HSBC USA (HUSI+G) 10-K 22 Feb 22 2021 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-07436
Entity Registrant Name	HSBC USA Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	13-2764867
Entity Address, Address Line One	452 Fifth Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10018
City Area Code	212
Local Phone Number	525-5000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float	$ 0
Entity Common Stock, Shares Outstanding		714
ICFR Auditor Attestation Flag	false
Documents Incorporated by Reference	None.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0000083246
$100,000,000 Zero Coupon Callable Accreting Notes due January 15, 2043
Document Information [Line Items]
Title of 12(b) Security	$100,000,000 Zero Coupon Callable Accreting Notes due January 15, 2043
Trading Symbol	HBA/43
Security Exchange Name	NYSE
$50,000,000 Zero Coupon Callable Accreting Notes due January 29, 2043
Document Information [Line Items]
Title of 12(b) Security	$50,000,000 Zero Coupon Callable Accreting Notes due January 29, 2043
Trading Symbol	HBA/43A
Security Exchange Name	NYSE

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2021
Audit Information [Abstract]
Auditor Name	PricewaterhouseCoopers LLP
Auditor Firm ID	238
Auditor Location	New York, New York

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest income:
Loans	$ 1,705	$ 2,202	$ 2,856
Securities	641	897	1,188
Trading securities	225	288	291
Short-term investments	81	143	573
Other	23	42	82
Total interest income	2,675	3,572	4,990
Interest expense:
Deposits	267	755	1,475
Short-term borrowings	18	69	231
Long-term debt	296	558	1,137
Other	11	16	35
Total interest expense	592	1,398	2,878
Net interest income	2,083	2,174	2,112
Provision for credit losses	(570)	810	195
Net interest income after provision for credit losses	2,653	1,364	1,917
Other revenues:
Trading revenue (expense)	24	273	591
Other securities gains, net	73	137	88
Gain (loss) on instruments designated at fair value and related derivatives	35	34	(13)
Other income (loss)	(13)	7	16
Total other revenues	1,237	1,535	1,854
Operating expenses:
Salaries and employee benefits	665	767	822
Support services from HSBC affiliates	1,620	1,551	1,638
Occupancy expense, net	248	281	197
Goodwill impairment	0	784	365
Other expenses	445	498	479
Total operating expenses	2,978	3,881	3,501
Income (loss) before income tax	912	(982)	270
Income tax expense (benefit)	224	(42)	157
Net income (loss)	688	(940)	113
Credit card fees, net
Other revenues:
Other revenues	37	38	67
Trust and investment management fees
Other revenues:
Other revenues	108	132	132
Other fees and commissions
Other revenues:
Other revenues	652	567	619
Servicing and other fees from HSBC affiliates
Other revenues:
Other revenues	$ 321	$ 347	$ 354

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 688	$ (940)	$ 113
Net change in unrealized gains (losses), net of tax:
Investment securities	(815)	864	403
Fair value option liabilities attributable to our own credit spread	12	24	(310)
Derivatives designated as cash flow hedges	(59)	72	8
Pension and post-retirement benefit plans	4	(4)	(14)
Total other comprehensive income (loss)	(858)	956	87
Comprehensive income (loss)	$ (170)	$ 16	$ 200

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash and due from banks	[1]	$ 954	$ 1,302
Interest bearing deposits with banks	[1]	47,400	14,353
Federal funds sold and securities purchased under agreements to resell	[1]	10,514	35,746
Trading assets (includes $1.7 billion and $1.3 billion pledged to creditors at December 31, 2021 and 2020, respectively)	[1]	24,043	27,284
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)	[1]	35,298	40,672
Securities held-to-maturity, net of allowance for credit losses of $1 million and $2 million at December 31, 2021 and 2020, respectively (fair value of $5.4 billion and $9.4 billion at December 31, 2021 and 2020, respectively)	[1]	5,203	8,981
Loans (includes nil and $32 million designated under fair value option at December 31, 2021 and 2020, respectively)	[1]	55,864	62,088
Less – allowance for credit losses	[1]	447	1,015
Loans, net	[1]	55,417	61,073
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)	[1]	4,217	337
Properties and equipment, net	[1]	40	144
Goodwill	[1]	458	458
Other branch related assets held for sale	[1]	249	0
Other assets, net of allowance for credit losses of $1 million and $2 million at December 31, 2021 and 2020, respectively	[1]	5,439	6,084
Total assets	[1]	189,232	196,434
Domestic deposits:
Noninterest bearing	[1]	40,333	32,428
Interest bearing (includes $2.7 billion and $4.2 billion designated under fair value option at December 31, 2021 and 2020, respectively)	[1]	89,122	107,427
Foreign deposits - interest bearing	[1]	4,827	5,295
Deposits held for sale		8,750	0	[1]
Total deposits		143,032	145,150
Short-term borrowings	[1]	6,338	4,952
Long-term debt (includes $8.9 billion and $10.7 billion designated under fair value option at December 31, 2021 and 2020, respectively)	[1]	17,236	19,979
Total debt	[1]	166,606	170,081
Trading liabilities	[1]	3,023	5,397
Other branch related liabilities held for sale	[1]	152	0
Interest, taxes and other liabilities	[1]	2,411	2,665
Total liabilities	[1]	172,192	178,143
Equity
Preferred stock (no par value; 40,999,000 shares authorized; 1,265 shares issued and outstanding at both December 31, 2021 and 2020)		1,265	1,265
Common equity:
Common stock ($5 par value; 150,000,000 shares authorized; 714 shares issued and outstanding at both December 31, 2021 and 2020)		0	0
Additional paid-in capital		14,742	15,746
Retained earnings		1,212	601
Accumulated other comprehensive income (loss)		(179)	679
Total common equity		15,775	17,026
Total equity		17,040	18,291
Total liabilities and equity		$ 189,232	$ 196,434
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Assets pledged to creditors, trading assets		$ 1,773	$ 1,265
Amortized Cost		35,356	39,636
Securities available-for-sale, allowance for credit losses		1	1
Securities held-to-maturity, allowance for credit losses		1	2
Fair Value		5,359	9,369
Loans, designated under fair value option		0	32
Loans held-for-sale, designated under fair value option		48	36
Loans held for sale	[1]	4,217	337
Other assets, allowance for credit losses		$ 1	$ 2
Preferred stock, par value (usd per share)		$ 0	$ 0
Preferred stock, shares authorized (shares)		40,999,000	40,999,000
Preferred stock, shares issued (shares)		1,265	1,265
Preferred stock, shares outstanding (shares)		1,265	1,265
Common stock, par value (usd per share)		$ 5	$ 5
Common stock, shares authorized (shares)		150,000,000	150,000,000
Common stock, shares issued (shares)		714	714
Common stock, shares outstanding (shares)		714	714
Assets:
Loans	[1]	$ 55,864	$ 62,088
Other assets	[1]	5,439	6,084
Total assets	[1]	189,232	196,434
Liabilities:
Interest, taxes and other liabilities	[1]	2,411	2,665
Total liabilities	[1]	172,192	178,143
Variable interest entities
Assets:
Loans		46	10
Other assets		55	79
Total assets		101	89
Liabilities:
Interest, taxes and other liabilities		9	10
Total liabilities		9	10
Retail Branches Sold
Loans held for sale		2,441
Student Loans
Loans, designated under fair value option		25	32
Commercial loans held for sale
Loans held-for-sale, designated under fair value option		23	36
Deposits
Deposits designated under fair value option		2,700	4,200
Fixed rate long-term debt
Long-term debt designated under fair value option		8,900	10,700
Trading assets
Assets pledged to creditors, trading assets		1,749	1,265
Securities available-for-sale ("AFS")
Assets pledged to creditors, securities-available-for-sale		$ 2,410	$ 2,077
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Cumulative Effect, Period of Adoption, AdjustmentRetained earnings	Cumulative Effect, Period of Adoption, AdjustmentStudent LoansRetained earnings	Cumulative Effect, Period of Adoption, ReclassificationRetained earnings	Cumulative Effect, Period of Adoption, ReclassificationAccumulated other comprehensive income (loss)	Cumulative Effect, Period of Adoption, Adjusted BalanceRetained earnings	Cumulative Effect, Period of Adoption, Adjusted BalanceAccumulated other comprehensive income (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of shares at beginning and end of period		1,265	714
Balance at beginning of period at Dec. 31, 2018		$ 1,265
Balance at beginning of period, common equity at Dec. 31, 2018			$ 0	$ 18,136	$ 1,471	$ (366)	$ 27				$ 1,498	$ (366)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Return of capital to parent				(2,400)
Employee benefit plans				0
Net income (loss)	$ 113				113
Cash dividends declared on preferred stock					(77)
Other comprehensive income (loss), net of tax	87					87
Balance at end of period, common equity at Dec. 31, 2019	16,991		$ 0	15,736	1,534	(279)	$ 84	$ 2	$ (2)	$ 2	1,618	(277)
Balance at end of period at Dec. 31, 2019	18,256	$ 1,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of shares at beginning and end of period		1,265	714
Return of capital to parent				0
Employee benefit plans				10
Net income (loss)	(940)				(940)
Cash dividends declared on preferred stock					(77)
Other comprehensive income (loss), net of tax	956					956
Balance at end of period, common equity at Dec. 31, 2020	17,026		$ 0	15,746	601	679					$ 601	$ 679
Balance at end of period at Dec. 31, 2020	18,291	$ 1,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of shares at beginning and end of period		1,265	714
Return of capital to parent				(1,000)
Employee benefit plans				(4)
Net income (loss)	688				688
Cash dividends declared on preferred stock					(77)
Other comprehensive income (loss), net of tax	(858)					(858)
Balance at end of period, common equity at Dec. 31, 2021	15,775		$ 0	$ 14,742	$ 1,212	$ (179)
Balance at end of period at Dec. 31, 2021	$ 17,040	$ 1,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Number of shares at beginning and end of period		1,265	714

