. “Residential mortgages” includes mortgages on residential property, including single family and 1-4 family units. "Home equity loans and lines of credit" include all organic home equity contracts and purchased home equity portfolios. "RICs and auto loans" includes the Company's direct automobile loan portfolios but excludes RV and marine RICs. "Personal unsecured loans" includes personal revolving loans and credit cards. “Other consumer” includes an acquired portfolio of marine RICs and RV contracts. ACL Rollforward by Portfolio Segment The ACL is comprised of the ALLL and the reserve for unfunded lending commitments. The activity in the ACL by portfolio segment was as follows for the periods indicated: Three months ended March 31, 2024 (in thousands) Commercial Consumer Total ALLL, beginning of period $ 616,788 $ 6,315,265 $ 6,932,053 Credit loss (benefit) / expense (15,855) 424,389 408,534 Charge-offs (23,776) (1,244,661) (1,268,437) Recoveries 12,790 657,184 669,974 Charge-offs, net of recoveries $ (10,986) $ (587,477) $ (598,463) ALLL, end of period $ 589,947 $ 6,152,177 $ 6,742,124 Reserve for unfunded lending commitments, beginning of period $ 55,846 $ 4,916 $ 60,762 Credit loss (benefit) on unfunded lending commitments (2,979) (557) (3,536) Reserve for unfunded lending commitments, end of period $ 52,867 $ 4,359 $ 57,226 Total ACL, end of period $ 642,814 $ 6,156,536 $ 6,799,350 Three months ended March 31, 2023 (in thousands) Commercial Consumer Total ALLL, beginning of period $ 562,216 $ 6,217,783 $ 6,779,999 Day 1: Adjustment to allowance for adoption of ASU 2022-02 4,986 50,254 55,240 Credit loss expense 21,478 520,771 542,249 Charge-offs (26,866) (1,119,100) (1,145,966) Recoveries 19,281 664,489 683,770 Charge-offs, net of recoveries $ (7,585) $ (454,611) $ (462,196) ALLL, end of period $ 581,095 $ 6,334,197 $ 6,915,292 Reserve for unfunded lending commitments, beginning of period $ 77,709 $ 7,873 $ 85,582 Credit loss (benefit) on unfunded lending commitments 166 (14) 152 Reserve for unfunded lending commitments, end of period $ 77,875 $ 7,859 $ 85,734 Total ACL, end of period $ 658,970 $ 6,342,056 $ 7,001,026 NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The credit risk in the Company’s loan portfolios is driven by credit and collateral quality and is affected by borrower-specific and economy-wide factors. In general, there is an inverse relationship between the credit quality of loans and projections of impairment losses so that loans with better credit quality require a lower expected loss reserve. The Company manages this risk through its underwriting, pricing strategies, credit policy standards, and servicing guidelines and practices, as well as the application of geographic and other concentration limits. The Company estimates CECL based on prospective information as well as account-level models based on historical data. Unemployment, HPI, CRE price index and used vehicle index growth rates, along with loan level characteristics, are the key inputs used in the models for prediction of the likelihood that the borrower will default in the forecasted period (the PD) and the loss in the event of default (the LGD). GDP is also a key input used in the models for the prediction of the likelihood that a borrower will default. The Company has determined the reasonable and supportable period to be three years, at which time the economic forecasts generally tend to revert to historical averages. The Company also utilizes qualitative adjustments to capture any additional risks that may not be captured in either the economic forecasts or in the historical data, including consideration of several factors such as the interpretation of economic trends and uncertainties, changes in the nature and volume of loan portfolios, trends in delinquency and collateral values, and concentration risk. The Company generally uses a third-party vendor's consensus baseline macroeconomic scenario for the quantitative estimate and additional positive and negative macroeconomic scenarios to make qualitative adjustments for macroeconomic uncertainty and considers adjustments to macroeconomic inputs and outputs based on market volatility. The baseline scenario was based on the latest consensus forecasts available which showed an improvement in key variables in the current quarter, including an expected improvement in unemployment rates (which is a key driver to losses) and the GDP growth rate, offset by expected worsening of the commercial real estate outlook (mainly office), indicating that there may be challenges ahead. The unemployment rate and used vehicle price index, which is a measure of wholesale used car price trends, are considered the most significant variables. Using the weighted-average of a range of economic forecast scenarios, we estimated at March 31, 2024 that the unemployment rate is expected to be approximately 4.9% at the end of 2024, slightly better than our previous estimate of 5.0% at December 31, 2023 for that period. Additionally, the weighted used vehicle index, where a higher number corresponds to a higher used car price at auction, is estimated at March 31, 2024 to be approximately 198 at the end of 2024 compared to our estimate at December 31, 2023 of approximately 201 for that period. While the economy saw significant recovery post pandemic, there is still considerable uncertainty regarding overall lifetime loss estimates due to persistent inflation and high interest rates. The Company's ACL was $6.8 billion at March 31, 2024, a decrease of $193.5 million from December 31, 2023. The decrease in the ACL was primarily driven by improvement in the macroeconomic outlook for certain macro variables, seasonally expected lower delinquencies in RICs and auto loans, sale of certain RICs and auto loans and lower exposure in Personal unsecured loans. The ACL for the consumer segment decreased by $163.6 million, and the ACL for the commercial segment decreased $29.8 million, for the period ended March 31, 2024 compared to December 31, 2023. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Non-accrual loans by Class of Financing Receivable The amortized cost basis of financing receivables that are non-accrual and other non-performing assets disaggregated by class of financing receivables (as well as the amount of non-accrual loans for which no related allowance is recorded) are as follows at the dates indicated: Non-accrual loans and other non-performing assets as of: (1) Non-accrual loans with no related allowance (in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Non-accrual loans: Commercial: CRE $ 257,807 $ 267,537 $ 131,601 $ 64,383 C&I 159,037 143,504 847 2,230 Multifamily 102,024 97,228 17,684 17,801 Other commercial 7,320 5,621 — — Total commercial loans $ 526,188 $ 513,890 $ 150,132 $ 84,414 Consumer: Residential mortgages 51,648 52,718 5,720 5,898 Home equity loans and lines of credit 79,499 86,332 14,111 15,241 RICs and auto loans 1,829,983 2,194,509 139,077 153,850 Personal unsecured loans 20,302 21,267 1,844 1,776 Other consumer 13,598 15,733 49 152 Total consumer loans $ 1,995,030 $ 2,370,559 $ 160,801 $ 176,917 Total non-accrual loans $ 2,521,218 $ 2,884,449 $ 310,933 $ 261,331 OREO 19,422 24,246 — — Repossessed vehicles 267,545 265,368 — — Foreclosed and other repossessed assets 2,030 1,666 — — Total OREO and other repossessed assets $ 288,997 $ 291,280 $ — $ — Total non-performing assets $ 2,810,215 $ 3,175,729 $ 310,933 $ 261,331 (1) Interest income recognized on nonaccrual loans was $61.0 million and $49.1 million for the three months ended March 31, 2024 and March 31, 2023, respectively. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Age Analysis of Past Due Loans The Company generally considers an account delinquent when an obligor fails to pay substantially all (defined as 90%) of the scheduled payment by the due date. When an account is deferred, the loan is returned to accrual status during the deferral period and accrued interest related to the loan is evaluated for collectability. The amortized cost of past due loans and accruing loans 90 days or greater past due disaggregated by class of financing receivables is summarized as follows at the dates indicated: As of: March 31, 2024 (in thousands) 30-89 90 Total Current Total Amortized Cost Commercial: CRE (2) $ 51,411 $ 136,449 $ 187,860 $ 9,281,429 $ 9,469,289 $ — C&I (1) 53,974 11,687 65,661 10,811,315 10,876,976 — Multifamily (4) 44,139 63,265 107,404 10,134,195 10,241,599 — Other commercial 28,392 3,295 31,687 7,452,439 7,484,126 — Consumer: Residential mortgages (3) 89,074 46,739 135,813 4,730,446 4,866,259 — Home equity loans and lines of credit 38,869 65,321 104,190 2,230,891 2,335,081 — RICs and auto loans 4,596,175 447,075 5,043,250 38,195,517 43,238,767 — Personal unsecured loans 78,384 41,283 119,667 3,591,824 3,711,491 7,917 Other consumer 1,492 257 1,749 50,802 52,551 — Total $ 4,981,910 $ 815,371 $ 5,797,281 $ 86,478,858 $ 92,276,139 $ 7,917 (1) C&I loans includes $51.7 million of LHFS at March 31, 2024. (2) CRE loans includes $395.7 million LHFS at March 31, 2024. (3) Residential mortgages include $139.7 million of LHFS at March 31, 2024. (4) Multifamily loans include $9.3 million of LHFS at March 31, 2024. As of: December 31, 2023 (in thousands) 30-89 90 Total Current Total Recorded Commercial: CRE (2) $ 98,799 $ 62,645 $ 161,444 $ 8,586,100 $ 8,747,544 $ — C&I (1) 54,367 12,260 66,627 11,246,726 11,313,353 — Multifamily (4) — 62,391 62,391 10,495,778 10,558,169 — Other commercial 48,075 3,260 51,335 7,424,778 7,476,113 — Consumer: Residential mortgages (3) 99,171 47,019 146,190 4,689,491 4,835,681 — Home equity loans and lines of credit 36,297 71,936 108,233 2,340,221 2,448,454 — RICs and auto loans 5,393,627 558,208 5,951,835 37,753,524 43,705,359 — Personal unsecured loans 84,379 44,389 128,768 3,933,932 4,062,700 7,947 Other consumer 2,213 345 2,558 57,396 59,954 — Total $ 5,816,928 $ 862,453 $ 6,679,381 $ 86,527,946 $ 93,207,327 $ 7,947 (1) C&I loans included $131.4 million of LHFS at December 31, 2023. (2) CRE loans includes $0.0 million of LHFS at December 31, 2023. (3) Residential mortgages included $19.5 million of LHFS at December 31, 2023 . (4) Multifamily loans include $9.3 million of LHFS at December 31, 2023. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Commercial Lending Asset Quality Indicators The Company's Risk Department performs a credit analysis and classifies certain loans over an internal threshold based on the commercial lending classifications described below: PASS. Asset is well-protected by the current net worth and paying capacity of the obligor or guarantors, if any, or by the fair value less costs to acquire and sell any underlying collateral in a timely manner. SPECIAL MENTION. Asset has potential weaknesses that deserve management’s close attention, which, if left uncorrected, may result in deterioration of the repayment prospects for an asset at some future date. Special mention assets are not adversely classified. SUBSTANDARD. Asset is inadequately protected by the current net worth and paying capacity of the obligor or by the collateral pledged, if any. A well-defined weakness or weaknesses exist that jeopardize the liquidation of the debt. The loans are characterized by the distinct possibility that the Company will sustain some loss if deficiencies are not corrected. DOUBTFUL. Exhibits the inherent weaknesses of a substandard credit. Additional characteristics exist that make collection or liquidation in full highly questionable and improbable, on the basis of currently known facts, conditions and values. Possibility of loss is extremely high, but because of certain important and reasonable specific pending factors which may work to the advantage and strengthening of the credit, an estimated loss cannot yet be determined. LOSS. Credit is considered uncollectible and of such little value that it does not warrant consideration as an active asset. There may be some recovery or salvage value, but there is doubt as to whether, how much or when the recovery would occur. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Each commercial loan is evaluated to determine its risk rating at least annually. The indicators represent the rating for loans as of the date presented based on the most recent assessment performed. Amortized cost basis of loans in the commercial portfolio segment by credit quality indicator, class of financing receivable, and year of origination are summarized as follows: March 31, 2024 Commercial Loan Portfolio (2) (dollars in thousands) Amortized Cost by Origination Year Regulatory Rating: 2024 (1) 2023 2022 2021 2020 Prior Total (3) CRE Pass $ 426,558 $ 411,544 $ 2,317,656 $ 1,777,346 $ 1,027,695 $ 1,868,070 $ 7,828,869 Special mention — 7,138 245,356 259,279 99,610 333,010 944,393 Substandard — — 129,599 180,066 63,802 274,071 647,538 Doubtful — — — — — 48,489 48,489 Total CRE $ 426,558 $ 418,682 $ 2,692,611 $ 2,216,691 $ 1,191,107 $ 2,523,640 $ 9,469,289 Current period gross write-offs - CRE $ — $ — $ — $ 1 $ — $ 662 $ 663 C&I Pass $ 106,439 $ 1,060,293 $ 2,630,707 $ 1,763,078 $ 833,338 $ 3,101,853 $ 9,495,708 Special mention 48 8,998 50,709 12,777 — 102,473 175,005 Substandard — 20 58,887 73,349 62,858 283,880 478,994 N/A 73,316 247,843 232,808 109,823 34,316 29,163 727,269 Total C&I $ 179,803 $ 1,317,154 $ 2,973,111 $ 1,959,027 $ 930,512 $ 3,517,369 $ 10,876,976 Current period gross write-offs - C&I $ — $ 2,582 $ 5,464 $ 2,502 $ 896 $ 6,568 $ 18,012 Multifamily Pass $ 40,964 $ 1,130,377 $ 2,899,579 $ 1,278,138 $ 942,397 $ 2,464,286 $ 8,755,741 Special mention — 123,607 131,695 143,150 — 214,976 613,428 Substandard — — 300,955 127,419 70,700 373,356 872,430 Total multifamily $ 40,964 $ 1,253,984 $ 3,332,229 $ 1,548,707 $ 1,013,097 $ 3,052,618 $ 10,241,599 Current period gross write-offs - Multifamily $ — $ — $ — $ — $ — $ 1,102 $ 1,102 Remaining commercial Pass $ 1,373,608 $ 2,185,241 $ 1,474,652 $ 1,008,566 $ 383,680 $ 1,043,265 $ 7,469,012 Special mention — — 325 3,289 — 1,194 4,808 Substandard — 758 2,299 1,648 656 4,945 10,306 Total remaining commercial $ 1,373,608 $ 2,185,999 $ 1,477,276 $ 1,013,503 $ 384,336 $ 1,049,404 $ 7,484,126 Current period gross write-offs - Remaining commercial $ — $ 280 $ 13 $ 21 $ — $ 3,685 $ 3,999 Total commercial loans Pass $ 1,947,569 $ 4,787,455 $ 9,322,594 $ 5,827,128 $ 3,187,110 $ 8,477,474 $ 33,549,330 Special mention 48 139,743 428,085 418,495 99,610 651,653 1,737,634 Substandard — 778 491,740 382,482 198,016 936,252 2,009,268 Doubtful — — — — — 48,489 48,489 N/A 73,316 247,843 232,808 109,823 34,316 29,163 727,269 Total commercial loans $ 2,020,933 $ 5,175,819 $ 10,475,227 $ 6,737,928 $ 3,519,052 $ 10,143,031 $ 38,071,990 Current period gross write-offs - Total commercial $ — $ 2,862 $ 5,477 $ 2,524 $ 896 $ 12,017 $ 23,776 (1) Loans originated during the three months ended March 31, 2024. (2) Includes $456.7 million of LHFS at March 31, 2024. (3) Includes $19.5 million revolving loans converted to term loans. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) December 31, 2023 Commercial Loan Portfolio (2) (dollars in thousands) Amortized Cost by Origination Year Regulatory Rating: 2023 (1) 2022 2021 2020 2019 Prior Total (3) CRE Pass $ 353,350 $ 1,947,060 $ 1,800,140 $ 1,108,882 $ 674,347 $ 1,343,095 $ 7,226,874 Special mention 3,747 178,287 145,212 102,550 245,385 114,666 789,847 Substandard — 112,872 188,061 63,806 85,138 232,168 682,045 Doubtful — — — — 48,778 — 48,778 Total CRE $ 357,097 $ 2,238,219 $ 2,133,413 $ 1,275,238 $ 1,053,648 $ 1,689,929 $ 8,747,544 Current period gross write-offs - CRE $ — $ — $ 37,982 $ — $ 28,626 $ 8,637 $ 75,245 C&I Pass $ 1,073,864 $ 2,930,616 $ 1,941,561 $ 1,002,562 $ 993,395 $ 1,923,607 $ 9,865,605 Special mention 6,256 96,218 4,695 2,668 10,686 139,360 259,883 Substandard 100 14,786 82,563 70,458 50,881 230,798 449,586 N/A 272,220 259,671 126,449 41,229 32,916 5,794 738,279 Total C&I $ 1,352,440 $ 3,301,291 $ 2,155,268 $ 1,116,917 $ 1,087,878 $ 2,299,559 $ 11,313,353 Current period gross write-offs - C&I $ 3,440 $ 20,806 $ 12,749 $ 5,012 $ 11,287 $ 19,224 $ 72,518 Multifamily Pass $ 1,147,959 $ 3,000,968 $ 1,358,513 $ 949,385 $ 1,422,205 $ 1,289,127 $ 9,168,157 Special mention 116,789 107,137 101,850 — 160,535 72,513 558,824 Substandard — 302,057 128,023 61,041 172,983 167,084 831,188 Total multifamily $ 1,264,748 $ 3,410,162 $ 1,588,386 $ 1,010,426 $ 1,755,723 $ 1,528,724 $ 10,558,169 Current period gross write-offs - Multifamily $ — $ — $ — $ — $ 1,267 $ 2,684 $ 3,951 Remaining commercial Pass $ 3,154,497 $ 1,598,202 $ 1,157,726 $ 491,229 $ 248,309 $ 811,827 $ 7,461,790 Special mention — 355 3,624 — — 1,410 5,389 Substandard 283 2,262 1,524 765 311 3,789 8,934 Total remaining commercial $ 3,154,780 $ 1,600,819 $ 1,162,874 $ 491,994 $ 248,620 $ 817,026 $ 7,476,113 Current period gross write-offs - Remaining commercial $ 205 $ — $ 27 $ — $ — $ 6,211 $ 6,443 Total commercial loans Pass $ 5,729,670 $ 9,476,846 $ 6,257,940 $ 3,552,058 $ 3,338,256 $ 5,367,656 $ 33,722,426 Special mention 126,792 381,997 255,381 105,218 416,606 327,949 1,613,943 Substandard 383 431,977 400,171 196,070 309,313 633,839 1,971,753 Doubtful — — — — 48,778 — 48,778 N/A 272,220 259,671 126,449 41,229 32,916 5,794 738,279 Total commercial loans $ 6,129,065 $ 10,550,491 $ 7,039,941 $ 3,894,575 $ 4,145,869 $ 6,335,238 $ 38,095,179 Current period gross write-offs - Total commercial $ 3,645 $ 20,806 $ 50,758 $ 5,012 $ 41,180 $ 36,756 $ 158,157 (1) Loans originated during the year ended December 31, 2023. (2) Includes $140.7 million of LHFS at December 31, 2023. (3) Includes $126.6 million revolving loans converted to term loans. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Consumer Lending Asset Quality Indicators-Credit Score Consumer financing receivables for which either an internal or external credit score is a core component of the allowance model are summarized by credit score determined at origination as follows: RICs and Auto Loans As of March 31, 2024 RICs and auto loans (dollars in thousands) Amortized Cost by Origination Year (3) Credit Score Range 2024 (1) 2023 2022 2021 2020 Prior Total Percent No FICO (2) $ 351,986 $ 951,574 $ 663,701 $ 386,928 $ 164,092 $ 140,861 $ 2,659,142 6.1 % <600 1,717,899 5,123,759 3,787,821 2,460,390 945,612 994,526 15,030,007 34.8 % 600-639 1,012,644 3,010,813 2,226,481 1,166,610 379,354 351,803 8,147,705 18.8 % 640-679 658,565 1,884,000 1,407,548 635,691 202,476 186,407 4,974,687 11.5 % 680-719 463,654 1,396,779 981,350 545,012 234,360 158,661 3,779,816 8.7 % 720-759 294,537 901,701 748,759 517,135 224,668 115,983 2,802,783 6.6 % >=760 546,536 1,395,386 1,664,572 1,442,340 569,317 226,476 5,844,627 13.5 % Total $ 5,045,821 $ 14,664,012 $ 11,480,232 $ 7,154,106 $ 2,719,879 $ 2,174,717 $ 43,238,767 100.0 % Current period gross write-offs - RICs and auto loans $ 1,094 $ 423,021 $ 379,004 $ 195,396 $ 59,777 $ 73,251 $ 1,131,543 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. As of December 31, 2023 RICs and auto loans (dollars in thousands) Amortized Cost by Origination Year (3) Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 1,075,125 $ 763,677 $ 445,542 $ 193,922 $ 120,752 $ 61,909 $ 2,660,927 6.1 % <600 5,578,707 4,219,184 2,791,141 1,093,652 778,438 458,350 14,919,472 34.1 % 600-639 3,324,732 2,483,763 1,324,435 439,996 303,441 138,715 8,015,082 18.3 % 640-679 2,535,908 1,567,064 718,649 234,883 169,431 69,668 5,295,603 12.1 % 680-719 1,754,195 1,092,896 612,871 268,978 159,209 39,934 3,928,083 9.0 % 720-759 1,052,128 830,476 583,392 256,724 122,537 24,692 2,869,949 6.6 % >=760 1,574,026 1,847,059 1,644,605 654,214 267,443 28,896 6,016,243 13.8 % Total $ 16,894,821 $ 12,804,119 $ 8,120,635 $ 3,142,369 $ 1,921,251 $ 822,164 $ 43,705,359 100.0 % Current period gross write-offs - RICs and auto loans $ 479,992 $ 1,943,905 $ 1,052,016 $ 366,896 $ 245,621 $ 194,308 $ 4,282,738 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Personal unsecured loans As of March 31, 2024 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2024 (1) 2023 2022 2021 2020 Prior Total Percent No FICO (2) $ 7,351 $ — $ — $ — $ — $ 48 $ 7,399 0.2 % <600 3 53 41 105 21 2,882 3,105 0.1 % 600-639 72 6,739 9,648 1,038 352 5,640 23,489 0.6 % 640-679 8,481 156,270 194,299 24,571 2,961 32,020 418,602 11.3 % 680-719 50,350 548,420 541,476 95,491 7,564 69,186 1,312,487 35.4 % 720-759 60,304 459,873 426,872 105,254 7,367 69,117 1,128,787 30.4 % >=760 59,595 314,592 277,828 85,337 8,427 71,843 817,622 22.0 % Total $ 186,156 $ 1,485,947 $ 1,450,164 $ 311,796 $ 26,692 $ 250,736 $ 3,711,491 100.0 % Current period gross write-offs - Personal unsecured loans $ — $ 34,328 $ 56,646 $ 16,118 $ 667 $ 2,064 $ 109,823 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. As of December 31, 2023 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 8,080 $ — $ — $ — $ — $ 49 $ 8,129 0.2 % <600 40 62 57 35 32 2,883 3,109 0.1 % 600-639 7,634 11,300 1,205 418 390 5,752 26,699 0.7 % 640-679 175,427 228,631 30,445 3,442 2,479 31,341 471,765 11.6 % 680-719 610,259 599,431 154,687 10,264 5,721 69,897 1,450,259 35.6 % 720-759 511,424 444,493 181,398 15,625 5,847 70,518 1,229,305 30.3 % >=760 350,721 274,043 148,550 20,357 6,020 73,743 873,434 21.5 % Total $ 1,663,585 $ 1,557,960 $ 516,342 $ 50,141 $ 20,489 $ 254,183 $ 4,062,700 100.0 % Current period gross write-offs - Personal unsecured loans $ 30,001 $ 179,550 $ 75,237 $ 4,837 $ 2,205 $ 5,621 $ 297,451 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Consumer Lending Asset Quality Indicators-FICO and LTV Ratio For both residential and home equity loans, loss severity assumptions are incorporated in the loan and lease loss reserve models to estimate loan balances that will ultimately charge off. These assumptions are based on recent loss experience within various current LTV bands within these portfolios. LTVs are refreshed quarterly by applying Federal Housing Finance Agency Home price index changes at a state-by-state level to the last known appraised value of the property to estimate the current LTV. The Company's CECL loss calculation incorporates the refreshed LTV information to update the distribution of defaulted loans by LTV as well as the associated LGD for each LTV band. Reappraisals on a recurring basis at the individual property level are not considered cost-effective or necessary; however, reappraisals are performed on certain higher risk accounts to support line management activities, default servicing decisions, or when other situations arise for which, the Company believes the additional expense is warranted. FICO scores are refreshed quarterly, where possible. The indicators disclosed represent the credit scores for loans as of the date presented based on the most recent assessment performed. Residential mortgage and home equity financing receivables by LTV and FICO range are summarized as follows: As of March 31, 2024 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2024 (1) 2023 (1) 2022 2021 2020 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,747 $ 2,747 $ — <= 70% — — 189,887 1,019,015 867,980 2,504,019 4,580,901 — 70.01% - 110% — — 81,541 55,319 — 5,681 142,541 — Greater than 110% — — — — — 372 372 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 3,507 $ 3,507 $ — <600 — — 12,524 20,550 15,271 145,170 193,515 — 600-679 — — 21,964 47,937 31,063 220,680 321,644 — 680-759 — — 70,445 220,738 192,388 661,083 1,144,654 — >=760 — — 166,495 785,109 629,258 1,482,379 3,063,241 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — Current period gross write-offs - Residential mortgages $ — $ — $ — $ — $ — $ 12 $ 12 Home equity LTV ratios No LTV available (2) $ — $ — $ 1,714 $ 4,591 $ 4,418 $ 56,733 $ 67,456 $ 43,745 <= 70% — — 42,007 160,111 170,856 1,875,850 2,248,824 2,174,539 70.01% - 110% — — 3,883 1,409 — 11,602 16,894 14,133 Greater than 110% — — 621 154 — 1,132 1,907 1,907 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 FICO scores No FICO score available $ — $ — $ 724 $ 2,495 $ 2,631 $ 54,444 $ 60,294 $ 36,587 <600 — — 697 2,913 5,403 135,875 144,888 126,879 600-679 — — 1,915 9,421 9,460 227,775 248,571 231,058 680-759 — — 17,432 52,431 58,706 622,422 750,991 733,658 >=760 — — 27,457 99,005 99,074 904,801 1,130,337 1,106,142 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 Current period gross write-offs - home equity $ — $ — $ — $ — $ — $ 2,507 $ 2,507 (1) Loans originated during the three months ended March 31, 2024. The Company ceased origination of new residential mortgage and home equity loans in 2022. (2) Balances in the "No LTV available" or "No FICO score available" ranges primarily represent loans serviced by others, in run-off portfolios or for which a current LTV or FICO score is unavailable. (3) The ALLL model considers LTV for financing receivables in first lien position and CLTV for financing receivables in second lien position for the Company. (4) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) As of December 31, 2023 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2023 (1) 2022 2021 2020 2019 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,156 $ 2,156 $ — <= 70% — 190,214 1,024,024 880,476 590,828 1,977,309 4,662,851 — 70.01% - 110% — 83,925 61,624 — — 5,287 150,836 — Greater than 110% — — — — — 375 375 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 2,926 $ 2,926 $ — <600 — 9,909 15,601 13,053 30,094 109,302 177,959 — 600-679 — 20,516 43,327 32,157 51,103 189,585 336,688 — 680-759 — 83,098 256,737 202,173 160,961 517,085 1,220,054 — >=760 — 160,616 769,983 633,093 348,670 1,166,229 3,078,591 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — Current period gross write-offs - Residential mortgages $ — $ 33 $ 22 $ — $ 16 $ 182 $ 253 Home equity LTV ratios No LTV available (2) $ — $ 1,577 $ 3,904 $ 3,848 $ 3,747 $ 53,593 $ 66,669 $ 42,375 <= 70% — 43,661 168,205 179,258 230,879 1,737,887 2,359,890 2,285,157 70.01% - 110% — 3,742 1,968 — 23 13,630 19,363 16,576 Greater than 110% — 607 156 — — 1,769 2,532 2,532 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 FICO scores No FICO score available $ — $ 703 $ 2,471 $ 2,597 $ 3,328 $ 52,044 $ 61,143 $ 36,854 <600 — 430 2,774 3,942 6,652 126,607 140,405 123,232 600-679 — 3,

OPERATING LEASE ASSETS, NET

OPERATING LEASE ASSETS, NET	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
OPERATING LEASE ASSETS, NET	OPERATING LEASE ASSETS, NET The Company has operating leases, including leased vehicles, which are included in the Company's Condensed Consolidated Balance Sheets as Operating lease assets, net. Operating lease assets, net consisted of the following as of the periods indicated: (in thousands) March 31, 2024 December 31, 2023 Leased vehicles $ 17,064,556 $ 17,548,952 Less: accumulated depreciation (3,255,044) (3,546,875) Depreciated net capitalized cost $ 13,809,512 $ 14,002,077 Manufacturer subvention payments, net of accretion (636,292) (593,004) Unamortized origination fees and other costs 468,917 373,767 Leased vehicles, net $ 13,642,137 $ 13,782,840 Commercial equipment vehicles and aircraft, gross $ — $ — Less: accumulated depreciation — — Commercial equipment vehicles and aircraft, net $ — $ — Total operating lease assets, net $ 13,642,137 $ 13,782,840 The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of March 31, 2024 (in thousands): 2024 $ 1,629,446 2025 1,552,937 2026 810,714 2027 73,060 2028 74 Thereafter — Total $ 4,066,231 During the three months ended March 31, 2024, the Company recognized $22.8 million of net gains on the sale of operating lease assets that had been returned to the Company at the end of the lease term, compared to $22.4 million recognized during the three months ended March 31, 2023, respectively. These amounts are recorded within Miscellaneous income, net in the Company's Condensed Consolidated Statements of Operations.

GOODWILL AND OTHER INTANGIBLES

GOODWILL AND OTHER INTANGIBLES	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLES	GOODWILL AND OTHER INTANGIBLES Goodwill Goodwill is assigned to reporting units, which are operating segments or one level below an operating segment, as of the acquisition date. The following table presents the balance of the Company's goodwill by its reporting units for the periods indicated: (in thousands) Auto CBB C&I CRE CIB Total December 31, 2023 and March 31, 2024 $ 1,238,676 $ 159,027 $ 52,198 $ 1,015,130 $ 301,634 $ 2,766,665 During the three months ended March 31, 2024, there were no additions, re-allocations, impairments, or disposals of goodwill. During the first quarter of 2023, there was an immaterial adjustment to the value of goodwill acquired in connection with the 2022 acquisition of PCH. There were no other additions, re-allocations, impairments, or disposals of goodwill during the three months ended March 31, 2023. NOTE 5. GOODWILL AND OTHER INTANGIBLES (continued) T he Company evaluates goodwill for impairment at the reporting unit level. The Company conducted its last annual goodwill impairment tests as of October 1, 2023 using generally accepted valuation methods. As a result of that impairment test, no goodwill impairment was identified. Other Intangible Assets The following table details amounts related to the Company's intangible assets subject to amortization for the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Net Carrying Accumulated Net Carrying Accumulated Intangibles subject to amortization: Dealer networks $ 231,083 $ (238,917) $ 236,958 $ (233,042) Stellantis relationship 4,515 (134,235) 5,436 (133,314) Other intangibles 41,979 (50,325) 44,765 (47,539) Total intangibles subject to amortization $ 277,577 $ (423,477) $ 287,159 $ (413,895) At March 31, 2024 and December 31, 2023, the Company did not have any intangibles, other than goodwill, which were not subject to amortization. Amortization expense on intangible assets was $9.6 million and $10.4 million for the three months ended March 31, 2024 and 2023, respectively. The estimated aggregate amortization expense related to intangibles, excluding any impairment charges, for each of the five succeeding calendar years ending December 31 is: Year Calendar Year Amount Recorded To Date Remaining Amount To Record (in thousands) 2024 $ 37,900 $ 9,581 $ 28,319 2025 34,783 — 34,783 2026 32,492 — 32,492 2027 28,646 — 28,646 2028 26,340 — 26,340 Thereafter 126,997 — 126,997

OTHER ASSETS

OTHER ASSETS	3 Months Ended
	Mar. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
OTHER ASSETS	OTHER ASSETS The following is a detail of items that comprised Other assets at the peri ods indicated: (in thousands) March 31, 2024 December 31, 2023 Operating lease ROU assets $ 397,251 $ 435,633 Deferred tax assets 235,025 234,309 Accrued interest receivable 823,415 827,704 Derivative assets at fair value 1,160,331 1,090,194 Other real estate owned and other repossessed assets 288,997 291,280 Equity method investments 321,078 306,313 MSRs 95,776 94,266 Income tax receivables 428,316 478,305 Prepaid expense 257,089 242,273 Miscellaneous assets and receivables 880,298 583,607 Total Other assets $ 4,887,576 $ 4,583,884 Operating lease ROU assets We have operating leases for real estate and non-real estate assets. Real estate leases relate to office space and bank/lending retail branches. Non-real estate leases include disaster recovery centers, data centers, ATMs, vehicles and certain equipment leases. Real estate leases may include one or more options to renew, with renewal terms that can extend the lease term generally from one For the three months ended March 31, 2024 and 2023, operating lease expenses were $34.1 million and $43.0 million, respectively. Sublease income was $0.9 million and $1.0 million respectively, for the three months ended March 31, 2024 and 2023. These are reported within Occupancy and equipment expenses in the Company’s Condensed Consolidated Statements of Operations. NOTE 6. OTHER ASSETS (continued) Supplemental balance sheet information related to leases was as follows: Maturity of Lease Liabilities at March 31, 2024 Total Operating leases (in thousands) 2024 $ 103,668 2025 117,580 2026 89,377 2027 77,253 2028 43,490 Thereafter 95,084 Total lease liabilities $ 526,452 Less: Interest (42,083) Present value of lease liabilities $ 484,369 Supplemental Balance Sheet Information March 31, 2024 December 31, 2023 Operating lease ROU assets $397,251 $435,633 Other liabilities $484,369 $511,400 Weighted-average remaining lease term (years) 5.6 5.6 Weighted-average discount rate 3.1% 3.1% Three months ended March 31, Other Information 2024 2023 (in thousands) Operating cash flows from operating leases (1) $ (35,699) $ (38,391) Leased assets obtained in exchange for new operating lease liabilities $ 6,286 $ 14,257 (1) Activity is included within the net change in other liabilities on the SCF. The remainder of Other assets is comprised of: • Deferred tax asset - Refer to Note 15 of these Condensed Consolidated Financial Statements for more information on tax-related activities. • Accrued interest receivable - Includes accrued interest receivable on the Company's investments, loans, and other interest-earning portfolios. • Derivative assets at fair value - Refer to the "Offsetting of Financial Assets" table in Note 12 to these Condensed Consolidated Financial Statements for the detail of these amounts. • Equity method investments - The Company makes certain equity investments in various limited partnerships, some of which are considered VIEs, that invest in and lend to qualified community development entities, such as renewable energy investments, through the NMTC and CRA programs. The Company acts only in a limited partner capacity in connection with these partnerships, so the Company has determined that it is not the primary beneficiary of the partnerships because it does not have the power to direct the activities of the partnerships that most significantly impact the partnerships' economic performance. • MSRs - See further discussion on the valuation of the MSRs in Note 13. • Income tax receivables - Refer to Note 15 of these Condensed Consolidated Financial Statements for more information on tax-related activities. • OREO and other repossessed assets includes property and vehicles recovered through foreclosure and repossession. • Prepaid expenses includes advanced payments for cloud-based hosting, prepaid taxes, and outside services. •

VIEs

VIEs	3 Months Ended
	Mar. 31, 2024
Variable Interest Entity and Securitizations [Abstract]
VIEs	VIEs The Company transfers RICs and vehicle leases into newly-formed Trusts that then issue one or more classes of notes payable backed by the collateral. The Company’s continuing involvement with these Trusts is in the form of servicing the assets and, generally, through holding residual interests in the Trusts. The Trusts are considered VIEs under GAAP, and the Company may or may not consolidate these VIEs on its Condensed Consolidated Balance Sheets. The collateral and borrowings under credit facilities and securitization notes payable of the Company’s consolidated VIEs remain on the Condensed Consolidated Balance Sheets. The Company recognizes finance charges, fee income, and provisions for credit losses on the RICs, and leased vehicles and interest expense on the debt. Revolving credit facilities generally also utilize entities that are considered VIEs which are included on the Condensed Consolidated Balance Sheets. The Company also uses a titling trust to originate and hold its leased vehicles and the associated leases, for administrative efficiency and also to facilitate the pledging of leases to financing facilities or the sale of leases to other parties, without incurring the costs and administrative burden of retitling the leased vehicles. In this process, the leases may be transferred to separate legal units within the titling trust to segregate them for ownership purposes, including for securitizations. This does not result in any changes to the accounting for the leases. This titling trust is considered a VIE. Refer to Note 4 to these Condensed Consolidated Financial Statements for further information on the Company's leased vehicles. On-balance sheet VIEs The assets of consolidated VIEs are presented based upon the legal transfer of the underlying assets in order to reflect legal ownership. Certain of these assets can be used only to settle obligations of the consolidated VIEs and the liabilities of those entities for which creditors (or beneficial interest holders) do not have recourse to the Company's general credit. The assets and liabilities of consolidated VIEs included the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Assets Restricted cash $ 1,003,547 $ 864,464 LHFI 25,065,413 25,144,797 Operating lease assets, net (1) 13,642,137 13,782,840 Various other assets 701,005 637,987 Total Assets $ 40,412,102 $ 40,430,088 Liabilities Notes payable $ 25,699,422 $ 25,087,655 Various other liabilities 111,313 119,280 Total Liabilities $ 25,810,735 $ 25,206,935 ( 1) As noted above, all leased vehicles are originated through a titling trust. At March 31, 2024 and December 31, 2023, $7.0 billion and $7.8 billion, respectively, of leased vehicle assets included in this amount were in a titling trust, but not in a securitization trust. The Company retains servicing rights for receivables transferred to the Trusts and receives a monthly servicing fee on the outstanding principal balance. Supplemental fees, such as late charges, for servicing the receivables are reflected in Miscellaneous income, net. As of March 31, 2024 and December 31, 2023, the Company was servicing $29.4 billion and $28.7 billion, respectively, of gross RICs that have been transferred to consolidated Trusts. Certain amounts shown above are greater than the amounts shown in the corresponding line items in the accompanying Condensed Consolidated Balance Sheets due to intercompany eliminations between the VIEs and other entities consolidated by the Company. For example, for most of its securitizations, the Company retains one or more of the lowest tranches of bonds. Rather than showing investment in bonds as an asset and the associated debt as a liability, these amounts are eliminated in consolidation as required by GAAP. During the three month ended March 31, 2024, the company sold certain notes payable to third-party investors (for cash proceeds of $481.4 million) that it had previously retained from prior period securitization transactions of on-balance sheet VIEs. The company continues to consolidate these VIEs on its Condensed Consolidated Balance Sheet. NOTE 7. VIEs (continued) A summary of the cash flows received from the consolidated Trusts for the respective periods is as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 Assets securitized $ 5,234,923 $ 1,382,583 Net proceeds from new securitizations (1) $ 4,011,360 $ 792,050 Net proceeds on retained bonds from new securitizations 733,880 255,669 Cash received for servicing fees (2) 222,352 240,381 Net distributions from Trusts (2) 1,038,012 572,348 Total cash received from Trusts $ 6,005,604 $ 1,860,448 (1) Includes additional advances on existing securitizations. (2) These amounts are not reflected in the SCF because the cash flows are between the VIEs and other entities included in the consolidation. Off-balance sheet VIEs At March 31, 2024 and December 31, 2023, the Company was servicing gross RICs of $1.9 billion and $973.9 million, respectively, that have been sold in off-balance sheet securitizations and were subject to an optional clean-up call. During the three months ended March 31, 2024, the Company sold $1.1 billion of gross of RICs to a newly formed off-balance sheet securitization VIE which resulted in a pre-tax loss of $42.3 million. The company retained the servicing of the RIC's sold and provided a loan, classified by the Company as an investment in debt security HTM, in the amount of $53.0 million to the VIE to satisfy regulatory risk retention requirements. The company is not obligated to provide any financial support to the VIE. All of the notes and residual equity interests issued by the VIE were sold to third-party investors. Gains and losses on securitizations are recorded in Miscellaneous income, net, in the accompanying Condensed Consolidated Statements of Operations. At the time of the sale, the Company released approximately $96.0 million of ACL to provision expense. In November 2023, the Company sold all of the equity certificates of an on-balance sheet Trust to a new off-balance sheet Trust established in 2023. This new off-balance sheet Trust issued debt and equity tranches to third-party investors, with the exception of a 5% share of each new tranche purchased by the Company. In addition, the Company sold all of its debt that had been held from the on-balance sheet Trust to a third party. The Company’s sale of this debt and equity from the on-balance sheet Trust resulted in the Company no longer being identified as the primary beneficiary and the subsequent de-recognition of the assets and liabilities of the on-balance sheet Trust from its Condensed Consolidated Balance Sheets. As a result of these transactions, the Company recognized an immaterial loss in its Consolidated Statements of Operations. During the three months ended March 31, 2023, the Company sold no gross RICs to third-party investors in off-balance sheet securitizations and recorded no gain or loss on securitization. Gains and losses on securitizations are recorded in Miscellaneous income, net, in the accompanying Condensed Consolidated Statements of Operations. A summary of cash flows received from Trusts for the respective periods were as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 Receivables securitized (1) 1,060,931 — Net proceeds from new securitizations 1,003,695 — Cash received for servicing fees $ 1,344 $ 2,060 Total cash received from Trusts $ 1,005,039 $ 2,060 (1) Represents the UPB at the time of original securitization. NOTE 7. VIEs (continued) Other than repurchases of sold assets due to claims against standard representations and warranties, the Company's exposure to loss as a result of its involvement with these VIEs includes the portion of securitizations retained by the Company. The carrying value of this exposure at March 31, 2024 was $82.0 million and $4.6 million of debt and equity investments, respectively, compared to $29.7 million and $2.8 million at December 31, 2023. These amounts are reported in debt securities HTM and other investments, respectively, in Note 2 to these Condensed Consolidated Financial Statements. As discussed in Note 1 to these Condensed Consolidated Financial Statements, in December 2023 SBNA acquired a 20 percent interest in the Structured LLC for approximately $1.1 billion. The Company did not transfer any assets to the VIE and does not control nor consolidate it. SBNA's 20 percent interest is reported as an AFS debt security that has a fair value of approximately $1.1 billion and $1.1 billion at March 31, 2024 and December 31, 2023, respectively. As of March 31, 2024 SBNA serviced approximately $8.9 billion in multi-family loans for the Structured LLC and receives a market rate servicing fee. For the three months ended March 31, 2024, SBNA recognized $9.9 million in servicing fee income from the servicing of these assets which is recorded in Miscellaneous income, net, in the accompanying Condensed Consolidated Statements of Operations.