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Cash flows from operating activities
Net income (loss)		$ 688		$ (940)		$ 113
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		262		304		164
Goodwill impairment		0		784		365
Provision for credit losses		(570)		810		195
Deferred income tax provision		340		25		109
Net realized gains on securities available-for-sale		(73)		(137)		(88)
Net change in other assets and liabilities		172		(839)		1,846
Net change in loans held for sale:
Originations and purchases of loans held for sale		(2,544)		(3,044)		(3,364)
Sales and collections of loans held for sale		2,699		3,001		3,271
Net change in trading assets and liabilities		867		3,330		(6,882)
Lower of amortized cost or fair value adjustments on loans held for sale		14		22		(1)
Loss (gain) on instruments designated at fair value and related derivatives		(35)		(34)		13
Net cash provided by (used in) operating activities		1,820		3,282		(4,259)
Cash flows from investing activities
Net change in federal funds sold and securities purchased under agreements to resell		25,232		(17,908)		(7,670)
Securities available-for-sale:
Purchases of securities available-for-sale		(18,501)		(25,165)		(24,829)
Proceeds from sales of securities available-for-sale		10,324		11,857		12,878
Proceeds from paydowns and maturities of securities available-for-sale		12,030		10,190		9,121
Securities held-to-maturity:
Purchases of securities held-to-maturity		0		(515)		(1,468)
Proceeds from sales of securities held-to-maturity		0		340		0
Proceeds from paydowns and maturities of securities held-to-maturity		3,747		4,415		2,803
Change in loans:
Originations, net of collections		(618)		5,312		(532)
Loans sold to third parties		2,758		916		1,209
Net cash provided by (used for) sales (acquisitions) of properties and equipment		(3)		1		(61)
Net inflow related to the sale of certain private banking client relationships.		0		0		1
Other, net		103		(248)		119
Net cash provided by (used in) investing activities		35,072		(10,805)		(8,429)
Cash flows from financing activities
Net change in deposits		(2,107)		20,110		8,287
Debt:
Net change in short-term borrowings		1,386		1,293		(535)
Issuance of long-term debt		7,711		8,487		4,686
Repayment of long-term debt		(10,044)		(10,427)		(10,705)
Return of capital to parent		(1,000)		0		(2,400)
Other increases (decreases) in capital surplus		(4)		10		0
Dividends paid		(77)		(77)		(77)
Net cash provided by (used in) financing activities		(4,135)		19,396		(744)
Net change in cash and due from banks and interest bearing deposits with banks		32,757		11,873		(13,432)
Cash and due from banks and interest bearing deposits with banks at beginning of period		15,655	[1]	3,782	[1]	17,214
Cash and due from banks and interest bearing deposits with banks at end of period	[1]	48,412		15,655		3,782
Supplemental disclosure of cash flow information
Interest paid during the period		606		1,518		2,921
Net income taxes paid (refunded) during the period		(52)		50		159
Supplemental disclosure of non-cash investing activities
Transfer of loans to held for sale, net		6,982		1,030		1,209
Fair value of properties added to real estate owned upon foreclosure		0		2		16
Supplemental disclosure of non-cash financing activities
Recharacterization of long-term debt to time deposits		$ 0		$ 5,000		$ 0
[1]	Includes $58 million of cash which is reported in other branch related assets held for sale on the consolidated balance sheet at December 31, 2021.

CONSOLIDATED STATEMENT OF CAS_2

CONSOLIDATED STATEMENT OF CASH FLOWS (Parenthetical) $ in Millions	Dec. 31, 2021USD ($)
Retail Branches Sold
Cash and other assets	$ 58

Organization

Organization	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization HSBC USA Inc. ("HSBC USA"), incorporated under the laws of Maryland, is a New York State based bank holding company and a wholly-owned subsidiary of HSBC North America Holdings Inc. ("HSBC North America"), which is an indirect wholly-owned subsidiary of HSBC Holdings plc ("HSBC" and, together with its subsidiaries, "HSBC Group"). HSBC USA (together with its subsidiaries, "HUSI") may also be referred to in these notes to the consolidated financial statements as "we," "us" or "our." Through our subsidiaries, we offer a wide range of commercial and consumer banking products and related financial services. HSBC Bank USA, National Association (together with its subsidiaries, "HSBC Bank USA"), our principal U.S. banking subsidiary, is a national banking association with branch offices and representative offices across the United States. In addition to our domestic offices, we maintain foreign branch offices, subsidiaries and/or representative offices in Europe, Asia and Latin America. HSBC Bank USA is also an international dealer in derivative instruments denominated in U.S. dollars and other currencies, focusing on structuring transactions to meet clients' needs.

Summary of Significant Accounti

Summary of Significant Accounting Policies and New Accounting Pronouncements	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies and New Accounting Pronouncements	Summary of Significant Accounting Policies and New Accounting Pronouncements Significant Accounting Policies Basis of Presentation The consolidated financial statements include the accounts of HSBC USA and all subsidiaries in which we hold, directly or indirectly, more than 50 percent of the voting rights, or where we exercise control, including all variable interest entities ("VIEs") in which we are the primary beneficiary. Investments in companies where we have significant influence over operating and financing decisions, which primarily are those where the percentage of ownership is at least 20 percent but not more than 50 percent, are accounted for under the equity method and reported as equity method investments in other assets. All significant intercompany accounts and transactions have been eliminated. We assess whether an entity is a VIE and, if so, whether we are its primary beneficiary at the time of initial involvement with the entity and on an ongoing basis. A VIE is an entity in which the equity investment at risk is not sufficient to finance the entity's activities without additional subordinated financial support, or as a group, the holders of equity investment at risk lack either a) the power through voting rights or similar rights to direct the activities of the entity that most significantly impacts the entity's economic performance; or b) the obligation to absorb the entity's expected losses, the right to receive the expected residual returns, or both. A VIE must be consolidated by its primary beneficiary, which is the entity with the power to direct the activities of a VIE that most significantly impact its economic performance and the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Areas which we consider to be critical accounting estimates and require a high degree of judgment and complexity include allowance for credit losses, goodwill impairment, valuation of financial instruments and deferred tax asset valuation allowances. Certain reclassifications have been made to prior period amounts to conform to the current period presentation. Cash and Cash Equivalents For the purpose of reporting cash flows, cash and cash equivalents include both cash and due from banks and interest bearing deposits with banks, which are inclusive of any restricted cash. Prior to 2020, restricted cash represented required reserve balances maintained with the Federal Reserve Bank. In 2020, the Federal Reserve Board ("FRB") announced it had eliminated its reserve requirement. Resale and Repurchase Agreements We enter into purchases and borrowings of securities under agreements to resell (resale agreements) and sales of securities under agreements to repurchase (repurchase agreements) substantially identical securities. Resale and repurchase agreements are accounted for as secured lending and secured borrowing transactions, respectively. The amounts advanced under resale agreements and the amounts borrowed under repurchase agreements are carried on the consolidated balance sheet at the amount advanced or borrowed. Interest earned on resale agreements is reported as interest income. Interest paid on repurchase agreements is reported as interest expense. We offset resale and repurchase agreements executed with the same counterparty under legally enforceable netting agreements that meet the applicable netting criteria as permitted by generally accepted accounting principles. Repurchase agreements may require us to deposit cash or other collateral with the lender. In connection with resale agreements, it is our policy to obtain possession of collateral, which may include the securities purchased, with market value in excess of the principal amount loaned. The market value of the collateral subject to the resale and repurchase agreements is regularly monitored, and additional collateral is obtained or provided when appropriate, to ensure appropriate collateral coverage of these secured financing transactions. Trading Assets and Liabilities Financial instruments utilized in trading activities are stated at fair value. Fair value is generally based on quoted market prices. If quoted market prices are not available, fair values are estimated based on dealer quotes, pricing models, using observable inputs where available or quoted prices for instruments with similar characteristics. Where applicable, fair value is determined by reference to quotes provided by multiple independent pricing services. Fair value determined by internal pricing models is regularly substantiated by the price level executed in the market and the internal pricing models used are periodically validated by an internal Independent Model Review ("IMR") team. Realized and unrealized gains and losses are recognized in trading revenue. Securities Securities acquired principally for the purpose of selling them in the near term are classified as trading assets and reported at fair value. Fair value adjustments to trading securities and gains and losses on the sale of such securities are reported in trading revenue. Debt securities that we have the ability and intent to hold to maturity are reported at cost adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to yield over the contractual lives of the related securities. Premiums for non-contingently callable debt securities are amortized to the earliest call date, rather than the contractual maturity date. All other debt securities are classified as available-for-sale ("AFS") and carried at fair value, with unrealized gains and losses, net of related income taxes, recorded as adjustments to common equity as a component of accumulated other comprehensive income (loss). Accrued interest receivables for securities available-for-sale and securities held-to-maturity are reported net of any related allowance for credit losses in other assets on the consolidated balance sheet. Realized gains and losses on sales of securities available-for-sale are computed on a specific identified cost basis and are reported in other securities gains, net. Beginning January 1, 2020, an allowance for credit losses is recognized for debt securities, with changes in the allowance recorded in earnings. Prior to January 1, 2020, debt securities were assessed for other-than-temporary impairment. Other-than-temporary impairments were recorded as a direct write-down of the security’s amortized cost basis. During 2019, none of our debt securities were determined to be other-than-temporarily impaired. See under the heading "Allowance for credit losses" below for further discussion of our policies for establishing an allowance for credit losses on debt securities. Equity securities that are not classified as trading are reported in other assets and measured at fair value with changes in fair value recognized in other income (loss). Equity securities that are not considered to have readily determinable fair values are carried at amortized cost, less impairment, adjusted for observable price changes. Investments in Federal Home Loan Bank stock and Federal Reserve Bank stock are recorded at cost less impairment. Loans Loans are carried at amortized cost, with the exception of certain student loans for which the fair value option was elected beginning January 1, 2020 and are further discussed in Note 17, "Fair Value Option." These student loans were transferred to held for sale during the fourth quarter of 2021. Amortized cost represents the principal amount outstanding, net of unearned income, charge-offs, unamortized purchase premium or discount, unamortized nonrefundable fees and related direct loan origination costs and purchase accounting fair value adjustments. The carrying amount of loans represents their amortized cost reduced by the allowance for credit losses. See under the heading "Allowance for Credit Losses" below for further discussion of our policies for establishing an allowance for credit losses on loans. Premiums and discounts and purchase accounting fair value adjustments are recognized as adjustments to yield over the estimated or contractual lives of the related loans. Interest income is recorded based on the effective interest method. Accrued interest receivables for loans are reported net of any related allowance for credit losses in other assets on the consolidated balance sheet. For credit card receivables, accrued interest is recognized in the loan balance as it is billed, with the related allowance recorded in the allowance for credit losses on loans. Nonrefundable fees and related direct costs associated with the origination of loans are deferred and netted against outstanding loan balances. The amortization of net deferred fees, which include points on real estate secured loans and costs, is recognized in interest income, generally by the interest method, based on the estimated or contractual lives of the related loans. Amortization periods are periodically adjusted for loan prepayments and changes in other market assumptions. Annual fees on credit cards, net of direct lending costs, are deferred and amortized on a straight-line basis over one year. Nonrefundable fees related to lending activities other than direct loan origination are recognized in other revenues over the period in which the related service is provided. This includes fees associated with loan commitments, revolving credit facilities, standby letters of credit, loan syndication and other transaction based fees. Loan syndication fees received for managing a syndication and other transaction based fees are recognized at the point in time the transaction occurs. Fees associated with loan commitments, revolving credit facilities and standby letters of credit are recognized on a straight-line basis over the period the service is performed. In the event a loan commitment or standby letter of credit is exercised, the remaining unamortized fee is recognized as an adjustment to yield over the loan term. For additional information, as well as a full discussion of how revenue associated with all of our various fee-based activities is recognized, see Note 23, "Fee Income from Contracts with Customers." Troubled debt restructurings ("TDR Loans") represent loans for which the original contractual terms have been modified to provide for terms that are less than we would be willing to accept for new loans with comparable risk because of deterioration in the borrower's financial condition. Interest on TDR Loans is recognized when collection is reasonably assured. For commercial nonaccrual TDR Loans, the resumption of interest accrual