DEPOSITS AND OTHER CUSTOMER ACC

DEPOSITS AND OTHER CUSTOMER ACCOUNTS	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
DEPOSITS AND OTHER CUSTOMER ACCOUNTS	DEPOSITS AND OTHER CUSTOMER ACCOUNTS Deposits and other customer accounts are summarized as follows at the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Balance Percent of total deposits Balance Percent of total deposits Interest-bearing demand deposits $ 12,251,256 15.8 % $ 11,591,982 15.0 % Non-interest-bearing demand deposits 15,177,900 19.5 % 15,504,947 20.1 % Savings 4,213,934 5.4 % 4,428,281 5.7 % Customer repurchase accounts 240,728 0.3 % 238,523 0.3 % Money market 25,037,492 32.3 % 25,361,575 33.0 % CDs 20,763,160 26.7 % 19,947,868 25.9 % Total deposits (1) $ 77,684,470 100.0 % $ 77,073,176 100.0 % (1) Includes foreign deposits, as defined by the FRB, of $5.2 billion and $5.4 billion at March 31, 2024 and December 31, 2023, respectively. Demand deposit overdrafts that have been reclassified as loan balances were $186.7 million and $107.6 million at March 31, 2024 and December 31, 2023, respectively. At March 31, 2024 and December 31, 2023, the Company had $5.9 billion and $5.6 billion, respectively, of CDs greater than $250 thousand. The Company's subsidiaries had outstanding irrevocable letters of credit totaling $0.0 million and $40.0 million from the FHLB of Pittsburgh at March 31, 2024 and December 31, 2023, respectively, used to secure uninsured deposits placed with the Bank by state and local governments and their political subdivisions.

BORROWINGS

BORROWINGS	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
BORROWINGS	BORROWINGS Total borrowings and other debt obligations at March 31, 2024 were $43.9 billion, compared to $44.1 billion at December 31, 2023. The Company's debt agreements impose certain limitations on dividend payments and other transactions. The Company is currently in compliance with these limitations. During the three months ended March 31, 2024, the Company completed the public offering and sale of $1.0 billion in aggregate principal amount of its 6.17% fixed-to-floating rate senior notes due January 2030. The Company also completed on-balance sheet securitization transactions of $1.5 billion on its SDART platform, of which it retained approximately $332.4 million in interests in the VIE, and $1.1 billion on its DRIVE platform, of which it retained $164.0 million in interests in the VIE. The Company completed an on-balance sheet securitization transaction on its SBALT platform in the amount of $1.7 billion, of which it retained approximately $237.5 million in interests in the VIE. Additionally, the company sold certain notes payable to third-party investors (for cash proceeds of $481.4 million) that it had previously retained from prior period securitization transactions of on balance sheet VIEs. The company continues to consolidate these VIEs on its Condensed Consolidated Balance Sheet. In April 2024, the Company's auto business completed an on-balance sheet securitization transaction of $1.6 billion on its SDART platform, of which it retained approximately $134.4 million in interests in the VIE. NOTE 9. BORROWINGS (continued) Parent Company and other Subsidiary Borrowings and Debt Obligations The following table presents information regarding the Parent Company and its subsidiaries' borrowings and other debt obligations at the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Balance Effective Balance Effective Parent Company 3.50% senior notes due June 2024 (1) $ 999,813 3.50 % $ 999,559 3.50 % 3.45% senior notes due June 2025 998,634 3.45 % 998,329 3.45 % 4.26% senior notes due June 2025 499,842 4.43 % 499,634 4.43 % 4.50% senior notes due July 2025 1,099,104 4.50 % 1,098,937 4.50 % Senior notes due April 2026 (2) 433,464 6.01 % 433,450 6.02 % 5.81% senior sustainability notes due September 2026 499,212 5.92 % 499,082 5.92 % 3.24% senior notes due October 2026 932,325 3.24 % 930,768 3.24 % 6.89% senior notes due June 2027 (1) 750,000 6.89 % 750,000 6.89 % 4.40% senior notes due July 2027 1,049,651 4.40 % 1,049,641 4.40 % 2.49% senior notes due January 2028 997,776 2.57 % 997,582 2.57 % 6.50% senior notes due March 2029 996,758 6.59 % 996,580 6.59 % 6.57% senior notes due June 2029 498,130 6.67 % 498,034 6.67 % 6.17% senior notes due January 2030 996,259 6.26 % — — % 7.66% senior notes due November 2031 497,847 7.73 % 497,797 7.73 % 2.88% subordinated notes, due November 2031 (1) 500,000 2.88 % 500,000 2.88 % 7.18% subordinated notes due December 2032 (1) 500,000 7.18 % 500,000 7.18 % Total Parent Company borrowings 12,248,815 11,249,393 Subsidiaries Short-term borrowing due within one year, maturing thru March 2024 $ — — % $ 427,531 4.66 % Short-term borrowing due within one year, maturing thru June 2024 260,786 4.19 % — — % FHLB advances, maturing through April 2027 4,951,510 4.93 % 6,584,791 5.04 % Credit-linked notes due December 2031 (3) 74,156 3.81 % 89,812 3.51 % Credit-linked notes due May 2032 (4) 181,549 7.56 % 214,941 7.25 % Credit-linked notes due August 2032 (5) 160,484 9.60 % 188,282 9.12 % Credit-linked notes due December 2032 (6) 218,327 10.51 % 246,497 10.16 % Credit-linked notes due June 2033 (7) 80,822 10.59 % 89,787 10.26 % Credit Linked notes due December 2033 (8) 205,108 9.25 % 206,033 9.24 % Credit-linked notes due February 2052 (9) (11) 115,520 11.92 % 118,246 11.92 % 6.98% senior notes due October 2025 (1) 2,000,000 6.98 % 2,000,000 6.98 % Warehouse lines maturing through February 2026 (10) 3,371,578 7.61 % 3,618,378 6.93 % Secured structured financings maturing through December 2031 20,042,692 0.48% - 7.69% 19,110,360 0.48% - 7.69% Total subsidiary borrowings and other debt obligations 31,662,532 32,894,658 Total Parent Company and subsidiaries' borrowings and other debt obligations $ 43,911,347 $ 44,144,051 (1) These notes are payable to SHUSA's parent company, Santander. (2) These notes bear interest at a rate equal to the SOFR index rate plus 135 basis points per year. (3) Issued in December 2021 in the amount of $298.0 million. Notes are tied to the performance of a $2.0 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $36.0 million. (4) Issued in June 2022 in the amount of $521.5 million. Notes are tied to the performance of a $3.5 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $63.0 million. (5) Issued in September 2022 in the amount of $374.5 million. Notes are tied to the performance of a $3.5 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $63.0 million. (6) Issued in December 2022 in the amount of $388.4 million. Notes are tied to the performance of a $3.6 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $65.3 million. (7) Issued in June 2023 in the amount of $115.5 million. Notes are tied to the performance of a $1.1 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $22.0 million. (8) Issued in December 2023 in the amount of $207.8 million. Notes are tied to the performance of a $2.1 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $62.3 million. (9) Issued in January 2023 in the amount of $131.6 million. Notes are tied to the performance of a $2.5 billion original reference pool of SBNA residential mortgage loans. The contractual residual amount is $5.1 million. (10) Benchmark rates used included commercial paper, daily simple SOFR, one-month term SOFR, and three-month term SOFR. (11) Variable rate notes issued in tranches that bear interest at a rate equal to SOFR index plus varying spreads ranging from 4.15% to 13.90% and reset monthly. NOTE 9. BORROWINGS (continued) Credit-Linked Notes Credit-linked notes transfer credit risk on a reference pool of loans to the purchaser of the notes. In the event of credit losses on the reference pool in excess of the contractual residual amount, the principal balance of the notes will be reduced to the extent of such loss up to the amount of notes issued and recognized as a debt extinguishment gain within Miscellaneous income, net. The Company has the option to redeem the notes once the UPB of the reference pool is less than or equal to 10% of the initial principal balance. In connection with certain of its credit linked notes, the Company is required to maintain a letter of credit, as well as a collateral account with a third-party financial institution, with the amount equal to at least the outstanding balances of the transaction’s credit-linked notes. This is reported as restricted cash in the Condensed Consolidated Financial Statements. Warehouse Lines The following tables present information regarding the Company's warehouse lines at the dates indicated: March 31, 2024 (dollars in thousands) Balance Committed Amount Effective Assets Pledged Restricted Cash Pledged Warehouse line due April 2025 $ 250,700 $ 1,000,000 8.25 % $ 396,342 $ — Warehouse line due July 2025 273,000 600,000 7.07 % 326,067 3,236 Warehouse line due July 2025 26,200 500,000 12.41 % 38,594 — Warehouse line due October 2025 927,100 2,100,000 6.26 % 1,332,501 64 Warehouse line due November 2025 483,000 500,000 4.09 % 677,604 — Warehouse line due January 2026 999,500 1,000,000 10.82 % 1,450,629 2,598 Warehouse line due February 2026 412,078 700,000 6.59 % 611,351 506 Total credit facilities $ 3,371,578 $ 6,400,000 7.61 % $ 4,833,088 $ 6,404 The warehouse lines and repurchase facilities are fully collateralized by a designated portion of the Company's RICs, leased vehicles, securitization notes payable, and residuals retained by the Company. Secured Structured Financings The following tables present information regarding the Company's secured structured financings at the dates indicated: March 31, 2024 (dollars in thousands) Balance Initial Note Amounts Issued (3) Initial Weighted Average Interest Rate Range Collateral (2) Restricted Cash Public securitizations maturing on various dates through December 2031 (1) $ 17,109,213 $ 45,365,875 0.48% - 7.69% $ 26,620,341 $ 994,399 Privately issued amortizing notes maturing on various dates through August 2030 (3) 2,933,479 7,350,027 2.17% - 6.73% 4,827,740 2,742 Total secured structured financings $ 20,042,692 $ 52,715,902 0.48% - 7.69% $ 31,448,081 $ 997,141 (1) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (2) Secured structured financings may be collateralized by collateral overages of other issuances. (3) Excludes securitizations which no longer have outstanding debt and excludes any incremental borrowings.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS)	ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) The following table presents the components of AOCI / (loss), net of related tax, for the periods indicated. Total Other Total Accumulated Three months ended March 31, 2024 December 31, 2023 March 31, 2024 (in thousands) Pre-tax Tax Net Activity Beginning Net Ending Net unrealized (losses)/gains on cash flow hedge derivative financial instruments 67,037 (15,738) 51,299 $ (254,519) $ 51,299 $ (203,220) Net unrealized (losses)/gains on investments in debt securities 18,594 (6,955) 11,639 (790,551) 11,639 (778,912) Pension and post-retirement actuarial gain / (loss) (3) 247 (64) 183 (20,498) 183 (20,315) As of March 31, 2024 $ 85,878 $ (22,757) $ 63,121 $ (1,065,568) $ 63,121 $ (1,002,447) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statements of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statements of Operations for the sale of debt securities. (3) Included in the computation of net periodic pension costs. Total Other Total Accumulated Three months ended March 31, 2023 December 31, 2022 March 31, 2023 (in thousands) Pre-tax Tax Net Activity Beginning Net Ending Change in AOCI on cash flow hedge derivative financial instruments $ 120,728 $ (34,858) $ 85,870 Reclassification adjustment for net (gains)/losses on cash flow hedge derivative financial instruments (1) 3,856 (757) 3,099 Net unrealized gains/(losses) on cash flow hedge derivative financial instruments 124,584 (35,615) 88,969 $ (515,664) $ 88,969 $ (426,695) Change in unrealized (losses)/gains on investments in debt securities 25,602 (24,072) 1,530 Reclassification adjustment for net (gains)/losses included in net income/(expense) on debt securities AFS (2) 36,960 (7,255) 29,705 Net unrealized gains/(losses) on investments in debt securities 62,562 (31,327) 31,235 (796,572) 31,235 (765,337) Pension and post-retirement actuarial gain / (loss) (3) 655 (170) 485 (23,787) 485 (23,302) As of March 31, 2023 $ 187,801 $ (67,112) $ 120,689 $ (1,336,023) $ 120,689 $ (1,215,334)

SECURITIES FINANCING ACTIVITIES

SECURITIES FINANCING ACTIVITIES	3 Months Ended
	Mar. 31, 2024
Banking and Thrift, Other Disclosure [Abstract]
SECURITIES FINANCING ACTIVITIES	SECURITIES FINANCING ACTIVITIES The Company may enter into Securities Financing Activities primarily to deploy the Company’s excess cash and investment positions. Securities Financing Activities are treated as collateralized financings and are included i n "F ederal funds sold and securities purchased under resale agreements or similar arrangements" an d "Federal funds purchased and securities loaned or sold under repurchase agreements" on the Company’s Condensed Consolidated Balance Sheets . Refer to Note 1 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for 2023 for further discussion of accounting for and the offsetting of securities financing assets and liabilities. The Company has elected the FVO for certain of its Securities Financing Activities. Refer to Note 13 to these Condensed Consolidated Financial Statements for the amounts recorded at FVO. Securities borrowed and purchased under agreements to resell, at their respective carrying values, consisted of the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Securities purchased under agreements to resell $ 7,628,806 $ 8,617,309 Securities borrowed 1,837,001 1,621,405 Total $ 9,465,807 $ 10,238,714 Securities loaned or sold under agreements to repurchase, at their respective carrying values, consisted of the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Securities sold under agreements to repurchase $ 16,164,434 $ 16,290,761 Securities lending 17 25 Total $ 16,164,451 $ 16,290,786 Securities Financing Activities are generally executed under standard industry agreements, including master agreements that create a single contract under which all transactions between two counterparties are executed, allowing for trade aggregation of receivables and payables into a single net payment or settlement. The amounts of securities financing assets or liabilities qualified for offset in the Condensed Consolidated Balance Sheets were as follows for the dates indicated. March 31, 2024 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 53,209,700 $ (45,580,894) $ 7,628,806 Securities borrowed 1,837,001 — 1,837,001 Total $ 55,046,701 $ (45,580,894) $ 9,465,807 March 31, 2024 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 61,745,328 $ (45,580,894) $ 16,164,434 Securities lending 17 — 17 Total $ 61,745,345 $ (45,580,894) $ 16,164,451 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. NOTE 11. SECURITIES FINANCING ACTIVITIES (continued) December 31, 2023 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 41,237,731 $ (32,620,422) $ 8,617,309 Securities borrowed 1,621,405 — 1,621,405 Total $ 42,859,136 $ (32,620,422) $ 10,238,714 December 31, 2023 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 48,911,183 $ (32,620,422) $ 16,290,761 Securities lending 25 — 25 Total 48,911,208 (32,620,422) 16,290,786 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. The following tables present the gross amounts of liabilities associated with Securities Financing Activities by remaining contractual maturity as of the date indicated: March 31, 2024 (in thousands) Open and overnight Up to 30 days 31-90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 28,748,667 $ 10,211,955 $ 13,625,513 $ 9,159,193 $ 61,745,328 Securities lending 17 — — — 17 Total $ 28,748,684 $ 10,211,955 $ 13,625,513 $ 9,159,193 $ 61,745,345 The following tables present the gross amounts of liabilities associated with Securities Financing Activities by class of underlying collateral as of the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Repurchase agreements Securities lending Total Repurchase agreements Securities lending Total U.S. Treasury $ 35,424,614 $ — $ 35,424,614 $ 29,251,978 $ — $ 29,251,978 Residential agency MBS 24,267,322 — 24,267,322 17,532,972 — 17,532,972 Corporate and other securities 2,053,392 17 2,053,409 2,126,233 25 2,126,258 Total $ 61,745,328 $ 17 $ 61,745,345 $ 48,911,183 $ 25 $ 48,911,208

DERIVATIVES

DERIVATIVES	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES General Derivatives represent contracts between parties that usually require little or no initial net investment and result in one or both parties delivering cash or another type of asset to the other party based on a notional amount and an underlying asset, index, interest rate or future purchase commitment or option as specified in the contract. Derivative transactions are often measured in terms of notional amount, but this amount is generally not exchanged, is not recorded on the balance sheet, and does not represent the Company`s exposure to credit loss. The notional amount is the basis on which the financial obligation of each party to the derivative contract is calculated to determine required payments under the contract. The Company controls the credit risk of its derivative contracts through credit approvals, limits and monitoring procedures. The underlying variable is typically a referenced interest rate (commonly the OIS rate or a SOFR-based rate), security, credit spread or index. The Company’s capital markets and mortgage banking activities are subject to price risk. The Company employs various tools to measure and manage price risk in its portfolios. In addition, the Board of Directors has established certain limits relative to positions and activities. The level of price risk exposure at any given time depends on the market environment and expectations of future price and market movements and will vary from period to period. See Note 13 to these Condensed Consolidated Financial Statements for discussion of the valuation methodology for derivative instruments. Credit Risk Contingent Features The Company has entered into certain derivative contracts that require the posting of collateral to counterparties when those contracts are in a net liability position. The amount of collateral to be posted is based on the amount of the net liability and thresholds generally related to the Company's long-term senior unsecured credit ratings. In a limited number of instances, counterparties also have the right to terminate their ISDA Master Agreements if the Company's ratings fall below a specified level, typically investment grade. As of March 31, 2024, derivatives in this category had a fair value of $0.1 million. The credit ratings of the Company and SBNA are currently considered investment grade. As of March 31, 2024, no additional collateral would be required if there were a further 1- or 2- notch downgrade by either S&P or Moody's. As of March 31, 2024 and December 31, 2023, the aggregate fair value of all derivative contracts with credit risk contingent features (i.e., those containing collateral posting or termination provisions based on the Company's ratings) that were in a net liability position totaled $11.0 million and $11.1 million, respectively. The Company had $11.5 million and $15.3 million in cash and securities collateral posted to cover those positions as of March 31, 2024 and December 31, 2023, respectively. Hedge Accounting Management uses derivative instruments designated as hedges to mitigate the impact of interest rate and foreign exchange rate movements on the fair value of certain assets and liabilities and on highly probable forecasted cash flows. These instruments primarily include interest rate swaps that have underlying interest rates based on key benchmark indices. The nature and volume of the derivative instruments used to manage interest rate risk depend on the level and type of assets and liabilities on the balance sheet and the risk management strategies for the current and anticipated interest rate environment. Interest rate swaps are generally used to convert fixed-rate assets and liabilities to variable rate assets and liabilities and vice versa. The Company utilizes interest rate swaps that have a high degree of correlation to the related financial instrument. Fair Value Hedges The Company enters into derivatives to hedge the risk of changes in fair value of a portion of its AFS debt securities portfolio. These derivatives are designated as fair value hedges at inception. The gains/(losses) from changes in the fair value of the hedging derivative and the offsetting gains/(losses) from changes in the fair value of the related underlying hedged items due to the hedged risk are reporting in the same line item in the Condensed Consolidated Statements of Operations as earnings from the hedged items. The cumulative fair value hedge basis adjustments included in the carrying amount of hedged assets is reversed through earnings in future periods as an adjustment to yield. The Company includes gains/(losses) on the hedging derivatives and the related hedged items in the assessment of hedge effectiveness. All of these swaps have been deemed highly effective fair value hedges. The last of the hedges is scheduled to expire in February 2030. The Company has entered into fair value hedges of portions of a closed portfolio of approximately $2.8 billion of AFS debt securities, using the portfolio layer method. NOTE 12. DERIVATIVES (continued) The carrying amount and fair value hedge adjustment of hedged assets at the dates indicated was: Carrying Amount of Hedged Assets Amount of Fair Value Hedge Adjustment Included in the Carrying Amount March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Debt securities AFS (Note 2) $ 2,243,603 $ 2,463,991 $ 81,397 $ 36,009 Cash Flow Hedges The Company has outstanding interest rate swap agreements designed to hedge a portion of the Company’s floating-rate assets and liabilities and forecasted issuances of borrowed funds. The Company also has foreign exchange contracts designed to hedge certain contractual payments in foreign currencies. All of these derivatives have been deemed highly effective cash flow hedges. The gain or loss on the derivative instrument is reported as a component of AOCI and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings and is presented in the same Condensed Consolidated Statements of Operations line item as the earnings effect of the hedged item. The last of the hedges is scheduled to expire in December 2028. The Company includes all components of each derivative's gain or loss in the assessment of hedge effectiveness. As of March 31, 2024, the Company estimated that approximately $83.7 million of unrealized losses included in AOCI would be reclassified to earnings during the subsequent twelve months as the future cash flows occur. Derivatives Designated in Hedge Relationships – Notional and Fair Values Derivatives designated as accounting hedges included the following as of the dates indicated: (dollars in thousands) Notional Asset Liability Weighted Average Receive Rate Weighted Average Pay Weighted Average Life March 31, 2024 Fair value hedges: Cross-currency swaps $ 18,766 $ 170 $ 2,475 5.91 % 9.90 % 3.58 Interest rate swaps 6,475,000 66,761 — 2.75 % 3.48 % 2.77 Cash flow hedges: Pay fixed - receive variable interest rate swaps $ 5,559,350 $ 60,926 $ — 3.24 % 3.81 % 2.52 Pay variable - receive fixed interest rate swaps 11,075,000 4,245 333,523 1.96 % 1.84 % 1.21 Foreign exchange 20,000 — 226 — % — % 0.08 Total $ 23,148,116 $ 132,102 $ 336,224 2.49 % 2.78 % 1.96 December 31, 2023 Fair value hedges: Cross-currency swaps $ 18,766 $ 192 $ 2,235 5.91 % 9.90 % 3.83 Interest rate swaps 6,650,000 38,712 7,716 2.02 % 3.46 % 3.01 Cash flow hedges: Pay fixed — receive variable interest rate swaps $ 3,422,700 $ 22,935 $ 120 5.38 % 3.82 % 2.53 Pay variable - receive fixed interest rate swaps 11,925,000 13,575 362,018 1.83 % 1.64 % 1.30 Interest rate floor 250,000 — — — % — % 0.04 Total $ 22,266,466 $ 75,414 $ 372,089 2.41 % 2.51 % 1.99 NOTE 12. DERIVATIVES (continued) Other Derivative Activities The Company also enters into derivatives that are not designated as accounting hedges under GAAP. Although these derivatives are used to hedge risk and are considered economic hedges, they are not designated as accounting hedges because the contracts they are hedging are often carried at fair value on the balance sheet, resulting in generally symmetrical accounting treatment for the hedging instrument and the hedged item. Customer-related derivatives The Company offers derivatives to its customers in connection with their risk management requirements related to foreign exchange and lending arrangements. These derivatives primarily consist of interest rate swaps, caps, floors, and foreign exchange contracts. Risk exposure from customer positions is managed through offsetting transactions with other dealers, including Santander. Refer to Note 17 for related party transactions. Broker dealer activities The Company uses exchange-traded options and futures, credit default swaps, and forward-settling securities trades as part of its trading business, as well as to actively manage risk exposures that arise from its trading in cash instruments. Structured financing activities In certain circumstances, the Company is required to hedge its interest rate risk on revolving credit and term borrowings related to its secured structured financings. The Company uses interest rate caps to satisfy these requirements and enters into offsetting option contracts. Foreign exchange activities The Company uses foreign exchange contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities. Foreign exchange contracts, which include spot and forward contracts as well as cross-currency swaps, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date and may or may not be physically settled depending on the Company’s needs. Exposure to gains and losses on these contracts increase or decrease over their respective lives as currency exchange and interest rates fluctuate. Mortgage Banking Derivatives The Company typically retains the servicing rights related to residential mortgage loans that are sold. Most of the Company`s residential MSRs are accounted for at fair value. As deemed appropriate, the Company economically hedges MSRs using interest rate swaps and forward contracts to purchase MBS. Other derivative activities Other derivative instruments primarily include forward contracts related to certain investment securities sales, loan sales, an OIS, and a total return swap on Visa, Inc. Class B common shares. NOTE 12. DERIVATIVES (continued) Derivatives Not Designated in Hedge Relationships – Notional and Fair Values Other derivative activities included the following as of the dates indicated: Notional Asset derivatives Liability derivatives (in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Mortgage banking derivatives: Total mortgage banking risk management 662,000 662,000 16,454 14,634 35,429 31,304 Customer-related derivatives: Swaps receive fixed 14,931,634 15,017,998 2,903 26,731 793,390 687,505 Swaps pay fixed 14,984,936 15,005,503 812,882 708,642 3,876 26,366 Other 7,942,342 8,691,978 58,425 93,439 56,824 91,602 Total customer-related derivatives 37,858,912 38,715,479 874,210 828,812 854,090 805,473 Other derivative activities: Foreign exchange contracts 10,244,954 11,518,594 50,793 54,722 50,381 62,842 Interest rate swap agreements 100 2,400,100 7 — — 2 Interest rate cap agreements 1,814,427 2,313,672 67,732 76,019 — — Options for interest rate cap agreements 1,814,427 2,313,672 — — 67,732 76,019 Other 54,709,920 48,543,537 51,216 42,657 71,136 126,968 Total $ 107,104,740 $ 106,467,054 $ 1,060,412 $ 1,016,844 $ 1,078,768 $ 1,102,608 NOTE 12. DERIVATIVES (continued) Gains (Losses) on All Derivatives The following Condensed Consolidated Statements of Operations line items were impacted by the Company’s derivative activities for the periods indicated: (in thousands) Three months ended March 31, Line Item 2024 2023 Fair value hedges: Cross-currency swaps Net interest income $ (190) $ (830) Interest rate swaps Net interest income 12,888 5,400 Derivative Activity (1) Cash flow hedges: Pay fixed-receive variable interest rate swaps Interest expense on borrowings 12,926 (3,468) Pay variable receive-fixed interest rate swap Interest income on loans (95,381) (101,917) Interest rate floors Interest income on loans (46) (436) Other derivative activities: Mortgage banking derivatives Non Interest income (4,210) 2,383 Customer-related derivatives Non interest income 10,377 17,057 Foreign exchange Non interest income (6,306) (10,281) Interest rate swaps, caps, and options Non interest income 24,522 (694) Other Non interest income 25,348 (57,558) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected. The net amount of change recognized in OCI for cash flow hedge derivatives were gains of $51.3 million, and $85.9 million, net of tax, for the three months ended March 31, 2024, and 2023, respectively. The net amount of changes reclassified from OCI into earnings for cash flow hedge derivatives were losses of zero, and $3.1 million, net of tax, for the three months ended March 31, 2024, and 2023, respectively. Disclosures about Offsetting Assets and Liabilities The Company enters into legally enforceable master netting agreements which reduce risk by permitting netting of transactions with the same counterparty on the occurrence of certain events. A master netting agreement allows two counterparties the ability to net-settle amounts under all contracts, including any related collateral posted, through a single payment and in a single currency. The right to offset and certain terms regarding the collateral process, such as valuation, credit events and settlement, are contained in the applicable master agreement. The Company's financial instruments, including resell and repurchase agreements, securities lending arrangements, derivatives, and cash collateral, may be eligible for offset on its Condensed Consolidated Balance Sheets. The Company has elected to present derivative balances on a gross basis even if the derivative is subject to a legally enforceable nettable ISDA Master Agreement for all trades executed after April 1, 2013. Collateral that is received or pledged for these transactions is disclosed within the “Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets” section of the tables below. NOTE 12. DERIVATIVES (continued) Information about financial assets and liabilities that are eligible for offset on the Condensed Consolidated Balance Sheets was as follows for the dates indicated: Offsetting of Financial Assets Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets Collateral Received (2) Net Amount March 31, 2024 Fair value hedges $ 66,931 $ — $ 66,931 $ (32,121) $ 34,810 Cash flow hedges 65,171 — 65,171 (62,168) 3,003 Other derivative activities (1) 1,060,412 (32,183) 1,028,229 (290,159) 738,070 Total Derivative Assets $ 1,192,514 $ (32,183) $ 1,160,331 $ (384,448) $ 775,883 December 31, 2023 Fair value hedges $ 38,904 $ — $ 38,904 $ (11,300) $ 27,604 Cash flow hedges 36,510 — 36,510 (22,935) 13,575 Other derivative activities (1) 1,016,844 (2,064) 1,014,780 (170,835) 843,945 Total Derivative Assets $ 1,092,258 $ (2,064) $ 1,090,194 $ (205,070) $ 885,124 (1) Includes customer-related and other derivatives. (2) Collateral received includes cash, cash equivalents, and other financial instruments. Cash collateral received is reported in Other liabilities, as applicable, in the Condensed Consolidated Balance Sheets. Financial instruments that are pledged to the Company are not reflected in the accompanying Condensed Consolidated Balance Sheets since the Company does not control or have the ability to re-hypothecate these instruments. Offsetting of Financial Liabilities Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets Collateral Pledged (2) Net Amount March 31, 2024 Fair value hedges $ 2,475 $ — $ 2,475 $ (1,171) $ 1,304 Cash flow hedges 333,749 — 333,749 (139,635) 194,114 Other derivative activities (1) 1,078,768 (32,133) 1,046,635 (94,057) 952,578 Total Derivative Liabilities $ 1,414,992 $ (32,133) $ 1,382,859 $ (234,863) $ 1,147,996 December 31, 2023 Fair value hedges $ 9,951 $ — $ 9,951 (1,064) $ 8,887 Cash flow hedges 362,138 — 362,138 $ (140,968) 221,170 Other derivative activities (1) 1,102,608 (2,014) 1,100,594 (129,722) 970,872 Total Derivative Liabilities $ 1,474,697 $ (2,014) $ 1,472,683 $ (271,754) $ 1,200,929 (1) Includes customer-related and other derivatives. (2) Cash collateral pledged and financial instruments pledged is reported in Other assets in the Condensed Consolidated Balance Sheets. In certain instances, the Company is over-collateralized since the actual amount of collateral pledged exceeds the associated financial liability. As a result, the actual amount of collateral pledged that is reported in Other assets may be greater than the amount shown in the table above.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE The Company estimates the fair value of certain assets and liabilities for both measurement and disclosure purposes. The fair value hierarchy categorizes the underlying assumptions and inputs to valuation techniques that are used to measure fair value into three levels as follows: • Level 1 inputs are quoted prices in active markets for identical assets or liabilities that can be accessed as of the measurement date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. • Level 2 inputs are those other than quoted prices included in Level 1 that are observable for the assets or liabilities, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active. • Level 3 inputs are those that are unobservable or not readily observable for the asset or liability and are used to measure fair value to the extent relevant observable inputs are not available. Assets and liabilities measured at fair value, by their nature, result in a higher degree of financial statement volatility. See Note 1 for a broad discussion of fair value measurement techniques. When available, the Company uses quoted market prices or mat rix pricing in active markets to determine fair value and classifies such items as Level 1 or Level 2 assets or liabilities. If quoted market prices in active markets are not available, fair value is determin ed using third-party broker quotes and/or DCF models incorporating various assumptions including interest rates, prepayment speeds and credit losses. Assets and liabilities valued using broker quotes and/or DCF models are classified as either Level 2 or Level 3, depending on the lowest level classification of an input that is considered significant to the overall valuation. The Company values assets and liabilities based on the principal market in which each would be sold (in the case of assets) or transferred (in the case of liabilities). The principal market is the forum with the greatest volume and level of activity. In the absence of a principal market, the valuation is based on the most advantageous market. In the absence of observable market transactions, the Company considers liquidity valuation adjustments to reflect the uncertainty in pricing the instruments. The fair value of a financial asset is measured on a stand-alone basis and cannot be measured as a group, with the exception of certain financial instruments held and managed on a net portfolio basis. In measuring the fair value of a nonfinancial asset, the Company assumes the highest and best use of the asset by a market participant, not just the intended use, to maximize the value of the asset. The Company also considers whether any credit valuation adjustments are necessary based on the counterparty's credit quality. Any models used to determine fair values or validate dealer quotes based on the descriptions below are subject to review and testing as part of the Company's model validation and internal control testing processes. NOTE 13. FAIR VALUE (continued) The Company's Market Risk Department approves the methodologies used in the estimations of fair value, including the Company's Level 3 assets and liabilities. Price validation procedures are performed, and the results are reviewed for Level 3 assets and liabilities by the Market Risk Department. Price validation procedures performed for these assets and liabilities can include comparing current prices to historical pricing trends by collateral type and vintage, comparing prices by product type to indicative pricing grids published by market makers, and obtaining corroborating dealer prices for significant securities. The Company reviews the assumptions utilized to determine fair value on a quarterly basis. Any changes in methodologies or significant inputs used in determining fair values are further reviewed to determine if a change in fair value level hierarchy has occurred. At December 31, 2023, the beneficial interest in the Structured LLC was determined to be Level 2 based on observed market execution. As a result of moving further from the purchase date and observed market execution, the Company is relying on a DCF method going forward for valuation. As a result, the $1.1 billion beneficial interest in the Structured LLC has transferred from Level 2 to Level 3. Assets and Liabilities Measured at Fair Value on a Recurring Basis The following tables present the assets and liabilities that are measured at fair value on a recurring basis by major product category and fair value hierarchy as of the dates indicated: (in thousands) Level 1 Level 2 Level 3 Balance at March 31, 2024 Level 1 Level 2 Level 3 Balance at December 31, 2023 Financial assets: U.S. Treasury securities $ 226,359 $ — $ — $ 226,359 $ 25,409 $ — $ — $ 25,409 Corporate debt — 2,130 — 2,130 — 31,590 — 31,590 ABS — 549,739 — 549,739 — 510,663 — 510,663 Beneficial interest in Structured LLC — — 1,082,349 1,082,349 — 1,122,510 — 1,122,510 MBS — 5,230,937 — 5,230,937 — 5,349,365 — 5,349,365 Investment in debt securities AFS (2) $ 226,359 $ 5,782,806 $ 1,082,349 $ 7,091,514 $ 25,409 $ 7,014,128 $ — $ 7,039,537 Trading securities 1,593,249 7,404,215 6,148 9,003,612 1,637,908 6,329,031 936 7,967,875 Federal funds sold and securities purchased under resale agreements or similar arrangements — 604,292 — 604,292 — 2,112,292 — 2,112,292 RICs HFI (3) — — 12,494 12,494 — — 13,888 13,888 LHFS (1)(4) — 535,373 — 535,373 — 19,464 — 19,464 MSRs — — 95,776 95,776 — — 94,266 94,266 Other assets - derivatives (2) 586 1,159,713 32 1,160,331 4,807 1,085,333 54 1,090,194 Total financial assets (5) $ 1,820,194 $ 15,486,399 $ 1,196,799 $ 18,503,392 $ 1,668,124 $ 16,560,248 $ 109,144 $ 18,337,516 Financial liabilities: Federal funds purchased and securities loaned or sold under repurchase agreements $ — $ 362,103 $ — $ 362,103 $ — $ 595,414 $ — $ 595,414 Trading liabilities 2,665,439 295,178 — 2,960,617 2,371,823 327,293 384 2,699,500 Other liabilities - derivatives (2) 134 1,382,360 365 1,382,859 5,914 1,466,119 650 1,472,683 Total financial liabilities $ 2,665,573 $ 2,039,641 $ 365 $ 4,705,579 $ 2,377,737 $ 2,388,826 $ 1,034 $ 4,767,597 (1) LHFS disclosed on the Condensed Consolidated Balance Sheets also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (2) Refer to Note 2 for the fair value of investment securities and to Note 12 for the fair values of derivative assets and liabilities on a further disaggregated basis. (3) RICs collateralized by vehicle titles at SC and RV/marine loans at SBNA. (4) Residential mortgage loans and commercial mortgage loans. (5) Approximately $1.2 billion of these financial assets were measured using model-based techniques, or Level 3 inputs, and represented approximately 6.5% of total assets measured at fair value on a recurring basis and approximately 0.7% of total consolidated assets. NOTE 13. FAIR VALUE (continued) Valuation Processes and Techniques - Recurring Fair Value Assets and Liabilities The following is a description of the valuation techniques used for instruments measured at fair value on a recurring basis: Investments in debt securities AFS Investments in debt securities AFS are accounted for at fair value. The Company utilizes a third-party pricing service to value its investment securities portfolios on a global basis. Its primary pricing service has consistently proved to be a high quality third-party pricing provider. For those investments not valued by pricing vendors, other trusted market sources are utilized. The Company monitors and validates the reliability of vendor pricing on an ongoing basis, which can include pricing methodology reviews, performing detailed reviews of the assumptions and inputs used by the vendor to price individual securities, and price validation testing. Price validation testing is performed independently of the risk-taking function and can include corroborating the prices received from third-party vendors with prices from another third-party source, reviewing valuations of comparable instruments, comparison to internal valuations, or by reference to recent sales of similar securities. The classification of securities within the fair value hierarchy is based upon the activity level in the market for the security type and the observability of the inputs used to determine their fair values. Actively traded quoted market prices for debt securities AFS, such as government agency securities, corporate debt, state and municipal securities, and MBS, are not readily available. The Company's principal markets for its investment securities are the secondary institutional markets with an exit price that is predominantly reflective of bid-level pricing in these markets. These investment securities are priced by third-party pricing vendors. The third-party vendors use a variety of methods when pricing these securities that incorporate relevant observable market data to arrive at an estimate of what a buyer in the marketplace would pay for a security under current market conditions. These investment securities are, therefore, considered Level 2. Certain ABS are valued using DCF models. The DCF models are obtained from a third-party pricing vendor which uses observable market data and therefore are classified as Level 2. The Company's beneficial interest in the Structured LLC was acquired in December 2023, and is valued using an internally-developed DCF model and is classified as Level 3 at March 31, 2024. Significant assumptions used in evaluation include, discount rate, loss severity rate, and extension of loans. Significant changes in any of these inputs could result in a higher or lower fair value measurement. Securities Financing Activities No quoted prices exist for Securities Financing Activities, so fair value is determined using a DCF technique. Cash flows are estimated based on the terms of the contract. These cash flows are discounted using interest rates appropriate to the maturity of the instrument as well as the nature of the underlying collateral. Securities Financing Activities are classified as Level 2. LHFI For certain RICs reported in LHFI, net, the Company has elected the FVO. The estimated fair value of all RICs HFI is estimated using a DCF model and is classified as Level 3. LHFS For certain LHFS portfolios, the Company has elected the FVO and the portfolios are measured at fair value on a recurring basis. These loans consisted primarily of loans attributed to CIB whole loan aggregation and bridge lending programs. The fair value of these loans was based on estimated market rates for similar loans and certain forward sale agreements and the loans are considered Level 2. See further discussion below in the section captioned "FVO for Financial Assets and Financial Liabilities." NOTE 13. FAIR VALUE (continued) MSRs The Company maintains an MSR asset accounted for at fair value for sold residential real estate loans serviced for others. At March 31, 2024 and December 31, 2023, the balance of these loans serviced for others was $8.1 billion and $8.3 billion, respectively. Changes in fair value of the MSR are recorded through Miscellaneous income, net on the Condensed Consolidated Statements of Operations. The Company has elected to measure its residential MSRs at fair value to be consistent with the risk management strategy to hedge changes in the fair value of these assets. The fair value of residential MSRs is estimated by using a cash flow valuation model which calculates the present value of estimated future net servicing cash flows, taking into consideration actual and expected mortgage loan prepayment rates, discount rates (reflective of a market participant’s return on an investment for similar assets), servicing costs, and other economic factors which are determined based on current market conditions. Historically, servicing costs and discount rates have been less volatile than prepayment rates, which are directly correlated with changes in market interest rates. Increases in prepayment rates, discount rates and servicing costs result in lower valuations of MSRs. Decreases in the anticipated earnings rate on escrow and similar balances result in lower valuations of MSRs. Assumptions incorporated into the residential MSR valuation model reflect management's best estimate of factors that a market participant would use in valuing the residential MSRs, as well as future expectations. Although sales of residential MSRs do occur, residential MSRs do not trade in an active market with readily observable prices. As deemed appropriate, the Company economically hedges MSRs using interest rate swaps and forward contracts to purchase MBS. See further discussion on these derivative activities in Note 12 to these Condensed Consolidated Financial Statements. As a benchmark for the reasonableness of the residential MSRs' fair value, opinions of value from brokers are obtained. Brokers provide a range of values based upon their own DCF calculations of our portfolio that reflect conditions in the secondary market and any recently executed servicing transactions. Management compares the internally-developed residential MSR values to the ranges of values received from brokers. If the residential MSRs fair value falls outside of the brokers' ranges, management will assess whether a valuation adjustment is warranted. The residential MSRs value is considered to represent a reasonable estimate of fair value. MSR’s are classified as Level 3. Gains and losses on MSRs are recognized on the Condensed Consolidated Statements of Operations through Miscellaneous income, net. Significant assumptions used in the valuation of residential MSRs include CPRs and the discount rate. Other important valuation assumptions include market-based servicing costs and the anticipated earnings on escrow and similar balances held by the Company in the normal course of mortgage servicing activities. Below is a sensitivity analysis of the most significant inputs utilized by the Company in the evaluation of residential MSRs: • A 10% and 20% increase in the CPR speed would decrease the fair value of the residential servicing asset by $2.8 million and $5.4 million, respectively, at March 31, 2024. • A 10% and 20% increase in the discount rate would decrease the fair value of the residential servicing asset by $3.6 million and $7.0 million, respectively, at March 31, 2024. Significant increases/(decreases) in any of those inputs in isolation would result in significantly (lower)/higher fair value measurements, respectively. These sensitivity calculations are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, the effect of an adverse variation in a particular assumption on the fair value of the MSRs is calculated without changing any other assumption, while in reality changes in one factor may result in changes in another, which may either magnify or counteract the effect of the change. Prepayment estimates generally increase when market interest rates decline and decrease when market interest rates rise. Discount rates typically increase when market interest rates increase and/or credit and liquidity risks increase and decrease when market interest rates decline and/or credit and liquidity conditions improve. Derivatives The valuation of these instruments is determined using commonly accepted valuation techniques, including DCF analysis on the expected cash flows of each derivative. This analysis reflects the contractual terms of the derivatives, including the period to maturity, and uses observable and unobservable market-based inputs. The fair value represents the estimated amount the Company would receive or pay to terminate the contract or agreement, taking into account current interest rates, foreign exchange rates, equity prices and, when appropriate, the current creditworthiness of the counterparties. NOTE 13. FAIR VALUE (continued) The Company incorporates credit valuation adjustments in the fair value measurement of its derivatives to reflect the counterparty's nonperformance risk, except for those derivative contracts with associated credit support annexes which provide credit enhancements, such as collateral postings and guarantees. The Company has determined that the majority of the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy. Certain of the Company's derivatives utilize Level 3 inputs, which are primarily related to total return settlement derivative contracts. The DCF model is utilized to determine the fair value of the total return settlement derivative contracts. The significant unobservable inputs for total return settlement derivative contracts used in the fair value measurement of the Company's liabilities are discount percentages, which are based on comparable financial instruments. See Note 12 to these Condensed Consolidated Financial Statements for a discussion of derivatives activity. Trading liabilities The sales and trading of financial instruments are recorded on the trade date. Trading liabilities includes amounts payable for securities transactions that have not reached their contractual settlement date. Financial instruments owned and securities sold, not yet purchased, are carried at fair value. Level 3 Rollforward for Assets and Liabilities Measured at Fair Value on a Recurring Basis The tables below present the changes in Level 3 balances for those assets and liabilities measured at fair value on a recurring basis for the periods indicated. Three months ended March 31, 2024 Three months ended March 31, 2023 (in thousands) Beneficial interest in Structured, LLC RICs HFI MSRs Derivatives, net Other Total RICs HFI MSRs Derivatives, net Other Total Balances, beginning of period $ — $ 13,888 $ 94,266 $ (596) $ 552 $ 108,110 $ 20,924 $ 107,383 $ (2,210) $ 139 $ 126,236 Gain / (losses) in OCI (23,469) — — — — (23,469) — — — — — Gains/(losses) in earnings — — 3,848 263 (9) 4,102 — (2,539) (169) (2) (2,710) Additions/Issuances — — — — 465 465 — — — — — Transfer from Level 2 1,122,510 — — — 5,576 1,128,086 — — — 2,219 2,219 Settlements (1) (16,692) (1,394) (2,338) — (436) (20,860) (2,100) (2,534) — — (4,634) Balances, end of period $ 1,082,349 $ 12,494 $ 95,776 $ (333) $ 6,148 $ 1,196,434 $ 18,824 $ 102,310 $ (2,379) $ 2,356 $ 121,111 Changes in unrealized gains (losses) included in earnings related to balances still held at end of period $ — $ — $ 3,848 $ 263 $ (9) $ 4,102 $ — $ (2,539) $ (169) $ (2) $ (2,710) (1) Settlements include charge-offs, prepayments, paydowns and maturities. NOTE 13. FAIR VALUE (continued) Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The Company may be required to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP from time to time. These adjustments to fair value usually result from application of lower-of-cost-or-fair value accounting or certain impairment measures. Assets measured at fair value on a nonrecurring basis that were still held on the balance sheet were as follows at the dates indicated: (in thousands) Level 1 Level 2 Level 3 Balance at March 31, 2024 Level 1 Level 2 Level 3 Balance at December 31, 2023 Impaired commercial LHFI $ — $ 137,370 $ 96,774 $ 234,144 $ — $ 230,443 $ 41,432 $ 271,875 Foreclosed assets — 20,922 — 20,922 — 24,588 — 24,588 Vehicle inventory — 356,793 — 356,793 — 311,321 — 311,321 LHFS — — 60,978 60,978 — — 140,655 140,655 Auto loans impaired due to bankruptcy — 139,709 — 139,709 — 154,684 — 154,684 Valuation Processes and Techniques - Nonrecurring Fair Value Assets and Liabilities Impaired commercial LHFI in the table above represents the recorded investment of impaired commercial loans for which the Company measures impairment during the period based on the fair value of the underlying collateral supporting the loan. Written offers to purchase a specific impaired loan are considered observable market inputs, which are considered Level 1 inputs. Appraisals are obtained to support the fair value of the collateral and incorporate measures such as recent sales prices for comparable properties and are considered Level 2 inputs. Loans for which the value of the underlying collateral is determined using a combination of real estate appraisals, field examinations and internal calculations are classified as Level 3. The inputs in the internal calculations may include the loan balance, estimation of the collectability of the underlying receivables held by the customer used as collateral, sale and liquidation value of the inventory held by the customer used as collateral and historical loss-given-default parameters. In cases in which the carrying value exceeds the fair value of the collateral less cost to sell, an impairment charge is recognized. Foreclosed assets represent the recorded investment in assets taken during the period presented in foreclosure of defaulted loans and are primarily comprised of commercial and residential real properties and generally measured at fair value less costs to sell. The fair value of the real property is generally determined using appraisals or other indications of market value based on recent comparable sales of similar properties or assumptions generally observable in the marketplace. The Company estimates the fair value of its vehicles, which are obtained either through repossession or lease termination, using historical auction rates and current market values of used cars. The Company had LHFS portfolios of $61.0 million and $140.7 million at March 31, 2024 and December 31, 2023, respectively, that are measured at fair value on a nonrecurring basis primarily consisting of commercial loans and RICs. The estimated fair value of these LHFS is calculated based on a combination of estimated market rates for similar loans with similar credit risks and a DCF analysis in which the Company uses significant unobservable inputs on key assumptions, including historical default rates and adjustments to reflect voluntary prepayments, prepayment rates, discount rates reflective of the cost of funding, and credit loss expectations. For loans that are considered collateral-dependent, such as certain bankruptcy loans, impairment is measured based on the fair value of the collateral less its estimated cost to sell. For the underlying collateral, the estimated fair value is obtained using historical auction rates and current market levels of the collateral securing the loans. NOTE 13. FAIR VALUE (continued) The estimated fair value of goodwill is valued using unobservable inputs and is classified as Level 3. Goodwill is written down to fair value when, as a result of an annual or interim goodwill impairment test, an impairment is identified and recognized. Fair value is calculated using widely-accepted valuation techniques, such as the guideline public company market approach (earnings and price-to-tangible book value multiples of comparable public companies) and the income approach (the DCF method). The Company uses a combination of these accepted methodologies to determine the fair valuation of reporting units. Several factors are taken into account, including actual operating results, future business plans, economic projections, and market data. On a quarterly basis, the Company assesses whether or not impairment indicators are present. For information on the Company's goodwill impairment test and the results of the most recent goodwill impairment test, see Note 5 for a description of the Company's goodwill valuation methodology. Fair Value Adjustments The following table presents the increases and decreases in value of certain assets that are measured at fair value on a nonrecurring basis for which a fair value adjustment has been included in the Condensed Consolidated Statements of Operations relating to assets held at period-end: Three months ended March 31, (in thousands) Statement of Operations Location 2024 2023 Impaired LHFI Credit loss expense / (benefit) $ (3,505) $ (3,250) Foreclosed assets Miscellaneous income, net (1) (3,964) (8) LHFS Miscellaneous income, net (1) — (3,769) Auto loans impaired due to bankruptcy Credit loss expense / (benefit) 11,957 (3,371) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected. Level 3 Inputs - Significant Recurring and Nonrecurring Fair Value Assets and Liabilities The following table presents quantitative information about the significant unobservable inputs within significant Level 3 recurring and nonrecurring assets and liabilities at the dates indicated: (dollars in thousands) Fair Value at March 31, 2024 (3) Valuation Technique Unobservable Inputs Range Financial Assets: Beneficial interest in Structured LLC $ 1,082,349 DCF Discount rate (1) 11.50% Loss severity rate 0.00% -100.00% Extension of Loan 0 to 60 months MSRs $ 95,776 DCF CPR (2) 0.00% - 100.00% (7.48%) Discount rate (1) 9.81 % (1) Average discount rate from collateral stratified by loan type and note rate. Weighted average amount was developed by weighting the associated relative UPB. (2) Average CPR projected from collateral stratified by loan type and note rate. Weighted average amount was developed by weighting the associated relative UPB. (3) Excluded insignificant Level 3 assets and liabilities. NOTE 13. FAIR VALUE (continued) (dollars in thousands) Fair Value at December 31, 2023 (3) Valuation Technique Unobservable Inputs Range MSRs $ 94,266 DCF CPR (2) 0.00% - 100.00% (7.53%) Discount rate (3) 9.81 % (1), (2), (3) - See corresponding footnotes to the March 31, 2024 Level 3 significant inputs table above. Fair Value of Financial Instruments The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments are as follows as of the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 14,413,097 $ 14,413,097 $ 14,413,097 $ — $ — $ 13,118,428 $ 13,118,428 $ 13,118,428 $ — $ — Federal funds sold and securities purchased under resale agreements or similar arrangements 9,465,807 9,463,021 — 9,463,021 — 10,238,714 10,234,487 — 10,234,487 — Investments in debt securities AFS 7,091,513 7,091,514 226,359 5,782,806 1,082,349 7,039,537 7,039,537 25,409 7,014,128 — Investments in debt securities HTM 8,969,064 7,410,927 — 7,410,927 — 9,039,704 7,562,523 — 7,562,523 — Trading securities and other investments (2) 9,003,612 9,003,612 1,593,249 7,404,215 6,148 7,967,875 7,967,874 1,637,908 6,329,030 936 LHFI, net 84,937,664 86,999,045 — 137,370 86,861,675 86,115,156 89,544,115 — 230,443 89,313,672 LHFS 596,351 596,351 — 535,373 60,978 160,118 160,119 — 19,464 140,655 Restricted cash 5,365,963 5,365,963 5,365,963 — — 5,549,701 5,549,701 5,549,701 — — MSRs 95,776 95,776 — — 95,776 94,266 94,266 — — 94,266 Derivatives 1,160,331 1,160,331 586 1,159,713 32 1,090,194 1,090,194 4,807 1,085,333 54 Financial liabilities: Deposits (1) 20,763,160 20,834,335 — 20,834,335 — 19,947,868 20,040,000 — 20,040,000 — Federal funds purchased and securities loaned or sold under repurchase agreements 16,164,451 16,168,676 — 16,168,676 — 16,290,786 16,289,980 — 16,289,980 — Trading liabilities 2,960,617 2,960,617 2,665,439 295,178 — 2,699,500 2,699,500 2,371,823 327,293 384 Borrowings and other debt obligations 43,911,347 43,952,206 — 37,642,851 6,309,355 44,144,051 44,107,856 — 36,998,432 7,109,424 Derivatives 1,382,859 1,382,859 134 1,382,360 365 1,472,683 1,472,683 5,914 1,466,119 650 (1) This line item excludes deposit liabilities with no defined or contractual maturities in accordance with ASU 2016-01. ( 2) This line item includes CDs with a maturity greater than 90 days and investments in trading securities. Valuation Processes and Techniques - Financial Instruments The preceding tables present disclosures about the fair value of the Company's financial instruments. Those fair values for certain instruments are presented based upon subjective estimates of relevant market conditions at a specific point in time and information about each financial instrument. In cases in which quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. These techniques involve uncertainties resulting in variability in estimates affected by changes in assumptions and risks of the financial instruments at a certain point in time. Therefore, the derived fair value estimates presented above for certain instruments cannot be substantiated by comparison to independent markets. In addition, the fair values do not reflect any premium or discount that could result from offering for sale at one time an entity’s entire holding of a particular financial instrument, nor do they reflect potential taxes and the expenses that would be incurred in an actual sale or settlement. Accordingly, the aggregate fair value amounts presented above do not represent the underlying value of the Company. NOTE 13. FAIR VALUE (continued) The following methods and assumptions were used to estimate the fair value of each class of financial instruments not measured at fair value on the Condensed Consolidated Balance Sheets: Cash, cash equivalents and restricted cash Cash and cash equivalents include cash and due from depository institutions, interest-bearing deposits in other banks, federal funds sold, and securities purchased under agreements to resell. The related fair value measurements have been classified as Level 1, since their carrying value approximates fair value due to the short-term nature of the asset. Restricted cash is related to cash restricted for investment purposes, cash posted for collateral purposes, cash advanced for loan purchases, and lockbox collections. Cash and cash equivalents, including restricted cash, have maturities of three months or less and, accordingly, the carrying amount of these instruments is deemed to be a reasonable estimate of fair value. Securities Financing Activities No quoted prices exist for Securities Financing Activities, so fair value is determined using a DCF technique. Cash flows are estimated based on the terms of the contract. These cash flows are discounted using interest rates appropriate to the maturity of the instrument as well as the nature of the underlying collateral. Securities Financing Activities are classified as Level 2. At March 31, 2024 , the fair value of the underlying collateral was $61.9 billion before netting of $45.6 billion, all of which was sold or re-pledged. Investments in debt securities HTM Investments in debt securities HTM are recorded at amortized cost and are priced by third-party pricing vendors. The third-party vendors use a variety of methods when pricing these securities that incorporate relevant observable market data to arrive at an estimate of what a buyer in the marketplace would pay for a security under current market conditions. These investment securities are, therefore, considered Level 2. LHFI, net The fair values of loans are estimated based on groupings of similar loans, including but not limited to stratification by type, interest rate, maturity, and borrower creditworthiness. Discounted future cash flow analyses are performed for these loans incorporating assumptions of current and projected voluntary prepayment speeds. Discount rates are determined using the Company's current origination rates on similar loans, adjusted for changes in current liquidity and credit spreads (if necessary). Because the current liquidity spreads are generally not observable in the market and the expected loss assumptions are based on the Company's experience, these are Level 3 valuations. Impaired loans are valued at fair value on a nonrecurring basis. See further discussion under the section captioned "Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis" above. LHFS The Company has LHFS portfolios that are accounted for at the lower of cost or market. Estimated fair value for these portfolios is generally based on prices obtained from agreements to sell the specific assets, if availa