generally occurs when the borrower has complied with the modified payment terms and conditions for twelve months while maintaining compliance with other terms and conditions of that specific restructuring. For consumer nonaccrual TDR Loans, interest accruals are resumed when the loan becomes current or becomes less than 90 days delinquent and six months of consecutive payments have been made. Modifications resulting in TDR Loans may include changes to one or more terms of the loan, including but not limited to, a change in interest rate, an extension of the amortization period, a reduction in payment amount and partial forgiveness or deferment of principal, accrued interest or other loan covenants. For reserving purposes, beginning in 2020, we also identify loans that we reasonably expect to become TDR Loans. See under the heading "Allowance for Credit Losses" below for further discussion. Coronavirus ("COVID-19") Loan Forbearance Initiatives We implemented various loan modification programs to provide borrowers relief from the economic impacts of the COVID-19 pandemic. In 2020, the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was signed into law, which provided financial institutions with the option to temporarily suspend certain requirements under U.S. GAAP related to TDR Loans beginning March 1, 2020. This TDR Loan guidance expired on January 1, 2022. We elected to adopt the TDR Loan guidance in the CARES Act and did not apply TDR Loan classification to COVID-19 related loan modifications in the form of a long-term payment deferral (for commercial loans all payment modifications, including all payment deferrals) granted to borrowers that were current (less than 30 days past due) as of December 31, 2019 which otherwise may have been reported as TDR Loans. In 2020, federal banking regulators issued a revised interagency statement on loan modifications and the reporting for financial institutions working with customers affected by the COVID-19 pandemic ("Interagency Statement"). The Interagency Statement confirmed that COVID-19 related short-term loan modifications (e.g., payment deferrals of six months or less) provided to borrowers that were current (less than 30 days past due) at the time the relief was granted were not TDR Loans. Borrowers that did not meet the criteria in the CARES Act or the Interagency Statement were assessed for TDR Loan classification in accordance with our accounting policies. In addition, under the Interagency Statement, for COVID-19 related loan modifications in the form of a payment deferral, the borrower’s past due status was not affected during the deferral period and, if the loan was accruing at the time the relief was granted, the loan was generally not placed on nonaccrual status as long as the borrower utilized a payment deferral of six months or less. For consumer mortgage loans, when a borrower utilized a payment deferral of more than six months, the loan was generally placed on nonaccrual status and, if the loan did not meet the criteria in the CARES Act, assessed for TDR Loan classification. Any accrued interest recorded on these loans was generally not reversed against income and remained recorded as accrued interest receivable. We did not modify our commercial loan nonaccrual policies as a result of this guidance. Allowance for Credit Losses Beginning January 1, 2020, an allowance for credit losses is recognized based on lifetime expected credit losses ("lifetime ECL") for loans, securities held-to-maturity and certain other financial assets measured at amortized cost, and an allowance for credit losses is also recognized for securities available-for-sale. Prior to January 1, 2020, an allowance for credit losses was recognized based on probable incurred losses for loans only while debt securities were assessed for other-than-temporary impairment. In addition, beginning January 1, 2020, the liability for off-balance sheet credit exposures is recognized based on lifetime ECL while, prior to January 1, 2020, it was recognized based on probable incurred losses. Expected recoveries of amounts previously written off, limited to the cumulative amount of prior write-offs, are also considered when estimating the allowance for credit losses for in scope financial assets (including collateral-dependent assets). Prior to January 1, 2020, these expected recoveries were not recognized. We maintain an allowance for credit losses that is, in the judgment of management, adequate to absorb estimated lifetime ECL for loans and other financial assets measured at amortized cost. The adequacy of the allowance for credit losses is assessed in accordance with generally accepted accounting principles and is based, in part, upon an evaluation of various factors including: • an analysis of individual exposures where applicable; • current and historical loss experience; • changes in the overall size and composition of the portfolio; • specific adverse situations; and • general and forecasted economic conditions. Allowance for credit loss estimates are reviewed periodically and adjustments are recognized in the provision for credit losses during the period they become known. Because our estimates of the allowance for credit losses involve management judgment and are influenced by factors outside of our control, there is uncertainty inherent in these estimates. Measurement of ECL Estimates The recognition and measurement of lifetime ECL is highly complex and involves the use of significant judgment and estimation. Multiple forward-looking economic forecasts are formulated and incorporated into the lifetime ECL calculations when estimating the allowance for credit losses for in scope financial assets and the liability for off-balance sheet credit exposures as discussed below under Calculation of Lifetime ECL . We utilize a standard framework to form economic scenarios to reflect assumptions about future economic conditions supplemented by the use of management judgment, which may result in using alternative or additional economic scenarios and/or management adjustments. Methodology HUSI has adopted the use of a minimum of three forward-looking economic scenarios, representative of management's view of forecasted economic conditions, sufficient to calculate unbiased expected loss in most economic environments. They represent a 'most likely outcome' (the "Central scenario") and two less likely 'outer' scenarios, referred to as the "Upside scenario" and the "Downside scenario". Each scenario is assigned a weighting with the significant majority of the weighting placed on the Central scenario and lower equal weights placed on the Upside and Downside scenarios. This weighting is deemed appropriate for the estimation of lifetime ECL in most economic environments, unless determined otherwise. At management's discretion, changes may be made to the weighting assigned to the three scenarios or additional scenarios may be included in order to consider current economic conditions. See Note 8, "Allowance for Credit Losses," for further discussion. Key Central scenario assumptions as further discussed below are set using the average of forecasts of external economists, helping to ensure the scenarios are unbiased and maximize the use of independent information, except when in management's judgment these scenarios may not adequately reflect the impact of recent events and it is believed not to be representative of the current economic environment. The Central, Upside and Downside scenarios selected with reference to external forecast distributions using the above approach are termed the "Consensus Economic Scenarios". We have determined that two years is a reasonable and supportable forecast period for the Consensus Economic Scenarios. At the end of the two year reasonable and supportable forecast period, assumption variables start to revert to their 20-year average of historical values over a reversion period. The reversion period for most assumption variables is generally three years, but is longer in some specific cases. The reversion path for this period is linear for all variables. For the Central scenario, we set key assumptions such as Gross Domestic Product ("GDP") growth, inflation, unemployment, house price growth, U.S. Treasury yields, equity price growth, short-term interest rates and oil price using either the average of external forecasts (commonly referred to as consensus forecasts) or market implied rates. An external provider's model, conditioned to follow the consensus forecasts for the above key assumption variables, projects the remaining variable paths required as inputs to credit models. This external provider is subject to our risk governance framework, including oversight by an internal IMR team. The Upside and Downside scenarios are constructed following a standard process supported by a scenario narrative reflecting our top and emerging risks and by consulting external and internal subject matter experts. They are designed to be cyclical in that GDP growth, inflation and unemployment usually revert back to the Central scenario after the first two years. We determine the maximum divergence of GDP growth from the Central scenario using the 10th and the 90th percentile of the entire distribution of consensus forecast outcomes. Using externally available forecast distributions ensures independence in scenario construction. Key economic variables are set with reference to external distributional forecasts and we project additional variable paths using the external provider's model. Generally, the Upside and Downside scenarios are generated at year-end and are only updated during the year if economic conditions change significantly. The Central scenario is generated every quarter. In quarters where only the Central scenario is updated, the Upside and Downside scenarios used for commercial loans are adjusted such that the relationship between the key assumptions used in the Central scenario and the Upside and Downside scenarios in the quarter is consistent with that observed at the last full scenario generation. For consumer loans, in quarters where only the Central scenario is updated, the relationship between the Central scenario and the Upside and Downside scenarios is held constant with that observed at the last full scenario generation. As a result of the deterioration of economic conditions and economic uncertainty caused by the COVID-19 pandemic, beginning in the second quarter of 2020 and throughout 2021, we have been updating our three Consensus Economic Scenarios as well as a fourth scenario, referred to as the "Alternative Downside Scenario", every quarter. See Note 8, "Allowance for Credit Losses," for further discussion summarizing the key macroeconomic variable forecasts used in our economic scenarios as well as a discussion of updates to the economic scenarios and other changes during 2021. We exclude from our lifetime ECL calculation financial assets for which we expect that non-payment of the amortized cost basis will be zero ("Zero Expected Credit Loss Exception"). As a result, no allowance for credit losses is recorded for these financial assets. We have identified the following types of financial assets which we believe qualify for this exclusion: • U.S. Treasury securities; • U.S. Government agency issued or guaranteed securities; • U.S. Government sponsored enterprises securities; • G10 sovereign foreign debt securities; • Interest bearing deposits held with the Federal Reserve Bank; and • Loans guaranteed by a U.S. Government agency or U.S. Government sponsored enterprise, including Paycheck Protection Program ("PPP") loans. We also exclude from our lifetime ECL calculation financial assets which are secured by collateral maintenance provisions (e.g., the borrower is contractually required to adjust the amount of financial collateral securing the financial asset) if such collateral meets liquidity requirements. In most circumstances subject to such requirements, collateral exceeds our amortized cost basis and no allowance for credit losses is recorded for these financial assets, consisting of the substantial majority of our securities purchased under agreements to resell as well as substantially all of our margin loans provided to our private banking customers. In addition, loans to other HSBC affiliated entities are exempt from ECL measurement. Calculation of Lifetime ECL Commercial loans Commercial loans are monitored on a continuous basis with a formal assessment completed, at a minimum, annually. As part of this process, a credit rating is assigned and a loss given default ("LGD") is estimated and serve as the basis for establishing an allowance for these loans' expected balance at default ("EAD") based on a probability of default ("PD") estimate associated with each credit rating under our credit risk policies. In assigning the credit ratings to a particular loan, among the risk factors considered are the obligor's debt capacity and financial position, the level of earnings, the amount and sources for repayment, the level of contingencies, management strength and the industry or geography in which the obligor operates. We utilize a consistent methodology for the application of forward economic guidance ("FEG") into the calculation of lifetime ECL by incorporating FEG into the estimation of the term structure of PD and LGD. For PDs, we consider the correlation of FEG to default rates for a particular industry. For LGDs, we consider the correlation of FEG to collateral values and realization rates for a particular industry and if applicable, country which is adjusted for recoveries. Our PD estimates are validated on an annual basis using back-testing of actual default rates and benchmarking of the internal ratings with external rating agency data like Standard and Poor's ("S&P") ratings and default rates. PDs and LGDs are estimated for the entire term structure of the loan. Credit Review, a function independent of the business, provides an on-going assessment of lending activities that includes independently assessing credit ratings and LGD estimates for sampled credits across various portfolios. Loans with similar risk characteristics are pooled for determining lifetime ECL. When it is deemed probable based upon known facts and circumstances that full interest and principal on an individual loan will not be collected in accordance with its contractual terms, in general the loan is no longer considered part of the collective pool of homogeneous loans against which lifetime ECL are established. Instead, an allowance for credit losses is established on an individual basis ("individually assessed") primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or the fair value of the collateral if the loan is collateral dependent. Individually assessed loans are evaluated quarterly. Generally, loans that are placed on non-accrual must be removed from a collective pool and individually assessed. In addition, the allowance for credit losses reflects management judgment of risk factors that may not be fully reflected in the lifetime ECL generated by our models. In making this determination, we consider the characteristics of our portfolio and any other significant factors that are relevant. Factors that are relevant to determining the expected collectability of our loan portfolio include, but are not limited to, the volume and severity of past due loans, the volume and severity of adversely classified or rated loans, the underlying collateral on loans that are not collateral dependent, lending policies and procedures including changes in lending strategies, underwriting standards or collection and recovery practices as well as the obligor's operations, environmental factors of an obligor and the areas in which our credit exposure is concentrated, the non-homogeneous nature of the portfolio, changes and expected changes in the general market condition of either a geographical area or an industry, and changes in international, national, regional, and local economic and business conditions. For loans which have been identified as TDR Loans, including beginning in 2020 loans which we reasonably expect to become TDR Loans, judgment will be used as to whether or not we expect full repayment of principal and interest. If full repayment is expected, the loan will remain in a collective pool of homogeneous loans for determining lifetime ECL. When full repayment of principal and interest is not expected or, beginning in 2020, when we anticipate offering payment concessions, the loan will be removed from the pool and individually assessed. If a commercial TDR Loan subsequently performs in accordance with the new terms and the loan is upgraded, it is possible the loan will no longer be reported as a TDR Loan at the earliest one year after the restructure had been anticipated. Consumer loans For pools of homogeneous consumer loans and certain small business loans, we estimate lifetime ECL using a component based framework based on PD, LGD and EAD that estimates the likelihood that a loan will progress through the various stages of delinquency and ultimately charge-off based upon a forward-looking view of macro-economic expectations that impact a lifetime ECL and historical experience. The impact of FEG on PD is modeled at the loan or segment level depending on the portfolio. Historic relationships between observed default rates and macroeconomic variables are integrated into lifetime ECL estimates by leveraging economic response models. The impact of FEG on PD is modeled over a period equal to the remaining maturity of the underlying loans. The impact on LGD is modeled for mortgage portfolios by forecasting future loan-to-value ("LTV") profiles for the remaining maturity of the loans by leveraging national forecasts of the House Price Index ("HPI") and applying the corresponding LGD expectation. The models consider delinquency status, loss experience and severity, and take into account where borrowers have historically filed for bankruptcy or have been subject to account management actions, such as the re-age or modification of accounts. Expected loss severity is based on the underlying collateral, if any, for the loan in the event of default based on historical and recent trends which are updated periodically based on a rolling average of several months' data using the most recently available information and is typically in the range of 20-40 percent for residential mortgages and 70-100 percent for home equity mortgages. The lifetime ECL recognized for consumer loans considers the effect on lifetime ECL over a range of potential outcomes, calculated on a probability-weighted basis, based on the economic scenarios described above, including management judgment where required. Management judgment reflects consideration of risk factors that may not be fully reflected in the lifetime ECL generated by our models. In making this determination, we consider the characteristics of our portfolio and any other significant factors that are relevant. Factors that are relevant to determining the expected collectability of our consumer loan portfolio include, but are not limited to, changes in risk selection or underwriting standards, changes in collection, account management, charge-off and recovery practices, changes in loan concentrations affecting either the frequency or severity of losses, and changes in economic conditions. For loans which have been identified as TDR Loans, including beginning in 2020, loans which we reasonably expect to become TDR Loans, an allowance for credit losses is maintained primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or the fair value of the collateral if the loan is collateral dependent. Once a loan is classified as a TDR Loan, it continues to be reported as such until it is paid off or charged-off. Off-balance sheet credit exposures A separate liability for off-balance sheet credit exposures is also maintained, which is recorded in interest, taxes and other liabilities on the consolidated balance sheet and includes estimated lifetime ECL arising from off-balance sheet exposures such as letters of credit and unused commitments to extend credit. The process for measuring lifetime ECL on these exposures is consistent with that for commercial or consumer loans discussed above as applicable, but is subject to an additional parameter reflecting the likelihood that funding will occur. No lifetime ECL is recognized for off-balance sheet credit exposures that are unconditionally cancellable by us such as unused credit card lines. Securities held-to-maturity Due to the composition of our portfolio of securities held-to-maturity, substantially all of our portfolio qualifies for the Zero Expected Credit Loss Exception and has been excluded from our lifetime ECL calculation. Our methodology for calculating lifetime ECL for our securities held-to-maturity which do not qualify for the Zero Expected Credit Loss Exception is consistent with our methodology for calculating lifetime ECL for loans discussed above, including the use of probability-weighted scenarios, forward economic guidance and key model inputs. We calculate lifetime ECL for securities held-for-maturity based on the present value of expected future cash flows, discounted using the contractual interest rate which approximates the effective interest rate. Securities available-for-sale On a quarterly basis, we perform an assessment to determine whether there have b