NON-INTEREST INCOME AND OTHER E

NON-INTEREST INCOME AND OTHER EXPENSES	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
NON-INTEREST INCOME AND OTHER EXPENSES	NON-INTEREST INCOME AND OTHER EXPENSES The following table presents the details of the Company's non-interest income for the following periods: Three months ended March 31, (in thousands) 2024 2023 Non-interest income: Consumer and commercial fees $ 84,217 $ 90,329 Lease income 593,447 628,424 Capital market revenue 115,970 37,082 Miscellaneous income, net Mortgage banking income, net 13,750 4,184 BOLI 18,194 15,570 Net gain on sale of operating leases 22,759 22,383 Asset and wealth management fees 80,603 61,133 (Loss) / gain on non-mortgage loans (740) (4,701) Other miscellaneous income, net (55,635) 8,903 Net gain / (loss) on sale of investment securities 65,166 36,960 Total Non-interest income $ 937,731 $ 900,267 Disaggregation of Revenue from Contracts with Customers The following table presents the Company's non-interest income disaggregated by revenue source: Three months ended March 31, (in thousands) 2024 2023 Non-interest income: In-scope of revenue from contracts with customers: Depository services (1) $ 31,048 $ 31,695 Commission and trailer fees (2) 77,063 57,626 Interchange income, net (2) 19,116 17,525 Underwriting service fees (2) 73,492 27,961 Asset and wealth management fees (2) 47,821 30,105 Other revenue from contracts with customers (2) 2,122 11,948 Total in-scope of revenue from contracts with customers 250,662 176,860 Out-of-scope of revenue from contracts with customers: Consumer and commercial fees (3) 34,952 41,626 Lease income 593,447 628,424 Other miscellaneous income, net (3) (6,496) 16,397 Net gain / (loss) on sale of investment securities 65,166 36,960 Total out-of-scope of revenue from contracts with customers 687,069 723,407 Total non-interest income $ 937,731 $ 900,267 (1) Primarily recorded in the Company's Consolidated Statements of Operations within Consumer and commercial fees. (2) Primarily recorded in the Company's Consolidated Statements of Operations within Miscellaneous income, net. (3) The balance presented excludes certain revenue streams that are considered in-scope and presented above. NOTE 14. NON-INTEREST INCOME AND OTHER EXPENSES (continued) Other Expenses The following table presents the Company's other expenses for the following periods: Three months ended March 31, (in thousands) 2024 2023 Other expenses: Amortization of intangibles $ 9,581 $ 10,446 Deposit insurance premiums and other expenses 16,604 18,757 Other administrative expenses 94,975 86,578 Other miscellaneous expenses 17,385 5,198 Total Other expenses $ 138,545 $ 120,979

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2024
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Income tax expense of $7.8 million and $28.2 million was recorded for the three months ended March 31, 2024 and 2023, respectively. This resulted in an ETR of 2.2% for the three months ended March 31, 2024, compared to 8.7% for the corresponding period in 2023. The income tax expense recorded (and related ETR) for the three months ended March 31, 2024 was directly impacted by an increase in forecasted electric vehicle tax credits expected to be generated in 2024 when compared to the first quarter of 2023. The Company is subject to the income tax laws of the U.S., its states and municipalities and certain foreign countries. These tax laws are complex and are potentially subject to different interpretations by the taxpayer and the relevant governmental taxing authorities. In establishing a provision for income tax expense, the Company must make judgments and interpretations about the application of these inherently complex tax laws. Actual income taxes paid may vary from estimates depending upon changes in income tax laws, actual results of operations, and the final audit of tax returns by taxing authorities. Tax assessments may arise several years after tax returns have been filed. The Company reviews its tax balances quarterly and, as new information becomes available, the balances are adjusted as appropriate. The Company is subject to ongoing tax examinations and assessments in various jurisdictions. In December 2021, a framework known as Pillar Two was established by the Organization for Economic Cooperation and Development (“OECD”). Pillar Two is designed to ensure large multinational companies pay a minimum level of tax on the income arising in each jurisdiction where they have operations. It will be effective for some countries in 2024 and others in future years. At this time, the Pillar Two framework has not been adopted by the U.S., but has been adopted by our parent’s jurisdiction. Any potential tax liability associated with SHUSA’s operations is expected to be accrued and paid by Santander. With few exceptions, the Company is no longer subject to federal and non-U.S. income tax examinations by tax authorities for years prior to 2011 and state income tax examinations for years prior to 2006. The Company applies an aggregate portfolio approach whereby income tax effects from AOCI are released only when an entire portfolio (i.e., all related units of account) of a particular type is liquidated, sold or extinguished. The Company had a net deferred tax asset balance of $195.7 million at March 31, 2024 (consisting of a deferred tax asset balance of $235.0 million and a deferred tax liability balance of $39.3 million with respect to jurisdictional netting), compared to a net deferred tax asset balance of $150.1 million at December 31, 2023 (consisting of a deferred tax asset balance of $234.3 million and a deferred tax liability balance of $84.2 million). The $45.6 million change in net deferred tax asset for the period ended March 31, 2024 was primarily due to a decrease in the deferred tax liability related to leasing transactions and an increase in the allowance for loan loss deferred tax asset.

COMMITMENTS, CONTINGENCIES, AND

COMMITMENTS, CONTINGENCIES, AND GUARANTEES	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS, CONTINGENCIES, AND GUARANTEES	COMMITMENTS, CONTINGENCIES, AND GUARANTEES Off-Balance Sheet Risk - Financial Instruments In the normal course of business, the Company utilizes a variety of financial instruments with off-balance sheet risk to meet the financing needs of its customers and manage its exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit, letters of credit, loans sold with recourse, forward contracts, and interest rate and cross currency swaps, caps, and floors. These financial instruments may involve, to varying degrees, elements of credit, liquidity, and interest rate risk in excess of the amount recognized on the Condensed Consolidated Balance Sheets. The contractual or notional amounts of these financial instruments reflect the extent of involvement the Company has in particular classes of financial instruments. The Company’s exposure to credit loss in the event of non-performance by the other party to the financial instrument for commitments to extend credit, letters of credit and loans sold with recourse is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. For forward contracts and interest rate swaps, caps and floors, the contract or notional amounts do not represent exposure to credit loss. The Company controls the credit risk of its forward contracts and interest rate swaps, caps and floors through credit approvals, limits, and monitoring procedures. See Note 12 to these Condensed Consolidated Financial Statements for discussion of all derivative contract commitments. The following table details the amount of commitments at the dates indicated: Other Commitments March 31, 2024 December 31, 2023 (in thousands) Commitments to extend credit $ 24,846,809 $ 25,239,691 Letters of credit 1,084,701 1,168,681 Recourse exposure on sold loans 18,157 18,546 Total commitments $ 25,949,667 $ 26,426,918 Commitments to Extend Credit Commitments to extend credit generally have fixed expiration dates, are variable rate, and contain provisions that permit the Company to terminate or otherwise renegotiate the contracts in the event of a significant deterioration in the customer’s credit quality. These arrangements normally require payment of a fee by the cu stomer, the pricing of which is based on prevailing market conditions, credit quality, probability of funding, and other relevant factors. Since many of these commitments are expected to expire without being drawn upon, the contract amounts are not necessarily indicative of future cash requirements. Included within the reported balances for commitments to extend credit at March 31, 2024 and December 31, 2023 were $3.3 billion and $3.1 billion, respectively, of commitments that can be canceled by the Company without notice. Commitments to extend credit also include amounts committed by the Company to fund its investments in CRA, LIHTC, and other equity method investments in which it is a limited partner. Letters of Credit The Company’s letters of credit meet the definition of a guarantee. Letters of credit commit the Company to make payments on behalf of its customers if specified future events occur. The guarantees are primarily issued to support public and private borrowing arrangements. The weighted average term of these commitments at March 31, 2024 was 11.1 months. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. In the event of a requested draw by the beneficiary that complies with the terms of the letter of credit, the Company would be required to honor the commitment. The Company has various forms of collateral for these letters of credit, including real estate assets and other customer business assets. The maximum undiscounted exposure related to these commitments at March 31, 2024 was $1.1 billion. The fees related to letters of credit are deferred and amortized over the lives of the respective commitments and were immaterial to the Company’s financial statements at March 31, 2024. Management believes that the utilization rate of these letters of credit will continue to be substantially less than the amount of the commitments, as has been the Company’s experience to date. The credit risk associated with letters of credit is monitored using the same risk rating system utilized within the loan and financing lease portfolio. As of March 31, 2024 and December 31, 2023, the liability related to unfunded lending commitments was $57.2 million and $60.8 million, respectively. NOTE 16. COMMITMENTS, CONTINGENCIES, AND GUARANTEES (continued) Unsecured Revolving Lines of Credit Such commitments arise primarily from agreements with customers for unused lines of credit on unsecured revolving accounts and credit cards, provided there is no violation of conditions in the underlying agreement. These commitments, substantially all of which the Company can terminate at any time, and which do not necessarily represent future cash requirements, are reviewed periodically based on account usage, customer creditworthiness and loan qualifications. Loans Sold with Recourse The Company has loans sold with recourse that meet the definition of a guaranty. For loans sold with recourse under the terms of its multifamily sales program with the FNMA, the Company retained a portion of the associated credit risk. RIC Commitments The following table summarizes significant liabilities recorded for commitments and contingencies associated with the Company's RIC origination and servicing operations, all of which are included in Accounts payable and accrued expenses in the accompanying Condensed Consolidated Balance Sheets at the dates indicated: Agreement or Legal Matter Commitment or Contingency March 31, 2024 December 31, 2023 (in thousands) MPLFA Revenue-sharing and gain/(loss), net-sharing payments $ 11,129 $ 10,302 MPLFA Under the terms of the MPLFA, SC must make revenue-sharing payments to Stellantis and also must share with Stellantis when residual gains/(losses) on leased vehicles exceed a specified threshold. The MPLFA requires SC to maintain at least $2.5 billion and $2.5 billion for floor plan and retail financing. In turn, Stellantis must provide designated minimum threshold percentages of its Subvention business to SC. Agreements In connection with the sale of RICs through securitizations and other sales, SC has made standard representations and warranties customary to the consumer finance industry. Violations of these representations and warranties may require SC to repurchase loans previously sold to on or off-balance sheet Trusts or other third parties. As of March 31, 2024, there were no loans that were the subject of a demand to repurchase or replace for breach of representations and warranties for SC's ABS or other sales. In the opinion of management, the potential exposure of other recourse obligations related to SC’s RIC sale agreements is not expected to have a material adverse effect on the Company's or SC’s business, consolidated financial position, results of operations, or cash flows. NOTE 16. COMMITMENTS, CONTINGENCIES, AND GUARANTEES (continued) Santander has provided guarantees on the covenants, agreements, and obligations of SC under the governing documents of its warehouse facilities and privately issued amortizing notes. These guarantees are limited to the obligations of SC as servicer. In November 2015, SC is party to a forward flow asset sale agreement with a third party under the terms of which SC is committed to sell $350.0 million in charged-off loan receivables in bankruptcy status on a quarterly basis. However, any sale of more than $275.0 million is subject to a market price check. The remaining aggregate commitment as of March 31, 2024 and December 31, 2023 not subject to a market price check was zero. Other Off-Balance Sheet Risk Other off-balance sheet risk stems from financial instruments that do not meet the definition of guarantees under applicable accounting guidance and from other relationships that include items such as indemnifications provided in the ordinary course of business and intercompany guarantees. Legal and Regulatory Proceedings The Company, including its subsidiaries, is and in the future periodically expects to be party to, or otherwise involved in, various claims, disputes, lawsuits, investigations, regulatory matters and other legal matters and proceedings that arise in the ordinary course of business. In view of the inherent difficulty of predicting the outcome of any such claim, dispute, lawsuit, investigation, regulatory matter and/or legal proceeding, particularly where the claimants seek very large or indeterminate damages or where the matters present novel legal theories or involve a large number of parties, the Company generally cannot predict the eventual outcome of the pending matters, the timing of the ultimate resolution of the matters, or the eventual loss, fines or penalties related to the matters, if any. Accordingly, except as provided below, the Company is unable to reasonably estimate a range of its potential exposure, if any, to these claims, disputes, lawsuits, investigations, regulatory matters and other legal proceedings at this time. It is reasonably possible that actual outcomes or losses may differ materially from the Company's current assessments and estimates, and any adverse resolution of any of these matters against it could materially and adversely affect the Company's business, financial position, liquidity, and results of operations. The Company establishes an accrued liability for legal and regulatory proceedings when those matters present material loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued that are reasonably possible. As of March 31, 2024 and December 31, 2023, the Company accrued aggregate legal and regulatory liabilities of approximately $12.6 million and $12.4 million, respectively. Further, the Company estimates the aggregate range of reasonably possible losses for legal and regulatory proceedings, in excess of reserves established, of up to approximately $13.3 million as of March 31, 2024 and $14.6 million as of December 31, 2023. Set forth below are descriptions of the significant lawsuits, regulatory matters, and other legal proceedings to which the Company is subject. NOTE 16. COMMITMENTS, CONTINGENCIES, AND GUARANTEES (continued) Consumer Lending Cases The Company and its subsidiaries are party to various lawsuits pending in federal and state courts alleging violations of state and federal consumer lending laws, including, without limitation, the Equal Credit Opportunity Act, the Fair Debt Collection Practices Act, the Fair Credit Reporting Act, Section 5 of the Federal Trade Commission Act, the Telephone Consumer Protection Act, the Truth in Lending Act, wrongful repossession laws, usury laws and laws related to unfair and deceptive acts or practices. In general, these cases seek damages and equitable and/or other relief. Enterprise Financial Group v. SC. EFG, a former GAP products and services provider to SC, sued SC for breach of contract, alleging that SC placed non-conforming loans in the program, resulting in EFG losses. The case is pending in Texas District Court, Dallas County, and is captioned Enterprise Financial Group v. SC, Case No. 18-08119. SC asserted a counterclaim against EFG seeking approximately $10.5 million in connection with EFG’s refusal to pay claims. A jury trial concluded on November 2, 2022 and the jury awarded EFG $5 million and SC $4.2 million. On May 9, 2023, the court issued a final judgment awarding EFG approximately $10.6 million, and eliminating the jury award of $4.2 million in favor of SC. On July 17, 2023, the court heard arguments on SC’s motion for judgment notwithstanding the verdict, a new trial and remittitur. The court denied SC's motions for judgment notwithstanding the verdict, new trial, or remittitur. SC has appealed. Real Legacy Assurance ERISA Litigation. On April 13, 2020, participants of the Real Legacy Assurance Plan, a pension plan, filed an amended complaint adding SSLLC as a defendant to an ERISA putative class action pending against the owner of Real Legacy, Real Legacy Board members, the Plan’s Trustee, actuaries, and other defendants. The case is pending in the United States District Court for the District of Puerto Rico and captioned Vega-Ortiz et al v. Cooperativa de Seguros Multiples de Puerto Rico, et al, Civ. No. 3:19-cv-02056. The amended complaint alleges that SSLLC served as an investment manager to the Real Legacy Assurance Plan and breached its fiduciary duties by failing to ensure that the plan was adequately funded. On November 24, 2021, the court denied each of the defendants’ motions to dismiss. SSLLC filed its answer and discovery is ongoing. On April 4, 2023, the court granted the plaintiffs' motion for class certification. Santander Consumer USA Holdings Inc. Stockholders Litigation. A consolidated, certified class action litigation is pending in the Court of Chancery of the State of Delaware captioned In re Santander Consumer USA Holdings Inc. Stockholders Litigation, No. 2022-0689 , filed by former SC shareholders against SHUSA, Santander and current and former SC directors and officers alleging breaches of fiduciary duty related to SHUSA’s January 2022 acquisition of the remaining minority shares of SC, allegedly resulting in a failure to fairly compensate the minority shareholders. The parties are engaged in discovery. These matters are ongoing and could in the future result in the imposition of damages, fines, or other penalties. No assurance can be given that the ultimate outcome of these matters or any resulting proceedings would not materially and adversely affect the Company's business, financial condition, and results of operations. Regulatory Investigations and Proceedings The Company is party to, or is periodically otherwise involved in, reviews, investigations, examinations, and proceedings (both formal and informal), and information-gathering requests, by government and self-regulatory agencies, including the FRB of Boston, the CFPB, the DOJ, the SEC, the CFTC, the Federal Trade Commission and various state regulatory and enforcement agencies.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2024
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS In the normal course of business, the Company conducts business with Santander and its subsidiaries. Santander policy requires that these transactions occur at prevailing market rates and terms, and, where applicable, these transactions are compliant with United States banking regulations. All extensions of credit by (and certain credit exposures of) the Bank to other Santander affiliates are legally required to be secured by eligible collateral. The following disclosures below are the more significant related party transactions entered into during 2023: Debt and derivative activities The Company and its affiliates have various debt and derivative agreements with Santander. For further details of these agreements, see Note 10 and Note 20 to the Consolidated Financial Statements of the Company's Annual Report on Form 10-K for 2023. On October 5, 2023, SBNA entered into a loan agreement with Santander to borrow $2.0 billion at a fixed rate of 6.98%, which will mature on October 16, 2025. Mezzanine and Stockholder's Equity On December 21, 2022, the Company issued 500,000 shares of the Series E Preferred Stock. Dividends on the Series E Preferred Stock are payable when, as and if authorized by the Company’s Board of Directors or a duly authorized committee thereof. From and including December 21, 2022 to but excluding December 21, 2027, dividends accrue on a non-cumulative basis a rate of 8.41% per annum, payable quarterly in arrears. From and including December 21, 2027, dividends on the Series E Preferred Stock will accrue on a non-cumulative basis at the five-year U.S. Treasury rate as of the most recent re-set dividend determination date plus 4.74% for each dividend re-set period, payable quarterly in arrears. The Company may redeem the Series E Preferred Stock on, among others, any dividend payment date on or after December 31, 2027. On June 15, 2023, the Company issued 1,000,000 shares of the Series F Preferred Stock. Dividends on the Series F Preferred Stock are payable when, as and if authorized by the Company’s Board of Directors or a duly authorized committee thereof. From and including June 15, 2023 to but excluding June 21, 2028, dividends accrue on the Series F Preferred Stock on a non-cumulative basis at a rate of 9.380% per annum, payable quarterly in arrears. From and including June 21, 2028, dividends will accrue on a non-cumulative basis at the five-year U.S. Treasury rate as of the most recent re-set dividend determination date plus 5.467% for each dividend re-set period, payable quarterly in arrears. The Company may redeem the Series F Preferred Stock on, among others, any dividend payment date on or after June 21, 2028. On December 19, 2023, the Company issued 500,000 shares of the Series G Preferred Stock. Dividends on the Series G Preferred Stock are payable when, as and if authorized by the Company’s Board of Directors or a duly authorized committee thereof. From and including December 19, 2023 to but excluding December 21, 2028, dividends accrue on the Series G Preferred Stock on a non-cumulative basis a rate of 8.170% per annum, payable quarterly in arrears. From and including December 21, 2028, dividends will accrue on a non-cumulative basis at the five-year U.S. Treasury rate as of the most recent re-set dividend determination date plus 4.360% for each dividend re-set period, payable quarterly in arrears. The Company may redeem the Series G Preferred Stock on, among others, any dividend payment date on or after December 21, 2028. As of March 31, 2024 , Santander was the sole holder of the Series E, F, and G Preferred Stock. During the three months ended March 31, 2024, the Company declared and paid dividends to its common shareholder, Santander, in the amount of $0.0 billion. In addition, during the three months ended March 31, 2024, the Company declared and paid dividends to its preferred shareholder, Santander, in the amount of $44.4 million. NOTE 17. RELATED PARTY TRANSACTIONS (continued) Deposit and checking accounts Affiliates of Santander that are not consolidated by SHUSA had deposits with SBNA o f $179.0 million and $141.8 million as of March 31, 2024 and December 31, 2023, respectively. Repurchase Agreements and Securities Trading During the three months ended March 31, 2024, SanCap entered into intercompany repurchase agreements and securities trading with Santander and its affiliates. The gross principal amount outstanding on these repurchase agreements and securities trading activities, which do not eliminate in consolidation, was $45.0 million and $105.0 million at March 31, 2024, respectively. During the three months ended March 31, 2024, the amount of income / expense related to these accounts was negligible to the overall results of the Company and Santander.

BUSINESS SEGMENT INFORMATION

BUSINESS SEGMENT INFORMATION	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
BUSINESS SEGMENT INFORMATION	BUSINESS SEGMENT INFORMATION Business Segment Products and Services The Company’s reportable segments are focused principally around the customers the Company serves. The Company has identified the following reportable segments: Auto, CBB, C&I, CRE, CIB, and Wealth Management. • The Auto segment includes the Company's consumer and commercial auto loans and leases and the Company's commercial loans to dealers and dealer floorplan financing products. This includes the Company's specialized consumer finance subsidiary focused on vehicle finance and third-party servicing. The specialized consumer finance primary business is the indirect origination of RICs, principally through manufacturer-franchised dealers in connection with their sale of new and used vehicles to retail consumers. The Company offers a full spectrum of auto financing products and services to captive financing companies. These products and services include consumer RICs and leases, as well as dealer loans for inventory, construction, real estate, working capital and revolving lines of credit. The Company also originates vehicle loans through a web-based direct lending program, purchases vehicle RICs from other lenders, and services automobile, recreational and marine vehicle portfolios for other lenders. All intercompany revenue and fees between consolidated affiliates are eliminated in the consolidated results of the Company. • The CBB segment includes the products and services provided to consumer and small business banking customers, including consumer deposit, small business banking, unsecured lending, and investment services. This segment offers a wide range of products and services to consumers and business banking customers, including demand and interest-bearing demand deposit accounts, money market and savings accounts, CDs, and retirement savings products. It also offers lending products such as unsecured personal loans, credit cards, and small business loans such as business lines of credit. In addition, the Company makes investment services available to its retail customers, including products such as annuities, mutual funds, managed accounts, and insurance products through a networking agreement with a consolidated affiliate. • The C&I segment currently provides commercial lines, loans, letters of credit, receivables financing, commercial credit cards, and cash management and deposit services to lower middle market commercial customers and to medium- and large-sized commercial customers, as well as financing and deposits for government entities. This segment also provides niche product financing for specific industries. • The CRE segment offers CRE loans, CEVF, and multifamily loans, as well as cash management and deposit services to customers. This category also includes community development finance activities, including originating CRA-eligible loans and making CRA-eligible investments. • The CIB segment serves the needs of global corporate and institutional customers by leveraging the international footprint of Santander to provide financing and banking services to corporations with over $500 million in annual revenues. CIB also includes the Company's institutional broker-dealer that provides services in investment banking, sales, trading, and equity research reports. CIB's offerings and strategy are based on Santander's local and global capabilities in wholesale banking. • The Wealth Management segment consists of the Company's international private banking and financial operations Services include the full range of banking and asset management services to foreign individuals and corporations based primarily in Latin America The Company also offers cus tomer-related derivatives to hedge interest rate risk, and in the C&I, CRE, and CIB business segments and the dealer commercial lending division of the Auto business segment, offers derivatives relating to foreign exchange and lending arrangements. See Note 12 to these Condensed Consolidated Financial Statements for additional details. The Other category includes certain immaterial subsidiaries, the unallocated interest expense on the Company's borrowings and other debt obligations and certain unallocated corporate income and indirect expenses. NOTE 18. BUSINESS SEGMENT INFORMATION (continued) The Company's segment results are derived from the Company’s business unit profitability reporting system by specifically attributing managed balance sheet assets, deposits and other liabilities and their related interest income or expense to each of the segments. Funds transfer pricing methodologies are utilized to allocate a cost for funds used or a credit for funds provided to business line deposits, loans and selected other assets using a matched funding concept. The methodology includes a liquidity premium adjustment, which considers an appropriate market participant spread for commercial loans and deposits by analyzing the mix of borrowings available to the Company with comparable maturity periods. Other income and expenses are managed directly by each reportable segment, including fees, service charges, salaries and benefits, and other direct expenses, as well as certain allocated corporate expenses, and are accounted for within each segment’s financial results. Accounting policies for the lines of business are the same as those used in preparation of the Condensed Consolidated Financial Statements with respect to activities specifically attributable to each business line. However, the preparation of business line results requires management to establish methodologies to allocate funding costs and benefits, expenses, and other financial elements to each line of business. Where practical, the results are adjusted to present consistent methodologies for the segments. The application and development of management reporting methodologies is a dynamic process and is subject to periodic enhancements. The implementation of these enhancements to the internal management reporting methodology may materially affect the results disclosed for each segment with no impact on consolidated results. Whenever significant changes to management reporting methodologies take place, prior period information is reclassified wherever practicable. Results of Segments The following tables present certain information regarding the Company’s segments: Three months ended SHUSA Reportable Segments Consumer Activities Commercial Activities March 31, 2024 Auto CBB C&I CRE CIB Wealth Management Other (1) Total (in thousands) Net interest income / (expense) $ 885,622 $ 377,814 $ 86,401 $ 124,191 $ 26,911 $ 60,684 $ (184,114) $ 1,377,509 Non-interest income 571,158 61,348 14,070 8,953 164,850 83,732 33,620 937,731 Credit loss expense / (benefit) 379,652 52,034 (21,395) 8,737 (12,743) — (1,287) 404,998 Total expenses 807,303 353,005 52,986 32,366 195,479 66,870 51,272 1,559,281 Income/(loss) before income taxes 269,825 34,123 68,880 92,041 9,025 77,546 (200,479) 350,961 Total assets 61,259,798 11,747,388 4,080,901 23,845,435 26,842,241 7,322,916 30,667,061 165,765,740 (1) Other includes the results of the immaterial entities, earnings from non-strategic assets, the investment portfolio, interest expense on SBNA’s and the Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. Three months ended SHUSA Reportable Segments Consumer Activities Commercial Activities March 31, 2023 Auto CBB C&I CRE CIB Wealth Management Other (1) Total (in thousands) Net interest income / (expense) $ 920,272 $ 400,246 $ 82,942 $ 105,132 $ 59,789 $ 70,019 $ (128,006) $ 1,510,394 Non-interest income 650,683 65,974 10,929 4,997 89,735 57,655 20,294 900,267 Credit loss expense / (benefit) 417,766 109,095 2,094 30,383 (11,122) — (5,815) 542,401 Total expenses 824,726 368,348 59,023 31,781 120,139 68,522 70,635 1,543,174 Income/(loss) before income taxes 328,463 (11,223) 32,754 47,965 40,507 59,152 (172,532) 325,086 Total assets 62,163,190 13,174,180 6,021,239 21,921,029 36,282,779 8,267,535 29,727,891 177,557,843 (1) Refer to corresponding notes above.