Strategic Initiatives

Strategic Initiatives	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Strategic Initiatives	Strategic Initiatives In February 2020, our Board of Directors approved a strategic plan to restructure our operations ("Restructuring Plan") in alignment with HSBC’s global strategy to refocus our wholesale operations to better serve our international corporate clients and restructure our retail operations to better meet the needs of globally mobile and affluent clients. Our Restructuring Plan also includes streamlining our functional and operations support model by removing duplication and reducing the size of our balance sheet to better align with the scope and scale of the U.S. opportunity. As a result of the May 2021 decision to further reposition our Wealth and Personal Banking business, along with the identification of additional restructuring activities primarily relating to further simplifying our wholesale operations and support service functions as well as additional investments in systems infrastructure and new technologies, we currently expect to incur pre-tax charges over the three-year period of 2020-2022 of approximately $780-$860 million ($590-$650 million after-tax). The following table presents a summary of the total pre-tax charges we expect to incur by reportable segment: Expected Charges in Connection Minimum Maximum (in millions) Wealth and Personal Banking $ 215 $ 235 Commercial Banking 8 10 Markets and Securities Services 82 88 Global Banking and Markets Other 10 12 Corporate Center (1) 465 515 Total $ 780 $ 860 (1) Includes restructuring charges primarily related to lease impairment and other related costs, support service project costs and severance costs associated with certain centralized activities and functions. We continue to progress our Restructuring Plan, including simplification of our support service functions, consolidation of our retail middle and back office functions under a single operations structure and the exit of certain derivative contracts. In 2021, we also completed the consolidation of our wholesale middle and back office functions as well as the transfer of interest rate derivative contracts associated with Fixed Income activities to HSBC Bank plc. In addition, as noted above, during the second quarter of 2021, we made the decision to exit our mass market retail banking business, including the sale or closure of certain branches, and transferred certain assets and liabilities to held for sale. See Note 4, "Branch Assets and Liabilities Held for Sale," for additional information. In 2020, we also completed the initial consolidation of our retail branch network and the creation of our Wealth and Personal Banking business. To date, we have recorded a total of $569 million of pre-tax charges in connection with our Restructuring Plan, of which $289 million and $280 million were recorded during 2021 and 2020, respectively. We remain committed to our multi-year strategic plan to re-profile our business. The following table summarizes the changes in the liability associated with our Restructuring Plan during 2021 and 2020: Severance and Other Employee Costs (1) Lease Termination and Associated Costs (2) Other (3) Total (in millions) Year Ended December 31, 2021 Restructuring liability at beginning of period $ 10 $ 23 $ — $ 33 Restructuring costs accrued during the period 12 38 15 65 Restructuring costs paid during the period (12) (15) (15) (42) Restructuring liability at end of period $ 10 $ 46 $ — $ 56 Year Ended December 31, 2020 Restructuring liability at beginning of period $ — $ — $ — $ — Restructuring costs accrued during the period 28 29 — 57 Restructuring costs paid during the period (18) (6) — (24) Restructuring liability at end of period $ 10 $ 23 $ — $ 33 (1) Severance and other employee costs are included in salaries and employee benefits in the consolidated statement of income (loss). The majority of these costs were reported in the Wealth and Personal Banking business segment. Not included in these costs are allocated severance costs from HSBC Technology & Services ("HTSU") discussed further below. (2) Primarily includes real estate taxes, service charges and decommissioning costs. Lease termination and associated costs are included in occupancy expense, net in the consolidated statement of income (loss) and were reported in the Wealth and Personal Banking and the Corporate Center business segments. (3) Primarily includes professional fees and other staff costs, which are included in other expenses in the consolidated statement of income (loss). In addition to the restructuring costs reflected in the rollforward table above, during the second quarter of 2021, as part of our decision to exit our mass market retail banking business we determined that we would exit approximately 30 branches. As a result, we recorded impairment charges during the second quarter of 2021 to write-off the assets associated with these branches, including $29 million of lease ROU assets, $18 million of leasehold improvement assets and $3 million of equipment assets. During 2021, we also recorded impairment charges of $40 million to write-down the lease ROU assets and leasehold improvement assets primarily associated with certain office space that we determined we would exit and $13 million to write-down one of our owned office space properties to fair value upon transferring it to held for sale during the fourth quarter. During the first quarter of 2020, we determined that we would exit approximately 60 branches (in addition to the approximately 20 branches for which we disclosed plans to exit in 2019). As a result, we recorded impairment charges during 2020 to write-down the lease ROU assets, net of estimated sublease income, by $67 million and to write-down the leasehold improvement assets associated with these branches by $16 million based on their estimated remaining useful lives. These branches were closed in 2020. During 2020, we also recorded impairment charges of $9 million to write-down the lease ROU assets associated with certain office space that we determined we would exit. Lease impairment charges are reflected in occupancy expense, net in the consolidated statement of income (loss) and were reported in the Wealth and Personal Banking and the Corporate Center business segments. In addition, during 2021 and 2020, we recorded $35 million and $67 million, respectively, of trading losses associated with the continued exit of certain derivative contracts as part of our Restructuring Plan. These losses are included in trading revenue in the consolidated statement of income (loss) and were reported in the Markets and Securities Services and the Corporate Center business segments. Beginning in 2020 and into 2021, we also completed the transfer of substantially all interest rate derivative contracts associated with Fixed Income activities to HSBC Bank plc. These activities were being consolidated in and operated from HSBC Bank plc to better utilize HSBC Group's global scale, which allows us to record revenue as a business introducer and hold fewer assets on our balance sheet. Transfers of interest rate derivative contracts with a notional value of $25.9 billion and $64.6 billion were completed during 2021 and 2020, respectively. The remainder of these contracts not transferred are being retained as a run-off portfolio. The transferred derivatives were substantially fully collateralized which resulted in an immaterial impact on our consolidated balance sheet. Our Restructuring Plan also resulted in costs being allocated to us from HTSU, primarily support service project costs and severance costs, which are reflected in support services from HSBC affiliates in the consolidated statement of income (loss). During 2021, we recorded $86 million of allocated costs from HTSU related to restructuring activities compared with $64 million of allocated costs during 2020. These costs were reported in the Corporate Center business segment. HSBC Group Restructuring Separate from the charges related to our Restructuring Plan as detailed above, during 2021, we also recorded $53 million of allocated costs from other HSBC affiliates related to the HSBC Group's restructuring activities, primarily support service project costs and severance costs, compared with $16 million of allocated costs during 2020. These costs are reflected in support services from HSBC affiliates in the consolidated statement of income (loss) and were reported in the Corporate Center business segment.

Branch Assets and Liabilities H

Branch Assets and Liabilities Held for Sale	12 Months Ended
	Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Branch Assets and Liabilities Held for Sale	Branch Assets and Liabilities Held for Sale In May 2021, as part of our Restructuring Plan we announced that we would take further actions to strategically reposition our Wealth and Personal Banking business to focus on the banking and wealth management needs of globally-connected affluent and high net worth clients through our Premier, Jade and Private Banking propositions. We will exit our mass market retail banking business, including our Personal and Advance propositions as well as retail business banking, and will rebrand approximately 20-25 of our retail branches into international wealth centers to serve our Premier and Jade customers. In conjunction with the execution of this strategy, we have entered into definitive sale agreements with third parties to sell 90 of our retail branches along with substantially all residential mortgage, unsecured and retail business banking loans and all deposits in our branch network not associated with our Premier, Jade and Private Banking customers. Certain assets under management associated with our mass market retail banking operations which are managed by an affiliate will also be transferred to one of the buyers. The remaining branches not sold or rebranded will be closed. As a result of entering into these sale agreements, assets and liabilities with an aggregate carrying value of approximately $2.9 billion and $10.1 billion, respectively, were transferred to held for sale during the second quarter of 2021. The lower of amortized cost or fair value adjustment upon transferring these assets to held for sale was not material. We completed the sale of the disposal group in February 2022 which is expected to result in a gain on sale. During 2021, we recorded $8 million of transaction costs directly associated with these sales, which are reflected in other income (loss) in the consolidated statement of income (loss). Revenues (net interest income and other revenues) associated with the disposal group represented approximately 7 percent of total consolidated revenues for the year ended December 31, 2021. Income before tax associated with the disposal group was not material. The following table summarizes the assets and liabilities in the disposal group classified as held for sale at December 31, 2021 in our consolidated balance sheet: December 31, 2021 (in millions) Loans held for sale (1) $ 2,441 Other branch related assets held for sale: Lease ROU assets 151 Properties and equipment, net 40 Cash and other assets 58 Total other branch related assets held for sale 249 Total branch assets held for sale (2) $ 2,690 Deposits held for sale $ 8,750 Other branch related liabilities held for sale: Lease liabilities 144 Other liabilities 8 Total other branch related liabilities held for sale 152 Total branch liabilities held for sale (2) $ 8,902 (1) Includes $72 million of commercial loans, $1,845 million of residential mortgage loans, $217 million of home equity mortgage loans, $178 million of credit card loans and $129 million of other consumer loans. (2) The sale of this disposal group will result in a net cash payment as the liabilities being assumed are greater than the assets being purchased. In addition, mass market retail banking loans not included in the transaction described above as well as our remaining retail credit card portfolio, which collectively totaled $1.1 billion, were also transferred to held for sale during the second quarter of 2021 as we did not intend to hold these loans for the foreseeable future. The lower of amortized cost or fair value adjustment upon transferring these assets to held for sale was not material. During the fourth quarter of 2021, we sold a portfolio of mass market retail credit cards to a third party and, upon completion of the sale, a portfolio of Premier credit cards was transferred back to held for investment. See Note 9, "Loans Held for Sale," for additional details. Releases of the allowance for credit losses on the loans transferred to held for sale discussed above during the second quarter of 2021 resulted in a reduction to the provision for credit losses of approximately $101 million ($100 million of which related to consumer loans) during the second quarter of 2021. See Note 8, "Allowance for Credit Losses," for additional details.