DESCRIPTION OF BUSINESS, BASI_2

DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These Condensed Consolidated Financial Statements include the accounts of the Company and its consolidated subsidiaries, including certain Trusts that are considered VIEs. The Company generally consolidates VIEs for which it is deemed to be the primary beneficiary and VOEs in which the Company has a controlling financial interest. All significant intercompany balances and transactions have been eliminated in consolidation. These Condensed Consolidated Financial Statements have been prepared in accordance with GAAP and pursuant to SEC regulations. In the opinion of management, the accompanying Condensed Consolidated Financial Statements reflect all adjustments of a normal and recurring nature necessary for a fair statement of the Consolidated Balance Sheets, Statements of Operations, Statements of Comprehensive Income, Statements of Stockholder's Equity and Statement of Cash Flows for the periods indicated, and contain adequate disclosure to make the information presented not misleading. Certain prior-year amounts have been reclassified to conform to the current year presentation. These reclassifications did not have a material impact on the Company's consolidated financial condition or results of operations.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could differ from those estimates, and those differences may be material. The most significant estimates include the ACL, expected end-of-term lease residual values, and goodwill. These estimates, although based on actual historical trends and modeling, may potentially show significant variances over time.
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted	Recently Adopted Accounting Standards On January 1, 2024, the Company adopted ASU 2023-02 Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method , which permits the use of an accounting policy election to apply the proportional amortization method to all tax equity investments that meet specific criteria. The adoption of this standard did not impact the Company's financial position or results of operations. On January 1, 2023, the Company adopted ASU 2022-02 Financial Instruments – Credit Losses (Topic 326) Troubled Debt Restructuring and Vintage Disclosures Recently Issued Accounting Standards Not Yet Adopted On August 23, 2023, the FASB issued ASU 2023-05 Business Combinations - Joint Venture Formations, Recognition and Initial Measurement requiring most assets and liabilities contributed to a joint venture upon formation to be measured at fair market value. The new guidance is effective prospectively for all joint ventures with a formation date on or after January 1, 2025, and early adoption is permitted. The Company does not expect a material impact on the Company’s financial position or results of operations. On November 27, 2023, the FASB issued ASU 2023-07 Segment Reporting – Improvements to Reportable Segment Disclosures, which enhances segment disclosure requirements primarily in the area of significant segment expenses. The new disclosure requirements are effective retrospectively for all periods presented beginning with the 2024 annual financial statements and interim periods thereafter, with early adoption permitted. On December 14, 2023, the FASB issued ASU 2023-09 Income Taxes – Improvements to Income Tax Disclosures, requiring consistent categories and greater disaggregation of information in the rate reconciliation, and income taxes paid disaggregated by jurisdiction. The new disclosure requirements are effective for annual periods beginning in 2025, with early adoption permitted.
Subsequent Events	Subsequent Events The Company evaluated events from the date of these Condensed Consolidated Financial Statements on March 31, 2024 through the issuance of these Condensed Consolidated Financial Statements. Except as noted in Note 9 to these Condensed Consolidated Financial Statements, there were no material events in that period that would require recognition or disclosure in its Condensed Consolidated Financial Statements as of March 31, 2024.
Fair Value Measurements	The fair value of a financial asset is measured on a stand-alone basis and cannot be measured as a group, with the exception of certain financial instruments held and managed on a net portfolio basis. In measuring the fair value of a nonfinancial asset, the Company assumes the highest and best use of the asset by a market participant, not just the intended use, to maximize the value of the asset. The Company also considers whether any credit valuation adjustments are necessary based on the counterparty's credit quality. Any models used to determine fair values or validate dealer quotes based on the descriptions below are subject to review and testing as part of the Company's model validation and internal control testing processes. NOTE 13. FAIR VALUE (continued) The Company's Market Risk Department approves the methodologies used in the estimations of fair value, including the Company's Level 3 assets and liabilities. Price validation procedures are performed, and the results are reviewed for Level 3 assets and liabilities by the Market Risk Department. Price validation procedures performed for these assets and liabilities can include comparing current prices to historical pricing trends by collateral type and vintage, comparing prices by product type to indicative pricing grids published by market makers, and obtaining corroborating dealer prices for significant securities.

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	3 Months Ended
	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Summary of Debt Securities, Available-for-sale	The following table presents the amortized cost, gross unrealized gains and losses and approximate fair values of investments in debt securities AFS at the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair U.S. Treasury securities $ 226,294 $ 80 $ (15) $ 226,359 $ 25,391 $ 18 $ — $ 25,409 Corporate debt securities 2,128 2 — 2,130 31,584 7 (1) 31,590 ABS 550,506 232 (999) 549,739 512,553 29 (1,919) 510,663 Beneficial interest in Structured LLC (2) 1,105,817 — (23,469) 1,082,348 1,122,510 — — 1,122,510 MBS: GNMA - Residential 3,123,600 — (383,366) 2,740,234 3,187,600 — (394,756) 2,792,844 GNMA - Commercial 655,566 4 (144,425) 511,145 659,882 4 (141,672) 518,214 FHLMC and FNMA - Residential 2,283,311 1 (392,303) 1,891,009 2,330,558 3 (381,142) 1,949,419 FHLMC and FNMA - Commercial 91,689 — (3,140) 88,549 91,821 — (2,933) 88,888 Unallocated fair value hedge basis adjustment (1) (81,397) — 81,397 — (36,009) — 36,009 — Total investments in debt securities AFS $ 7,957,514 $ 319 $ (866,320) $ 7,091,513 $ 7,925,890 $ 61 $ (886,414) $ 7,039,537 (1) The Company has entered into fair value hedges of portions of a closed portfolio of AFS debt securities, using the portfolio layer method. Refer to Note 12 for additional information. (2) Represents a 20 percent interest in the Structured LLC to hold and service a pool of multi-family loans.
Summary of Held-to-Maturity Securities	The following table presents the amortized cost, gross unrealized gains and losses and approximate fair values of investments in debt securities HTM at the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair Investment securities: ABS and other interests in structured securities $ 82,024 $ — $ (283) $ 81,741 $ 29,701 $ — $ (363) $ 29,338 MBS: GNMA - Residential 2,705,439 177 (501,124) 2,204,492 2,752,158 724 (469,929) 2,282,953 GNMA - Commercial 4,793,728 — (924,608) 3,869,120 4,843,478 492 (894,635) 3,949,335 FHLMC and FNMA - Residential 1,387,873 — (132,299) 1,255,574 1,414,367 — (113,470) 1,300,897 Total investments in debt securities HTM $ 8,969,064 $ 177 $ (1,558,314) $ 7,410,927 $ 9,039,704 $ 1,216 $ (1,478,397) $ 7,562,523
Summary of Investments Classified by Contractual Maturity Date	Contractual maturities of the Company’s investments in debt securities AFS at March 31, 2024 were as follows: (in thousands) Amortized Cost (1) Fair Value Due within one year $ 29,941 $ 29,899 Due after 1 year but within 5 years 332,404 327,589 Due after 5 years but within 10 years 264,315 256,947 Due after 10 years 7,412,251 6,477,078 Total $ 8,038,911 $ 7,091,513 (1) Does not include unallocated fair value hedge basis adjustment. Contractual maturities of the Company’s investments in debt securities HTM at March 31, 2024 were as follows: (in thousands) Amortized Cost Fair Value Due within one year $ — $ — Due after 1 year but within 5 years 28,974 28,690 Due after 5 years but within 10 years 57,618 57,369 Due after 10 years 8,882,472 7,324,868 Total $ 8,969,064 $ 7,410,927
Summary of Gross Unrealized Loss and Fair Value of Debt Securities Available-for-Sale	The following table presents the aggregate amount of unrealized losses on debt securities in the Company’s AFS investment portfolios classified according to the amount of time those securities have been in a continuous loss position as of the dates indicated: March 31, 2024 December 31, 2023 Less than 12 months 12 months or longer Less than 12 months 12 months or longer (in thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized U.S. Treasury securities $ 6,954 $ (15) $ — $ — $ 6,992 $ — $ — $ — Corporate debt securities 72 — 13 — 7,325 (1) 13 — ABS 84,402 (79) 131,838 (920) 6,749 (168) 402,325 (1,751) Beneficial Interest in Structured Entities 1,046,284 (23,469) — — — — — — MBS: GNMA - Residential — — 2,739,232 (383,366) — — 2,792,843 (394,756) GNMA - Commercial — — 511,142 (144,425) — — 518,210 (141,672) FHLMC and FNMA - Residential — — 1,890,924 (392,303) — — 1,949,320 (381,142) FHLMC and FNMA - Commercial — — 88,549 (3,140) — — 88,888 (2,933) Total investments in debt securities AFS (1) $ 1,137,712 $ (23,563) $ 5,361,698 $ (924,154) $ 21,066 $ (169) $ 5,751,599 $ (922,254) (1) Does not include unallocated fair value hedge basis adjustment.
Summary of Gross Unrealized Loss and Fair Value of Debt Securities Held-to-maturity	The following table presents the aggregate amount of unrealized losses on debt securities in the Company’s HTM investment portfolios classified according to the amount of time those securities have been in a continuous loss position as of the dates indicated: March 31, 2024 December 31, 2023 Less than 12 months 12 months or longer Less than 12 months 12 months or longer (in thousands) Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized Fair Value Unrealized ABS and other interests in structured securities $ 3,537 $ — $ 25,155 $ (283) $ 22,461 $ (313) $ 6,878 $ (50) MBS: GNMA - Residential 66,910 (429) 2,091,347 (500,695) — — 2,166,032 (469,929) GNMA - Commercial 69,063 (1,130) 3,800,058 (923,478) 45,983 (1,610) 3,856,536 (893,025) FHLMC and FNMA - Residential 56,350 (827) 1,199,224 (131,472) 57,955 (528) 1,242,941 (112,942) Total investments in debt securities HTM $ 195,860 $ (2,386) $ 7,115,784 $ (1,555,928) $ 126,399 $ (2,451) $ 7,272,387 $ (1,475,946)
Summary of Gains (Losses) on Sales of Investment Securities	The realized gross gains and losses from sales of investment securities were as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 AFS debt and other securities: Gross realized gains $ — $ 192 Gross realized losses — (4,690) Net realized gains/(losses) on AFS and other securities $ — $ (4,498) Total trading securities gains/(losses) 65,166 41,458 Total realized gains/(losses) in income from investments $ 65,166 $ 36,960
Summary of Other Investments	Other investments consisted of the following as of the dates indicated: (in thousands) March 31, 2024 December 31, 2023 FHLB of Pittsburgh and FRB stock $ 571,981 $ 631,394 LIHTC investments 721,298 660,694 Equity securities not held for trading (1) 52,741 61,190 Total $ 1,346,020 $ 1,353,278 (1) Includes $4.3 million and $2.8 million of equity certificates related to an off-balance sheet securitization as of March 31, 2024 and December 31, 2023, respectively.

LOANS AND ALLOWANCE FOR CREDI_2

LOANS AND ALLOWANCE FOR CREDIT LOSSES (Tables)	3 Months Ended
	Mar. 31, 2024
Receivables [Abstract]
Summary of Loans Receivable	The following presents the composition of loans and leases HFI by portfolio and by rate type as of the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Amount Percent Amount Percent Commercial LHFI: CRE loans $ 9,073,614 9.9 % $ 8,747,544 9.4 % C&I loans 10,825,263 11.8 % 11,181,962 12.0 % Multifamily loans 10,232,335 11.2 % 10,548,905 11.3 % Other commercial (2) 7,484,125 8.2 % 7,476,113 8.0 % Total commercial LHFI $ 37,615,337 41.1 % $ 37,954,524 40.7 % Consumer loans secured by real estate: Residential mortgages 4,726,561 5.2 % 4,816,218 5.2 % Home equity loans and lines of credit 2,335,081 2.5 % 2,448,454 2.6 % Total consumer loans secured by real estate $ 7,061,642 7.7 % $ 7,264,672 7.8 % Consumer loans not secured by real estate: RICs and auto loans 43,238,767 47.1 % 43,705,359 47.0 % Personal unsecured loans 3,711,491 4.0 % 4,062,700 4.4 % Other consumer (3) 52,551 0.1 % 59,954 0.1 % Total consumer loans $ 54,064,451 58.9 % $ 55,092,685 59.3 % Total LHFI (1) $ 91,679,788 100.0 % $ 93,047,209 100.0 % Total LHFI: Fixed rate $ 63,946,587 69.7 % $ 65,960,370 70.9 % Variable rate 27,733,201 30.3 % 27,086,839 29.1 % Total LHFI (1) $ 91,679,788 100.0 % $ 93,047,209 100.0 % (1) Total LHFI includes unamortized deferred loan fees, net of deferred origination costs; unamortized purchase premiums, net of discounts; unamortized participation fees; accretable subvention; as well as purchase accounting adjustments. These items resulted in a net positive adjustment to the loan balances of $497.2 million and $475.0 million as of March 31, 2024 and December 31, 2023, respectively. (2) Other commercial includes CEVF leveraged leases and loans. (3) Other consumer primarily includes RV and marine loans.
Summary of Allowance for Credit Losses by Portfolio Segment	The activity in the ACL by portfolio segment was as follows for the periods indicated: Three months ended March 31, 2024 (in thousands) Commercial Consumer Total ALLL, beginning of period $ 616,788 $ 6,315,265 $ 6,932,053 Credit loss (benefit) / expense (15,855) 424,389 408,534 Charge-offs (23,776) (1,244,661) (1,268,437) Recoveries 12,790 657,184 669,974 Charge-offs, net of recoveries $ (10,986) $ (587,477) $ (598,463) ALLL, end of period $ 589,947 $ 6,152,177 $ 6,742,124 Reserve for unfunded lending commitments, beginning of period $ 55,846 $ 4,916 $ 60,762 Credit loss (benefit) on unfunded lending commitments (2,979) (557) (3,536) Reserve for unfunded lending commitments, end of period $ 52,867 $ 4,359 $ 57,226 Total ACL, end of period $ 642,814 $ 6,156,536 $ 6,799,350 Three months ended March 31, 2023 (in thousands) Commercial Consumer Total ALLL, beginning of period $ 562,216 $ 6,217,783 $ 6,779,999 Day 1: Adjustment to allowance for adoption of ASU 2022-02 4,986 50,254 55,240 Credit loss expense 21,478 520,771 542,249 Charge-offs (26,866) (1,119,100) (1,145,966) Recoveries 19,281 664,489 683,770 Charge-offs, net of recoveries $ (7,585) $ (454,611) $ (462,196) ALLL, end of period $ 581,095 $ 6,334,197 $ 6,915,292 Reserve for unfunded lending commitments, beginning of period $ 77,709 $ 7,873 $ 85,582 Credit loss (benefit) on unfunded lending commitments 166 (14) 152 Reserve for unfunded lending commitments, end of period $ 77,875 $ 7,859 $ 85,734 Total ACL, end of period $ 658,970 $ 6,342,056 $ 7,001,026
Summary of Non-accrual Loans	The amortized cost basis of financing receivables that are non-accrual and other non-performing assets disaggregated by class of financing receivables (as well as the amount of non-accrual loans for which no related allowance is recorded) are as follows at the dates indicated: Non-accrual loans and other non-performing assets as of: (1) Non-accrual loans with no related allowance (in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Non-accrual loans: Commercial: CRE $ 257,807 $ 267,537 $ 131,601 $ 64,383 C&I 159,037 143,504 847 2,230 Multifamily 102,024 97,228 17,684 17,801 Other commercial 7,320 5,621 — — Total commercial loans $ 526,188 $ 513,890 $ 150,132 $ 84,414 Consumer: Residential mortgages 51,648 52,718 5,720 5,898 Home equity loans and lines of credit 79,499 86,332 14,111 15,241 RICs and auto loans 1,829,983 2,194,509 139,077 153,850 Personal unsecured loans 20,302 21,267 1,844 1,776 Other consumer 13,598 15,733 49 152 Total consumer loans $ 1,995,030 $ 2,370,559 $ 160,801 $ 176,917 Total non-accrual loans $ 2,521,218 $ 2,884,449 $ 310,933 $ 261,331 OREO 19,422 24,246 — — Repossessed vehicles 267,545 265,368 — — Foreclosed and other repossessed assets 2,030 1,666 — — Total OREO and other repossessed assets $ 288,997 $ 291,280 $ — $ — Total non-performing assets $ 2,810,215 $ 3,175,729 $ 310,933 $ 261,331 (1) Interest income recognized on nonaccrual loans was $61.0 million and $49.1 million for the three months ended March 31, 2024 and March 31, 2023, respectively.
Summary of Aging Analysis of Loan Portfolio	The amortized cost of past due loans and accruing loans 90 days or greater past due disaggregated by class of financing receivables is summarized as follows at the dates indicated: As of: March 31, 2024 (in thousands) 30-89 90 Total Current Total Amortized Cost Commercial: CRE (2) $ 51,411 $ 136,449 $ 187,860 $ 9,281,429 $ 9,469,289 $ — C&I (1) 53,974 11,687 65,661 10,811,315 10,876,976 — Multifamily (4) 44,139 63,265 107,404 10,134,195 10,241,599 — Other commercial 28,392 3,295 31,687 7,452,439 7,484,126 — Consumer: Residential mortgages (3) 89,074 46,739 135,813 4,730,446 4,866,259 — Home equity loans and lines of credit 38,869 65,321 104,190 2,230,891 2,335,081 — RICs and auto loans 4,596,175 447,075 5,043,250 38,195,517 43,238,767 — Personal unsecured loans 78,384 41,283 119,667 3,591,824 3,711,491 7,917 Other consumer 1,492 257 1,749 50,802 52,551 — Total $ 4,981,910 $ 815,371 $ 5,797,281 $ 86,478,858 $ 92,276,139 $ 7,917 (1) C&I loans includes $51.7 million of LHFS at March 31, 2024. (2) CRE loans includes $395.7 million LHFS at March 31, 2024. (3) Residential mortgages include $139.7 million of LHFS at March 31, 2024. (4) Multifamily loans include $9.3 million of LHFS at March 31, 2024. As of: December 31, 2023 (in thousands) 30-89 90 Total Current Total Recorded Commercial: CRE (2) $ 98,799 $ 62,645 $ 161,444 $ 8,586,100 $ 8,747,544 $ — C&I (1) 54,367 12,260 66,627 11,246,726 11,313,353 — Multifamily (4) — 62,391 62,391 10,495,778 10,558,169 — Other commercial 48,075 3,260 51,335 7,424,778 7,476,113 — Consumer: Residential mortgages (3) 99,171 47,019 146,190 4,689,491 4,835,681 — Home equity loans and lines of credit 36,297 71,936 108,233 2,340,221 2,448,454 — RICs and auto loans 5,393,627 558,208 5,951,835 37,753,524 43,705,359 — Personal unsecured loans 84,379 44,389 128,768 3,933,932 4,062,700 7,947 Other consumer 2,213 345 2,558 57,396 59,954 — Total $ 5,816,928 $ 862,453 $ 6,679,381 $ 86,527,946 $ 93,207,327 $ 7,947 (1) C&I loans included $131.4 million of LHFS at December 31, 2023. (2) CRE loans includes $0.0 million of LHFS at December 31, 2023. (3) Residential mortgages included $19.5 million of LHFS at December 31, 2023 . (4) Multifamily loans include $9.3 million of LHFS at December 31, 2023.
Summary of Financing Receivable Credit Quality Indicators	Amortized cost basis of loans in the commercial portfolio segment by credit quality indicator, class of financing receivable, and year of origination are summarized as follows: March 31, 2024 Commercial Loan Portfolio (2) (dollars in thousands) Amortized Cost by Origination Year Regulatory Rating: 2024 (1) 2023 2022 2021 2020 Prior Total (3) CRE Pass $ 426,558 $ 411,544 $ 2,317,656 $ 1,777,346 $ 1,027,695 $ 1,868,070 $ 7,828,869 Special mention — 7,138 245,356 259,279 99,610 333,010 944,393 Substandard — — 129,599 180,066 63,802 274,071 647,538 Doubtful — — — — — 48,489 48,489 Total CRE $ 426,558 $ 418,682 $ 2,692,611 $ 2,216,691 $ 1,191,107 $ 2,523,640 $ 9,469,289 Current period gross write-offs - CRE $ — $ — $ — $ 1 $ — $ 662 $ 663 C&I Pass $ 106,439 $ 1,060,293 $ 2,630,707 $ 1,763,078 $ 833,338 $ 3,101,853 $ 9,495,708 Special mention 48 8,998 50,709 12,777 — 102,473 175,005 Substandard — 20 58,887 73,349 62,858 283,880 478,994 N/A 73,316 247,843 232,808 109,823 34,316 29,163 727,269 Total C&I $ 179,803 $ 1,317,154 $ 2,973,111 $ 1,959,027 $ 930,512 $ 3,517,369 $ 10,876,976 Current period gross write-offs - C&I $ — $ 2,582 $ 5,464 $ 2,502 $ 896 $ 6,568 $ 18,012 Multifamily Pass $ 40,964 $ 1,130,377 $ 2,899,579 $ 1,278,138 $ 942,397 $ 2,464,286 $ 8,755,741 Special mention — 123,607 131,695 143,150 — 214,976 613,428 Substandard — — 300,955 127,419 70,700 373,356 872,430 Total multifamily $ 40,964 $ 1,253,984 $ 3,332,229 $ 1,548,707 $ 1,013,097 $ 3,052,618 $ 10,241,599 Current period gross write-offs - Multifamily $ — $ — $ — $ — $ — $ 1,102 $ 1,102 Remaining commercial Pass $ 1,373,608 $ 2,185,241 $ 1,474,652 $ 1,008,566 $ 383,680 $ 1,043,265 $ 7,469,012 Special mention — — 325 3,289 — 1,194 4,808 Substandard — 758 2,299 1,648 656 4,945 10,306 Total remaining commercial $ 1,373,608 $ 2,185,999 $ 1,477,276 $ 1,013,503 $ 384,336 $ 1,049,404 $ 7,484,126 Current period gross write-offs - Remaining commercial $ — $ 280 $ 13 $ 21 $ — $ 3,685 $ 3,999 Total commercial loans Pass $ 1,947,569 $ 4,787,455 $ 9,322,594 $ 5,827,128 $ 3,187,110 $ 8,477,474 $ 33,549,330 Special mention 48 139,743 428,085 418,495 99,610 651,653 1,737,634 Substandard — 778 491,740 382,482 198,016 936,252 2,009,268 Doubtful — — — — — 48,489 48,489 N/A 73,316 247,843 232,808 109,823 34,316 29,163 727,269 Total commercial loans $ 2,020,933 $ 5,175,819 $ 10,475,227 $ 6,737,928 $ 3,519,052 $ 10,143,031 $ 38,071,990 Current period gross write-offs - Total commercial $ — $ 2,862 $ 5,477 $ 2,524 $ 896 $ 12,017 $ 23,776 (1) Loans originated during the three months ended March 31, 2024. (2) Includes $456.7 million of LHFS at March 31, 2024. (3) Includes $19.5 million revolving loans converted to term loans. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) December 31, 2023 Commercial Loan Portfolio (2) (dollars in thousands) Amortized Cost by Origination Year Regulatory Rating: 2023 (1) 2022 2021 2020 2019 Prior Total (3) CRE Pass $ 353,350 $ 1,947,060 $ 1,800,140 $ 1,108,882 $ 674,347 $ 1,343,095 $ 7,226,874 Special mention 3,747 178,287 145,212 102,550 245,385 114,666 789,847 Substandard — 112,872 188,061 63,806 85,138 232,168 682,045 Doubtful — — — — 48,778 — 48,778 Total CRE $ 357,097 $ 2,238,219 $ 2,133,413 $ 1,275,238 $ 1,053,648 $ 1,689,929 $ 8,747,544 Current period gross write-offs - CRE $ — $ — $ 37,982 $ — $ 28,626 $ 8,637 $ 75,245 C&I Pass $ 1,073,864 $ 2,930,616 $ 1,941,561 $ 1,002,562 $ 993,395 $ 1,923,607 $ 9,865,605 Special mention 6,256 96,218 4,695 2,668 10,686 139,360 259,883 Substandard 100 14,786 82,563 70,458 50,881 230,798 449,586 N/A 272,220 259,671 126,449 41,229 32,916 5,794 738,279 Total C&I $ 1,352,440 $ 3,301,291 $ 2,155,268 $ 1,116,917 $ 1,087,878 $ 2,299,559 $ 11,313,353 Current period gross write-offs - C&I $ 3,440 $ 20,806 $ 12,749 $ 5,012 $ 11,287 $ 19,224 $ 72,518 Multifamily Pass $ 1,147,959 $ 3,000,968 $ 1,358,513 $ 949,385 $ 1,422,205 $ 1,289,127 $ 9,168,157 Special mention 116,789 107,137 101,850 — 160,535 72,513 558,824 Substandard — 302,057 128,023 61,041 172,983 167,084 831,188 Total multifamily $ 1,264,748 $ 3,410,162 $ 1,588,386 $ 1,010,426 $ 1,755,723 $ 1,528,724 $ 10,558,169 Current period gross write-offs - Multifamily $ — $ — $ — $ — $ 1,267 $ 2,684 $ 3,951 Remaining commercial Pass $ 3,154,497 $ 1,598,202 $ 1,157,726 $ 491,229 $ 248,309 $ 811,827 $ 7,461,790 Special mention — 355 3,624 — — 1,410 5,389 Substandard 283 2,262 1,524 765 311 3,789 8,934 Total remaining commercial $ 3,154,780 $ 1,600,819 $ 1,162,874 $ 491,994 $ 248,620 $ 817,026 $ 7,476,113 Current period gross write-offs - Remaining commercial $ 205 $ — $ 27 $ — $ — $ 6,211 $ 6,443 Total commercial loans Pass $ 5,729,670 $ 9,476,846 $ 6,257,940 $ 3,552,058 $ 3,338,256 $ 5,367,656 $ 33,722,426 Special mention 126,792 381,997 255,381 105,218 416,606 327,949 1,613,943 Substandard 383 431,977 400,171 196,070 309,313 633,839 1,971,753 Doubtful — — — — 48,778 — 48,778 N/A 272,220 259,671 126,449 41,229 32,916 5,794 738,279 Total commercial loans $ 6,129,065 $ 10,550,491 $ 7,039,941 $ 3,894,575 $ 4,145,869 $ 6,335,238 $ 38,095,179 Current period gross write-offs - Total commercial $ 3,645 $ 20,806 $ 50,758 $ 5,012 $ 41,180 $ 36,756 $ 158,157 (1) Loans originated during the year ended December 31, 2023. (2) Includes $140.7 million of LHFS at December 31, 2023. (3) Includes $126.6 million revolving loans converted to term loans. Consumer financing receivables for which either an internal or external credit score is a core component of the allowance model are summarized by credit score determined at origination as follows: RICs and Auto Loans As of March 31, 2024 RICs and auto loans (dollars in thousands) Amortized Cost by Origination Year (3) Credit Score Range 2024 (1) 2023 2022 2021 2020 Prior Total Percent No FICO (2) $ 351,986 $ 951,574 $ 663,701 $ 386,928 $ 164,092 $ 140,861 $ 2,659,142 6.1 % <600 1,717,899 5,123,759 3,787,821 2,460,390 945,612 994,526 15,030,007 34.8 % 600-639 1,012,644 3,010,813 2,226,481 1,166,610 379,354 351,803 8,147,705 18.8 % 640-679 658,565 1,884,000 1,407,548 635,691 202,476 186,407 4,974,687 11.5 % 680-719 463,654 1,396,779 981,350 545,012 234,360 158,661 3,779,816 8.7 % 720-759 294,537 901,701 748,759 517,135 224,668 115,983 2,802,783 6.6 % >=760 546,536 1,395,386 1,664,572 1,442,340 569,317 226,476 5,844,627 13.5 % Total $ 5,045,821 $ 14,664,012 $ 11,480,232 $ 7,154,106 $ 2,719,879 $ 2,174,717 $ 43,238,767 100.0 % Current period gross write-offs - RICs and auto loans $ 1,094 $ 423,021 $ 379,004 $ 195,396 $ 59,777 $ 73,251 $ 1,131,543 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. As of December 31, 2023 RICs and auto loans (dollars in thousands) Amortized Cost by Origination Year (3) Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 1,075,125 $ 763,677 $ 445,542 $ 193,922 $ 120,752 $ 61,909 $ 2,660,927 6.1 % <600 5,578,707 4,219,184 2,791,141 1,093,652 778,438 458,350 14,919,472 34.1 % 600-639 3,324,732 2,483,763 1,324,435 439,996 303,441 138,715 8,015,082 18.3 % 640-679 2,535,908 1,567,064 718,649 234,883 169,431 69,668 5,295,603 12.1 % 680-719 1,754,195 1,092,896 612,871 268,978 159,209 39,934 3,928,083 9.0 % 720-759 1,052,128 830,476 583,392 256,724 122,537 24,692 2,869,949 6.6 % >=760 1,574,026 1,847,059 1,644,605 654,214 267,443 28,896 6,016,243 13.8 % Total $ 16,894,821 $ 12,804,119 $ 8,120,635 $ 3,142,369 $ 1,921,251 $ 822,164 $ 43,705,359 100.0 % Current period gross write-offs - RICs and auto loans $ 479,992 $ 1,943,905 $ 1,052,016 $ 366,896 $ 245,621 $ 194,308 $ 4,282,738 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. (3) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Personal unsecured loans As of March 31, 2024 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2024 (1) 2023 2022 2021 2020 Prior Total Percent No FICO (2) $ 7,351 $ — $ — $ — $ — $ 48 $ 7,399 0.2 % <600 3 53 41 105 21 2,882 3,105 0.1 % 600-639 72 6,739 9,648 1,038 352 5,640 23,489 0.6 % 640-679 8,481 156,270 194,299 24,571 2,961 32,020 418,602 11.3 % 680-719 50,350 548,420 541,476 95,491 7,564 69,186 1,312,487 35.4 % 720-759 60,304 459,873 426,872 105,254 7,367 69,117 1,128,787 30.4 % >=760 59,595 314,592 277,828 85,337 8,427 71,843 817,622 22.0 % Total $ 186,156 $ 1,485,947 $ 1,450,164 $ 311,796 $ 26,692 $ 250,736 $ 3,711,491 100.0 % Current period gross write-offs - Personal unsecured loans $ — $ 34,328 $ 56,646 $ 16,118 $ 667 $ 2,064 $ 109,823 (1) Loans originated during the three months ended March 31, 2024. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model. As of December 31, 2023 Personal Unsecured loans (dollars in thousands) Amortized Cost by Origination Year Credit Score Range 2023 (1) 2022 2021 2020 2019 Prior Total Percent No FICO (2) $ 8,080 $ — $ — $ — $ — $ 49 $ 8,129 0.2 % <600 40 62 57 35 32 2,883 3,109 0.1 % 600-639 7,634 11,300 1,205 418 390 5,752 26,699 0.7 % 640-679 175,427 228,631 30,445 3,442 2,479 31,341 471,765 11.6 % 680-719 610,259 599,431 154,687 10,264 5,721 69,897 1,450,259 35.6 % 720-759 511,424 444,493 181,398 15,625 5,847 70,518 1,229,305 30.3 % >=760 350,721 274,043 148,550 20,357 6,020 73,743 873,434 21.5 % Total $ 1,663,585 $ 1,557,960 $ 516,342 $ 50,141 $ 20,489 $ 254,183 $ 4,062,700 100.0 % Current period gross write-offs - Personal unsecured loans $ 30,001 $ 179,550 $ 75,237 $ 4,837 $ 2,205 $ 5,621 $ 297,451 (1) Loans originated during the year ended December 31, 2023. (2) Consists primarily of loans for which credit scores are not available or are not considered in the ALLL model.
Summary of Financing Receivable by LTV	=760 — 160,616 769,983 633,093 348,670 1,166,229 3,078,591 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — Current period gross write-offs - Residential mortgages $ — $ 33 $ 22 $ — $ 16 $ 182 $ 253 Home equity LTV ratios No LTV available (2) $ — $ 1,577 $ 3,904 $ 3,848 $ 3,747 $ 53,593 $ 66,669 $ 42,375 <= 70% — 43,661 168,205 179,258 230,879 1,737,887 2,359,890 2,285,157 70.01% - 110% — 3,742 1,968 — 23 13,630 19,363 16,576 Greater than 110% — 607 156 — — 1,769 2,532 2,532 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 FICO scores No FICO score available $ — $ 703 $ 2,471 $ 2,597 $ 3,328 $ 52,044 $ 61,143 $ 36,854 <600 — 430 2,774 3,942 6,652 126,607 140,405 123,232 600-679 — 3,325 8,624 9,080 24,357 215,826 261,212 242,747 680-759 — 16,781 60,151 61,256 73,166 576,663 788,017 771,495 >=760 — 28,348 100,213 106,231 127,146 835,739 1,197,677 1,172,312 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 Current period gross write-offs - home equity $ — $ — $ — $ 253 $ 17 $ 1,330 $ 1,600 (1) Loans originated during the year ended December 31, 2023. The Company ceased origination of new residential mortgage and home equity loans in 2022. (2) Balances in the "No LTV available" or "No FICO score available" ranges primarily represent loans serviced by others, in run-off portfolios or for which a current LTV or FICO score is unavailable. (3) The ALLL model considers LTV for financing receivables in first lien position and CLTV for financing receivables in second lien position for the Company. (4) Excludes LHFS." id="sjs-B9">Residential mortgage and home equity financing receivables by LTV and FICO range are summarized as follows: As of March 31, 2024 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2024 (1) 2023 (1) 2022 2021 2020 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,747 $ 2,747 $ — <= 70% — — 189,887 1,019,015 867,980 2,504,019 4,580,901 — 70.01% - 110% — — 81,541 55,319 — 5,681 142,541 — Greater than 110% — — — — — 372 372 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 3,507 $ 3,507 $ — <600 — — 12,524 20,550 15,271 145,170 193,515 — 600-679 — — 21,964 47,937 31,063 220,680 321,644 — 680-759 — — 70,445 220,738 192,388 661,083 1,144,654 — >=760 — — 166,495 785,109 629,258 1,482,379 3,063,241 — Total residential mortgages $ — $ — $ 271,428 $ 1,074,334 $ 867,980 $ 2,512,819 $ 4,726,561 $ — Current period gross write-offs - Residential mortgages $ — $ — $ — $ — $ — $ 12 $ 12 Home equity LTV ratios No LTV available (2) $ — $ — $ 1,714 $ 4,591 $ 4,418 $ 56,733 $ 67,456 $ 43,745 <= 70% — — 42,007 160,111 170,856 1,875,850 2,248,824 2,174,539 70.01% - 110% — — 3,883 1,409 — 11,602 16,894 14,133 Greater than 110% — — 621 154 — 1,132 1,907 1,907 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 FICO scores No FICO score available $ — $ — $ 724 $ 2,495 $ 2,631 $ 54,444 $ 60,294 $ 36,587 <600 — — 697 2,913 5,403 135,875 144,888 126,879 600-679 — — 1,915 9,421 9,460 227,775 248,571 231,058 680-759 — — 17,432 52,431 58,706 622,422 750,991 733,658 >=760 — — 27,457 99,005 99,074 904,801 1,130,337 1,106,142 Total home equity $ — $ — $ 48,225 $ 166,265 $ 175,274 $ 1,945,317 $ 2,335,081 $ 2,234,324 Current period gross write-offs - home equity $ — $ — $ — $ — $ — $ 2,507 $ 2,507 (1) Loans originated during the three months ended March 31, 2024. The Company ceased origination of new residential mortgage and home equity loans in 2022. (2) Balances in the "No LTV available" or "No FICO score available" ranges primarily represent loans serviced by others, in run-off portfolios or for which a current LTV or FICO score is unavailable. (3) The ALLL model considers LTV for financing receivables in first lien position and CLTV for financing receivables in second lien position for the Company. (4) Excludes LHFS. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) As of December 31, 2023 Amortized Cost by Origination Year (4) (dollars in thousands) Residential mortgages 2023 (1) 2022 2021 2020 2019 Prior Grand Total Revolving Loans LTV ratios (3) No LTV available (2) $ — $ — $ — $ — $ — $ 2,156 $ 2,156 $ — <= 70% — 190,214 1,024,024 880,476 590,828 1,977,309 4,662,851 — 70.01% - 110% — 83,925 61,624 — — 5,287 150,836 — Greater than 110% — — — — — 375 375 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — FICO scores No FICO score available $ — $ — $ — $ — $ — $ 2,926 $ 2,926 $ — <600 — 9,909 15,601 13,053 30,094 109,302 177,959 — 600-679 — 20,516 43,327 32,157 51,103 189,585 336,688 — 680-759 — 83,098 256,737 202,173 160,961 517,085 1,220,054 — >=760 — 160,616 769,983 633,093 348,670 1,166,229 3,078,591 — Total residential mortgages $ — $ 274,139 $ 1,085,648 $ 880,476 $ 590,828 $ 1,985,127 $ 4,816,218 $ — Current period gross write-offs - Residential mortgages $ — $ 33 $ 22 $ — $ 16 $ 182 $ 253 Home equity LTV ratios No LTV available (2) $ — $ 1,577 $ 3,904 $ 3,848 $ 3,747 $ 53,593 $ 66,669 $ 42,375 <= 70% — 43,661 168,205 179,258 230,879 1,737,887 2,359,890 2,285,157 70.01% - 110% — 3,742 1,968 — 23 13,630 19,363 16,576 Greater than 110% — 607 156 — — 1,769 2,532 2,532 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 FICO scores No FICO score available $ — $ 703 $ 2,471 $ 2,597 $ 3,328 $ 52,044 $ 61,143 $ 36,854 <600 — 430 2,774 3,942 6,652 126,607 140,405 123,232 600-679 — 3,325 8,624 9,080 24,357 215,826 261,212 242,747 680-759 — 16,781 60,151 61,256 73,166 576,663 788,017 771,495 >=760 — 28,348 100,213 106,231 127,146 835,739 1,197,677 1,172,312 Total home equity $ — $ 49,587 $ 174,233 $ 183,106 $ 234,649 $ 1,806,879 $ 2,448,454 $ 2,346,640 Current period gross write-offs - home equity $ — $ — $ — $ 253 $ 17 $ 1,330 $ 1,600 (1) Loans originated during the year ended December 31, 2023. The Company ceased origination of new residential mortgage and home equity loans in 2022. (2) Balances in the "No LTV available" or "No FICO score available" ranges primarily represent loans serviced by others, in run-off portfolios or for which a current LTV or FICO score is unavailable. (3) The ALLL model considers LTV for financing receivables in first lien position and CLTV for financing receivables in second lien position for the Company. (4) Excludes LHFS.
Summary of Loan Modifications	The following table shows the amortized cost basis at the end of the reporting period for loans modified during the reporting period to borrowers experiencing financial difficulty, disaggregated by class of financing receivable and type of modification granted. Short-term modifications (three months or less) are not included in these tables. NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) Payment Deferral Only Three months ended Three months ended March 31, 2024 March 31, 2023 (dollars in thousands) Amortized Cost % of Total Class of Financing Receivable Amortized Cost % of Total Class of Financing Receivable Commercial: CRE $ 98,453 1.04 % $ 190 — % C&I 1,910 0.02 % 1,926 0.01 % Other commercial 51 — % — — % Consumer: RICs and auto loans 245,019 0.57 % 240,897 0.56 % Total $ 345,433 0.37 % $ 243,013 0.25 % All Other Modifications Three months ended Three months ended March 31, 2024 March 31, 2023 (dollars in thousands) Amortized Cost % of Total Class of Financing Receivable Amortized Cost % of Total Class of Financing Receivable Commercial: C&I $ 948 0.01 % $ 798 0.01 % Consumer: Residential mortgages 290 0.01 % — — % Home equity loans and lines of credit 2,134 0.09 % 653 0.02 % RICs and auto loans 33,567 0.08 % 193,357 0.44 % Other consumer 43 0.08 % — — Total $ 36,982 0.04 % $ 194,808 0.20 % NOTE 3. LOANS AND ALLOWANCE FOR CREDIT LOSSES (continued) The following table describes the financial effects of the modifications made to borrowers experiencing financial difficulty: Loan Type Modification Type Financial Effect RICs and auto loans Payment deferral Provide payment deferrals to borrowers through our deferral program, which allows a customer to defer payments for a maximum of up to eight months over the life of the loan. The deferred payments are added to the end of the original loan term. Commercial loans Payment deferral Provide payment deferrals to commercial borrowers through our deferral program. The deferred payments are added to the end of the original loan term. Consumer secured by real estate All other modification types Provide modifications consisting of a combination of term extension, interest rate reduction, and/or deferment of principal on a case-by-case basis to determine which benefit or combination of benefits will be offered to achieve the target DTI range. RICs and auto loans All other modification types Provides reduction in interest rate and maturity date extension of up to 36 months beyond the current maturity date resulting in reduction to monthly payment. Amortized Cost As of March 31, 2024 (in thousands) Current 30-89 DPD 90+ DPD Commercial: CRE $ 256,931 $ 13,083 $ 7,144 C&I 47,701 6,661 378 Multifamily 8,885 15,348 8,536 Other commercial 318 — 51 Consumer: Residential mortgages 4,568 104 — Home equity loans and lines of credit 6,297 509 146 RICs and auto loans 725,914 271,635 21,709 Other consumer 30 — 13 Total $ 1,050,644 $ 307,340 $ 37,977 Amortized Cost (1) As of March 31, 2023 (in thousands) Current 30-89 DPD 90+ DPD Commercial: CRE $ 190 $ — $ — C&I 2,452 272 — Consumer: Home equity loans and lines of credit 631 22 — RICs and auto loans 395,337 38,570 347 Total $ 398,610 $ 38,864 $ 347 (1) Reflects the adoption of ASU 2022-02 on January 1, 2023 and includes only loans modified after January 1, 2023.
Financing Receivable, Modified, Subsequent Default	The following table provides the amortized cost basis of financing receivables that had a payment default during the period and were modified in the 12-month period prior to default due to the borrower's financial difficulty: Amortized Cost Three months ended March 31, 2024 Payment deferral All other modification types (in thousands) Commercial: C&I 90 68 Consumer: RICs and auto loans 28,428 8,913 Total $ 28,518 $ 8,981 Amortized Cost (1) Three months ended March 31, 2023 Payment deferral All other modification types (in thousands) Consumer: RICs and auto loans 313 494 Total $ 313 $ 494 (1) Reflects the adoption of ASU 2022-02 on January 1, 2023 and includes only loans modified after January 1, 2023.

OPERATING LEASE ASSETS, NET (Ta

OPERATING LEASE ASSETS, NET (Tables)	3 Months Ended
	Mar. 31, 2024
Leases [Abstract]
Summary of Operating Lease Assets, Net	Operating lease assets, net consisted of the following as of the periods indicated: (in thousands) March 31, 2024 December 31, 2023 Leased vehicles $ 17,064,556 $ 17,548,952 Less: accumulated depreciation (3,255,044) (3,546,875) Depreciated net capitalized cost $ 13,809,512 $ 14,002,077 Manufacturer subvention payments, net of accretion (636,292) (593,004) Unamortized origination fees and other costs 468,917 373,767 Leased vehicles, net $ 13,642,137 $ 13,782,840 Commercial equipment vehicles and aircraft, gross $ — $ — Less: accumulated depreciation — — Commercial equipment vehicles and aircraft, net $ — $ — Total operating lease assets, net $ 13,642,137 $ 13,782,840
Summary of Future Minimum Rental Payments Due to the Company Under Operating Leases	The following summarizes the future minimum rental payments due to the Company as lessor under operating leases as of March 31, 2024 (in thousands): 2024 $ 1,629,446 2025 1,552,937 2026 810,714 2027 73,060 2028 74 Thereafter — Total $ 4,066,231

GOODWILL AND OTHER INTANGIBLES

GOODWILL AND OTHER INTANGIBLES (Tables)	3 Months Ended
	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill	The following table presents the balance of the Company's goodwill by its reporting units for the periods indicated: (in thousands) Auto CBB C&I CRE CIB Total December 31, 2023 and March 31, 2024 $ 1,238,676 $ 159,027 $ 52,198 $ 1,015,130 $ 301,634 $ 2,766,665
Summary of Finite-Lived Intangible Assets	The following table details amounts related to the Company's intangible assets subject to amortization for the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Net Carrying Accumulated Net Carrying Accumulated Intangibles subject to amortization: Dealer networks $ 231,083 $ (238,917) $ 236,958 $ (233,042) Stellantis relationship 4,515 (134,235) 5,436 (133,314) Other intangibles 41,979 (50,325) 44,765 (47,539) Total intangibles subject to amortization $ 277,577 $ (423,477) $ 287,159 $ (413,895)
Summary of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated aggregate amortization expense related to intangibles, excluding any impairment charges, for each of the five succeeding calendar years ending December 31 is: Year Calendar Year Amount Recorded To Date Remaining Amount To Record (in thousands) 2024 $ 37,900 $ 9,581 $ 28,319 2025 34,783 — 34,783 2026 32,492 — 32,492 2027 28,646 — 28,646 2028 26,340 — 26,340 Thereafter 126,997 — 126,997

OTHER ASSETS (Tables)

OTHER ASSETS (Tables)	3 Months Ended
	Mar. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Summary of Other Assets	The following is a detail of items that comprised Other assets at the peri ods indicated: (in thousands) March 31, 2024 December 31, 2023 Operating lease ROU assets $ 397,251 $ 435,633 Deferred tax assets 235,025 234,309 Accrued interest receivable 823,415 827,704 Derivative assets at fair value 1,160,331 1,090,194 Other real estate owned and other repossessed assets 288,997 291,280 Equity method investments 321,078 306,313 MSRs 95,776 94,266 Income tax receivables 428,316 478,305 Prepaid expense 257,089 242,273 Miscellaneous assets and receivables 880,298 583,607 Total Other assets $ 4,887,576 $ 4,583,884
Summary of Maturity of Lease Liabilities	Supplemental balance sheet information related to leases was as follows: Maturity of Lease Liabilities at March 31, 2024 Total Operating leases (in thousands) 2024 $ 103,668 2025 117,580 2026 89,377 2027 77,253 2028 43,490 Thereafter 95,084 Total lease liabilities $ 526,452 Less: Interest (42,083) Present value of lease liabilities $ 484,369
Summary of Operating Lease Term, Rate and Other Information	Supplemental Balance Sheet Information March 31, 2024 December 31, 2023 Operating lease ROU assets $397,251 $435,633 Other liabilities $484,369 $511,400 Weighted-average remaining lease term (years) 5.6 5.6 Weighted-average discount rate 3.1% 3.1% Three months ended March 31, Other Information 2024 2023 (in thousands) Operating cash flows from operating leases (1) $ (35,699) $ (38,391) Leased assets obtained in exchange for new operating lease liabilities $ 6,286 $ 14,257 (1) Activity is included within the net change in other liabilities on the SCF.

VIEs (Tables)

VIEs (Tables)	3 Months Ended
	Mar. 31, 2024
Variable Interest Entity and Securitizations [Abstract]
Summary of Variable Interest Entities	The assets and liabilities of consolidated VIEs included the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Assets Restricted cash $ 1,003,547 $ 864,464 LHFI 25,065,413 25,144,797 Operating lease assets, net (1) 13,642,137 13,782,840 Various other assets 701,005 637,987 Total Assets $ 40,412,102 $ 40,430,088 Liabilities Notes payable $ 25,699,422 $ 25,087,655 Various other liabilities 111,313 119,280 Total Liabilities $ 25,810,735 $ 25,206,935 ( 1) As noted above, all leased vehicles are originated through a titling trust. At March 31, 2024 and December 31, 2023, $7.0 billion and $7.8 billion, respectively, of leased vehicle assets included in this amount were in a titling trust, but not in a securitization trust.
Summary of Cash Flows Received	A summary of the cash flows received from the consolidated Trusts for the respective periods is as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 Assets securitized $ 5,234,923 $ 1,382,583 Net proceeds from new securitizations (1) $ 4,011,360 $ 792,050 Net proceeds on retained bonds from new securitizations 733,880 255,669 Cash received for servicing fees (2) 222,352 240,381 Net distributions from Trusts (2) 1,038,012 572,348 Total cash received from Trusts $ 6,005,604 $ 1,860,448 (1) Includes additional advances on existing securitizations. (2) These amounts are not reflected in the SCF because the cash flows are between the VIEs and other entities included in the consolidation.
Summary of Securitization Transactions	A summary of cash flows received from Trusts for the respective periods were as follows for the periods indicated: Three months ended March 31, (in thousands) 2024 2023 Receivables securitized (1) 1,060,931 — Net proceeds from new securitizations 1,003,695 — Cash received for servicing fees $ 1,344 $ 2,060 Total cash received from Trusts $ 1,005,039 $ 2,060 (1) Represents the UPB at the time of original securitization.

DEPOSITS AND OTHER CUSTOMER A_2

DEPOSITS AND OTHER CUSTOMER ACCOUNTS (Tables)	3 Months Ended
	Mar. 31, 2024
Deposits [Abstract]
Summary of Deposits and Other Customer Accounts	Deposits and other customer accounts are summarized as follows at the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Balance Percent of total deposits Balance Percent of total deposits Interest-bearing demand deposits $ 12,251,256 15.8 % $ 11,591,982 15.0 % Non-interest-bearing demand deposits 15,177,900 19.5 % 15,504,947 20.1 % Savings 4,213,934 5.4 % 4,428,281 5.7 % Customer repurchase accounts 240,728 0.3 % 238,523 0.3 % Money market 25,037,492 32.3 % 25,361,575 33.0 % CDs 20,763,160 26.7 % 19,947,868 25.9 % Total deposits (1) $ 77,684,470 100.0 % $ 77,073,176 100.0 % (1) Includes foreign deposits, as defined by the FRB, of $5.2 billion and $5.4 billion at March 31, 2024 and December 31, 2023, respectively.

BORROWINGS (Tables)

BORROWINGS (Tables)	3 Months Ended
	Mar. 31, 2024
Debt Disclosure [Abstract]
Summary of Borrowings and Other Debt Obligation	The following table presents information regarding the Parent Company and its subsidiaries' borrowings and other debt obligations at the dates indicated: March 31, 2024 December 31, 2023 (dollars in thousands) Balance Effective Balance Effective Parent Company 3.50% senior notes due June 2024 (1) $ 999,813 3.50 % $ 999,559 3.50 % 3.45% senior notes due June 2025 998,634 3.45 % 998,329 3.45 % 4.26% senior notes due June 2025 499,842 4.43 % 499,634 4.43 % 4.50% senior notes due July 2025 1,099,104 4.50 % 1,098,937 4.50 % Senior notes due April 2026 (2) 433,464 6.01 % 433,450 6.02 % 5.81% senior sustainability notes due September 2026 499,212 5.92 % 499,082 5.92 % 3.24% senior notes due October 2026 932,325 3.24 % 930,768 3.24 % 6.89% senior notes due June 2027 (1) 750,000 6.89 % 750,000 6.89 % 4.40% senior notes due July 2027 1,049,651 4.40 % 1,049,641 4.40 % 2.49% senior notes due January 2028 997,776 2.57 % 997,582 2.57 % 6.50% senior notes due March 2029 996,758 6.59 % 996,580 6.59 % 6.57% senior notes due June 2029 498,130 6.67 % 498,034 6.67 % 6.17% senior notes due January 2030 996,259 6.26 % — — % 7.66% senior notes due November 2031 497,847 7.73 % 497,797 7.73 % 2.88% subordinated notes, due November 2031 (1) 500,000 2.88 % 500,000 2.88 % 7.18% subordinated notes due December 2032 (1) 500,000 7.18 % 500,000 7.18 % Total Parent Company borrowings 12,248,815 11,249,393 Subsidiaries Short-term borrowing due within one year, maturing thru March 2024 $ — — % $ 427,531 4.66 % Short-term borrowing due within one year, maturing thru June 2024 260,786 4.19 % — — % FHLB advances, maturing through April 2027 4,951,510 4.93 % 6,584,791 5.04 % Credit-linked notes due December 2031 (3) 74,156 3.81 % 89,812 3.51 % Credit-linked notes due May 2032 (4) 181,549 7.56 % 214,941 7.25 % Credit-linked notes due August 2032 (5) 160,484 9.60 % 188,282 9.12 % Credit-linked notes due December 2032 (6) 218,327 10.51 % 246,497 10.16 % Credit-linked notes due June 2033 (7) 80,822 10.59 % 89,787 10.26 % Credit Linked notes due December 2033 (8) 205,108 9.25 % 206,033 9.24 % Credit-linked notes due February 2052 (9) (11) 115,520 11.92 % 118,246 11.92 % 6.98% senior notes due October 2025 (1) 2,000,000 6.98 % 2,000,000 6.98 % Warehouse lines maturing through February 2026 (10) 3,371,578 7.61 % 3,618,378 6.93 % Secured structured financings maturing through December 2031 20,042,692 0.48% - 7.69% 19,110,360 0.48% - 7.69% Total subsidiary borrowings and other debt obligations 31,662,532 32,894,658 Total Parent Company and subsidiaries' borrowings and other debt obligations $ 43,911,347 $ 44,144,051 (1) These notes are payable to SHUSA's parent company, Santander. (2) These notes bear interest at a rate equal to the SOFR index rate plus 135 basis points per year. (3) Issued in December 2021 in the amount of $298.0 million. Notes are tied to the performance of a $2.0 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $36.0 million. (4) Issued in June 2022 in the amount of $521.5 million. Notes are tied to the performance of a $3.5 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $63.0 million. (5) Issued in September 2022 in the amount of $374.5 million. Notes are tied to the performance of a $3.5 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $63.0 million. (6) Issued in December 2022 in the amount of $388.4 million. Notes are tied to the performance of a $3.6 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $65.3 million. (7) Issued in June 2023 in the amount of $115.5 million. Notes are tied to the performance of a $1.1 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $22.0 million. (8) Issued in December 2023 in the amount of $207.8 million. Notes are tied to the performance of a $2.1 billion original reference pool of SBNA prime auto loans. The contractual residual amount is $62.3 million. (9) Issued in January 2023 in the amount of $131.6 million. Notes are tied to the performance of a $2.5 billion original reference pool of SBNA residential mortgage loans. The contractual residual amount is $5.1 million. (10) Benchmark rates used included commercial paper, daily simple SOFR, one-month term SOFR, and three-month term SOFR. (11) Variable rate notes issued in tranches that bear interest at a rate equal to SOFR index plus varying spreads ranging from 4.15% to 13.90% and reset monthly. The following tables present information regarding the Company's warehouse lines at the dates indicated: March 31, 2024 (dollars in thousands) Balance Committed Amount Effective Assets Pledged Restricted Cash Pledged Warehouse line due April 2025 $ 250,700 $ 1,000,000 8.25 % $ 396,342 $ — Warehouse line due July 2025 273,000 600,000 7.07 % 326,067 3,236 Warehouse line due July 2025 26,200 500,000 12.41 % 38,594 — Warehouse line due October 2025 927,100 2,100,000 6.26 % 1,332,501 64 Warehouse line due November 2025 483,000 500,000 4.09 % 677,604 — Warehouse line due January 2026 999,500 1,000,000 10.82 % 1,450,629 2,598 Warehouse line due February 2026 412,078 700,000 6.59 % 611,351 506 Total credit facilities $ 3,371,578 $ 6,400,000 7.61 % $ 4,833,088 $ 6,404 The following tables present information regarding the Company's secured structured financings at the dates indicated: March 31, 2024 (dollars in thousands) Balance Initial Note Amounts Issued (3) Initial Weighted Average Interest Rate Range Collateral (2) Restricted Cash Public securitizations maturing on various dates through December 2031 (1) $ 17,109,213 $ 45,365,875 0.48% - 7.69% $ 26,620,341 $ 994,399 Privately issued amortizing notes maturing on various dates through August 2030 (3) 2,933,479 7,350,027 2.17% - 6.73% 4,827,740 2,742 Total secured structured financings $ 20,042,692 $ 52,715,902 0.48% - 7.69% $ 31,448,081 $ 997,141 (1) Securitizations executed under Rule 144A of the Securities Act are included within this balance. (2) Secured structured financings may be collateralized by collateral overages of other issuances. (3) Excludes securitizations which no longer have outstanding debt and excludes any incremental borrowings.

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2024
Equity [Abstract]
Summary of Accumulated Other Comprehensive Income / (Loss)	The following table presents the components of AOCI / (loss), net of related tax, for the periods indicated. Total Other Total Accumulated Three months ended March 31, 2024 December 31, 2023 March 31, 2024 (in thousands) Pre-tax Tax Net Activity Beginning Net Ending Net unrealized (losses)/gains on cash flow hedge derivative financial instruments 67,037 (15,738) 51,299 $ (254,519) $ 51,299 $ (203,220) Net unrealized (losses)/gains on investments in debt securities 18,594 (6,955) 11,639 (790,551) 11,639 (778,912) Pension and post-retirement actuarial gain / (loss) (3) 247 (64) 183 (20,498) 183 (20,315) As of March 31, 2024 $ 85,878 $ (22,757) $ 63,121 $ (1,065,568) $ 63,121 $ (1,002,447) (1) Net gains/(losses) reclassified into Interest on borrowings and other debt obligations in the Condensed Consolidated Statements of Operations for settlements of interest rate swap contracts designated as cash flow hedges. (2) Net (gains)/losses reclassified into Net gain on sale of investment securities sales in the Condensed Consolidated Statements of Operations for the sale of debt securities. (3) Included in the computation of net periodic pension costs. Total Other Total Accumulated Three months ended March 31, 2023 December 31, 2022 March 31, 2023 (in thousands) Pre-tax Tax Net Activity Beginning Net Ending Change in AOCI on cash flow hedge derivative financial instruments $ 120,728 $ (34,858) $ 85,870 Reclassification adjustment for net (gains)/losses on cash flow hedge derivative financial instruments (1) 3,856 (757) 3,099 Net unrealized gains/(losses) on cash flow hedge derivative financial instruments 124,584 (35,615) 88,969 $ (515,664) $ 88,969 $ (426,695) Change in unrealized (losses)/gains on investments in debt securities 25,602 (24,072) 1,530 Reclassification adjustment for net (gains)/losses included in net income/(expense) on debt securities AFS (2) 36,960 (7,255) 29,705 Net unrealized gains/(losses) on investments in debt securities 62,562 (31,327) 31,235 (796,572) 31,235 (765,337) Pension and post-retirement actuarial gain / (loss) (3) 655 (170) 485 (23,787) 485 (23,302) As of March 31, 2023 $ 187,801 $ (67,112) $ 120,689 $ (1,336,023) $ 120,689 $ (1,215,334)

SECURITIES FINANCING ACTIVITI_2

SECURITIES FINANCING ACTIVITIES (Tables)	3 Months Ended
	Mar. 31, 2024
Banking and Thrift, Other Disclosure [Abstract]
Summary of Securities Financing Transactions	Securities borrowed and purchased under agreements to resell, at their respective carrying values, consisted of the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Securities purchased under agreements to resell $ 7,628,806 $ 8,617,309 Securities borrowed 1,837,001 1,621,405 Total $ 9,465,807 $ 10,238,714 Securities loaned or sold under agreements to repurchase, at their respective carrying values, consisted of the following at the dates indicated: (in thousands) March 31, 2024 December 31, 2023 Securities sold under agreements to repurchase $ 16,164,434 $ 16,290,761 Securities lending 17 25 Total $ 16,164,451 $ 16,290,786
Summary of Offsetting Financial Assets	The amounts of securities financing assets or liabilities qualified for offset in the Condensed Consolidated Balance Sheets were as follows for the dates indicated. March 31, 2024 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 53,209,700 $ (45,580,894) $ 7,628,806 Securities borrowed 1,837,001 — 1,837,001 Total $ 55,046,701 $ (45,580,894) $ 9,465,807 March 31, 2024 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 61,745,328 $ (45,580,894) $ 16,164,434 Securities lending 17 — 17 Total $ 61,745,345 $ (45,580,894) $ 16,164,451 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. NOTE 11. SECURITIES FINANCING ACTIVITIES (continued) December 31, 2023 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 41,237,731 $ (32,620,422) $ 8,617,309 Securities borrowed 1,621,405 — 1,621,405 Total $ 42,859,136 $ (32,620,422) $ 10,238,714 December 31, 2023 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 48,911,183 $ (32,620,422) $ 16,290,761 Securities lending 25 — 25 Total 48,911,208 (32,620,422) 16,290,786 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. Information about financial assets and liabilities that are eligible for offset on the Condensed Consolidated Balance Sheets was as follows for the dates indicated: Offsetting of Financial Assets Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets Collateral Received (2) Net Amount March 31, 2024 Fair value hedges $ 66,931 $ — $ 66,931 $ (32,121) $ 34,810 Cash flow hedges 65,171 — 65,171 (62,168) 3,003 Other derivative activities (1) 1,060,412 (32,183) 1,028,229 (290,159) 738,070 Total Derivative Assets $ 1,192,514 $ (32,183) $ 1,160,331 $ (384,448) $ 775,883 December 31, 2023 Fair value hedges $ 38,904 $ — $ 38,904 $ (11,300) $ 27,604 Cash flow hedges 36,510 — 36,510 (22,935) 13,575 Other derivative activities (1) 1,016,844 (2,064) 1,014,780 (170,835) 843,945 Total Derivative Assets $ 1,092,258 $ (2,064) $ 1,090,194 $ (205,070) $ 885,124 (1) Includes customer-related and other derivatives. (2) Collateral received includes cash, cash equivalents, and other financial instruments. Cash collateral received is reported in Other liabilities, as applicable, in the Condensed Consolidated Balance Sheets. Financial instruments that are pledged to the Company are not reflected in the accompanying Condensed Consolidated Balance Sheets since the Company does not control or have the ability to re-hypothecate these instruments.
Summary of Offsetting Financial Liabilities	The amounts of securities financing assets or liabilities qualified for offset in the Condensed Consolidated Balance Sheets were as follows for the dates indicated. March 31, 2024 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 53,209,700 $ (45,580,894) $ 7,628,806 Securities borrowed 1,837,001 — 1,837,001 Total $ 55,046,701 $ (45,580,894) $ 9,465,807 March 31, 2024 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 61,745,328 $ (45,580,894) $ 16,164,434 Securities lending 17 — 17 Total $ 61,745,345 $ (45,580,894) $ 16,164,451 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. NOTE 11. SECURITIES FINANCING ACTIVITIES (continued) December 31, 2023 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 41,237,731 $ (32,620,422) $ 8,617,309 Securities borrowed 1,621,405 — 1,621,405 Total $ 42,859,136 $ (32,620,422) $ 10,238,714 December 31, 2023 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 48,911,183 $ (32,620,422) $ 16,290,761 Securities lending 25 — 25 Total 48,911,208 (32,620,422) 16,290,786 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. Offsetting of Financial Liabilities Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets Collateral Pledged (2) Net Amount March 31, 2024 Fair value hedges $ 2,475 $ — $ 2,475 $ (1,171) $ 1,304 Cash flow hedges 333,749 — 333,749 (139,635) 194,114 Other derivative activities (1) 1,078,768 (32,133) 1,046,635 (94,057) 952,578 Total Derivative Liabilities $ 1,414,992 $ (32,133) $ 1,382,859 $ (234,863) $ 1,147,996 December 31, 2023 Fair value hedges $ 9,951 $ — $ 9,951 (1,064) $ 8,887 Cash flow hedges 362,138 — 362,138 $ (140,968) 221,170 Other derivative activities (1) 1,102,608 (2,014) 1,100,594 (129,722) 970,872 Total Derivative Liabilities $ 1,474,697 $ (2,014) $ 1,472,683 $ (271,754) $ 1,200,929 (1) Includes customer-related and other derivatives. (2) Cash collateral pledged and financial instruments pledged is reported in Other assets in the Condensed Consolidated Balance Sheets. In certain instances, the Company is over-collateralized since the actual amount of collateral pledged exceeds the associated financial liability. As a result, the actual amount of collateral pledged that is reported in Other assets may be greater than the amount shown in the table above.
Summary of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets	The following tables present the gross amounts of liabilities associated with Securities Financing Activities by remaining contractual maturity as of the date indicated: March 31, 2024 (in thousands) Open and overnight Up to 30 days 31-90 days Greater than 90 days Total Securities sold under agreements to repurchase $ 28,748,667 $ 10,211,955 $ 13,625,513 $ 9,159,193 $ 61,745,328 Securities lending 17 — — — 17 Total $ 28,748,684 $ 10,211,955 $ 13,625,513 $ 9,159,193 $ 61,745,345 The following tables present the gross amounts of liabilities associated with Securities Financing Activities by class of underlying collateral as of the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Repurchase agreements Securities lending Total Repurchase agreements Securities lending Total U.S. Treasury $ 35,424,614 $ — $ 35,424,614 $ 29,251,978 $ — $ 29,251,978 Residential agency MBS 24,267,322 — 24,267,322 17,532,972 — 17,532,972 Corporate and other securities 2,053,392 17 2,053,409 2,126,233 25 2,126,258 Total $ 61,745,328 $ 17 $ 61,745,345 $ 48,911,183 $ 25 $ 48,911,208

DERIVATIVES (Tables)

DERIVATIVES (Tables)	3 Months Ended
	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Carrying Amount and Fair Value Hedge Adjustment	The carrying amount and fair value hedge adjustment of hedged assets at the dates indicated was: Carrying Amount of Hedged Assets Amount of Fair Value Hedge Adjustment Included in the Carrying Amount March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Debt securities AFS (Note 2) $ 2,243,603 $ 2,463,991 $ 81,397 $ 36,009
Summary of Derivative Instruments	Derivatives designated as accounting hedges included the following as of the dates indicated: (dollars in thousands) Notional Asset Liability Weighted Average Receive Rate Weighted Average Pay Weighted Average Life March 31, 2024 Fair value hedges: Cross-currency swaps $ 18,766 $ 170 $ 2,475 5.91 % 9.90 % 3.58 Interest rate swaps 6,475,000 66,761 — 2.75 % 3.48 % 2.77 Cash flow hedges: Pay fixed - receive variable interest rate swaps $ 5,559,350 $ 60,926 $ — 3.24 % 3.81 % 2.52 Pay variable - receive fixed interest rate swaps 11,075,000 4,245 333,523 1.96 % 1.84 % 1.21 Foreign exchange 20,000 — 226 — % — % 0.08 Total $ 23,148,116 $ 132,102 $ 336,224 2.49 % 2.78 % 1.96 December 31, 2023 Fair value hedges: Cross-currency swaps $ 18,766 $ 192 $ 2,235 5.91 % 9.90 % 3.83 Interest rate swaps 6,650,000 38,712 7,716 2.02 % 3.46 % 3.01 Cash flow hedges: Pay fixed — receive variable interest rate swaps $ 3,422,700 $ 22,935 $ 120 5.38 % 3.82 % 2.53 Pay variable - receive fixed interest rate swaps 11,925,000 13,575 362,018 1.83 % 1.64 % 1.30 Interest rate floor 250,000 — — — % — % 0.04 Total $ 22,266,466 $ 75,414 $ 372,089 2.41 % 2.51 % 1.99
Summary of Other Derivative Activities	Other derivative activities included the following as of the dates indicated: Notional Asset derivatives Liability derivatives (in thousands) March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 March 31, 2024 December 31, 2023 Mortgage banking derivatives: Total mortgage banking risk management 662,000 662,000 16,454 14,634 35,429 31,304 Customer-related derivatives: Swaps receive fixed 14,931,634 15,017,998 2,903 26,731 793,390 687,505 Swaps pay fixed 14,984,936 15,005,503 812,882 708,642 3,876 26,366 Other 7,942,342 8,691,978 58,425 93,439 56,824 91,602 Total customer-related derivatives 37,858,912 38,715,479 874,210 828,812 854,090 805,473 Other derivative activities: Foreign exchange contracts 10,244,954 11,518,594 50,793 54,722 50,381 62,842 Interest rate swap agreements 100 2,400,100 7 — — 2 Interest rate cap agreements 1,814,427 2,313,672 67,732 76,019 — — Options for interest rate cap agreements 1,814,427 2,313,672 — — 67,732 76,019 Other 54,709,920 48,543,537 51,216 42,657 71,136 126,968 Total $ 107,104,740 $ 106,467,054 $ 1,060,412 $ 1,016,844 $ 1,078,768 $ 1,102,608
Summary of Derivative Activities in the Consolidated Statement of Operations	The following Condensed Consolidated Statements of Operations line items were impacted by the Company’s derivative activities for the periods indicated: (in thousands) Three months ended March 31, Line Item 2024 2023 Fair value hedges: Cross-currency swaps Net interest income $ (190) $ (830) Interest rate swaps Net interest income 12,888 5,400 Derivative Activity (1) Cash flow hedges: Pay fixed-receive variable interest rate swaps Interest expense on borrowings 12,926 (3,468) Pay variable receive-fixed interest rate swap Interest income on loans (95,381) (101,917) Interest rate floors Interest income on loans (46) (436) Other derivative activities: Mortgage banking derivatives Non Interest income (4,210) 2,383 Customer-related derivatives Non interest income 10,377 17,057 Foreign exchange Non interest income (6,306) (10,281) Interest rate swaps, caps, and options Non interest income 24,522 (694) Other Non interest income 25,348 (57,558) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected.
Summary of Offsetting of Financial Assets	The amounts of securities financing assets or liabilities qualified for offset in the Condensed Consolidated Balance Sheets were as follows for the dates indicated. March 31, 2024 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 53,209,700 $ (45,580,894) $ 7,628,806 Securities borrowed 1,837,001 — 1,837,001 Total $ 55,046,701 $ (45,580,894) $ 9,465,807 March 31, 2024 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 61,745,328 $ (45,580,894) $ 16,164,434 Securities lending 17 — 17 Total $ 61,745,345 $ (45,580,894) $ 16,164,451 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. NOTE 11. SECURITIES FINANCING ACTIVITIES (continued) December 31, 2023 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 41,237,731 $ (32,620,422) $ 8,617,309 Securities borrowed 1,621,405 — 1,621,405 Total $ 42,859,136 $ (32,620,422) $ 10,238,714 December 31, 2023 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 48,911,183 $ (32,620,422) $ 16,290,761 Securities lending 25 — 25 Total 48,911,208 (32,620,422) 16,290,786 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. Information about financial assets and liabilities that are eligible for offset on the Condensed Consolidated Balance Sheets was as follows for the dates indicated: Offsetting of Financial Assets Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Assets Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets Collateral Received (2) Net Amount March 31, 2024 Fair value hedges $ 66,931 $ — $ 66,931 $ (32,121) $ 34,810 Cash flow hedges 65,171 — 65,171 (62,168) 3,003 Other derivative activities (1) 1,060,412 (32,183) 1,028,229 (290,159) 738,070 Total Derivative Assets $ 1,192,514 $ (32,183) $ 1,160,331 $ (384,448) $ 775,883 December 31, 2023 Fair value hedges $ 38,904 $ — $ 38,904 $ (11,300) $ 27,604 Cash flow hedges 36,510 — 36,510 (22,935) 13,575 Other derivative activities (1) 1,016,844 (2,064) 1,014,780 (170,835) 843,945 Total Derivative Assets $ 1,092,258 $ (2,064) $ 1,090,194 $ (205,070) $ 885,124 (1) Includes customer-related and other derivatives. (2) Collateral received includes cash, cash equivalents, and other financial instruments. Cash collateral received is reported in Other liabilities, as applicable, in the Condensed Consolidated Balance Sheets. Financial instruments that are pledged to the Company are not reflected in the accompanying Condensed Consolidated Balance Sheets since the Company does not control or have the ability to re-hypothecate these instruments.
Summary of Offsetting Financial Liabilities	The amounts of securities financing assets or liabilities qualified for offset in the Condensed Consolidated Balance Sheets were as follows for the dates indicated. March 31, 2024 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 53,209,700 $ (45,580,894) $ 7,628,806 Securities borrowed 1,837,001 — 1,837,001 Total $ 55,046,701 $ (45,580,894) $ 9,465,807 March 31, 2024 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 61,745,328 $ (45,580,894) $ 16,164,434 Securities lending 17 — 17 Total $ 61,745,345 $ (45,580,894) $ 16,164,451 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. NOTE 11. SECURITIES FINANCING ACTIVITIES (continued) December 31, 2023 (in thousands) Gross amounts of recognized assets Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of assets included on the Condensed Consolidated Balance Sheets Securities purchased under agreements to resell $ 41,237,731 $ (32,620,422) $ 8,617,309 Securities borrowed 1,621,405 — 1,621,405 Total $ 42,859,136 $ (32,620,422) $ 10,238,714 December 31, 2023 (in thousands) Gross amounts of recognized liabilities Gross amounts offset on the Condensed Consolidated Balance Sheets (1) Net amounts of liabilities included on the Condensed Consolidated Balance Sheets Securities sold under agreements to repurchase $ 48,911,183 $ (32,620,422) $ 16,290,761 Securities lending 25 — 25 Total 48,911,208 (32,620,422) 16,290,786 (1) Includes financial instruments subject to enforceable master netting agreements that are permitted to be offset under ASC 210-20-45. Offsetting of Financial Liabilities Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets (in thousands) Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Condensed Consolidated Balance Sheets Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets Collateral Pledged (2) Net Amount March 31, 2024 Fair value hedges $ 2,475 $ — $ 2,475 $ (1,171) $ 1,304 Cash flow hedges 333,749 — 333,749 (139,635) 194,114 Other derivative activities (1) 1,078,768 (32,133) 1,046,635 (94,057) 952,578 Total Derivative Liabilities $ 1,414,992 $ (32,133) $ 1,382,859 $ (234,863) $ 1,147,996 December 31, 2023 Fair value hedges $ 9,951 $ — $ 9,951 (1,064) $ 8,887 Cash flow hedges 362,138 — 362,138 $ (140,968) 221,170 Other derivative activities (1) 1,102,608 (2,014) 1,100,594 (129,722) 970,872 Total Derivative Liabilities $ 1,474,697 $ (2,014) $ 1,472,683 $ (271,754) $ 1,200,929 (1) Includes customer-related and other derivatives. (2) Cash collateral pledged and financial instruments pledged is reported in Other assets in the Condensed Consolidated Balance Sheets. In certain instances, the Company is over-collateralized since the actual amount of collateral pledged exceeds the associated financial liability. As a result, the actual amount of collateral pledged that is reported in Other assets may be greater than the amount shown in the table above.

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 31, 2024
Fair Value Disclosures [Abstract]
Summary of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables present the assets and liabilities that are measured at fair value on a recurring basis by major product category and fair value hierarchy as of the dates indicated: (in thousands) Level 1 Level 2 Level 3 Balance at March 31, 2024 Level 1 Level 2 Level 3 Balance at December 31, 2023 Financial assets: U.S. Treasury securities $ 226,359 $ — $ — $ 226,359 $ 25,409 $ — $ — $ 25,409 Corporate debt — 2,130 — 2,130 — 31,590 — 31,590 ABS — 549,739 — 549,739 — 510,663 — 510,663 Beneficial interest in Structured LLC — — 1,082,349 1,082,349 — 1,122,510 — 1,122,510 MBS — 5,230,937 — 5,230,937 — 5,349,365 — 5,349,365 Investment in debt securities AFS (2) $ 226,359 $ 5,782,806 $ 1,082,349 $ 7,091,514 $ 25,409 $ 7,014,128 $ — $ 7,039,537 Trading securities 1,593,249 7,404,215 6,148 9,003,612 1,637,908 6,329,031 936 7,967,875 Federal funds sold and securities purchased under resale agreements or similar arrangements — 604,292 — 604,292 — 2,112,292 — 2,112,292 RICs HFI (3) — — 12,494 12,494 — — 13,888 13,888 LHFS (1)(4) — 535,373 — 535,373 — 19,464 — 19,464 MSRs — — 95,776 95,776 — — 94,266 94,266 Other assets - derivatives (2) 586 1,159,713 32 1,160,331 4,807 1,085,333 54 1,090,194 Total financial assets (5) $ 1,820,194 $ 15,486,399 $ 1,196,799 $ 18,503,392 $ 1,668,124 $ 16,560,248 $ 109,144 $ 18,337,516 Financial liabilities: Federal funds purchased and securities loaned or sold under repurchase agreements $ — $ 362,103 $ — $ 362,103 $ — $ 595,414 $ — $ 595,414 Trading liabilities 2,665,439 295,178 — 2,960,617 2,371,823 327,293 384 2,699,500 Other liabilities - derivatives (2) 134 1,382,360 365 1,382,859 5,914 1,466,119 650 1,472,683 Total financial liabilities $ 2,665,573 $ 2,039,641 $ 365 $ 4,705,579 $ 2,377,737 $ 2,388,826 $ 1,034 $ 4,767,597 (1) LHFS disclosed on the Condensed Consolidated Balance Sheets also includes LHFS that are held at the lower of cost or fair value and are not presented within this table. (2) Refer to Note 2 for the fair value of investment securities and to Note 12 for the fair values of derivative assets and liabilities on a further disaggregated basis. (3) RICs collateralized by vehicle titles at SC and RV/marine loans at SBNA. (4) Residential mortgage loans and commercial mortgage loans. (5) Approximately $1.2 billion of these financial assets were measured using model-based techniques, or Level 3 inputs, and represented approximately 6.5% of total assets measured at fair value on a recurring basis and approximately 0.7% of total consolidated assets.
Summary of Rollforward for Recurring Assets and Liabilities	The tables below present the changes in Level 3 balances for those assets and liabilities measured at fair value on a recurring basis for the periods indicated. Three months ended March 31, 2024 Three months ended March 31, 2023 (in thousands) Beneficial interest in Structured, LLC RICs HFI MSRs Derivatives, net Other Total RICs HFI MSRs Derivatives, net Other Total Balances, beginning of period $ — $ 13,888 $ 94,266 $ (596) $ 552 $ 108,110 $ 20,924 $ 107,383 $ (2,210) $ 139 $ 126,236 Gain / (losses) in OCI (23,469) — — — — (23,469) — — — — — Gains/(losses) in earnings — — 3,848 263 (9) 4,102 — (2,539) (169) (2) (2,710) Additions/Issuances — — — — 465 465 — — — — — Transfer from Level 2 1,122,510 — — — 5,576 1,128,086 — — — 2,219 2,219 Settlements (1) (16,692) (1,394) (2,338) — (436) (20,860) (2,100) (2,534) — — (4,634) Balances, end of period $ 1,082,349 $ 12,494 $ 95,776 $ (333) $ 6,148 $ 1,196,434 $ 18,824 $ 102,310 $ (2,379) $ 2,356 $ 121,111 Changes in unrealized gains (losses) included in earnings related to balances still held at end of period $ — $ — $ 3,848 $ 263 $ (9) $ 4,102 $ — $ (2,539) $ (169) $ (2) $ (2,710) (1) Settlements include charge-offs, prepayments, paydowns and maturities.
Summary of Fair Value Measurements, Nonrecurring	Assets measured at fair value on a nonrecurring basis that were still held on the balance sheet were as follows at the dates indicated: (in thousands) Level 1 Level 2 Level 3 Balance at March 31, 2024 Level 1 Level 2 Level 3 Balance at December 31, 2023 Impaired commercial LHFI $ — $ 137,370 $ 96,774 $ 234,144 $ — $ 230,443 $ 41,432 $ 271,875 Foreclosed assets — 20,922 — 20,922 — 24,588 — 24,588 Vehicle inventory — 356,793 — 356,793 — 311,321 — 311,321 LHFS — — 60,978 60,978 — — 140,655 140,655 Auto loans impaired due to bankruptcy — 139,709 — 139,709 — 154,684 — 154,684
Summary of Increases and Decreases in Value of Certain Assets Measured at Fair Value on Nonrecurring Basis	The following table presents the increases and decreases in value of certain assets that are measured at fair value on a nonrecurring basis for which a fair value adjustment has been included in the Condensed Consolidated Statements of Operations relating to assets held at period-end: Three months ended March 31, (in thousands) Statement of Operations Location 2024 2023 Impaired LHFI Credit loss expense / (benefit) $ (3,505) $ (3,250) Foreclosed assets Miscellaneous income, net (1) (3,964) (8) LHFS Miscellaneous income, net (1) — (3,769) Auto loans impaired due to bankruptcy Credit loss expense / (benefit) 11,957 (3,371) (1) Gains are disclosed as positive numbers while losses are shown as a negative number regardless of the line item being affected.
Summary of Quantitative Information on Level 3 Recurring Assets and Liabilities	The following table presents quantitative information about the significant unobservable inputs within significant Level 3 recurring and nonrecurring assets and liabilities at the dates indicated: (dollars in thousands) Fair Value at March 31, 2024 (3) Valuation Technique Unobservable Inputs Range Financial Assets: Beneficial interest in Structured LLC $ 1,082,349 DCF Discount rate (1) 11.50% Loss severity rate 0.00% -100.00% Extension of Loan 0 to 60 months MSRs $ 95,776 DCF CPR (2) 0.00% - 100.00% (7.48%) Discount rate (1) 9.81 % (1) Average discount rate from collateral stratified by loan type and note rate. Weighted average amount was developed by weighting the associated relative UPB. (2) Average CPR projected from collateral stratified by loan type and note rate. Weighted average amount was developed by weighting the associated relative UPB. (3) Excluded insignificant Level 3 assets and liabilities. NOTE 13. FAIR VALUE (continued) (dollars in thousands) Fair Value at December 31, 2023 (3) Valuation Technique Unobservable Inputs Range MSRs $ 94,266 DCF CPR (2) 0.00% - 100.00% (7.53%) Discount rate (3) 9.81 %
Summary of Fair Value of Financial Instruments	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments are as follows as of the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Carrying Value Fair Value Level 1 Level 2 Level 3 Carrying Value Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and cash equivalents $ 14,413,097 $ 14,413,097 $ 14,413,097 $ — $ — $ 13,118,428 $ 13,118,428 $ 13,118,428 $ — $ — Federal funds sold and securities purchased under resale agreements or similar arrangements 9,465,807 9,463,021 — 9,463,021 — 10,238,714 10,234,487 — 10,234,487 — Investments in debt securities AFS 7,091,513 7,091,514 226,359 5,782,806 1,082,349 7,039,537 7,039,537 25,409 7,014,128 — Investments in debt securities HTM 8,969,064 7,410,927 — 7,410,927 — 9,039,704 7,562,523 — 7,562,523 — Trading securities and other investments (2) 9,003,612 9,003,612 1,593,249 7,404,215 6,148 7,967,875 7,967,874 1,637,908 6,329,030 936 LHFI, net 84,937,664 86,999,045 — 137,370 86,861,675 86,115,156 89,544,115 — 230,443 89,313,672 LHFS 596,351 596,351 — 535,373 60,978 160,118 160,119 — 19,464 140,655 Restricted cash 5,365,963 5,365,963 5,365,963 — — 5,549,701 5,549,701 5,549,701 — — MSRs 95,776 95,776 — — 95,776 94,266 94,266 — — 94,266 Derivatives 1,160,331 1,160,331 586 1,159,713 32 1,090,194 1,090,194 4,807 1,085,333 54 Financial liabilities: Deposits (1) 20,763,160 20,834,335 — 20,834,335 — 19,947,868 20,040,000 — 20,040,000 — Federal funds purchased and securities loaned or sold under repurchase agreements 16,164,451 16,168,676 — 16,168,676 — 16,290,786 16,289,980 — 16,289,980 — Trading liabilities 2,960,617 2,960,617 2,665,439 295,178 — 2,699,500 2,699,500 2,371,823 327,293 384 Borrowings and other debt obligations 43,911,347 43,952,206 — 37,642,851 6,309,355 44,144,051 44,107,856 — 36,998,432 7,109,424 Derivatives 1,382,859 1,382,859 134 1,382,360 365 1,472,683 1,472,683 5,914 1,466,119 650 (1) This line item excludes deposit liabilities with no defined or contractual maturities in accordance with ASU 2016-01. ( 2) This line item includes CDs with a maturity greater than 90 days and investments in trading securities.
Summary of Difference Between Fair Value and Principal Balance of LHFS	The following table summarizes the differences between the fair value and the principal balance of financial instruments measured at fair value on a recurring basis as of the dates indicated: March 31, 2024 December 31, 2023 (in thousands) Fair Value Principal Balance Difference Fair Value Principal Balance Difference LHFS (1) $ 535,373 $ 533,682 $ 1,691 $ 19,464 $ 19,389 $ 75 RICs HFI $ 12,494 $ 12,494 $ — $ 13,888 $ 13,888 $ — Nonaccrual loans 95 95 — 74 74 — Securities Financing Activities Federal funds sold and securities purchased under resale agreements or similar arrangements 604,292 603,837 455 $ 2,112,292 $ 2,111,293 $ 999 Federal funds purchased and securities loaned or sold under repurchase agreements 362,103 362,020 83 595,414 595,142 272 (1) LHFS disclosed on the Condensed Consolidated Balance Sheets also includes $61.0 million and $140.7 million of LHFS at March 31, 2024 and December 31, 2023, respectively, that are held at the lower of cost or fair value that are not presented within this table. There were no nonaccrual loans related to the LHFS measured using the FVO.