Trading Assets and Liabilities

Trading Assets and Liabilities	12 Months Ended
	Dec. 31, 2021
Trading Assets And Liabilities [Abstract]
Trading Assets and Liabilities	Trading Assets and Liabilities Trading assets and liabilities consisted of the following: At December 31, 2021 2020 (in millions) Trading assets: U.S. Treasury $ 2,337 $ 5,145 U.S. Government sponsored enterprises 432 192 Asset-backed securities — 143 Foreign bonds 167 7,971 Equity securities 15,795 6,043 Precious metals 3,907 4,989 Derivatives, net 1,405 2,801 Total trading assets $ 24,043 $ 27,284 Trading liabilities: Securities sold, not yet purchased $ 1,103 $ 727 Payables for precious metals 46 2,312 Derivatives, net 1,874 2,358 Total trading liabilities $ 3,023 $ 5,397 At December 31, 2021 and 2020, the fair value of derivatives included in trading assets is net of $1,419 million and $2,763 million, respectively, relating to amounts recognized for the obligation to return cash collateral received under master netting agreements with derivative counterparties. At December 31, 2021 and 2020, the fair value of derivatives included in trading liabilities is net of $1,296 million and $3,377 million, respectively, relating to amounts recognized for the right to reclaim cash collateral paid under master netting agreements with derivative counterparties. See Note 16, "Derivative Financial Instruments," for further information on our trading derivatives and related collateral. Dividend income on equity securities held for trading, which is recorded in interest income in the consolidated statement of income (loss), totaled $157 million, $78 million and $37 million in 2021, 2020 and 2019, respectively. Trading security positions are held as economic hedges of derivative products issued to our clients.

Securities

Securities	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Securities	Securities Our securities available-for-sale and securities held-to-maturity portfolios consisted of the following: December 31, 2021 Amortized Allowance for Credit Losses Unrealized Unrealized Fair (in millions) Securities available-for-sale: U.S. Treasury $ 9,490 $ — $ 144 $ (72) $ 9,562 U.S. Government sponsored enterprises: Mortgage-backed securities 7,365 — 114 (115) 7,364 Collateralized mortgage obligations 1,787 — 8 (48) 1,747 Direct agency obligations 1,775 — 16 (4) 1,787 U.S. Government agency issued or guaranteed: Mortgage-backed securities 8,489 — 7 (66) 8,430 Collateralized mortgage obligations 3,730 — 7 (49) 3,688 Direct agency obligations 282 — 6 — 288 Asset-backed securities collateralized by: Home equity 20 (1) — — 19 Other 107 — — (6) 101 Foreign debt securities (1) 2,311 — 3 (2) 2,312 Total available-for-sale securities $ 35,356 $ (1) $ 305 $ (362) $ 35,298 Securities held-to-maturity: U.S. Government sponsored enterprises: Mortgage-backed securities $ 684 $ — $ 21 $ — $ 705 Collateralized mortgage obligations 492 — 26 — 518 U.S. Government agency issued or guaranteed: Mortgage-backed securities 1,104 — 24 — 1,128 Collateralized mortgage obligations 2,915 — 85 (1) 2,999 Obligations of U.S. states and political subdivisions 8 — — — 8 Asset-backed securities collateralized by residential mortgages 1 (1) 1 — 1 Total held-to-maturity securities $ 5,204 $ (1) $ 157 $ (1) $ 5,359 December 31, 2020 Amortized Allowance for Credit Losses Unrealized Unrealized Fair (in millions) Securities available-for-sale: U.S. Treasury $ 16,087 $ — $ 608 $ (47) $ 16,648 U.S. Government sponsored enterprises: Mortgage-backed securities 5,986 — 280 (2) 6,264 Collateralized mortgage obligations 1,676 — 19 (2) 1,693 Direct agency obligations 1,236 — 17 — 1,253 U.S. Government agency issued or guaranteed: Mortgage-backed securities 6,993 — 152 — 7,145 Collateralized mortgage obligations 2,093 — 22 (11) 2,104 Direct agency obligations 296 — 5 — 301 Asset-backed securities collateralized by: Home equity 28 (1) — — 27 Other 114 — — (10) 104 Foreign debt securities (1) 5,127 — 6 — 5,133 Total available-for-sale securities $ 39,636 $ (1) $ 1,109 $ (72) $ 40,672 Securities held-to-maturity: U.S. Government sponsored enterprises: Mortgage-backed securities $ 1,137 $ — $ 44 $ — $ 1,181 Collateralized mortgage obligations 780 — 53 — 833 U.S. Government agency issued or guaranteed: Mortgage-backed securities 1,947 — 76 — 2,023 Collateralized mortgage obligations 5,107 — 212 — 5,319 Obligations of U.S. states and political subdivisions 10 — 1 — 11 Asset-backed securities collateralized by residential mortgages 2 (2) 2 — 2 Total held-to-maturity securities $ 8,983 $ (2) $ 388 $ — $ 9,369 (1) Foreign debt securities represent public sector entity, bank or corporate debt. Securities Available-for-Sale The following provides additional information about our portfolio of securities available-for-sale: Allowance for credit losses On a quarterly basis, we perform an assessment to determine whether there have been any events or economic circumstances to indicate that a debt security available-for-sale in an unrealized loss position has suffered impairment due to credit factors. A debt security available-for-sale is considered impaired if its fair value is less than its amortized cost basis at the reporting date. If impaired, we assess whether the impairment is due to credit factors. If we intend to sell the debt security or if it is more-likely-than-not that we will be required to sell the debt security before the recovery of its amortized cost basis, the impairment is recognized and the unrealized loss is recorded as a direct write-down of the security's amortized cost basis with an offsetting entry to earnings. If we do not intend to sell the debt security or believe we will not be required to sell the debt security before the recovery of its amortized cost basis, the impairment is assessed to determine if a credit loss component exists. We use a discounted cash flow method to determine the credit loss component. In the event a credit loss exists, an allowance for credit losses is recorded in earnings for the credit loss component of the impairment while the remaining portion of the impairment attributable to factors other than credit loss is recognized, net of tax, in other comprehensive income (loss). The amount of impairment recognized due to credit factors is limited to the excess of the amortized cost basis over the fair value of the security available-for-sale. In determining whether a credit loss component exists, we consider a series of factors which include: • The extent to which the fair value is less than the amortized cost basis; • The credit protection features embedded within the instrument, which includes but is not limited to credit subordination positions, payment structure, over collateralization, protective triggers and financial guarantees provided by third parties; • Changes in the near term prospects of the issuer or the underlying collateral of a security such as changes in default rates, loss severities given default and significant changes in prepayment assumptions; • The level of excess cash flows generated from the underlying collateral supporting the principal and interest payments of the debt securities; and • Any adverse change to the credit conditions of the issuer, the monoline insurer or the security such as credit downgrades by external rating agencies or changes to internal ratings. At both December 31, 2021 and 2020, the allowance for credit losses on securities available-for-sale was $1 million. Securities in an unrealized loss position for which no allowance for credit losses has been recognized The following table summarizes gross unrealized losses and related fair values for securities available-for-sale by major security type at December 31, 2021 and 2020 classified as to the length of time the losses have existed: One Year or Less Greater Than One Year Number Gross Aggregate Number Gross Aggregate (dollars are in millions) At December 31, 2021 U.S. Treasury 11 $ (28) $ 1,784 9 $ (44) $ 856 U.S. Government sponsored enterprises 63 (155) 6,224 14 (12) 354 U.S. Government agency issued or guaranteed 59 (91) 8,972 15 (24) 769 Asset-backed securities — — — 3 (6) 101 Foreign debt securities 8 (2) 1,188 — — — Securities available-for-sale 141 $ (276) $ 18,168 41 $ (86) $ 2,080 At December 31, 2020 U.S. Treasury 5 $ (5) $ 751 13 $ (42) $ 1,271 U.S. Government sponsored enterprises 15 (3) 715 8 (1) 46 U.S. Government agency issued or guaranteed 13 (11) 1,482 3 — 8 Asset-backed securities 3 (10) 104 2 — — Foreign debt securities 6 — 766 5 — 241 Securities available-for-sale 42 $ (29) $ 3,818 31 $ (43) $ 1,566 Gross unrealized losses increased as compared with December 31, 2020 due primarily to increasing yields on U.S. Government sponsored mortgage-backed, U.S. Government agency mortgage-backed and U.S. Treasury securities. Although the fair value of a particular security may be below its amortized cost, it does not necessarily result in a credit loss and hence an allowance for credit losses. The decline in fair value may be caused by, among other things, the illiquidity of the market. We have reviewed the securities in an unrealized loss position for which no allowance for credit losses has been recognized in accordance with our accounting policies, discussed further above. At December 31, 2021, we do not consider any of these securities to be impaired due to credit factors as we expect to recover their amortized cost basis and we neither intend nor expect to be required to sell these securities prior to recovery, even if that equates to holding them until their individual maturities. However, impairments due to credit factors may occur in future periods if the credit quality of the securities deteriorates. Securities Held-to-Maturity The following provides additional information about our portfolio of securities held-to-maturity: Allowance for credit losses Due to the composition of our portfolio of securities held-to-maturity, substantially all of our portfolio qualifies for the Zero Expected Credit Loss Exception and has been excluded from our lifetime ECL calculation. See Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion. At December 31, 2021 and 2020, the allowance for credit losses on securities held-to-maturity was $1 million and $2 million, respectively. At December 31, 2021 and 2020, none of our securities held-to-maturity were past due or in nonaccrual status. Credit risk profile Securities are assigned a credit rating based on the estimated probability of default. The credit ratings are used as a credit quality indicator to monitor our securities held-to-maturity portfolio. We utilize S&P as the primary source of our credit ratings. If S&P ratings are not available, ratings by Moody's and Fitch are used in that order. Investment grade includes securities with credit ratings of at least BBB- or above. At December 31, 2021 and 2020, all of our securities held-to-maturity were investment grade. Other securities gains, net The following table summarizes realized gains and losses on investment securities transactions attributable to available-for-sale securities: 2021 2020 2019 (in millions) Gross realized gains $ 159 $ 174 $ 148 Gross realized losses (86) (37) (60) Net realized gains $ 73 $ 137 $ 88 Contractual Maturities and Yields The following table summarizes the amortized cost and fair values of securities available-for-sale and securities held-to-maturity at December 31, 2021 by contractual maturity. Expected maturities differ from contractual maturities because borrowers have the right to prepay obligations without prepayment penalties in certain cases. The table below also reflects the distribution of maturities of debt securities held at December 31, 2021, together with the approximate yield of the portfolio. The yields shown are calculated by dividing annualized interest income, including the accretion of discounts and the amortization of premiums, by the amortized cost of securities outstanding at December 31, 2021. Within After One After Five After Ten Amount Yield Amount Yield Amount Yield Amount Yield (dollars are in millions) Available-for-sale: U.S. Treasury $ 246 1.99 % $ 3,364 1.38 % $ 2,075 1.39 % $ 3,805 1.87 % U.S. Government sponsored enterprises — — 1,712 1.63 2,079 2.35 7,136 1.64 U.S. Government agency issued or guaranteed 71 .24 23 1.17 1 5.54 12,406 1.83 Asset-backed securities — — — — 107 4.14 20 .23 Foreign debt securities 1,122 .10 1,189 .57 — — — — Total amortized cost $ 1,439 .43 % $ 6,288 1.30 % $ 4,262 1.93 % $ 23,367 1.78 % Total fair value $ 1,442 $ 6,340 $ 4,346 $ 23,170 Held-to-maturity: U.S. Government sponsored enterprises $ 3 2.69 % $ 179 2.64 % $ 299 2.26 % $ 695 3.31 % U.S. Government agency issued or guaranteed 1 3.51 — — 8 5.38 4,010 2.55 Obligations of U.S. states and political subdivisions 3 3.92 3 2.68 2 4.32 — — Asset-backed securities — — — — — — 1 7.52 Total amortized cost $ 7 3.33 % $ 182 2.65 % $ 309 2.36 % $ 4,706 2.66 % Total fair value $ 8 $ 184 $ 318 $ 4,849 Equity Securities Equity securities that are not classified as trading and are included in other assets consisted of the following: At December 31, 2021 2020 (in millions) Equity securities carried at fair value $ 282 $ 284 Equity securities without readily determinable fair values 16 14 On a quarterly basis, we perform an assessment to determine whether any equity securities without readily determinable fair values are impaired. In the event an equity security is deemed impaired, the security is written down to fair value with impairment recorded in earnings. During 2021 and 2020, we determined that certain equity securities without readily determinable fair values were impaired and, as a result, we recorded impairment losses of $3 million and $2 million, respectively, as a component of other income (loss) in the consolidated statement of income (loss). During 2019, none of our equity securities without readily determinable fair values were determined to be impaired. Also included in other assets were investments in Federal Home Loan Bank ("FHLB") stock and Federal Reserve Bank stock of $110 million and $558 million, respectively, at December 31, 2021 and $259 million and $559 million, respectively, at December 31, 2020.