NON-INTEREST INCOME AND OTHER_2

NON-INTEREST INCOME AND OTHER EXPENSES (Tables)	3 Months Ended
	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Summary of Details of Non-Interest Income	The following table presents the details of the Company's non-interest income for the following periods: Three months ended March 31, (in thousands) 2024 2023 Non-interest income: Consumer and commercial fees $ 84,217 $ 90,329 Lease income 593,447 628,424 Capital market revenue 115,970 37,082 Miscellaneous income, net Mortgage banking income, net 13,750 4,184 BOLI 18,194 15,570 Net gain on sale of operating leases 22,759 22,383 Asset and wealth management fees 80,603 61,133 (Loss) / gain on non-mortgage loans (740) (4,701) Other miscellaneous income, net (55,635) 8,903 Net gain / (loss) on sale of investment securities 65,166 36,960 Total Non-interest income $ 937,731 $ 900,267
Summary of Disaggregation of Revenue from Contracts with Customers	The following table presents the Company's non-interest income disaggregated by revenue source: Three months ended March 31, (in thousands) 2024 2023 Non-interest income: In-scope of revenue from contracts with customers: Depository services (1) $ 31,048 $ 31,695 Commission and trailer fees (2) 77,063 57,626 Interchange income, net (2) 19,116 17,525 Underwriting service fees (2) 73,492 27,961 Asset and wealth management fees (2) 47,821 30,105 Other revenue from contracts with customers (2) 2,122 11,948 Total in-scope of revenue from contracts with customers 250,662 176,860 Out-of-scope of revenue from contracts with customers: Consumer and commercial fees (3) 34,952 41,626 Lease income 593,447 628,424 Other miscellaneous income, net (3) (6,496) 16,397 Net gain / (loss) on sale of investment securities 65,166 36,960 Total out-of-scope of revenue from contracts with customers 687,069 723,407 Total non-interest income $ 937,731 $ 900,267 (1) Primarily recorded in the Company's Consolidated Statements of Operations within Consumer and commercial fees. (2) Primarily recorded in the Company's Consolidated Statements of Operations within Miscellaneous income, net. (3) The balance presented excludes certain revenue streams that are considered in-scope and presented above.
Summary of Other Expense	The following table presents the Company's other expenses for the following periods: Three months ended March 31, (in thousands) 2024 2023 Other expenses: Amortization of intangibles $ 9,581 $ 10,446 Deposit insurance premiums and other expenses 16,604 18,757 Other administrative expenses 94,975 86,578 Other miscellaneous expenses 17,385 5,198 Total Other expenses $ 138,545 $ 120,979

COMMITMENTS, CONTINGENCIES, A_2

COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Tables)	3 Months Ended
	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Summary of Commitments Amount	The following table details the amount of commitments at the dates indicated: Other Commitments March 31, 2024 December 31, 2023 (in thousands) Commitments to extend credit $ 24,846,809 $ 25,239,691 Letters of credit 1,084,701 1,168,681 Recourse exposure on sold loans 18,157 18,546 Total commitments $ 25,949,667 $ 26,426,918
Summary of Liabilities for Commitments and Contingencies	The following table summarizes significant liabilities recorded for commitments and contingencies associated with the Company's RIC origination and servicing operations, all of which are included in Accounts payable and accrued expenses in the accompanying Condensed Consolidated Balance Sheets at the dates indicated: Agreement or Legal Matter Commitment or Contingency March 31, 2024 December 31, 2023 (in thousands) MPLFA Revenue-sharing and gain/(loss), net-sharing payments $ 11,129 $ 10,302

BUSINESS SEGMENT INFORMATION (T

BUSINESS SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2024
Segment Reporting [Abstract]
Summary of Segment Reporting Information	The following tables present certain information regarding the Company’s segments: Three months ended SHUSA Reportable Segments Consumer Activities Commercial Activities March 31, 2024 Auto CBB C&I CRE CIB Wealth Management Other (1) Total (in thousands) Net interest income / (expense) $ 885,622 $ 377,814 $ 86,401 $ 124,191 $ 26,911 $ 60,684 $ (184,114) $ 1,377,509 Non-interest income 571,158 61,348 14,070 8,953 164,850 83,732 33,620 937,731 Credit loss expense / (benefit) 379,652 52,034 (21,395) 8,737 (12,743) — (1,287) 404,998 Total expenses 807,303 353,005 52,986 32,366 195,479 66,870 51,272 1,559,281 Income/(loss) before income taxes 269,825 34,123 68,880 92,041 9,025 77,546 (200,479) 350,961 Total assets 61,259,798 11,747,388 4,080,901 23,845,435 26,842,241 7,322,916 30,667,061 165,765,740 (1) Other includes the results of the immaterial entities, earnings from non-strategic assets, the investment portfolio, interest expense on SBNA’s and the Company's borrowings and other debt obligations, amortization of intangible assets and certain unallocated corporate income and indirect expenses. Three months ended SHUSA Reportable Segments Consumer Activities Commercial Activities March 31, 2023 Auto CBB C&I CRE CIB Wealth Management Other (1) Total (in thousands) Net interest income / (expense) $ 920,272 $ 400,246 $ 82,942 $ 105,132 $ 59,789 $ 70,019 $ (128,006) $ 1,510,394 Non-interest income 650,683 65,974 10,929 4,997 89,735 57,655 20,294 900,267 Credit loss expense / (benefit) 417,766 109,095 2,094 30,383 (11,122) — (5,815) 542,401 Total expenses 824,726 368,348 59,023 31,781 120,139 68,522 70,635 1,543,174 Income/(loss) before income taxes 328,463 (11,223) 32,754 47,965 40,507 59,152 (172,532) 325,086 Total assets 62,163,190 13,174,180 6,021,239 21,921,029 36,282,779 8,267,535 29,727,891 177,557,843 (1) Refer to corresponding notes above.

DESCRIPTION OF BUSINESS, BASI_3

DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	Mar. 31, 2024		Dec. 31, 2023		Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Noncontrolling Interest [Line Items]
Financing receivable, allowance for credit loss	$ 6,742,124	[1]	$ 6,932,053	[1]	$ 6,915,292		$ 6,779,999
Decrease in retained earnings	$ 419,329		$ 718,134
Cumulative Effect, Period of Adoption, Adjustment
Noncontrolling Interest [Line Items]
Financing receivable, allowance for credit loss						$ 55,200	$ 55,240
Decrease in retained earnings						41,400
Decrease in deferred tax liabilities, net						$ 13,800
FDIC | Structured LLC
Noncontrolling Interest [Line Items]
Equity ownership, excluding consolidated entity and equity method investee, percentage	20%		20%
Joint venture, acquired amount	$ 1,100,000		$ 1,100,000
Joint venture portfolio amount			$ 9,000,000
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

INVESTMENT SECURITIES - AFS Deb

INVESTMENT SECURITIES - AFS Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 7,957,514	$ 7,925,890
Gross Unrealized Gains	319	61
Gross Unrealized Loss	(866,320)	(886,414)
Fair Value	$ 7,091,513	$ 7,039,537
FDIC | Structured LLC
Debt Securities, Available-for-sale [Line Items]
Equity ownership, excluding consolidated entity and equity method investee, percentage	20%	20%
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 226,294	$ 25,391
Gross Unrealized Gains	80	18
Gross Unrealized Loss	(15)	0
Fair Value	226,359	25,409
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,128	31,584
Gross Unrealized Gains	2	7
Gross Unrealized Loss	0	(1)
Fair Value	2,130	31,590
ABS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	550,506	512,553
Gross Unrealized Gains	232	29
Gross Unrealized Loss	(999)	(1,919)
Fair Value	549,739	510,663
Beneficial interest in Structured LLC
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,105,817	1,122,510
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(23,469)	0
Fair Value	1,082,348	1,122,510
GNMA - Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,123,600	3,187,600
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(383,366)	(394,756)
Fair Value	2,740,234	2,792,844
GNMA - Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	655,566	659,882
Gross Unrealized Gains	4	4
Gross Unrealized Loss	(144,425)	(141,672)
Fair Value	511,145	518,214
FHLMC and FNMA - Residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,283,311	2,330,558
Gross Unrealized Gains	1	3
Gross Unrealized Loss	(392,303)	(381,142)
Fair Value	1,891,009	1,949,419
FHLMC and FNMA - Commercial
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	91,689	91,821
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(3,140)	(2,933)
Fair Value	88,549	88,888
Unallocated fair value hedge basis adjustment
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	(81,397)	(36,009)
Gross Unrealized Gains	0	0
Gross Unrealized Loss	81,397	36,009
Fair Value	$ 0	$ 0

INVESTMENT SECURITIES - HTM Deb

INVESTMENT SECURITIES - HTM Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 8,969,064	$ 9,039,704
Gross Unrealized Gains	177	1,216
Gross Unrealized Loss	(1,558,314)	(1,478,397)
Fair Value	7,410,927	7,562,523
ABS
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	82,024	29,701
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(283)	(363)
Fair Value	81,741	29,338
GNMA - Residential
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	2,705,439	2,752,158
Gross Unrealized Gains	177	724
Gross Unrealized Loss	(501,124)	(469,929)
Fair Value	2,204,492	2,282,953
GNMA - Commercial
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	4,793,728	4,843,478
Gross Unrealized Gains	0	492
Gross Unrealized Loss	(924,608)	(894,635)
Fair Value	3,869,120	3,949,335
FHLMC and FNMA - Residential
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,387,873	1,414,367
Gross Unrealized Gains	0	0
Gross Unrealized Loss	(132,299)	(113,470)
Fair Value	$ 1,255,574	$ 1,300,897

INVESTMENT SECURITIES - Narrati

INVESTMENT SECURITIES - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 9,200,000,000	$ 11,200,000,000
Accrued interest on investment securities	109,500,000	79,600,000
Debt securities, available-for-sale, accrued interest writeoff	0	0
Debt securities, held-to-maturity, accrued interest, writeoff	0	0
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest	0	0
Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest	0	0
Collateral with Federal Reserve Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	4,400,000,000	7,500,000,000
Public fund deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	3,200,000,000	3,200,000,000
Repurchase agreements, hedging activities and recourse on loan sales
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	59,600,000	95,600,000
Overnight customer deposits
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	343,700,000	349,900,000
Collateral with FFederal Home Loan Bank
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	1,200,000,000	0
Repurchase agreements
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities pledged as collateral, fair value	$ 0	$ 0

INVESTMENT SECURITIES - Contrac

INVESTMENT SECURITIES - Contractual Maturity of AFS Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due within one year	$ 29,941
Due after 1 year but within 5 years	332,404
Due after 5 years but within 10 years	264,315
Due after 10 years	7,412,251
Total	8,038,911
Fair Value
Due within one year	29,899
Due after 1 year but within 5 years	327,589
Due after 5 years but within 10 years	256,947
Due after 10 years	6,477,078
Total	$ 7,091,513	$ 7,039,537

INVESTMENT SECURITIES - Contr_2

INVESTMENT SECURITIES - Contractual Maturity of HTM Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Due within one year	$ 0
Due after 1 year but within 5 years	28,974
Due after 5 years but within 10 years	57,618
Due after 10 years	8,882,472
Total	8,969,064
Fair Value
Due within one year	0
Due after 1 year but within 5 years	28,690
Due after 5 years but within 10 years	57,369
Due after 10 years	7,324,868
Total	$ 7,410,927	$ 7,562,523

INVESTMENT SECURITIES - Gross U

INVESTMENT SECURITIES - Gross Unrealized Loss and Fair Value of AFS Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less than 12 months	$ 1,137,712	$ 21,066
12 months or longer	5,361,698	5,751,599
Unrealized Losses
Less than 12 months	(23,563)	(169)
12 months or longer	(924,154)	(922,254)
U.S. Treasury securities
Fair Value
Less than 12 months	6,954	6,992
12 months or longer	0	0
Unrealized Losses
Less than 12 months	(15)	0
12 months or longer	0	0
Corporate debt securities
Fair Value
Less than 12 months	72	7,325
12 months or longer	13	13
Unrealized Losses
Less than 12 months	0	(1)
12 months or longer	0	0
ABS
Fair Value
Less than 12 months	84,402	6,749
12 months or longer	131,838	402,325
Unrealized Losses
Less than 12 months	(79)	(168)
12 months or longer	(920)	(1,751)
Beneficial interest in Structured LLC
Fair Value
Less than 12 months	1,046,284	0
12 months or longer	0	0
Unrealized Losses
Less than 12 months	(23,469)	0
12 months or longer	0	0
GNMA - Residential
Fair Value
Less than 12 months	0	0
12 months or longer	2,739,232	2,792,843
Unrealized Losses
Less than 12 months	0	0
12 months or longer	(383,366)	(394,756)
GNMA - Commercial
Fair Value
Less than 12 months	0	0
12 months or longer	511,142	518,210
Unrealized Losses
Less than 12 months	0	0
12 months or longer	(144,425)	(141,672)
FHLMC and FNMA - Residential
Fair Value
Less than 12 months	0	0
12 months or longer	1,890,924	1,949,320
Unrealized Losses
Less than 12 months	0	0
12 months or longer	(392,303)	(381,142)
FHLMC and FNMA - Commercial
Fair Value
Less than 12 months	0	0
12 months or longer	88,549	88,888
Unrealized Losses
Less than 12 months	0	0
12 months or longer	$ (3,140)	$ (2,933)

INVESTMENT SECURITIES - Gross_2

INVESTMENT SECURITIES - Gross Unrealized Loss and Fair Value of HTM Debt Securities (Details) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less than 12 months	$ 195,860	$ 126,399
12 months or longer	7,115,784	7,272,387
Unrealized Losses
Less than 12 months	(2,386)	(2,451)
12 months or longer	(1,555,928)	(1,475,946)
ABS and other interests in structured securities
Fair Value
Less than 12 months	3,537	22,461
12 months or longer	25,155	6,878
Unrealized Losses
Less than 12 months	0	(313)
12 months or longer	(283)	(50)
GNMA - Residential
Fair Value
Less than 12 months	66,910	0
12 months or longer	2,091,347	2,166,032
Unrealized Losses
Less than 12 months	(429)	0
12 months or longer	(500,695)	(469,929)
GNMA - Commercial
Fair Value
Less than 12 months	69,063	45,983
12 months or longer	3,800,058	3,856,536
Unrealized Losses
Less than 12 months	(1,130)	(1,610)
12 months or longer	(923,478)	(893,025)
FHLMC and FNMA - Residential
Fair Value
Less than 12 months	56,350	57,955
12 months or longer	1,199,224	1,242,941
Unrealized Losses
Less than 12 months	(827)	(528)
12 months or longer	$ (131,472)	$ (112,942)

INVESTMENT SECURITIES - Gains (

INVESTMENT SECURITIES - Gains (Losses) on Sale of Investment Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 0	$ 192
Gross realized losses	0	(4,690)
Net realized gains/(losses) on AFS and other securities	0	(4,498)
Total trading securities gains/(losses)	65,166	41,458
Total realized gains/(losses) in income from investments	$ 65,166	$ 36,960

INVESTMENT SECURITIES - Other-T

INVESTMENT SECURITIES - Other-Than-Temporary Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Trading securities	$ 9,003,612	$ 7,967,875
Trading securities, FV-NI, cost	$ 8,200,000	$ 7,400,000

INVESTMENT SECURITIES - Schedul

INVESTMENT SECURITIES - Schedule of Other Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
FHLB of Pittsburgh and FRB stock	$ 571,981	$ 631,394
LIHTC investments	721,298	660,694
Equity securities not held for trading	52,741	61,190
Total	1,346,020	1,353,278
Off-balance Securitization Trusts
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Equity securities not held for trading	$ 4,300	$ 2,800

INVESTMENT SECURITIES - Other I

INVESTMENT SECURITIES - Other Investments Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares
Investments, Debt and Equity Securities [Abstract]
FHLB Stock, par value (in usd per share) | $ / shares	$ 100
Purchases of FHLB stock	$ 39,900,000
FHLB stock redeemed	105,600,000
Purchase of FRB stock	6,400,000
Proceeds from FRB stock	0
Gain (loss) on redemption of FHLB stock	$ 0

LOANS AND ALLOWANCE FOR CREDI_3

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)		3 Months Ended		12 Months Ended
		Mar. 31, 2024 USD ($) payment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Loans Receivable [Line Items]
LHFI, net		$ 84,937,664,000		$ 86,115,156,000
LHFS	[1]	$ 596,351,000		$ 160,118,000
Financing receivable, accrued interest after allowance for credit loss statement of financial position extensible list not disclosed flag		accrued interest receivable		accrued interest receivable
Accrued interest receivable		$ 624,800,000		$ 661,000,000
Credit risk assumptions, historical period		3 years
Loans receivable, unemployment rate		4.90%		5%
Loans receivable, basis spread on variable rate		198		201
Financing receivable, allowance for credit losses, excluding accrued interest and off-balance sheet, credit loss, liability		$ 6,799,350,000	$ 7,001,026,000
Financing receivable, excluding accrued interest, allowance for credit loss, period decrease		$ 193,500,000
Percentage of payment needed on past due loans for qualification		90%
Charge-offs		$ 1,268,437,000	1,145,966,000
TDRs, number of days past due after modification considered to have subsequently defaulted		90 days
Retail installment contracts
Loans Receivable [Line Items]
TDRs, number of days past due after modification considered to have subsequently defaulted		120 days
Consumer
Loans Receivable [Line Items]
Financing receivable, allowance for credit losses, excluding accrued interest and off-balance sheet, credit loss, liability		$ 6,156,536,000	6,342,056,000
Financing receivable, excluding accrued interest, allowance for credit loss, period decrease		163,600,000
Charge-offs		1,244,661,000	1,119,100,000
Consumer | Other Consumer Portfolio
Loans Receivable [Line Items]
Charge-offs		800,000
Consumer | RICs and auto loans
Loans Receivable [Line Items]
Charge-offs		$ 1,131,543,000		$ 4,282,738,000
Number of deferred payments allowed | payment		3
Number of deferred payments per period | payment		1
Number of payments required to be eligible for deferred payment | payment		8
Consumer | RICs and auto loans | Extended Maturity For Non-Natural Disasters
Loans Receivable [Line Items]
Term increase from modification (up to)		8 months
Consumer | RICs and auto loans | Extended Maturity For Natural Disasters
Loans Receivable [Line Items]
Term increase from modification (up to)		12 months
Consumer | Marine and RV contracts | Extended Maturity
Loans Receivable [Line Items]
Term increase from modification (up to)		12 months
Commercial
Loans Receivable [Line Items]
Financing receivable, allowance for credit losses, excluding accrued interest and off-balance sheet, credit loss, liability		$ 642,814,000	658,970,000
Financing receivable, excluding accrued interest, allowance for credit loss, period decrease		29,800,000
Charge-offs		23,776,000	26,866,000	158,157,000
VIE, Not Primary Beneficiary
Loans Receivable [Line Items]
Receivables securitized		1,060,931,000	$ 0
Asset Pledged as Collateral
Loans Receivable [Line Items]
LHFI, net		$ 59,200,000,000		$ 60,300,000,000
[1]Includes $535.4 million and $19.5 million of loans recorded at the FVO at March 31, 2024 and December 31, 2023, respectively.

LOANS AND ALLOWANCE FOR CREDI_4

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Loan and Lease Portfolio Composition (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Loans Receivable [Line Items]
Total	[1],[2]	$ 91,679,788	$ 93,047,209
Loans held for investment with fixed rate of interest		63,946,587	65,960,370
Loans held for investment with variable rate of interest		$ 27,733,201	$ 27,086,839
Loans held for investment, percent of total loans		100%	100%
Loans held for investment with fixed rate of interest, percent of total loans		69.70%	70.90%
Loans held for investment with variable rate of interest, percent of total loans		30.30%	29.10%
Net adjustment in loan balances		$ 497,200	$ 475,000
Commercial
Loans Receivable [Line Items]
Total		$ 37,615,337	$ 37,954,524
Loans held for investment, percent of total loans		41.10%	40.70%
Commercial | CRE loans
Loans Receivable [Line Items]
Total		$ 9,073,614	$ 8,747,544
Loans held for investment, percent of total loans		9.90%	9.40%
Commercial | C&I loans
Loans Receivable [Line Items]
Total		$ 10,825,263	$ 11,181,962
Loans held for investment, percent of total loans		11.80%	12%
Commercial | Multifamily loans
Loans Receivable [Line Items]
Total		$ 10,232,335	$ 10,548,905
Loans held for investment, percent of total loans		11.20%	11.30%
Commercial | Other commercial
Loans Receivable [Line Items]
Total		$ 7,484,125	$ 7,476,113
Loans held for investment, percent of total loans		8.20%	8%
Consumer
Loans Receivable [Line Items]
Total		$ 54,064,451	$ 55,092,685
Loans held for investment, percent of total loans		58.90%	59.30%
Consumer | Residential mortgages
Loans Receivable [Line Items]
Total		$ 4,726,561	$ 4,816,218
Consumer | Home equity loans and lines of credit
Loans Receivable [Line Items]
Total		2,335,081	2,448,454
Consumer loans secured by real estate
Loans Receivable [Line Items]
Total		$ 7,061,642	$ 7,264,672
Loans held for investment, percent of total loans		7.70%	7.80%
Consumer loans secured by real estate | Residential mortgages
Loans Receivable [Line Items]
Total		$ 4,726,561	$ 4,816,218
Loans held for investment, percent of total loans		5.20%	5.20%
Consumer loans secured by real estate | Home equity loans and lines of credit
Loans Receivable [Line Items]
Total		$ 2,335,081	$ 2,448,454
Loans held for investment, percent of total loans		2.50%	2.60%
Consumer loans not secured by real estate | RICs and auto loans
Loans Receivable [Line Items]
Total		$ 43,238,767	$ 43,705,359
Loans held for investment, percent of total loans		47.10%	47%
Consumer loans not secured by real estate | Personal unsecured loans
Loans Receivable [Line Items]
Total		$ 3,711,491	$ 4,062,700
Loans held for investment, percent of total loans		4%	4.40%
Consumer loans not secured by real estate | Other consumer
Loans Receivable [Line Items]
Total		$ 52,551	$ 59,954
Loans held for investment, percent of total loans		0.10%	0.10%
[1]Includes $12.5 million and $13.9 million of loans recorded at fair value at March 31, 2024 and December 31, 2023, respectively.[2]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI_5

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Rollforward of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2024		Mar. 31, 2023	Dec. 31, 2023
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	$ 6,932,053	[1]	$ 6,779,999	$ 6,779,999
Credit loss benefit on loans	408,534		542,249
Charge-offs	(1,268,437)		(1,145,966)
Recoveries	669,974		683,770
Charge-offs, net of recoveries	(598,463)		(462,196)
ALLL, end of period	6,742,124	[1]	6,915,292	6,932,053	[1]
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	60,762		85,582	85,582
Credit loss benefit on unfunded lending commitments	(3,536)		152
Reserve for unfunded lending commitments, end of period	57,226		85,734	60,762
Total ACL, end of period	6,799,350		7,001,026
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period			55,240	55,240
Commercial
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	616,788		562,216	562,216
Credit loss benefit on loans	(15,855)		21,478
Charge-offs	(23,776)		(26,866)	(158,157)
Recoveries	12,790		19,281
Charge-offs, net of recoveries	(10,986)		(7,585)
ALLL, end of period	589,947		581,095	616,788
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	55,846		77,709	77,709
Credit loss benefit on unfunded lending commitments	(2,979)		166
Reserve for unfunded lending commitments, end of period	52,867		77,875	55,846
Total ACL, end of period	642,814		658,970
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period			4,986	4,986
Consumer
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period	6,315,265		6,217,783	6,217,783
Credit loss benefit on loans	424,389		520,771
Charge-offs	(1,244,661)		(1,119,100)
Recoveries	657,184		664,489
Charge-offs, net of recoveries	(587,477)		(454,611)
ALLL, end of period	6,152,177		6,334,197	6,315,265
Reserve for Unfunded Lending Commitments Roll Forward [Roll Forward]
Reserve for unfunded lending commitments, beginning of period	4,916		7,873	7,873
Credit loss benefit on unfunded lending commitments	(557)		(14)
Reserve for unfunded lending commitments, end of period	4,359		7,859	4,916
Total ACL, end of period	$ 6,156,536		6,342,056
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan Losses [Roll Forward]
ALLL, beginning of period			$ 50,254	$ 50,254
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CREDI_6

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Non-accrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	$ 2,521,218		$ 2,884,449
Non-accrual loans with no related allowance	310,933		261,331
Interest income recognized on nonaccrual loans	61,000	$ 49,100
Nonperforming
Financing Receivable, Past Due [Line Items]
OREO	19,422		24,246
Repossessed vehicles	267,545		265,368
Foreclosed and other repossessed assets	2,030		1,666
Total OREO and other repossessed assets	288,997		291,280
Total non-performing assets	2,810,215		3,175,729
Commercial
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	526,188		513,890
Non-accrual loans with no related allowance	150,132		84,414
Commercial | CRE
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	257,807		267,537
Non-accrual loans with no related allowance	131,601		64,383
Commercial | C&I loans
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	159,037		143,504
Non-accrual loans with no related allowance	847		2,230
Commercial | Multifamily
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	102,024		97,228
Non-accrual loans with no related allowance	17,684		17,801
Commercial | Other commercial
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	7,320		5,621
Non-accrual loans with no related allowance	0		0
Consumer
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	1,995,030		2,370,559
Non-accrual loans with no related allowance	160,801		176,917
Consumer | Residential mortgages
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	51,648		52,718
Non-accrual loans with no related allowance	5,720		5,898
Consumer | Home equity loans and lines of credit
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	79,499		86,332
Non-accrual loans with no related allowance	14,111		15,241
Consumer | RICs and auto loans
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	1,829,983		2,194,509
Non-accrual loans with no related allowance	139,077		153,850
Consumer | Personal unsecured loans
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	20,302		21,267
Non-accrual loans with no related allowance	1,844		1,776
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Non-accrual loans and other non-performing assets as of:	13,598		15,733
Non-accrual loans with no related allowance	$ 49		$ 152

LOANS AND ALLOWANCE FOR CREDI_7

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	$ 92,276,139	$ 93,207,327
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	7,917	7,947
LHFS	535,400	19,500
Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	5,797,281	6,679,381
30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	4,981,910	5,816,928
90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	815,371	862,453
Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	86,478,858	86,527,946
Commercial
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	38,071,990	38,095,179
LHFS	456,700	140,700
Commercial | CRE
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	9,469,289	8,747,544
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
LHFS	395,700	0
Commercial | CRE | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	187,860	161,444
Commercial | CRE | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	51,411	98,799
Commercial | CRE | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	136,449	62,645
Commercial | CRE | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	9,281,429	8,586,100
Commercial | C&I
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	10,876,976	11,313,353
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
LHFS	51,700	131,400
Commercial | C&I | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	65,661	66,627
Commercial | C&I | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	53,974	54,367
Commercial | C&I | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	11,687	12,260
Commercial | C&I | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	10,811,315	11,246,726
Commercial | Multifamily
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	10,241,599	10,558,169
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Multifamily | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	107,404	62,391
Commercial | Multifamily | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	44,139	0
Commercial | Multifamily | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	63,265	62,391
Commercial | Multifamily | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	10,134,195	10,495,778
Commercial | Other commercial
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	7,484,126	7,476,113
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
Commercial | Other commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	31,687	51,335
Commercial | Other commercial | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	28,392	48,075
Commercial | Other commercial | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	3,295	3,260
Commercial | Other commercial | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	7,452,439	7,424,778
Consumer | Multifamily
Financing Receivable, Past Due [Line Items]
LHFS	9,300	9,300
Consumer | Residential mortgages
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	4,866,259	4,835,681
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
LHFS	139,700	19,500
Consumer | Residential mortgages | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	135,813	146,190
Consumer | Residential mortgages | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	89,074	99,171
Consumer | Residential mortgages | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	46,739	47,019
Consumer | Residential mortgages | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	4,730,446	4,689,491
Consumer | Home equity loans and lines of credit
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	2,335,081	2,448,454
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | Home equity loans and lines of credit | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	104,190	108,233
Consumer | Home equity loans and lines of credit | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	38,869	36,297
Consumer | Home equity loans and lines of credit | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	65,321	71,936
Consumer | Home equity loans and lines of credit | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	2,230,891	2,340,221
Consumer | RICs and auto loans
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	43,238,767	43,705,359
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | RICs and auto loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	5,043,250	5,951,835
Consumer | RICs and auto loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	4,596,175	5,393,627
Consumer | RICs and auto loans | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	447,075	558,208
Consumer | RICs and auto loans | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	38,195,517	37,753,524
Consumer | Personal unsecured loans
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	3,711,491	4,062,700
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	7,917	7,947
Consumer | Personal unsecured loans | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	119,667	128,768
Consumer | Personal unsecured loans | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	78,384	84,379
Consumer | Personal unsecured loans | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	41,283	44,389
Consumer | Personal unsecured loans | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	3,591,824	3,933,932
Consumer | Other consumer
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	52,551	59,954
Amortized Cost and Recorded Investment Greater than 90 Days and Accruing	0	0
Consumer | Other consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	1,749	2,558
Consumer | Other consumer | 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	1,492	2,213
Consumer | Other consumer | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	257	345
Consumer | Other consumer | Current
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	$ 50,802	$ 57,396

LOANS AND ALLOWANCE FOR CREDI_8

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Lending Asset Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total Financing Receivables	$ 92,276,139		$ 93,207,327
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1,268,437	$ 1,145,966
LHFS	535,400		19,500
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	2,020,933		6,129,065
Year two	5,175,819		10,550,491
Year three	10,475,227		7,039,941
Year four	6,737,928		3,894,575
Year five	3,519,052		4,145,869
Prior	10,143,031		6,335,238
Total Financing Receivables	38,071,990		38,095,179
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	0		3,645
Year two	2,862		20,806
Year three	5,477		50,758
Year four	2,524		5,012
Year five	896		41,180
Prior	12,017		36,756
Total	23,776	26,866	158,157
LHFS	456,700		140,700
Revolving loans converted to term loans	19,500		126,600
Commercial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	1,947,569		5,729,670
Year two	4,787,455		9,476,846
Year three	9,322,594		6,257,940
Year four	5,827,128		3,552,058
Year five	3,187,110		3,338,256
Prior	8,477,474		5,367,656
Total Financing Receivables	33,549,330		33,722,426
Commercial | Special mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	48		126,792
Year two	139,743		381,997
Year three	428,085		255,381
Year four	418,495		105,218
Year five	99,610		416,606
Prior	651,653		327,949
Total Financing Receivables	1,737,634		1,613,943
Commercial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		383
Year two	778		431,977
Year three	491,740		400,171
Year four	382,482		196,070
Year five	198,016		309,313
Prior	936,252		633,839
Total Financing Receivables	2,009,268		1,971,753
Commercial | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		48,778
Prior	48,489		0
Total Financing Receivables	48,489		48,778
Commercial | N/A
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	73,316		272,220
Year two	247,843		259,671
Year three	232,808		126,449
Year four	109,823		41,229
Year five	34,316		32,916
Prior	29,163		5,794
Total Financing Receivables	727,269		738,279
Commercial | CRE
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	426,558		357,097
Year two	418,682		2,238,219
Year three	2,692,611		2,133,413
Year four	2,216,691		1,275,238
Year five	1,191,107		1,053,648
Prior	2,523,640		1,689,929
Total Financing Receivables	9,469,289		8,747,544
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		0
Year three	0		37,982
Year four	1		0
Year five	0		28,626
Prior	662		8,637
Total	663		75,245
LHFS	395,700		0
Commercial | CRE | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	426,558		353,350
Year two	411,544		1,947,060
Year three	2,317,656		1,800,140
Year four	1,777,346		1,108,882
Year five	1,027,695		674,347
Prior	1,868,070		1,343,095
Total Financing Receivables	7,828,869		7,226,874
Commercial | CRE | Special mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		3,747
Year two	7,138		178,287
Year three	245,356		145,212
Year four	259,279		102,550
Year five	99,610		245,385
Prior	333,010		114,666
Total Financing Receivables	944,393		789,847
Commercial | CRE | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		112,872
Year three	129,599		188,061
Year four	180,066		63,806
Year five	63,802		85,138
Prior	274,071		232,168
Total Financing Receivables	647,538		682,045
Commercial | CRE | Doubtful
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		48,778
Prior	48,489		0
Total Financing Receivables	48,489		48,778
Commercial | C&I
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	179,803		1,352,440
Year two	1,317,154		3,301,291
Year three	2,973,111		2,155,268
Year four	1,959,027		1,116,917
Year five	930,512		1,087,878
Prior	3,517,369		2,299,559
Total Financing Receivables	10,876,976		11,313,353
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	0		3,440
Year two	2,582		20,806
Year three	5,464		12,749
Year four	2,502		5,012
Year five	896		11,287
Prior	6,568		19,224
Total	18,012		72,518
LHFS	51,700		131,400
Commercial | C&I | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	106,439		1,073,864
Year two	1,060,293		2,930,616
Year three	2,630,707		1,941,561
Year four	1,763,078		1,002,562
Year five	833,338		993,395
Prior	3,101,853		1,923,607
Total Financing Receivables	9,495,708		9,865,605
Commercial | C&I | Special mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	48		6,256
Year two	8,998		96,218
Year three	50,709		4,695
Year four	12,777		2,668
Year five	0		10,686
Prior	102,473		139,360
Total Financing Receivables	175,005		259,883
Commercial | C&I | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		100
Year two	20		14,786
Year three	58,887		82,563
Year four	73,349		70,458
Year five	62,858		50,881
Prior	283,880		230,798
Total Financing Receivables	478,994		449,586
Commercial | C&I | N/A
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	73,316		272,220
Year two	247,843		259,671
Year three	232,808		126,449
Year four	109,823		41,229
Year five	34,316		32,916
Prior	29,163		5,794
Total Financing Receivables	727,269		738,279
Commercial | Multifamily
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	40,964		1,264,748
Year two	1,253,984		3,410,162
Year three	3,332,229		1,588,386
Year four	1,548,707		1,010,426
Year five	1,013,097		1,755,723
Prior	3,052,618		1,528,724
Total Financing Receivables	10,241,599		10,558,169
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		1,267
Prior	1,102		2,684
Total	1,102		3,951
Commercial | Multifamily | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	40,964		1,147,959
Year two	1,130,377		3,000,968
Year three	2,899,579		1,358,513
Year four	1,278,138		949,385
Year five	942,397		1,422,205
Prior	2,464,286		1,289,127
Total Financing Receivables	8,755,741		9,168,157
Commercial | Multifamily | Special mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		116,789
Year two	123,607		107,137
Year three	131,695		101,850
Year four	143,150		0
Year five	0		160,535
Prior	214,976		72,513
Total Financing Receivables	613,428		558,824
Commercial | Multifamily | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		302,057
Year three	300,955		128,023
Year four	127,419		61,041
Year five	70,700		172,983
Prior	373,356		167,084
Total Financing Receivables	872,430		831,188
Commercial | Remaining commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	1,373,608		3,154,780
Year two	2,185,999		1,600,819
Year three	1,477,276		1,162,874
Year four	1,013,503		491,994
Year five	384,336		248,620
Prior	1,049,404		817,026
Total Financing Receivables	7,484,126		7,476,113
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	0		205
Year two	280		0
Year three	13		27
Year four	21		0
Year five	0		0
Prior	3,685		6,211
Total	3,999		6,443
Commercial | Remaining commercial | Pass
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	1,373,608		3,154,497
Year two	2,185,241		1,598,202
Year three	1,474,652		1,157,726
Year four	1,008,566		491,229
Year five	383,680		248,309
Prior	1,043,265		811,827
Total Financing Receivables	7,469,012		7,461,790
Commercial | Remaining commercial | Special mention
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		0
Year two	0		355
Year three	325		3,624
Year four	3,289		0
Year five	0		0
Prior	1,194		1,410
Total Financing Receivables	4,808		5,389
Commercial | Remaining commercial | Substandard
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	0		283
Year two	758		2,262
Year three	2,299		1,524
Year four	1,648		765
Year five	656		311
Prior	4,945		3,789
Total Financing Receivables	10,306		8,934
Consumer:
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1,244,661	$ 1,119,100
Consumer: | Multifamily
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
LHFS	$ 9,300		$ 9,300

LOANS AND ALLOWANCE FOR CREDI_9

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Consumer Lending Asset Quality Indicators - Credit Score (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total Financing Receivables	$ 92,276,139		$ 93,207,327
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1,268,437	$ 1,145,966
Consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total	1,244,661	$ 1,119,100
Consumer | RICs and auto loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	5,045,821		16,894,821
Year two	14,664,012		12,804,119
Year three	11,480,232		8,120,635
Year four	7,154,106		3,142,369
Year five	2,719,879		1,921,251
Prior	2,174,717		822,164
Total Financing Receivables	$ 43,238,767		$ 43,705,359
Total, percent	100%		100%
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	$ 1,094		$ 479,992
Year two	423,021		1,943,905
Year three	379,004		1,052,016
Year four	195,396		366,896
Year five	59,777		245,621
Prior	73,251		194,308
Total	1,131,543		4,282,738
Consumer | RICs and auto loans | No FICO
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	351,986		1,075,125
Year two	951,574		763,677
Year three	663,701		445,542
Year four	386,928		193,922
Year five	164,092		120,752
Prior	140,861		61,909
Total Financing Receivables	$ 2,659,142		$ 2,660,927
Total, percent	6.10%		6.10%
Consumer | RICs and auto loans | less than 600
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 1,717,899		$ 5,578,707
Year two	5,123,759		4,219,184
Year three	3,787,821		2,791,141
Year four	2,460,390		1,093,652
Year five	945,612		778,438
Prior	994,526		458,350
Total Financing Receivables	$ 15,030,007		$ 14,919,472
Total, percent	34.80%		34.10%
Consumer | RICs and auto loans | 600-639
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 1,012,644		$ 3,324,732
Year two	3,010,813		2,483,763
Year three	2,226,481		1,324,435
Year four	1,166,610		439,996
Year five	379,354		303,441
Prior	351,803		138,715
Total Financing Receivables	$ 8,147,705		$ 8,015,082
Total, percent	18.80%		18.30%
Consumer | RICs and auto loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year			$ 1,574,026
Year two			1,847,059
Year three			1,644,605
Year four			654,214
Year five			267,443
Prior			28,896
Total Financing Receivables			$ 6,016,243
Total, percent			13.80%
Consumer | RICs and auto loans | 640-679
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 658,565		$ 2,535,908
Year two	1,884,000		1,567,064
Year three	1,407,548		718,649
Year four	635,691		234,883
Year five	202,476		169,431
Prior	186,407		69,668
Total Financing Receivables	$ 4,974,687		$ 5,295,603
Total, percent	11.50%		12.10%
Consumer | RICs and auto loans | 680-719
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 463,654		$ 1,754,195
Year two	1,396,779		1,092,896
Year three	981,350		612,871
Year four	545,012		268,978
Year five	234,360		159,209
Prior	158,661		39,934
Total Financing Receivables	$ 3,779,816		$ 3,928,083
Total, percent	8.70%		9%
Consumer | RICs and auto loans | 720-759
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 294,537		$ 1,052,128
Year two	901,701		830,476
Year three	748,759		583,392
Year four	517,135		256,724
Year five	224,668		122,537
Prior	115,983		24,692
Total Financing Receivables	$ 2,802,783		$ 2,869,949
Total, percent	6.60%		6.60%
Consumer | RICs and auto loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 546,536
Year two	1,395,386
Year three	1,664,572
Year four	1,442,340
Year five	569,317
Prior	226,476
Total Financing Receivables	$ 5,844,627
Total, percent	13.50%
Consumer | Personal unsecured loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 186,156		$ 1,663,585
Year two	1,485,947		1,557,960
Year three	1,450,164		516,342
Year four	311,796		50,141
Year five	26,692		20,489
Prior	250,736		254,183
Total Financing Receivables	$ 3,711,491		$ 4,062,700
Total, percent	100%		100%
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year	$ 0		$ 30,001
Year two	34,328		179,550
Year three	56,646		75,237
Year four	16,118		4,837
Year five	667		2,205
Prior	2,064		5,621
Total	109,823		297,451
Consumer | Personal unsecured loans | No FICO
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	7,351		8,080
Year two	0		0
Year three	0		0
Year four	0		0
Year five	0		0
Prior	48		49
Total Financing Receivables	$ 7,399		$ 8,129
Total, percent	0.20%		0.20%
Consumer | Personal unsecured loans | less than 600
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 3		$ 40
Year two	53		62
Year three	41		57
Year four	105		35
Year five	21		32
Prior	2,882		2,883
Total Financing Receivables	$ 3,105		$ 3,109
Total, percent	0.10%		0.10%
Consumer | Personal unsecured loans | 600-639
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 72		$ 7,634
Year two	6,739		11,300
Year three	9,648		1,205
Year four	1,038		418
Year five	352		390
Prior	5,640		5,752
Total Financing Receivables	$ 23,489		$ 26,699
Total, percent	0.60%		0.70%
Consumer | Personal unsecured loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year			$ 350,721
Year two			274,043
Year three			148,550
Year four			20,357
Year five			6,020
Prior			73,743
Total Financing Receivables			$ 873,434
Total, percent			21.50%
Consumer | Personal unsecured loans | 640-679
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 8,481		$ 175,427
Year two	156,270		228,631
Year three	194,299		30,445
Year four	24,571		3,442
Year five	2,961		2,479
Prior	32,020		31,341
Total Financing Receivables	$ 418,602		$ 471,765
Total, percent	11.30%		11.60%
Consumer | Personal unsecured loans | 680-719
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 50,350		$ 610,259
Year two	548,420		599,431
Year three	541,476		154,687
Year four	95,491		10,264
Year five	7,564		5,721
Prior	69,186		69,897
Total Financing Receivables	$ 1,312,487		$ 1,450,259
Total, percent	35.40%		35.60%
Consumer | Personal unsecured loans | 720-759
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 60,304		$ 511,424
Year two	459,873		444,493
Year three	426,872		181,398
Year four	105,254		15,625
Year five	7,367		5,847
Prior	69,117		70,518
Total Financing Receivables	$ 1,128,787		$ 1,229,305
Total, percent	30.40%		30.30%
Consumer | Personal unsecured loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year	$ 59,595
Year two	314,592
Year three	277,828
Year four	85,337
Year five	8,427
Prior	71,843
Total Financing Receivables	$ 817,622
Total, percent	22%

LOANS AND ALLOWANCE FOR CRED_10

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Consumer Lending Asset Quality Indicators - FICO and CLTV Range (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total	[1],[2]	$ 91,679,788		$ 93,047,209
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total		1,268,437	$ 1,145,966
Consumer
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total		54,064,451		55,092,685
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Total		1,244,661	$ 1,119,100
Consumer | Residential mortgages
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		274,139
Year three		271,428		1,085,648
Year four		1,074,334		880,476
Year five		867,980		590,828
Prior		2,512,819		1,985,127
Total		4,726,561		4,816,218
Revolving Loans		0		0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		33
Year three		0		22
Year four		0		0
Year five		0		16
Prior		12		182
Total		12		253
Consumer | Residential mortgages | No FICO score available
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		0
Year three		0		0
Year four		0		0
Year five		0		0
Prior		3,507		2,926
Total		3,507		2,926
Revolving Loans		0		0
Consumer | Residential mortgages | less than 600
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		9,909
Year three		12,524		15,601
Year four		20,550		13,053
Year five		15,271		30,094
Prior		145,170		109,302
Total		193,515		177,959
Revolving Loans		0		0
Consumer | Residential mortgages | FICO score of 600 to 679
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		20,516
Year three		21,964		43,327
Year four		47,937		32,157
Year five		31,063		51,103
Prior		220,680		189,585
Total		321,644		336,688
Revolving Loans		0		0
Consumer | Residential mortgages | FICO score of 680 to 759
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		83,098
Year three		70,445		256,737
Year four		220,738		202,173
Year five		192,388		160,961
Prior		661,083		517,085
Total		1,144,654		1,220,054
Revolving Loans		0		0
Consumer | Residential mortgages | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		160,616
Year three		166,495		769,983
Year four		785,109		633,093
Year five		629,258		348,670
Prior		1,482,379		1,166,229
Total		3,063,241		3,078,591
Revolving Loans		0		0
Consumer | Residential mortgages | No LTV available
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		0
Year three		0		0
Year four		0		0
Year five		0		0
Prior		2,747		2,156
Total		2,747		2,156
Revolving Loans		0		0
Consumer | Residential mortgages | LTV less than or equal to 70%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		190,214
Year three		189,887		1,024,024
Year four		1,019,015		880,476
Year five		867,980		590,828
Prior		2,504,019		1,977,309
Total		4,580,901		4,662,851
Revolving Loans		0		0
Consumer | Residential mortgages | LTV of 70.01% - 110%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		83,925
Year three		81,541		61,624
Year four		55,319		0
Year five		0		0
Prior		5,681		5,287
Total		142,541		150,836
Revolving Loans		0		0
Consumer | Residential mortgages | LTV greater than 110%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		0
Year three		0		0
Year four		0		0
Year five		0		0
Prior		372		375
Total		372		375
Revolving Loans		0		0
Consumer | Home equity loans and lines of credit
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		49,587
Year three		48,225		174,233
Year four		166,265		183,106
Year five		175,274		234,649
Prior		1,945,317		1,806,879
Total		2,335,081		2,448,454
Revolving Loans		2,234,324		2,346,640
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		0
Year three		0		0
Year four		0		253
Year five		0		17
Prior		2,507		1,330
Total		2,507		1,600
Consumer | Home equity loans and lines of credit | No FICO score available
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		703
Year three		724		2,471
Year four		2,495		2,597
Year five		2,631		3,328
Prior		54,444		52,044
Total		60,294		61,143
Revolving Loans		36,587		36,854
Consumer | Home equity loans and lines of credit | less than 600
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		430
Year three		697		2,774
Year four		2,913		3,942
Year five		5,403		6,652
Prior		135,875		126,607
Total		144,888		140,405
Revolving Loans		126,879		123,232
Consumer | Home equity loans and lines of credit | FICO score of 600 to 679
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		3,325
Year three		1,915		8,624
Year four		9,421		9,080
Year five		9,460		24,357
Prior		227,775		215,826
Total		248,571		261,212
Revolving Loans		231,058		242,747
Consumer | Home equity loans and lines of credit | FICO score of 680 to 759
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		16,781
Year three		17,432		60,151
Year four		52,431		61,256
Year five		58,706		73,166
Prior		622,422		576,663
Total		750,991		788,017
Revolving Loans		733,658		771,495
Consumer | Home equity loans and lines of credit | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		28,348
Year three		27,457		100,213
Year four		99,005		106,231
Year five		99,074		127,146
Prior		904,801		835,739
Total		1,130,337		1,197,677
Revolving Loans		1,106,142		1,172,312
Consumer | Home equity loans and lines of credit | No LTV available
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		1,577
Year three		1,714		3,904
Year four		4,591		3,848
Year five		4,418		3,747
Prior		56,733		53,593
Total		67,456		66,669
Revolving Loans		43,745		42,375
Consumer | Home equity loans and lines of credit | LTV less than or equal to 70%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		43,661
Year three		42,007		168,205
Year four		160,111		179,258
Year five		170,856		230,879
Prior		1,875,850		1,737,887
Total		2,248,824		2,359,890
Revolving Loans		2,174,539		2,285,157
Consumer | Home equity loans and lines of credit | LTV of 70.01% - 110%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		3,742
Year three		3,883		1,968
Year four		1,409		0
Year five		0		23
Prior		11,602		13,630
Total		16,894		19,363
Revolving Loans		14,133		16,576
Consumer | Home equity loans and lines of credit | LTV greater than 110%
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		0		0
Year two		0		607
Year three		621		156
Year four		154		0
Year five		0		0
Prior		1,132		1,769
Total		1,907		2,532
Revolving Loans		1,907		2,532
Consumer | Personal unsecured loans
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		186,156		1,663,585
Year two		1,485,947		1,557,960
Year three		1,450,164		516,342
Year four		311,796		50,141
Year five		26,692		20,489
Prior		250,736		254,183
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Current fiscal year		0		30,001
Year two		34,328		179,550
Year three		56,646		75,237
Year four		16,118		4,837
Year five		667		2,205
Prior		2,064		5,621
Total		109,823		297,451
Consumer | Personal unsecured loans | less than 600
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		3		40
Year two		53		62
Year three		41		57
Year four		105		35
Year five		21		32
Prior		2,882		2,883
Consumer | Personal unsecured loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		59,595
Year two		314,592
Year three		277,828
Year four		85,337
Year five		8,427
Prior		71,843
Consumer | Personal unsecured loans | No FICO
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		7,351		8,080
Year two		0		0
Year three		0		0
Year four		0		0
Year five		0		0
Prior		48		49
Consumer | Personal unsecured loans | 600-639
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		72		7,634
Year two		6,739		11,300
Year three		9,648		1,205
Year four		1,038		418
Year five		352		390
Prior		5,640		5,752
Consumer | Personal unsecured loans | 640-679
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		8,481		175,427
Year two		156,270		228,631
Year three		194,299		30,445
Year four		24,571		3,442
Year five		2,961		2,479
Prior		32,020		31,341
Consumer | Personal unsecured loans | 680-719
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		50,350		610,259
Year two		548,420		599,431
Year three		541,476		154,687
Year four		95,491		10,264
Year five		7,564		5,721
Prior		69,186		69,897
Consumer | Personal unsecured loans | 720-759
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year		60,304		511,424
Year two		459,873		444,493
Year three		426,872		181,398
Year four		105,254		15,625
Year five		7,367		5,847
Prior		$ 69,117		70,518
Consumer | Personal unsecured loans | >=760
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Current fiscal year				350,721
Year two				274,043
Year three				148,550
Year four				20,357
Year five				6,020
Prior				$ 73,743
[1]Includes $12.5 million and $13.9 million of loans recorded at fair value at March 31, 2024 and December 31, 2023, respectively.[2]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

LOANS AND ALLOWANCE FOR CRED_11

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Basis Loans Modified (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 345,433	$ 243,013
% of Total Class of Financing Receivable	0.37%	0.25%
All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 36,982	$ 194,808
% of Total Class of Financing Receivable	0.04%	0.20%
Commercial: | CRE | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 98,453	$ 190
% of Total Class of Financing Receivable	1.04%	0%
Commercial: | C&I loans | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 1,910	$ 1,926
% of Total Class of Financing Receivable	0.02%	0.01%
Commercial: | C&I loans | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 948	$ 798
% of Total Class of Financing Receivable	0.01%	0.01%
Commercial: | Other commercial | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 51	$ 0
% of Total Class of Financing Receivable	0%	0%
Consumer: | Residential mortgages | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 290	$ 0
% of Total Class of Financing Receivable	0.01%	0%
Consumer: | Home equity loans and lines of credit | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 2,134	$ 653
% of Total Class of Financing Receivable	0.09%	0.02%
Consumer: | RICs and auto loans | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 245,019	$ 240,897
% of Total Class of Financing Receivable	0.57%	0.56%
Term increase from modification (up to)	8 months
Consumer: | RICs and auto loans | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 33,567	$ 193,357
% of Total Class of Financing Receivable	0.08%	0.44%
Term increase from modification (up to)	36 months
Consumer: | Other consumer | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 43	$ 0
% of Total Class of Financing Receivable	0.08%	0%

LOANS AND ALLOWANCE FOR CRED_12

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Basis Performance of Modified Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Current
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 1,050,644	$ 398,610
30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	307,340	38,864
90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	37,977	347
Commercial: | CRE | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	256,931	190
Commercial: | CRE | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	13,083	0
Commercial: | CRE | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	7,144	0
Commercial: | C&I loans | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	47,701	2,452
Commercial: | C&I loans | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	6,661	272
Commercial: | C&I loans | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	378	0
Commercial: | Multifamily loans | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	8,885
Commercial: | Multifamily loans | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	15,348
Commercial: | Multifamily loans | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	8,536
Commercial: | Other commercial | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	318
Commercial: | Other commercial | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	0
Commercial: | Other commercial | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	51
Consumer: | Residential mortgages | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	4,568
Consumer: | Residential mortgages | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	104
Consumer: | Residential mortgages | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	0
Consumer: | Home equity loans and lines of credit | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	6,297	631
Consumer: | Home equity loans and lines of credit | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	509	22
Consumer: | Home equity loans and lines of credit | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	146	0
Consumer: | RICs and auto loans | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	725,914	395,337
Consumer: | RICs and auto loans | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	271,635	38,570
Consumer: | RICs and auto loans | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	21,709	$ 347
Consumer: | Other consumer | Current
Financing Receivable, Modified [Line Items]
Amortized Cost	30
Consumer: | Other consumer | 30-89 DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	0
Consumer: | Other consumer | 90+ DPD
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 13

LOANS AND ALLOWANCE FOR CRED_13

LOANS AND ALLOWANCE FOR CREDIT LOSSES - Amortized Cost Basis Payment Defaults Prior Modification - Preceding 12 Months (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 28,518	$ 313
All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	8,981	494
Commercial: | C&I loans | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	90
Commercial: | C&I loans | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	68
Consumer: | RICs and auto loans | Payment Deferral Only
Financing Receivable, Modified [Line Items]
Amortized Cost	28,428	313
Consumer: | RICs and auto loans | All Other Modifications
Financing Receivable, Modified [Line Items]
Amortized Cost	$ 8,913	$ 494

OPERATING LEASE ASSETS, NET - C

OPERATING LEASE ASSETS, NET - Components of Leased Vehicles, Net (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Operating Leased Assets [Line Items]
Less: accumulated depreciation		$ (3,300,000)	$ (3,500,000)
Total operating lease assets, net	[1],[2]	13,642,137	13,782,840
Leased vehicles
Operating Leased Assets [Line Items]
Operating leases		17,064,556	17,548,952
Less: accumulated depreciation		(3,255,044)	(3,546,875)
Depreciated net capitalized cost		13,809,512	14,002,077
Manufacturer subvention payments, net of accretion		(636,292)	(593,004)
Unamortized origination fees and other costs		468,917	373,767
Total operating lease assets, net		13,642,137	13,782,840
Commercial equipment vehicles and aircraft
Operating Leased Assets [Line Items]
Operating leases		0	0
Less: accumulated depreciation		0	0
Total operating lease assets, net		$ 0	$ 0
[1]Net of accumulated depreciation of $3.3 billion and $3.5 billion at March 31, 2024 and December 31, 2023, respectively.[2]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

OPERATING LEASE ASSETS, NET - F

OPERATING LEASE ASSETS, NET - Future Minimum Rental Receivables (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Leases [Abstract]
2024	$ 1,629,446
2025	1,552,937
2026	810,714
2027	73,060
2028	74
Thereafter	0
Total	$ 4,066,231

OPERATING LEASE ASSETS, NET - N

OPERATING LEASE ASSETS, NET - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Leases [Abstract]
Net gain on sale of operating leases	$ 22,759	$ 22,383

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLES - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Goodwill [Line Items]
Goodwill at March 31, 2024	$ 2,766,665	$ 2,766,665
Auto
Goodwill [Line Items]
Goodwill at March 31, 2024	1,238,676
CBB
Goodwill [Line Items]
Goodwill at March 31, 2024	159,027
C&I
Goodwill [Line Items]
Goodwill at March 31, 2024	52,198
CRE
Goodwill [Line Items]
Goodwill at March 31, 2024	1,015,130
CIB
Goodwill [Line Items]
Goodwill at March 31, 2024	$ 301,634

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLES - Narrative (Details) - USD ($)		3 Months Ended
	Oct. 01, 2023	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment of goodwill	$ 0
Intangibles not subject to amortization		$ 0		$ 0
Amortization of intangibles		$ 9,581,000	$ 10,446,000

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLES - Finite-lived Intangibles (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 277,577	$ 287,159
Accumulated Amortization	(423,477)	(413,895)
Dealer networks
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	231,083	236,958
Accumulated Amortization	(238,917)	(233,042)
Stellantis relationship
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	4,515	5,436
Accumulated Amortization	(134,235)	(133,314)
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	41,979	44,765
Accumulated Amortization	$ (50,325)	$ (47,539)

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLES - Future Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Calendar Year Amount
Calendar Year Amount	$ 37,900
Recorded To Date	9,581	$ 10,446
2024	28,319
2025	34,783
2026	32,492
2027	28,646
2028	26,340
Thereafter	$ 126,997

OTHER ASSETS - Components (Deta

OTHER ASSETS - Components (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Operating lease ROU assets		$ 397,251	$ 435,633
Deferred tax assets		235,025	234,309
Accrued interest receivable		823,415	827,704
Derivative assets at fair value		1,160,331	1,090,194
Other real estate owned and other repossessed assets		288,997	291,280
Equity method investments		321,078	306,313
MSRs		95,776	94,266
Income tax receivables		428,316	478,305
Prepaid expense		257,089	242,273
Miscellaneous assets and receivables		880,298	583,607
Total Other assets	[1],[2]	$ 4,887,576	$ 4,583,884
Operating lease, right-of-use asset, statement of financial position [extensible enumeration]		Total Other assets	Total Other assets
[1]Includes MSRs of $95.8 million and $94.3 million at March 31, 2024 and December 31, 2023, respectively, for which the Company has elected the FVO.[2]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

OTHER ASSETS - Narrative (Detai

OTHER ASSETS - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) option	Mar. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Number of options to renew | option	1
Operating lease expense	$ 34.1	$ 43
Sublease income	$ 0.9	$ 1
Minimum
Lessee, Lease, Description [Line Items]
Renewal term (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal term (in years)	5 years

OTHER ASSETS - Maturity of Leas

OTHER ASSETS - Maturity of Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
2024	$ 103,668
2025	117,580
2026	89,377
2027	77,253
2028	43,490
Thereafter	95,084
Total lease liabilities	526,452
Less: Interest	(42,083)
Present value of lease liabilities	$ 484,369	$ 511,400

OTHER ASSETS - Supplemental Bal

OTHER ASSETS - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Operating lease ROU assets	$ 397,251	$ 435,633
Other liabilities	$ 484,369	$ 511,400
Operating lease, liability, statement of financial position [extensible list]	Various other liabilities	Various other liabilities
Weighted-average remaining lease term (years)	5 years 7 months 6 days	5 years 7 months 6 days
Weighted-average discount rate	3.10%	3.10%

OTHER ASSETS - Other Informatio

OTHER ASSETS - Other Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Operating cash flows from operating leases	$ (35,699)	$ (38,391)
Leased assets obtained in exchange for new operating lease liabilities	$ 6,286	$ 14,257

VIEs - Narrative (Details)

VIEs - Narrative (Details)	1 Months Ended	3 Months Ended
	Nov. 30, 2023	Mar. 31, 2024 USD ($) class	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Variable Interest Entity [Line Items]
Number of classes of notes payable backed by collateral | class		1
Debt securities, held-to-maturity, excluding accrued interest, after allowance for credit loss		$ 8,969,064,000		$ 9,039,704,000
Credit loss reversal		$ (408,534,000)	$ (542,249,000)
FDIC | Structured LLC
Variable Interest Entity [Line Items]
Equity ownership, excluding consolidated entity and equity method investee, percentage		20%		20%
Joint venture, acquired amount		$ 1,100,000,000		$ 1,100,000,000
SBNA Auto Lease Trust (SBALT) | Structured LLC
Variable Interest Entity [Line Items]
Joint venture, acquired amount		8,900,000,000
Fee Income		9,900,000
VIEs, Primary Beneficiary
Variable Interest Entity [Line Items]
Net proceeds from new securitizations		481,400,000
VIEs, Primary Beneficiary | Trusts
Variable Interest Entity [Line Items]
Gross retail installment contracts transferred to consolidated Trusts		29,400,000,000		28,700,000,000
Net proceeds from new securitizations		4,011,360,000	792,050,000
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Net proceeds from new securitizations		1,003,695,000	0
Total serviced for other portfolio		1,900,000,000		973,900,000
Receivables securitized		1,060,931,000	0
Pre-tax loss on securitization of financial assets		42,300,000
Debt securities, held-to-maturity, excluding accrued interest, after allowance for credit loss		53,000,000
Credit loss reversal		96,000,000
Percent of shares of each new tranche purchased that did not issue debt and equity tranches	5%
Gain (loss) on retail installment contracts			$ 0
VIE, Not Primary Beneficiary | Debt
Variable Interest Entity [Line Items]
VIE, maximum exposure to loss		82,000,000		29,700,000
VIE, Not Primary Beneficiary | Equity Investments
Variable Interest Entity [Line Items]
VIE, maximum exposure to loss		$ 4,600,000		$ 2,800,000

VIEs - Assets and Liabilities o

VIEs - Assets and Liabilities of VIEs (Details) - USD ($) $ in Thousands		Mar. 31, 2024		Dec. 31, 2023		Mar. 31, 2023
Assets
Restricted cash		$ 5,365,963	[1]	$ 5,549,701	[1]	$ 6,300,000
LHFI	[1],[2]	91,679,788		93,047,209
Operating lease assets, net	[1],[3]	13,642,137		13,782,840
Various other assets	[1],[4]	4,887,576		4,583,884
TOTAL ASSETS		165,765,740		164,972,575		$ 177,557,843
Liabilities
Various other liabilities	[1]	1,779,359		1,848,557
TOTAL LIABILITIES		147,902,905		147,471,666
Leased vehicles
Assets
Operating lease assets, net		13,642,137		13,782,840
VIEs, Primary Beneficiary
Assets
Restricted cash		1,003,547		864,464
LHFI		25,065,413		25,144,797
Operating lease assets, net		13,642,137		13,782,840
Various other assets		701,005		637,987
TOTAL ASSETS		40,412,102		40,430,088
Liabilities
Notes payable		25,699,422		25,087,655
Various other liabilities		111,313		119,280
TOTAL LIABILITIES		25,810,735		25,206,935
VIEs, Primary Beneficiary | Leased vehicles
Assets
Operating lease assets, net		$ 7,000,000		$ 7,800,000
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.[2]Includes $12.5 million and $13.9 million of loans recorded at fair value at March 31, 2024 and December 31, 2023, respectively.[3]Net of accumulated depreciation of $3.3 billion and $3.5 billion at March 31, 2024 and December 31, 2023, respectively.[4]Includes MSRs of $95.8 million and $94.3 million at March 31, 2024 and December 31, 2023, respectively, for which the Company has elected the FVO.

VIEs - Cash Flow Summary (Detai

VIEs - Cash Flow Summary (Details) - VIEs, Primary Beneficiary - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Variable Interest Entity [Line Items]
Net proceeds from new securitizations	$ 481,400
Trusts
Variable Interest Entity [Line Items]
Assets securitized	5,234,923	$ 1,382,583
Net proceeds from new securitizations	4,011,360	792,050
Net proceeds on retained bonds from new securitizations	733,880	255,669
Cash received for servicing fees	222,352	240,381
Net distributions from Trusts	1,038,012	572,348
Total cash received from Trusts	$ 6,005,604	$ 1,860,448

VIEs - Cash Flows Received (Det

VIEs - Cash Flows Received (Details) - VIE, Not Primary Beneficiary - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Variable Interest Entity [Line Items]
Receivables securitized	$ 1,060,931,000	$ 0
Net proceeds from new securitizations	1,003,695,000	0
Cash received for servicing fees	1,344,000	2,060,000
Total cash received from Trusts	$ 1,005,039,000	$ 2,060,000

DEPOSITS AND OTHER CUSTOMER A_3

DEPOSITS AND OTHER CUSTOMER ACCOUNTS - Summary of Deposits and Other Customer Accounts (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance
Interest-bearing demand deposits	$ 12,251,256	$ 11,591,982
Non-interest-bearing demand deposits	15,177,900	15,504,947
Savings	4,213,934	4,428,281
Customer repurchase accounts	240,728	238,523
Money market	25,037,492	25,361,575
CDs	20,763,160	19,947,868
Total deposits	$ 77,684,470	$ 77,073,176
Percent of total deposits
Interest-bearing demand deposits (as a percent)	15.80%	15%
Non-interest-bearing demand deposits (as a percent)	19.50%	20.10%
Savings (as a percent)	5.40%	5.70%
Customer repurchase accounts (as a percent)	0.30%	0.30%
Money market (as a percent)	32.30%	33%
CDs (as a percent)	26.70%	25.90%
Total deposits (as a percent)	100%	100%
Foreign deposits	$ 5,200,000	$ 5,400,000

DEPOSITS AND OTHER CUSTOMER A_4

DEPOSITS AND OTHER CUSTOMER ACCOUNTS - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Demand deposit overdrafts that have been reclassified as loan balances	$ 186.7	$ 107.6
CD in denominations greater than $250,000	5,900	5,600
FHLB advances | SBNA
Financial Instruments Owned and Pledged as Collateral [Line Items]
Letters of credit	$ 0	$ 40

BORROWINGS - Narrative (Details

BORROWINGS - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended
		Apr. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total borrowings and other debt obligations	[1]		$ 43,911,347,000	$ 44,144,051,000
VIEs, Primary Beneficiary
Debt Instrument [Line Items]
Total borrowings and other debt obligations			25,700,000,000	$ 25,100,000,000
Net proceeds from new securitizations			481,400,000
SDART Platform | Auto
Debt Instrument [Line Items]
On-balance sheet securitization transaction			1,500,000,000
On-balance sheet securitization transaction, retained			332,400,000
SDART Platform | Auto | Subsequent Event
Debt Instrument [Line Items]
On-balance sheet securitization transaction		$ 1,600,000,000
On-balance sheet securitization transaction, retained		$ 134,400,000
DRIVE Platform | Auto
Debt Instrument [Line Items]
On-balance sheet securitization transaction			1,100,000,000
On-balance sheet securitization transaction, retained			164,000,000
SBNA Auto Lease Trust (SBALT) | Auto
Debt Instrument [Line Items]
On-balance sheet securitization transaction			1,700,000,000
On-balance sheet securitization transaction, retained			237,500,000
Fixed-to-Floating Rate Senior Notes due January 2030 | Senior notes
Debt Instrument [Line Items]
Debt issued			$ 1,000,000,000
Stated interest rate			6.17%
Credit-linked notes due December 2031
Debt Instrument [Line Items]
Redemption option, UPB threshold			10%
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

BORROWINGS - Parent Company and

BORROWINGS - Parent Company and other Subsidiary Borrowings and Debt Obligations (Details) - USD ($)		3 Months Ended
		Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Jan. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, gross		$ 12,248,815,000	$ 11,249,393,000
Total Parent Company and subsidiaries' borrowings and other debt obligations	[1]	43,911,347,000	44,144,051,000
Parent Company and Subsidiaries
Debt Instrument [Line Items]
Total Parent Company and subsidiaries' borrowings and other debt obligations		43,911,347,000	44,144,051,000
Subsidiaries
Debt Instrument [Line Items]
Total subsidiary borrowings and other debt obligations		$ 31,662,532,000	32,894,658,000
Subsidiaries | Minimum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread (as a percent)		4.15%
Subsidiaries | Maximum | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread (as a percent)		13.90%
Subsidiaries | Short-term borrowing due within one year, maturing thru March 2024
Debt Instrument [Line Items]
Short-term borrowings		$ 0	$ 427,531,000
Effective Rate		0%	4.66%
Subsidiaries | Short-term borrowing due within one year, maturing thru June 2024
Debt Instrument [Line Items]
Short-term borrowings		$ 260,786,000	$ 0
Effective Rate		4.19%	0%
Subsidiaries | FHLB advances, maturing through April 2027
Debt Instrument [Line Items]
Long-term debt, gross		$ 4,951,510,000	$ 6,584,791,000
Effective Rate		4.93%	5.04%
Subsidiaries | Credit-linked notes due December 2031
Debt Instrument [Line Items]
Long-term debt, gross		$ 74,156,000	$ 89,812,000
Effective Rate		3.81%	3.51%
Debt issued									$ 298,000,000
Reference pool									2,000,000,000
Contractual residual amount									$ 36,000,000
Subsidiaries | Credit-linked notes due May 2032
Debt Instrument [Line Items]
Long-term debt, gross		$ 181,549,000	$ 214,941,000
Effective Rate		7.56%	7.25%
Debt issued								$ 521,500,000
Reference pool								3,500,000,000
Contractual residual amount								$ 63,000,000
Subsidiaries | Credit linked notes due August 2032
Debt Instrument [Line Items]
Long-term debt, gross		$ 160,484,000	$ 188,282,000
Effective Rate		9.60%	9.12%
Debt issued							$ 374,500,000
Reference pool							3,500,000,000
Contractual residual amount							$ 63,000,000
Subsidiaries | Credit linked notes due December 2032
Debt Instrument [Line Items]
Long-term debt, gross		$ 218,327,000	$ 246,497,000
Effective Rate		10.51%	10.16%
Debt issued						$ 388,400,000
Reference pool						3,600,000,000
Contractual residual amount						$ 65,300,000
Subsidiaries | Credit-linked notes due June 2033
Debt Instrument [Line Items]
Long-term debt, gross		$ 80,822,000	$ 89,787,000
Effective Rate		10.59%	10.26%
Debt issued				$ 115,500,000
Reference pool				1,100,000,000
Contractual residual amount				$ 22,000,000
Subsidiaries | Credit Linked notes due December 2033
Debt Instrument [Line Items]
Long-term debt, gross		$ 205,108,000	$ 206,033,000
Effective Rate		9.25%	9.24%
Debt issued			$ 207,800,000
Reference pool			2,100,000,000
Contractual residual amount			62,300,000
Subsidiaries | Credit-linked notes due February 2052
Debt Instrument [Line Items]
Long-term debt, gross		$ 115,520,000	$ 118,246,000
Effective Rate		11.92%	11.92%
Debt issued					$ 131,600,000
Reference pool					2,500,000,000
Contractual residual amount					$ 5,100,000
Subsidiaries | Warehouse lines, maturing through February 2026
Debt Instrument [Line Items]
Long-term debt, gross		$ 3,371,578,000	$ 3,618,378,000
Effective Rate		7.61%	6.93%
Subsidiaries | Secured structured financings maturing through December 2031
Debt Instrument [Line Items]
Long-term debt, gross		$ 20,042,692,000	$ 19,110,360,000
Subsidiaries | Secured structured financings maturing through December 2031 | Minimum
Debt Instrument [Line Items]
Effective Rate		0.48%	0.48%
Subsidiaries | Secured structured financings maturing through December 2031 | Maximum
Debt Instrument [Line Items]
Effective Rate		7.69%	7.69%
Senior notes | 3.50% senior notes due June 2024
Debt Instrument [Line Items]
Stated interest rate		3.50%
Long-term debt, gross		$ 999,813,000	$ 999,559,000
Effective Rate		3.50%	3.50%
Senior notes | 3.45% senior notes due June 2025
Debt Instrument [Line Items]
Stated interest rate		3.45%
Long-term debt, gross		$ 998,634,000	$ 998,329,000
Effective Rate		3.45%	3.45%
Senior notes | 4.26% senior notes due June 2025
Debt Instrument [Line Items]
Stated interest rate		4.26%
Long-term debt, gross		$ 499,842,000	$ 499,634,000
Effective Rate		4.43%	4.43%
Senior notes | 4.50% senior notes due July 2025
Debt Instrument [Line Items]
Stated interest rate		4.50%
Long-term debt, gross		$ 1,099,104,000	$ 1,098,937,000
Effective Rate		4.50%	4.50%
Senior notes | Senior notes due April 2026
Debt Instrument [Line Items]
Long-term debt, gross		$ 433,464,000	$ 433,450,000
Effective Rate		6.01%	6.02%
Senior notes | Senior notes due September 2026
Debt Instrument [Line Items]
Stated interest rate		5.81%
Long-term debt, gross		$ 499,212,000	$ 499,082,000
Effective Rate		5.92%	5.92%
Senior notes | Senior notes due September 2026 | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread (as a percent)		1.35%
Senior notes | 3.24% senior notes due October 2026
Debt Instrument [Line Items]
Stated interest rate		3.24%
Long-term debt, gross		$ 932,325,000	$ 930,768,000
Effective Rate		3.24%	3.24%
Senior notes | 6.89% senior notes due June 2027 (1)
Debt Instrument [Line Items]
Stated interest rate		6.89%
Long-term debt, gross		$ 750,000,000	$ 750,000,000
Effective Rate		6.89%	6.89%
Senior notes | 4.40% senior notes due July 2027
Debt Instrument [Line Items]
Stated interest rate		4.40%
Long-term debt, gross		$ 1,049,651,000	$ 1,049,641,000
Effective Rate		4.40%	4.40%
Senior notes | 2.49% senior notes due January 2028
Debt Instrument [Line Items]
Stated interest rate		2.49%
Long-term debt, gross		$ 997,776,000	$ 997,582,000
Effective Rate		2.57%	2.57%
Senior notes | 6.50% senior notes due March 2029
Debt Instrument [Line Items]
Stated interest rate		6.50%
Long-term debt, gross		$ 996,758,000	$ 996,580,000
Effective Rate		6.59%	6.59%
Senior notes | 6.57% senior notes due June 2029
Debt Instrument [Line Items]
Stated interest rate		6.57%
Long-term debt, gross		$ 498,130,000	$ 498,034,000
Effective Rate		6.67%	6.67%
Senior notes | 6.17% senior notes due January 2030
Debt Instrument [Line Items]
Stated interest rate		6.17%
Long-term debt, gross		$ 996,259,000	$ 0
Effective Rate		6.26%	0%
Senior notes | $7.66% senior notes due November 2031
Debt Instrument [Line Items]
Stated interest rate		7.66%
Long-term debt, gross		$ 497,847,000	$ 497,797,000
Effective Rate		7.73%	7.73%
Senior notes | 6.98% senior notes, due October 2025
Debt Instrument [Line Items]
Long-term debt, gross			$ 2,000,000,000
Effective Rate		6.98%	6.98%
Senior notes | Subsidiaries | 6.98% senior notes, due October 2025
Debt Instrument [Line Items]
Stated interest rate		6.98%
Long-term debt, gross		$ 2,000,000,000
Subordinated debt | 2.88% subordinated notes, due November 2031
Debt Instrument [Line Items]
Stated interest rate		2.88%
Long-term debt, gross		$ 500,000,000	$ 500,000,000
Effective Rate		2.88%	2.88%
Subordinated debt | 7.18% senior notes due December 2032
Debt Instrument [Line Items]
Stated interest rate		7.18%
Long-term debt, gross		$ 500,000,000	$ 500,000,000
Effective Rate		7.18%	7.18%
[1]The Company has interests in certain Trusts that are considered VIEs for accounting purposes. At March 31, 2024 and December 31, 2023, LHFI included $25.1 billion and $25.1 billion, Operating leases assets, net included $13.6 billion and $13.8 billion, restricted cash included $1.0 billion and $864.5 million, Other assets included $701.0 million and $638.0 million, Borrowings and other debt obligations included $25.7 billion and $25.1 billion, and Other liabilities included $111.3 million and $119.3 million of assets or liabilities, respectively, that were included within VIEs. See Note 7 to these Condensed Consolidated Financial Statements for additional information.

BORROWINGS - Warehouse Lines (D

BORROWINGS - Warehouse Lines (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Balance	$ 57,200	$ 60,800
SC
Debt Instrument [Line Items]
Balance	52,715,902
Assets Pledged	31,448,081
Restricted Cash Pledged	997,141
SC | Revolving Credit Facilities With Third Parties
Debt Instrument [Line Items]
Balance	3,371,578
Committed Amount	$ 6,400,000
Effective Rate	7.61%
Assets Pledged	$ 4,833,088
Restricted Cash Pledged	6,404
SC | Revolving Credit Facilities With Third Parties | Warehouse line due April 2025
Debt Instrument [Line Items]
Balance	250,700
Committed Amount	$ 1,000,000
Effective Rate	8.25%
Assets Pledged	$ 396,342
Restricted Cash Pledged	0
SC | Revolving Credit Facilities With Third Parties | Warehouse line due July 2025
Debt Instrument [Line Items]
Balance	273,000
Committed Amount	$ 600,000
Effective Rate	7.07%
Assets Pledged	$ 326,067
Restricted Cash Pledged	3,236
SC | Revolving Credit Facilities With Third Parties | Warehouse line due July 2025
Debt Instrument [Line Items]
Balance	26,200
Committed Amount	$ 500,000
Effective Rate	12.41%
Assets Pledged	$ 38,594
Restricted Cash Pledged	0
SC | Revolving Credit Facilities With Third Parties | Warehouse line due October 2025
Debt Instrument [Line Items]
Balance	927,100
Committed Amount	$ 2,100,000
Effective Rate	6.26%
Assets Pledged	$ 1,332,501
Restricted Cash Pledged	64
SC | Revolving Credit Facilities With Third Parties | Warehouse line due November 2025
Debt Instrument [Line Items]
Balance	483,000
Committed Amount	$ 500,000
Effective Rate	4.09%
Assets Pledged	$ 677,604
Restricted Cash Pledged	0
SC | Revolving Credit Facilities With Third Parties | Warehouse line due January 2026
Debt Instrument [Line Items]
Balance	999,500
Committed Amount	$ 1,000,000
Effective Rate	10.82%
Assets Pledged	$ 1,450,629
Restricted Cash Pledged	2,598
SC | Revolving Credit Facilities With Third Parties | Warehouse line due February 2026
Debt Instrument [Line Items]
Balance	412,078
Committed Amount	$ 700,000
Effective Rate	6.59%
Assets Pledged	$ 611,351
Restricted Cash Pledged	$ 506

BORROWINGS - Secured Structured

BORROWINGS - Secured Structured Financings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Initial Note Amounts Issued	$ 57,200	$ 60,800
SC
Debt Instrument [Line Items]
Balance	20,042,692
Initial Note Amounts Issued	52,715,902
Collateral	31,448,081
Restricted Cash	$ 997,141
SC | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	0.48%
SC | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	7.69%
SC | Public securitizations maturing on various dates
Debt Instrument [Line Items]
Balance	$ 17,109,213
Initial Note Amounts Issued	45,365,875
Collateral	26,620,341
Restricted Cash	$ 994,399
SC | Public securitizations maturing on various dates | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	0.48%
SC | Public securitizations maturing on various dates | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	7.69%
SC | Privately issued amortizing notes maturing on various dates
Debt Instrument [Line Items]
Balance	$ 2,933,479
Initial Note Amounts Issued	7,350,027
Collateral	4,827,740
Restricted Cash	$ 2,742
SC | Privately issued amortizing notes maturing on various dates | Minimum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	2.17%
SC | Privately issued amortizing notes maturing on various dates | Maximum
Debt Instrument [Line Items]
Initial Weighted Average Interest Rate Range	6.73%

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income/(loss), pre-tax activity	$ 85,878	$ 187,801
Total other comprehensive income/(loss), tax effect	(22,757)	(67,112)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	63,121	120,689
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	15,500,909	17,429,722
Net Activity	63,121	120,689
Ending Balance	15,862,835	17,545,383
Accumulated other comprehensive loss, net of taxes
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,065,568)	(1,336,023)
Ending Balance	(1,002,447)	(1,215,334)
Net unrealized gains/(losses) on cash flow hedge derivative financial instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income/(loss), pre-tax activity		120,728
Other comprehensive income/(loss), tax effect		(34,858)
Other comprehensive income/(loss), net activity	51,300	85,870
Reclassification adjustment, pre-tax activity		3,856
Reclassification adjustment, tax effect		(757)
Reclassification adjustment, net activity	0	3,099
Total other comprehensive income/(loss), pre-tax activity	67,037	124,584
Total other comprehensive income/(loss), tax effect	(15,738)	(35,615)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	51,299	88,969
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(254,519)	(515,664)
Net Activity	51,299	88,969
Ending Balance	(203,220)	(426,695)
Net unrealized gains/(losses) on investments in debt securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income/(loss), pre-tax activity		25,602
Other comprehensive income/(loss), tax effect		(24,072)
Other comprehensive income/(loss), net activity		1,530
Reclassification adjustment, pre-tax activity		36,960
Reclassification adjustment, tax effect		(7,255)
Reclassification adjustment, net activity		29,705
Total other comprehensive income/(loss), pre-tax activity	18,594	62,562
Total other comprehensive income/(loss), tax effect	(6,955)	(31,327)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	11,639	31,235
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(790,551)	(796,572)
Net Activity	11,639	31,235
Ending Balance	(778,912)	(765,337)
Pension and post-retirement actuarial gain/(loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income/(loss), pre-tax activity	247	655
Total other comprehensive income/(loss), tax effect	(64)	(170)
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAX	183	485
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(20,498)	(23,787)
Net Activity	183	485
Ending Balance	$ (20,315)	$ (23,302)

SECURITIES FINANCING ACTIVITI_3

SECURITIES FINANCING ACTIVITIES - Securities Borrowed and Purchased under Agreements to Resell (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Banking and Thrift, Other Disclosure [Abstract]
Securities purchased under agreements to resell	$ 7,628,806	$ 8,617,309
Securities borrowed	1,837,001	1,621,405
Total	$ 9,465,807	$ 10,238,714

SECURITIES FINANCING ACTIVITI_4

SECURITIES FINANCING ACTIVITIES - Securities Loaned or Sold under Agreements to Repurchase (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Banking and Thrift, Other Disclosure [Abstract]
Securities sold under agreements to repurchase	$ 16,164,434	$ 16,290,761
Securities lending	17	25
Total	$ 16,164,451	$ 16,290,786

SECURITIES FINANCING ACTIVITI_5

SECURITIES FINANCING ACTIVITIES - Gross and Net Resale Repurchase Agreements, Securities Borrowing and Lending Agreements and the Related Offsetting Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Securities purchased under agreements to resell
Gross amounts of recognized assets	$ 53,209,700	$ 41,237,731
Gross amounts offset on the Condensed Consolidated Balance Sheets	(45,580,894)	(32,620,422)
Net amounts of assets included on the Condensed Consolidated Balance Sheets	7,628,806	8,617,309
Securities borrowed
Gross amounts of recognized assets	1,837,001	1,621,405
Gross amounts offset on the Condensed Consolidated Balance Sheets	0	0
Net amounts of assets included on the Condensed Consolidated Balance Sheets	1,837,001	1,621,405
Total
Gross amounts of recognized assets	55,046,701	42,859,136
Gross amounts offset on the Condensed Consolidated Balance Sheets	(45,580,894)	(32,620,422)
Net amounts of assets included on the Condensed Consolidated Balance Sheets	9,465,807	10,238,714
Securities sold under agreements to repurchase
Gross amounts of recognized liabilities	61,745,328	48,911,183
Gross amounts offset on the Condensed Consolidated Balance Sheets	(45,580,894)	(32,620,422)
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets	16,164,434	16,290,761
Securities lending
Gross amounts of recognized liabilities	17	25
Gross amounts offset on the Condensed Consolidated Balance Sheets	0	0
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets	17	25
Total
Total	61,745,345	48,911,208
Gross amounts offset on the Condensed Consolidated Balance Sheets	(45,580,894)	(32,620,422)
Net amounts of liabilities included on the Condensed Consolidated Balance Sheets	$ 16,164,451	$ 16,290,786

SECURITIES FINANCING ACTIVITI_6

SECURITIES FINANCING ACTIVITIES - Gross Amounts of Liabilities Associated with Repurchase Agreements and Securities Lending Agreements by Remaining Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	$ 61,745,328	$ 48,911,183
Securities lending	17
Total	61,745,345
Open and overnight
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	28,748,667
Securities lending	17
Total	28,748,684
Up to 30 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	10,211,955
Securities lending	0
Total	10,211,955
31-90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	13,625,513
Securities lending	0
Total	13,625,513
Greater than 90 days
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	9,159,193
Securities lending	0
Total	$ 9,159,193

SECURITIES FINANCING ACTIVITI_7

SECURITIES FINANCING ACTIVITIES - Gross Amounts of Liabilities Associated with Repurchase Agreements and Securities Lending Agreements by Class of Underlying Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	$ 61,745,328	$ 48,911,183
Securities lending	17	25
Total	61,745,345	48,911,208
U.S. Treasury
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	35,424,614	29,251,978
Securities lending	0	0
Total	35,424,614	29,251,978
Residential agency MBS
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	24,267,322	17,532,972
Securities lending	0	0
Total	24,267,322	17,532,972
Corporate and other securities
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements	2,053,392	2,126,233
Securities lending	17	25
Total	$ 2,053,409	$ 2,126,258

DERIVATIVES - Narrative (Detail

DERIVATIVES - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative [Line Items]
Fair value of derivatives with credit risk contingent feature associated with credit ratings	$ 100,000
Additional collateral required	0
Fair value of derivatives with credit risk contingent features	11,000,000		$ 11,100,000
Collateral posted	11,500,000		15,300,000
Fair Value	7,091,513,000		$ 7,039,537,000
Cash flow hedge gain (loss) to be reclassified within 12 months	(83,700,000)
Net unrealized gains/(losses) on cash flow hedge derivative financial instruments
Derivative [Line Items]
Net amount of change recognized in OCI for cash flow hedge derivatives, gains (losses)	51,300,000	$ 85,870,000
Reclassification of OCI to Retained earnings from the sale of SBC	0	$ 3,099,000
Portion of Closed Portfolio
Derivative [Line Items]
Fair Value	$ 2,800,000,000

DERIVATIVES - Carrying Amount a

DERIVATIVES - Carrying Amount and Fair Value Hedge Adjustment (Details) - Debt securities AFS (Note 2) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Carrying Amount of Hedged Assets	$ 2,243,603	$ 2,463,991
Amount of Fair Value Hedge Adjustment Included in the Carrying Amount	$ 81,397	$ 36,009

DERIVATIVES - Derivatives Desig

DERIVATIVES - Derivatives Designated in Hedge Relationships (Details) - Designated as hedging instrument - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Amount	$ 23,148,116	$ 22,266,466
Asset, Total	132,102	75,414
Liability, Total	$ 336,224	$ 372,089
Weighted Average Receive Rate	2.49%	2.41%
Weighted Average Pay Rate	2.78%	2.51%
Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	1 year 11 months 15 days	1 year 11 months 26 days
Fair value hedges | Cross-currency swaps
Derivative [Line Items]
Notional Amount	$ 18,766	$ 18,766
Asset, Cash flow hedges	170	192
Liability, Cash flow hedges	$ 2,475	$ 2,235
Weighted Average Receive Rate	5.91%	5.91%
Weighted Average Pay Rate	9.90%	9.90%
Fair value hedges | Cross-currency swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	3 years 6 months 29 days	3 years 9 months 29 days
Fair value hedges | Interest rate swaps
Derivative [Line Items]
Notional Amount	$ 6,475,000	$ 6,650,000
Asset, Cash flow hedges	66,761	38,712
Liability, Cash flow hedges	$ 0	$ 7,716
Weighted Average Receive Rate	2.75%	2.02%
Weighted Average Pay Rate	3.48%	3.46%
Fair value hedges | Interest rate swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	2 years 9 months 7 days	3 years 3 days
Cash flow hedges | Pay fixed - receive variable interest rate swaps
Derivative [Line Items]
Notional Amount	$ 5,559,350	$ 3,422,700
Asset, Cash flow hedges	60,926	22,935
Liability, Cash flow hedges	$ 0	$ 120
Weighted Average Receive Rate	3.24%	5.38%
Weighted Average Pay Rate	3.81%	3.82%
Cash flow hedges | Pay fixed - receive variable interest rate swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	2 years 6 months 7 days	2 years 6 months 10 days
Cash flow hedges | Pay variable - receive fixed interest rate swaps
Derivative [Line Items]
Notional Amount	$ 11,075,000	$ 11,925,000
Asset, Cash flow hedges	4,245	13,575
Liability, Cash flow hedges	$ 333,523	$ 362,018
Weighted Average Receive Rate	1.96%	1.83%
Weighted Average Pay Rate	1.84%	1.64%
Cash flow hedges | Pay variable - receive fixed interest rate swaps | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	1 year 2 months 15 days	1 year 3 months 18 days
Cash flow hedges | Foreign exchange
Derivative [Line Items]
Notional Amount	$ 20,000
Asset, Cash flow hedges	0
Liability, Cash flow hedges	$ 226
Weighted Average Receive Rate	0%
Weighted Average Pay Rate	0%
Cash flow hedges | Foreign exchange | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)	29 days
Cash flow hedges | Interest rate floors
Derivative [Line Items]
Notional Amount		$ 250,000
Asset, Cash flow hedges		0
Liability, Cash flow hedges		$ 0
Weighted Average Receive Rate		0%
Weighted Average Pay Rate		0%
Cash flow hedges | Interest rate floors | Weighted Average
Derivative [Line Items]
Weighted Average Life (Years)		14 days

DERIVATIVES - Derivatives Not D

DERIVATIVES - Derivatives Not Designated in Hedge Relationships (Details) - Not designated as hedging instrument - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	$ 107,104,740	$ 106,467,054
Asset derivatives Fair value	1,060,412	1,016,844
Liability derivatives Fair value	1,078,768	1,102,608
Mortgage banking derivatives
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	662,000	662,000
Asset derivatives Fair value	16,454	14,634
Liability derivatives Fair value	35,429	31,304
Customer-related derivatives
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	37,858,912	38,715,479
Asset derivatives Fair value	874,210	828,812
Liability derivatives Fair value	854,090	805,473
Customer-related derivatives | Swaps receive fixed
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	14,931,634	15,017,998
Asset derivatives Fair value	2,903	26,731
Liability derivatives Fair value	793,390	687,505
Customer-related derivatives | Swaps pay fixed
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	14,984,936	15,005,503
Asset derivatives Fair value	812,882	708,642
Liability derivatives Fair value	3,876	26,366
Customer-related derivatives | Other
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	7,942,342	8,691,978
Asset derivatives Fair value	58,425	93,439
Liability derivatives Fair value	56,824	91,602
Other Derivative Activities | Other
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	54,709,920	48,543,537
Asset derivatives Fair value	51,216	42,657
Liability derivatives Fair value	71,136	126,968
Other Derivative Activities | Foreign exchange contracts
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	10,244,954	11,518,594
Asset derivatives Fair value	50,793	54,722
Liability derivatives Fair value	50,381	62,842
Other Derivative Activities | Interest rate swap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	100	2,400,100
Asset derivatives Fair value	7	0
Liability derivatives Fair value	0	2
Other Derivative Activities | Interest rate cap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	1,814,427	2,313,672
Asset derivatives Fair value	67,732	76,019
Liability derivatives Fair value	0	0
Other Derivative Activities | Options for interest rate cap agreements
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Notional	1,814,427	2,313,672
Asset derivatives Fair value	0	0
Liability derivatives Fair value	$ 67,732	$ 76,019

DERIVATIVES - Gains (Losses) on

DERIVATIVES - Gains (Losses) on All Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cross-currency swaps | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	$ (190)	$ (830)
Interest rate swaps | Fair value hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	12,888	5,400
Pay fixed-receive variable interest rate swaps | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	12,926	(3,468)
Pay variable receive-fixed interest rate swap | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	(95,381)	(101,917)
Interest rate floors | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	(46)	(436)
Mortgage banking derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	(4,210)	2,383
Customer-related derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	10,377	17,057
Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	(6,306)	(10,281)
Interest rate swaps, caps, and options
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	24,522	(694)
Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized on derivatives	$ 25,348	$ (57,558)

DERIVATIVES - Offsetting of Fin

DERIVATIVES - Offsetting of Financial Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Offsetting Assets [Line Items]
Gross Amounts Offset in the Condensed Consolidated Balance Sheets, Total Derivative Assets	$ (32,183)	$ (2,064)
Derivate asset, statement of financial position, extensible enumeration not disclosed flag	Total Derivative Assets	Total Derivative Assets
Gross Amounts of Recognized Assets, Total Derivative Assets	$ 1,192,514	$ 1,092,258
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet, Total Derivative Assets	1,160,331	1,090,194
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Received, Total Derivative Assets	(384,448)	(205,070)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets - Net Amount, Total Derivative Assets	775,883	885,124
Other derivative activities
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	1,060,412	1,016,844
Gross Amounts Offset in the Condensed Consolidated Balance Sheets, Total Derivative Assets	(32,183)	(2,064)
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	1,028,229	1,014,780
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Received, Total Derivative Assets	(290,159)	(170,835)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	738,070	843,945
Fair value hedges
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	66,931	38,904
Gross Amounts Offset in the Condensed Consolidated Balance Sheets, Total Derivative Assets	0	0
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	66,931	38,904
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Received, Total Derivative Assets	(32,121)	(11,300)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	34,810	27,604
Cash flow hedges
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Total derivatives subject to a master netting arrangement or similar arrangement	65,171	36,510
Gross Amounts Offset in the Condensed Consolidated Balance Sheets, Total Derivative Assets	0	0
Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	65,171	36,510
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Received, Total Derivative Assets	(62,168)	(22,935)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	$ 3,003	$ 13,575

DERIVATIVES - Offsetting of F_2

DERIVATIVES - Offsetting of Financial Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Offsetting Liabilities [Line Items]
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	$ (32,133)	$ (2,014)
Derivate liability, statement of financial position, extensible enumeration not disclosed flag	Total Derivative Liabilities	Total Derivative Liabilities
Gross Amounts of Recognized Liabilities, Total Derivative Liabilities	$ 1,414,992	$ 1,474,697
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets, Total Derivative Liabilities	1,382,859	1,472,683
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged, Total Derivative Liabilities	(234,863)	(271,754)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total Derivatives Liabilities	1,147,996	1,200,929
Other derivative activities
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	1,078,768	1,102,608
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	(32,133)	(2,014)
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	1,046,635	1,100,594
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(94,057)	(129,722)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	952,578	970,872
Fair value hedges
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	2,475	9,951
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	2,475	9,951
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(1,171)	(1,064)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	1,304	8,887
Cash flow hedges
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities, Total derivatives subject to a master netting arrangement or similar arrangement	333,749	362,138
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheets, Total derivatives subject to a master netting arrangement or similar arrangement	333,749	362,138
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Collateral Pledged	(139,635)	(140,968)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Net Amount, Total derivatives subject to a master netting arrangement or similar arrangement	$ 194,114	$ 221,170

FAIR VALUE - Narrative (Details

FAIR VALUE - Narrative (Details) $ in Billions	3 Months Ended
	Mar. 31, 2024 USD ($)
Beneficial interest in Structured LLC
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfer from Level 2 to Level 3	$ 1.1

FAIR VALUE - Fair Value Measure

FAIR VALUE - Fair Value Measurements, Recurring (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Investments in debt securities AFS	$ 7,091,513	$ 7,039,537
Trading securities	9,003,612	7,967,875
Federal funds sold and securities purchased under resale agreements or similar arrangements	604,292	2,112,292
RICs HFI	12,500	13,900
LHFS	535,400	19,500
Other assets - derivatives	1,160,331	1,090,194
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements	362,103	595,414
Trading liabilities	2,960,617	2,699,500
Other liabilities - derivatives	1,382,859	1,472,683
U.S. Treasury securities
Financial assets:
Investments in debt securities AFS	226,359	25,409
Corporate debt
Financial assets:
Investments in debt securities AFS	2,130	31,590
ABS
Financial assets:
Investments in debt securities AFS	549,739	510,663
Beneficial interest in Structured LLC
Financial assets:
Investments in debt securities AFS	1,082,348	1,122,510
Recurring
Financial assets:
Investments in debt securities AFS	7,091,514	7,039,537
Trading securities	9,003,612	7,967,875
Federal funds sold and securities purchased under resale agreements or similar arrangements	604,292	2,112,292
RICs HFI	12,494	13,888
LHFS	535,373	19,464
MSRs	95,776	94,266
Other assets - derivatives	1,160,331	1,090,194
Total financial assets	18,503,392	18,337,516
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements	362,103	595,414
Trading liabilities	2,960,617	2,699,500
Other liabilities - derivatives	1,382,859	1,472,683
Total financial liabilities	4,705,579	4,767,597
Recurring | U.S. Treasury securities
Financial assets:
Investments in debt securities AFS	226,359	25,409
Recurring | Corporate debt
Financial assets:
Investments in debt securities AFS	2,130	31,590
Recurring | ABS
Financial assets:
Investments in debt securities AFS	549,739	510,663
Recurring | Beneficial interest in Structured LLC
Financial assets:
Beneficial interest in Structured LLC	1,082,349	1,122,510
Recurring | MBS
Financial assets:
Investments in debt securities AFS	5,230,937	5,349,365
Recurring | Level 1
Financial assets:
Investments in debt securities AFS	226,359	25,409
Trading securities	1,593,249	1,637,908
Federal funds sold and securities purchased under resale agreements or similar arrangements	0	0
RICs HFI	0	0
LHFS	0	0
MSRs	0	0
Other assets - derivatives	586	4,807
Total financial assets	1,820,194	1,668,124
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements	0	0
Trading liabilities	2,665,439	2,371,823
Other liabilities - derivatives	134	5,914
Total financial liabilities	2,665,573	2,377,737
Recurring | Level 1 | U.S. Treasury securities
Financial assets:
Investments in debt securities AFS	226,359	25,409
Recurring | Level 1 | Corporate debt
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 1 | ABS
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 1 | Beneficial interest in Structured LLC
Financial assets:
Beneficial interest in Structured LLC	0	0
Recurring | Level 1 | MBS
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 2
Financial assets:
Investments in debt securities AFS	5,782,806	7,014,128
Trading securities	7,404,215	6,329,031
Federal funds sold and securities purchased under resale agreements or similar arrangements	604,292	2,112,292
RICs HFI	0	0
LHFS	535,373	19,464
MSRs	0	0
Other assets - derivatives	1,159,713	1,085,333
Total financial assets	15,486,399	16,560,248
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements	362,103	595,414
Trading liabilities	295,178	327,293
Other liabilities - derivatives	1,382,360	1,466,119
Total financial liabilities	2,039,641	2,388,826
Recurring | Level 2 | U.S. Treasury securities
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 2 | Corporate debt
Financial assets:
Investments in debt securities AFS	2,130	31,590
Recurring | Level 2 | ABS
Financial assets:
Investments in debt securities AFS	549,739	510,663
Recurring | Level 2 | Beneficial interest in Structured LLC
Financial assets:
Beneficial interest in Structured LLC	0	1,122,510
Recurring | Level 2 | MBS
Financial assets:
Investments in debt securities AFS	5,230,937	5,349,365
Recurring | Level 3
Financial assets:
Investments in debt securities AFS	1,082,349	0
Trading securities	6,148	936
Federal funds sold and securities purchased under resale agreements or similar arrangements	0	0
RICs HFI	12,494	13,888
LHFS	0	0
MSRs	95,776	94,266
Other assets - derivatives	32	54
Total financial assets	1,196,799	109,144
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements	0	0
Trading liabilities	0	384
Other liabilities - derivatives	365	650
Total financial liabilities	$ 365	1,034
Percentage of level 3 assets to total assets held at fair value	6.50%
Percentage of level 3 assets to total assets	0.70%
Recurring | Level 3 | U.S. Treasury securities
Financial assets:
Investments in debt securities AFS	$ 0	0
Recurring | Level 3 | Corporate debt
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 3 | ABS
Financial assets:
Investments in debt securities AFS	0	0
Recurring | Level 3 | Beneficial interest in Structured LLC
Financial assets:
Beneficial interest in Structured LLC	1,082,349	0
Recurring | Level 3 | MBS
Financial assets:
Investments in debt securities AFS	$ 0	$ 0

FAIR VALUE - Sensitivity Analys

FAIR VALUE - Sensitivity Analysis of Fair Value, Mortgage Servicing Rights (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
MSRs
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Sensitivity analysis of fair value, impact of 10 percent adverse change in prepayment speed, increase (decrease)	$ (2.8)
Sensitivity analysis of fair value, impact of 20 percent adverse change in prepayment speed, increase (decrease)	(5.4)
Sensitivity analysis of fair value, impact of 10 percent adverse change in discount rate, increase (decrease)	(3.6)
Sensitivity analysis of fair value, impact of 20 percent adverse change in discount rate, increase (decrease)	(7)
Residential mortgages
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Principal balance of loans serviced for others	$ 8,100	$ 8,300

FAIR VALUE - Reconciliation of

FAIR VALUE - Reconciliation of Assets and Liabilities Using Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Fair value recurring basis, unobservable input reconciliation, net derivative asset (liability) gain (loss), statement of income extensible list not disclosed flag	Gains/(losses) in earnings	Gains/(losses) in earnings
Fair value, recurring basis, unobservable input reconciliation, asset, gain (loss), statement of income, extensible list not disclosed flag	Gains/(losses) in earnings	Gains/(losses) in earnings
Fair value asset recurring basis, still held unrealized gain (loss), statement of income, extensible list not disclosed flag	Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	Changes in unrealized gains (losses) included in earnings related to balances still held at end of period
Level 3 | Recurring
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	$ 108,110	$ 126,236
Gain / (losses) in OCI	(23,469)	0
Gains/(losses) in earnings	4,102	(2,710)
Additions/Issuances	465	0
Transfer from Level 2	1,128,086	2,219
Settlements	(20,860)	(4,634)
Balances, end of period	1,196,434	121,111
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	4,102	(2,710)
Level 3 | Recurring | Beneficial interest in Structured LLC
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	0
Gain / (losses) in OCI	(23,469)
Gains/(losses) in earnings	0
Additions/Issuances	0
Transfer from Level 2	1,122,510
Settlements	(16,692)
Balances, end of period	1,082,349
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	0
Level 3 | Recurring | RICs HFI
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	13,888	20,924
Gain / (losses) in OCI	0	0
Gains/(losses) in earnings	0	0
Additions/Issuances	0	0
Transfer from Level 2	0	0
Settlements	(1,394)	(2,100)
Balances, end of period	12,494	18,824
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	0	0
Level 3 | Recurring | MSRs
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	94,266	107,383
Gain / (losses) in OCI	0	0
Gains/(losses) in earnings	3,848	(2,539)
Additions/Issuances	0	0
Transfer from Level 2	0	0
Settlements	(2,338)	(2,534)
Balances, end of period	95,776	102,310
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	3,848	(2,539)
Level 3 | Recurring | Derivatives, net
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	(596)	(2,210)
Gain / (losses) in OCI	0	0
Gains/(losses) in earnings	263	(169)
Additions/Issuances	0	0
Transfer from Level 2	0	0
Settlements	0	0
Balances, end of period	(333)	(2,379)
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	263	(169)
Level 3 | Recurring | Other
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balances, beginning of period	552	139
Gain / (losses) in OCI	0	0
Gains/(losses) in earnings	(9)	(2)
Additions/Issuances	465	0
Transfer from Level 2	5,576	2,219
Settlements	(436)	0
Balances, end of period	6,148	2,356
Fair Value, Assets, Unobservable Input Reconciliation [Roll Forward]
Changes in unrealized gains (losses) included in earnings related to balances still held at end of period	$ (9)	$ (2)

FAIR VALUE - Fair Value Measu_2

FAIR VALUE - Fair Value Measurements, Non-recurring (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	$ 12,500	$ 13,900
LHFS	535,400	19,500
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	20,922	24,588
Vehicle inventory	356,793	311,321
LHFS	60,978	140,655
Nonrecurring | Impaired commercial LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	234,144	271,875
Nonrecurring | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	139,709	154,684
Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	0	0
Vehicle inventory	0	0
LHFS	0	0
Nonrecurring | Level 1 | Impaired commercial LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	0	0
Nonrecurring | Level 1 | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	0	0
Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	20,922	24,588
Vehicle inventory	356,793	311,321
LHFS	0	0
Nonrecurring | Level 2 | Impaired commercial LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	137,370	230,443
Nonrecurring | Level 2 | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	139,709	154,684
Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreclosed assets	0	0
Vehicle inventory	0	0
LHFS	60,978	140,655
Nonrecurring | Level 3 | Impaired commercial LHFI
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	96,774	41,432
Nonrecurring | Level 3 | Auto loans impaired due to bankruptcy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired commercial LHFI	$ 0	$ 0

FAIR VALUE - Valuation Processe

FAIR VALUE - Valuation Processes and Techniques - Nonrecurring Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
LHFS	$ 535,400	$ 19,500
Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
LHFS	$ 60,978	$ 140,655

FAIR VALUE - Fair Value Adjustm

FAIR VALUE - Fair Value Adjustments (Details) - Nonrecurring - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Impaired LHFI | Credit loss expense/benefit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	$ (3,505)	$ (3,250)
Foreclosed assets | Miscellaneous Income, Net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	(3,964)	(8)
LHFS | Miscellaneous Income, Net
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	0	(3,769)
Auto loans impaired due to bankruptcy | Credit loss expense/benefit
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value adjustment	$ 11,957	$ (3,371)

FAIR VALUE - Quantitative Infor

FAIR VALUE - Quantitative Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial Assets:	$ 95,776	$ 94,266
Level 3 | Beneficial interest in Structured LLC
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial Assets:	$ 1,082,349
Level 3 | Beneficial interest in Structured LLC | Discount rate | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	0.1150
Level 3 | Beneficial interest in Structured LLC | Loss severity rate | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	0
Level 3 | Beneficial interest in Structured LLC | Loss severity rate | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	1
Level 3 | Beneficial interest in Structured LLC | Extension of Loan | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Extension of Loan	0 years
Level 3 | Beneficial interest in Structured LLC | Extension of Loan | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Extension of Loan	60 months
Level 3 | Mortgage servicing
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial Assets:	$ 95,776	$ 94,266
Level 3 | Mortgage servicing | Discount rate
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	0.0981	0.0981
Level 3 | Mortgage servicing | CPR | Weighted Average
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	0.0748	0.0753
Level 3 | Mortgage servicing | CPR | Minimum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	0	0
Level 3 | Mortgage servicing | CPR | Maximum
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Unobservable inputs (as a percent)	1	1

FAIR VALUE - Fair Value of Fina

FAIR VALUE - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Federal funds sold and securities purchased under resale agreements or similar arrangements		$ 604,292	$ 2,112,292
Investments in debt securities AFS		7,091,513	7,039,537
Investments in debt securities HTM		7,410,927	7,562,523
Trading securities and other investments		9,003,612	7,967,875
LHFI, net		84,937,664	86,115,156
LHFS	[1]	596,351	160,118
Derivatives		1,160,331	1,090,194
Financial liabilities:
Federal funds purchased and securities loaned or sold under repurchase agreements		362,103	595,414
Trading liabilities		2,960,617	2,699,500
Derivatives		1,382,859	1,472,683
Gross amounts offset on the Condensed Consolidated Balance Sheets		45,580,894	32,620,422
Carrying Value
Financial assets:
Cash and cash equivalents		14,413,097	13,118,428
Federal funds sold and securities purchased under resale agreements or similar arrangements		9,465,807	10,238,714
Investments in debt securities AFS		7,091,513	7,039,537
Investments in debt securities HTM		8,969,064	9,039,704
Trading securities and other investments		9,003,612	7,967,875
LHFI, net		84,937,664	86,115,156
LHFS		596,351	160,118
Restricted cash		5,365,963	5,549,701
MSRs		95,776	94,266
Derivatives		1,160,331	1,090,194
Financial liabilities:
Deposits		20,763,160	19,947,868
Federal funds purchased and securities loaned or sold under repurchase agreements		16,164,451	16,290,786
Trading liabilities		2,960,617	2,699,500
Borrowings and other debt obligations		43,911,347	44,144,051
Derivatives		1,382,859	1,472,683
Fair Value
Financial assets:
Cash and cash equivalents		14,413,097	13,118,428
Federal funds sold and securities purchased under resale agreements or similar arrangements		9,463,021	10,234,487
Investments in debt securities AFS		7,091,514	7,039,537
Investments in debt securities HTM		7,410,927	7,562,523
Trading securities and other investments		9,003,612	7,967,874
LHFI, net		86,999,045	89,544,115
LHFS		596,351	160,119
Restricted cash		5,365,963	5,549,701
MSRs		95,776	94,266
Derivatives		1,160,331	1,090,194
Financial liabilities:
Deposits		20,834,335	20,040,000
Federal funds purchased and securities loaned or sold under repurchase agreements		16,168,676	16,289,980
Trading liabilities		2,960,617	2,699,500
Borrowings and other debt obligations		43,952,206	44,107,856
Derivatives		1,382,859	1,472,683
Fair Value | Level 1
Financial assets:
Cash and cash equivalents		14,413,097	13,118,428
Federal funds sold and securities purchased under resale agreements or similar arrangements		0	0
Investments in debt securities AFS		226,359	25,409
Investments in debt securities HTM		0	0
Trading securities and other investments		1,593,249	1,637,908
LHFI, net		0	0
LHFS		0	0
Restricted cash		5,365,963	5,549,701
MSRs		0	0
Derivatives		586	4,807
Financial liabilities:
Deposits		0	0
Federal funds purchased and securities loaned or sold under repurchase agreements		0	0
Trading liabilities		2,665,439	2,371,823
Borrowings and other debt obligations		0	0
Derivatives		134	5,914
Fair Value | Level 2
Financial assets:
Cash and cash equivalents		0	0
Federal funds sold and securities purchased under resale agreements or similar arrangements		9,463,021	10,234,487
Investments in debt securities AFS		5,782,806	7,014,128
Investments in debt securities HTM		7,410,927	7,562,523
Trading securities and other investments		7,404,215	6,329,030
LHFI, net		137,370	230,443
LHFS		535,373	19,464
Restricted cash		0	0
MSRs		0	0
Derivatives		1,159,713	1,085,333
Financial liabilities:
Deposits		20,834,335	20,040,000
Federal funds purchased and securities loaned or sold under repurchase agreements		16,168,676	16,289,980
Trading liabilities		295,178	327,293
Borrowings and other debt obligations		37,642,851	36,998,432
Derivatives		1,382,360	1,466,119
Fair Value | Level 3
Financial assets:
Cash and cash equivalents		0	0
Federal funds sold and securities purchased under resale agreements or similar arrangements		0	0
Investments in debt securities AFS		1,082,349	0
Investments in debt securities HTM		0	0
Trading securities and other investments		6,148	936
LHFI, net		86,861,675	89,313,672
LHFS		60,978	140,655
Restricted cash		0	0
MSRs		95,776	94,266
Derivatives		32	54
Financial liabilities:
Deposits		0	0
Federal funds purchased and securities loaned or sold under repurchase agreements		0	0
Trading liabilities		0	384
Borrowings and other debt obligations		6,309,355	7,109,424
Derivatives		$ 365	$ 650
[1]Includes $535.4 million and $19.5 million of loans recorded at the FVO at March 31, 2024 and December 31, 2023, respectively.

FAIR VALUE - Valuation Proces_2

FAIR VALUE - Valuation Processes and Techniques - Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Gross amounts offset on the Condensed Consolidated Balance Sheets	$ 45,580,894	$ 32,620,422
Level 2 | Fair Value
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value of underlying collateral	$ 61,900,000

FAIR VALUE - Fair Value Option

FAIR VALUE - Fair Value Option for Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Nonaccrual loans	$ 95	$ 74
Federal funds sold and securities purchased under resale agreements or similar arrangements	604,292	2,112,292
Federal funds purchased and securities loaned or sold under repurchase agreements	362,103	595,414
Principal Balance
Nonaccrual loans	95	74
Federal funds sold and securities purchased under resale agreements or similar arrangements	603,837	2,111,293
Federal funds sold and securities purchased under resale agreements or similar arrangements	362,020	595,142
Difference
Nonaccrual loans	0	0
Federal funds sold and securities purchased under resale agreements or similar arrangements	455	999
Federal funds sold and securities purchased under resale agreements or similar arrangements	83	272
LHFS	535,400	19,500
Nonrecurring
Difference
LHFS	60,978	140,655
LHFS
Fair Value
LHFS	535,373	19,464
Principal Balance
LHFS	533,682	19,389
Difference
LHFS	1,691	75
RICs HFI
Fair Value
RICs HFI	12,494	13,888
Principal Balance
RICs HFI	12,494	13,888
Difference
RICs HFI	$ 0	$ 0

NON-INTEREST INCOME AND OTHER_3

NON-INTEREST INCOME AND OTHER EXPENSES - Schedule of Non-Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Consumer and commercial fees	$ 84,217	$ 90,329
Lease income	593,447	628,424
Capital market revenue	115,970	37,082
Miscellaneous income, net
Mortgage banking income, net	13,750	4,184
BOLI	18,194	15,570
Net gain on sale of operating leases	22,759	22,383
Asset and wealth management fees	80,603	61,133
(Loss) / gain on non-mortgage loans	(740)	(4,701)
Other miscellaneous income, net	(55,635)	8,903
Net gain / (loss) on sale of investment securities	65,166	36,960
TOTAL NON-INTEREST INCOME	$ 937,731	$ 900,267

NON-INTEREST INCOME AND OTHER_4

NON-INTEREST INCOME AND OTHER EXPENSES - Disaggregation by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Lease income	$ 593,447	$ 628,424
Other miscellaneous income, net	(6,496)	16,397
Net gain / (loss) on sale of investment securities	65,166	36,960
Total out-of-scope of revenue from contracts with customers	687,069	723,407
TOTAL NON-INTEREST INCOME	937,731	900,267
Total in-scope of revenue from contracts with customers
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	250,662	176,860
Depository services
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	31,048	31,695
Commission and trailer fees
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	77,063	57,626
Interchange income, net
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	19,116	17,525
Underwriting service fees
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	73,492	27,961
Asset and wealth management fees
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	47,821	30,105
Other revenue from contracts with customers
Disaggregation of Revenue [Line Items]
In-scope of revenue from contracts with customers	2,122	11,948
Consumer and commercial fees
Disaggregation of Revenue [Line Items]
Consumer and commercial fees	$ 34,952	$ 41,626

NON-INTEREST INCOME AND OTHER_5

NON-INTEREST INCOME AND OTHER EXPENSES - Schedule of Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Amortization of intangibles	$ 9,581	$ 10,446
Deposit insurance premiums and other expenses	16,604	18,757
Other administrative expenses	94,975	86,578
Other miscellaneous expenses	17,385	5,198
Total Other expenses	$ 138,545	$ 120,979

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income tax provision	$ 7,754	$ 28,205
Effective income tax rate reconciliation (as a percent)	2.20%	8.70%
Deferred tax assets, net	$ 195,700		$ 150,100
Deferred tax assets, gross	235,000		234,300
Deferred tax liabilities, gross	39,300		$ 84,200
Increase (decrease) in deferred tax asset, net	$ 45,600

COMMITMENTS, CONTINGENCIES, A_3

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Other Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Total commitments	$ 25,949,667	$ 26,426,918
Commitments to extend credit
Other Commitments [Line Items]
Other commitments	24,846,809	25,239,691
Letters of credit
Other Commitments [Line Items]
Letters of credit	1,084,701	1,168,681
Recourse exposure on sold loans
Other Commitments [Line Items]
Other commitments	$ 18,157	$ 18,546

COMMITMENTS, CONTINGENCIES, A_4

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Commitments to Extend Credit (Details) - USD ($) $ in Billions	Mar. 31, 2024	Dec. 31, 2023
Commitments to extend credit
Other Commitments [Line Items]
Commitments that can be canceled without notice	$ 3.3	$ 3.1

COMMITMENTS, CONTINGENCIES, A_5

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Letters of Credit (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Lines of credit outstanding	$ 57,200	$ 60,800
Letters of credit
Other Commitments [Line Items]
Commitments, weighted average term (in months)	11 months 3 days
Letters of credit	$ 1,084,701	$ 1,168,681

COMMITMENTS, CONTINGENCIES, A_6

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - RIC Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
RIC Consumer | Chrysler | Revenue-sharing and gain/(loss), net-sharing payments
Long-term Purchase Commitment [Line Items]
Commitments	$ 11,129	$ 10,302

COMMITMENTS, CONTINGENCIES, A_7

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - MPLFA (Details) - SC - Chrysler $ in Billions	May 01, 2023 USD ($)
Other Commitments [Line Items]
Financing dedicated to FCA retail financing	$ 2.5
Minimum
Other Commitments [Line Items]
Funding available for dealer inventory financing	$ 2.5

COMMITMENTS, CONTINGENCIES, A_8

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Agreements (Details) - SC - USD ($)	1 Months Ended
	Nov. 30, 2015	Mar. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Minimum sales commitment, charged off loan receivables	$ 350,000,000
Threshold for sales subject to market price check (over)	$ 275,000,000
Minimum sales commitment, loans receivable, written off, remaining		$ 0	$ 0

COMMITMENTS, CONTINGENCIES, A_9

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Legal and Regulatory Proceedings (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Accrued legal and regulatory liabilities	$ 12.6	$ 12.4
Maximum
Loss Contingencies [Line Items]
Estimate of possible loss	$ 13.3	$ 14.6

COMMITMENTS, CONTINGENCIES, _10

COMMITMENTS, CONTINGENCIES, AND GUARANTEES - Customer Lending Cases (Details) - Enterprise Financial Group - SC - USD ($) $ in Millions			3 Months Ended
	May 09, 2023	Nov. 02, 2022	Mar. 31, 2024
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 10.5
Litigation settlement, amount awarded to other party	$ 10.6	$ 5
Litigation settlement, amount awarded from other party	$ 4.2	$ 4.2

RELATED PARTY TRANSACTIONS - De

RELATED PARTY TRANSACTIONS - Debt and derivative activities (Details) - Fixed Rate Loan Agreement - Related Party - SBNA	Oct. 05, 2023 USD ($)
Related Party Transaction [Line Items]
Debt issued	$ 2,000,000,000
Stated interest rate	6.98%

RELATED PARTY TRANSACTIONS - Me

RELATED PARTY TRANSACTIONS - Mezzanine and Stockholder's Equity (Details) - USD ($) $ in Thousands				3 Months Ended
	Dec. 19, 2023	Jun. 15, 2023	Dec. 21, 2022	Mar. 31, 2024	Mar. 31, 2023
Related Party Transaction [Line Items]
Dividend accrual, percentage	8.17%	9.38%	8.41%
Dividend accrual, variable rate for each dividend re-set period	4.36%	5.467%	4.74%
Dividends paid on common stock				$ 0	$ 250,000
Dividends paid on preferred stock				$ 44,402	$ 10,513
Series E
Related Party Transaction [Line Items]
Temporary equity, issued (in shares)			500,000
Series F
Related Party Transaction [Line Items]
Temporary equity, issued (in shares)		1,000,000
Series G
Related Party Transaction [Line Items]
Temporary equity, issued (in shares)	500,000

RELATED PARTY TRANSACTIONS - _2

RELATED PARTY TRANSACTIONS - Deposits and Checking Accounts (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Deposits	$ 77,684,470	$ 77,073,176
Affiliates
Related Party Transaction [Line Items]
Deposits	$ 179,000	$ 141,800

RELATED PARTY TRANSACTIONS - Re

RELATED PARTY TRANSACTIONS - Repurchase Agreements and Securities Trading (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Repurchase agreements
Related Party Transaction [Line Items]
Amount of related party transactions	$ 45
Securities Trading
Related Party Transaction [Line Items]
Amount of related party transactions	$ 105

BUSINESS SEGMENT INFORMATION -

BUSINESS SEGMENT INFORMATION - Narrative (Details) $ in Millions	Mar. 31, 2024 USD ($)
CIB
Segment Reporting Information [Line Items]
Minimum annual revenue to service corporations	$ 500

BUSINESS SEGMENT INFORMATION _2

BUSINESS SEGMENT INFORMATION - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net interest income / (expense)	$ 1,377,509	$ 1,510,394
Non-interest income	937,731	900,267
Credit loss expense / (benefit)	404,998	542,401
Total expenses	1,559,281	1,543,174
Income/(loss) before income taxes	350,961	325,086
Total assets	165,765,740	177,557,843	$ 164,972,575
Reportable Segments | Auto
Segment Reporting Information [Line Items]
Net interest income / (expense)	885,622	920,272
Non-interest income	571,158	650,683
Credit loss expense / (benefit)	379,652	417,766
Total expenses	807,303	824,726
Income/(loss) before income taxes	269,825	328,463
Total assets	61,259,798	62,163,190
Reportable Segments | CBB
Segment Reporting Information [Line Items]
Net interest income / (expense)	377,814	400,246
Non-interest income	61,348	65,974
Credit loss expense / (benefit)	52,034	109,095
Total expenses	353,005	368,348
Income/(loss) before income taxes	34,123	(11,223)
Total assets	11,747,388	13,174,180
Reportable Segments | C&I
Segment Reporting Information [Line Items]
Net interest income / (expense)	86,401	82,942
Non-interest income	14,070	10,929
Credit loss expense / (benefit)	(21,395)	2,094
Total expenses	52,986	59,023
Income/(loss) before income taxes	68,880	32,754
Total assets	4,080,901	6,021,239
Reportable Segments | CRE
Segment Reporting Information [Line Items]
Net interest income / (expense)	124,191	105,132
Non-interest income	8,953	4,997
Credit loss expense / (benefit)	8,737	30,383
Total expenses	32,366	31,781
Income/(loss) before income taxes	92,041	47,965
Total assets	23,845,435	21,921,029
Reportable Segments | CIB
Segment Reporting Information [Line Items]
Net interest income / (expense)	26,911	59,789
Non-interest income	164,850	89,735
Credit loss expense / (benefit)	(12,743)	(11,122)
Total expenses	195,479	120,139
Income/(loss) before income taxes	9,025	40,507
Total assets	26,842,241	36,282,779
Reportable Segments | Wealth Management
Segment Reporting Information [Line Items]
Net interest income / (expense)	60,684	70,019
Non-interest income	83,732	57,655
Credit loss expense / (benefit)	0	0
Total expenses	66,870	68,522
Income/(loss) before income taxes	77,546	59,152
Total assets	7,322,916	8,267,535
Reportable Segments | Other
Segment Reporting Information [Line Items]
Net interest income / (expense)	(184,114)	(128,006)
Non-interest income	33,620	20,294
Credit loss expense / (benefit)	(1,287)	(5,815)
Total expenses	51,272	70,635
Income/(loss) before income taxes	(200,479)	(172,532)
Total assets	$ 30,667,061	$ 29,727,891

Uncategorized Items - sov-20240

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2022-02 [Member]