Loans

Loans	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Loans	Loans Loans consisted of the following: At December 31, 2021 2020 (in millions) Commercial loans: Real estate, including construction $ 8,234 $ 10,464 Business and corporate banking (1) 13,958 13,479 Global banking (2) 11,109 13,519 Other commercial: Affiliates (3) 2,793 1,100 Other 3,702 3,037 Total other commercial 6,495 4,137 Total commercial 39,796 41,599 Consumer loans: Residential mortgages 15,469 18,377 Home equity mortgages 325 727 Credit cards 204 1,066 Other consumer (4) 70 319 Total consumer (5) 16,068 20,489 Total loans $ 55,864 $ 62,088 (1) Includes loans funded under the PPP which totaled $262 million and $1,043 million at December 31, 2021 and 2020, respectively. PPP loans are fully guaranteed by the Small Business Administration, if certain conditions are met. (2) Represents large multinational firms including globally focused U.S. corporate and financial institutions, U.S. dollar lending to multinational banking clients managed by HSBC on a global basis and complex large business clients supported by Global Banking and Markets relationship managers. (3) See Note 24, "Related Party Transactions," for additional information regarding loans to HSBC affiliates. (4) Included certain student loans that we have elected to designate under the fair value option and are therefore carried at fair value, which totaled $32 million at December 31, 2020. These student loans were transferred to held for sale during the fourth quarter of 2021. See Note 17, "Fair Value Option," for further details. (5) The decrease in consumer loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021. See Note 9, "Loans Held for Sale," for additional information. We have loans outstanding to certain executive officers and directors. The loans were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other persons and do not involve more than normal risk of collectibility. The aggregate amount of such loans did not exceed 5 percent of total equity at either December 31, 2021 or 2020. Net deferred origination costs totaled $40 million and $57 million at December 31, 2021 and 2020, respectively. At December 31, 2021 and 2020, we had a net unamortized premium on our loans of $5 million and $9 million, respectively. COVID-19 Loan Forbearance Initiatives We implemented various loan modification programs to provide borrowers relief from the economic impacts of the COVID-19 pandemic. Substantially all of the loans under these programs were not classified as TDR Loans due to our election to suspend TDR Loan classification under the CARES Act (which expired on January 1, 2022) or their short-term nature as discussed under the Interagency Statement. In addition, under the Interagency Statement, for COVID-19 related loan modifications in the form of a payment deferral, the borrower’s past due status was not affected during the deferral period and, if the loan was accruing at the time the relief was granted, the loan was generally not placed on nonaccrual status as long as the borrower utilized a payment deferral of six months or less. For consumer mortgage loans, when a borrower utilized a payment deferral of more than six months, the loan was generally placed on nonaccrual status and, if the loan did not meet the criteria in the CARES Act, assessed for TDR Loan classification. We did not modify our commercial loan nonaccrual policies as a result of this guidance. See Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion. Aging Analysis of Past Due Loans The following table summarizes the past due status of our loans at December 31, 2021 and 2020. The aging of past due amounts is determined based on the contractual delinquency status of payments under the loan. An account is generally considered to be contractually delinquent when payments have not been made in accordance with the loan terms. Delinquency status is affected by customer account management policies and practices such as re-age, which results in the re-setting of the contractual delinquency status to current. For COVID-19 related loan modifications in the form of a payment deferral, the borrower’s past due status was not affected during the deferral period. Past Due Total Past Due 30 Days or More 30 - 89 Days 90+ Days Current (1) Total Loans (in millions) At December 31, 2021 Commercial loans: Real estate, including construction $ 38 $ — $ 38 $ 8,196 $ 8,234 Business and corporate banking 112 17 129 13,829 13,958 Global banking — 27 27 11,082 11,109 Other commercial 47 — 47 6,448 6,495 Total commercial 197 44 241 39,555 39,796 Consumer loans: Residential mortgages 138 63 201 15,268 15,469 Home equity mortgages 2 1 3 322 325 Credit cards 5 2 7 197 204 Other consumer 1 — 1 69 70 Total consumer (2) 146 66 212 15,856 16,068 Total loans $ 343 $ 110 $ 453 $ 55,411 $ 55,864 At December 31, 2020 Commercial loans: Real estate, including construction $ 78 $ — $ 78 $ 10,386 $ 10,464 Business and corporate banking 126 19 145 13,334 13,479 Global banking — 60 60 13,459 13,519 Other commercial 24 — 24 4,113 4,137 Total commercial 228 79 307 41,292 41,599 Consumer loans: Residential mortgages 435 311 746 17,631 18,377 Home equity mortgages 11 22 33 694 727 Credit cards 23 19 42 1,024 1,066 Other consumer 7 6 13 306 319 Total consumer 476 358 834 19,655 20,489 Total loans $ 704 $ 437 $ 1,141 $ 60,947 $ 62,088 (1) Loans less than 30 days past due are presented as current. (2) The decrease in consumer past due loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $419 million of consumer loans which were past due 30 days or more at the time of transfer. See Note 9, "Loans Held for Sale," for additional information. Contractual Maturities Contractual maturities of loans outstanding at December 31, 2021 were as follows: 2022 2023 - 2026 2027 - 2036 Thereafter Total (in millions) Commercial loans: Real estate, including construction $ 4,843 $ 3,183 $ 202 $ 6 $ 8,234 Business and corporate banking 8,211 5,395 342 10 13,958 Global banking 6,535 4,294 272 8 11,109 Other commercial 3,821 2,511 159 4 6,495 Consumer loans: Residential mortgages 223 57 667 14,522 15,469 Home equity mortgages (1) 118 157 33 17 325 Credit cards (2) — 204 — — 204 Other consumer 65 3 2 — 70 Total $ 23,816 $ 15,804 $ 1,677 $ 14,567 $ 55,864 (1) Home equity mortgage maturities reflect estimates based on historical payment patterns. (2) As credit card receivables do not have stated maturities, the table reflects an average estimate based on historical payment patterns. As a substantial portion of consumer loans, based on our experience, will be renewed or repaid prior to contractual maturity, the above maturity schedule should not be regarded as a forecast of future cash collections. The following table summarizes loans outstanding at December 31, 2021 due after one year by repricing characteristic: December 31, 2021 Receivables at Predetermined Interest Rates Receivables at Floating or Adjustable Rates Total Loans Due After One Year (in millions) Commercial loans: Real estate, including construction $ 240 $ 3,151 $ 3,391 Business and corporate banking 407 5,340 5,747 Global banking 324 4,250 4,574 Other commercial 189 2,485 2,674 Consumer loans: Residential mortgages 5,181 10,065 15,246 Home equity mortgages 23 184 207 Credit cards 26 178 204 Other consumer — 5 5 Total $ 6,390 $ 25,658 $ 32,048 Nonperforming Loans Nonperforming loans, including nonaccrual loans and accruing loans contractually 90 days or more past due, consisted of the following: Nonaccrual Loans Accruing Loans Contractually Past Due 90 Days or More Nonaccrual Loans With No Allowance For Credit Losses (in millions) At December 31, 2021 Commercial: Real estate, including construction $ 140 $ — $ 20 Business and corporate banking 134 1 69 Global banking 105 — 63 Total commercial 379 1 152 Consumer: Residential mortgages (1)(2)(3) 229 — 55 Home equity mortgages (1)(2) 9 — 4 Credit cards — 2 — Other consumer — — — Total consumer (4) 238 2 59 Total nonperforming loans $ 617 $ 3 $ 211 At December 31, 2020 Commercial: Real estate, including construction $ 44 $ — $ 31 Business and corporate banking 163 — 1 Global banking 337 — 93 Total commercial 544 — 125 Consumer: Residential mortgages (1)(2)(3) 1,079 — 241 Home equity mortgages (1)(2) 63 — 34 Credit cards — 19 — Other consumer — 2 — Total consumer 1,142 21 275 Total nonperforming loans $ 1,686 $ 21 $ 400 (1) At December 31, 2021 and 2020, nonaccrual consumer mortgage loans include $86 million and $375 million, respectively, of loans that are carried at the lower of amortized cost or fair value of the collateral less cost to sell. (2) Nonaccrual consumer mortgage loans include all loans which are 90 or more days contractually delinquent as well as loans discharged under Chapter 7 bankruptcy and not re-affirmed and second lien loans where the first lien loan that we own or service is 90 or more days contractually delinquent. At December 31, 2021 and 2020, nonaccrual consumer mortgage loans also included $12 million and $590 million, respectively, of loans under COVID-19 related payment deferral programs where the borrowers utilized a payment deferral of more than six months and, as a result, have been placed on nonaccrual status. (3) Nonaccrual consumer mortgage loans for all periods does not include guaranteed loans purchased from the Government National Mortgage Association. Repayment of these loans is predominantly insured by the Federal Housing Administration and as such, these loans have different risk characteristics from the rest of our consumer loan portfolio. (4) The decrease in consumer nonperforming loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $698 million of nonperforming consumer loans at the time of transfer, of which $21 million were accruing loans contractually 90 days or more past due. See Note 9, "Loans Held for Sale," for additional information. Interest income that was recorded on nonaccrual loans and included in interest income totaled $34 million, $12 million and $15 million during the years ended December 31, 2021, 2020 and 2019, respectively. Collateral-Dependent Loans Loans for which the repayment is expected to be provided substantially through the operation or sale of the collateral and the borrower is experiencing financial difficulty are considered to be collateral-dependent loans. Collateral can have a significant financial effect in mitigating our exposure to credit risk. Collateral-dependent residential mortgage loans are carried at the lower of amortized cost or fair value of the collateral less costs to sell, with any excess in the carrying amount of the loan generally charged off at the time foreclosure is initiated or when settlement is reached with the borrower, but not to exceed the end of the month in which the account becomes six months contractually delinquent. Collateral values are based on broker price opinions or appraisals which are updated at least every 180 days less estimated costs to sell. During the quarterly period between updates, real estate price trends are reviewed on a geographic basis and incorporated as necessary. At December 31, 2021 and 2020, we had collateral-dependent residential mortgage loans totaling $214 million and $817 million, respectively. For collateral-dependent commercial loans, the allowance for expected credit losses is individually assessed based on the fair value of the collateral. Various types of collateral are used, including real estate, inventory, equipment, accounts receivable, securities and cash, among others. For commercial real estate loans, collateral values are generally based on appraisals which are updated based on management judgment under the specific circumstances on a case-by-case basis. In situations where an appraisal is not used, borrower-specific factors such as operating results, cash flows and debt service ratios are reviewed along with relevant market data of comparable properties in order to create a 10-year cash flow model to be discounted at appropriate rates to present value. The collateral value for securities is based on their quoted market prices or broker quotes. The collateral value for other financial assets is generally based on appraisals or is estimated using a discounted cash flow analysis. Commercial loan balances are charged off at the time all or a portion of the balance is deemed uncollectible. At December 31, 2021 and 2020, we had collateral-dependent commercial loans totaling $347 million and $456 million, respectively. Troubled debt restructurings TDR Loans represent loans for which the original contractual terms have been modified to provide for terms that are less than what we would be willing to accept for new loans with comparable risk because of deterioration in the borrower's financial condition. Modifications for consumer or commercial loans may include changes to one or more terms of the loan, including, but not limited to, a change in interest rate, extension of the amortization period, reduction in payment amount and partial forgiveness or deferment of principal, accrued interest or other loan covenants. A substantial amount of our modifications involve interest rate reductions on consumer loans, which lower the amount of interest income we are contractually entitled to receive in future periods. Through lowering the interest rate and other loan term changes, we believe we are able to increase the amount of cash flow that will ultimately be collected from the loan, given the borrower's financial condition. Once a consumer loan is classified as a TDR Loan, it continues to be reported as such until it is paid off or charged-off. For commercial loans, if subsequent performance is in accordance with the new terms and the loan is upgraded, it is possible the loan will no longer be reported as a TDR Loan at the earliest one year after the restructuring. During 2021 and 2020, there were no commercial loans that met this criteria and were removed from TDR Loan classification. During 2019, a $12 million commercial loan met this criteria and was removed from TDR Loan classification. As previously discussed, we implemented various loan modification payment deferral programs to provide borrowers relief from the economic impacts of COVID-19. Substantially all of the loans under these programs were not classified as TDR Loans due to our election to suspend TDR Loan classification under the CARES Act (which expired on January 1, 2022) or their short-term nature as discussed under the Interagency Statement. If a borrower is experiencing financial difficulty when the payment relief period ends, they may enter into a modification program to reduce the interest rate and/or extend the term of the loan which would result in the loan being classified as a TDR Loan. We currently have $76 million of loans under COVID-19 related payment deferral programs that will need to be assessed for TDR Loan classification when they exit the program. The following table summarizes our TDR Loans at December 31, 2021 and 2020: At December 31, 2021 2020 (in millions) Commercial loans: Business and corporate banking $ 38 $ 94 Global banking 25 74 Total commercial (1)(2) 63 168 Consumer loans: Residential mortgages (3)(4) 125 582 Home equity mortgages (3)(4) 9 31 Credit cards 3 5 Total consumer (5) 137 618 Total TDR Loans (6) $ 200 $ 786 (1) Additional commitments to lend to commercial borrowers whose loans have been modified in TDR Loans totaled $13 million and $107 million at December 31, 2021 and 2020, respectively. (2) Not included in the table at December 31, 2021 and 2020 are $42 million and $924 million, respectively, of commercial loans that were exempted from TDR assessment due to our CARES Act election. (3) At December 31, 2021 and 2020, the carrying value of consumer mortgage TDR Loans includes $104 million and $487 million, respectively, of loans that are recorded at the lower of amortized cost or fair value of the collateral less cost to sell. (4) Not included in the table at December 31, 2021 and 2020 are $16 million and $736 million, respectively, of consumer mortgage loans under COVID-19 related payment deferral programs where the borrowers were provided with extended payment deferral relief of more than six months that were exempted from TDR assessment due to our CARES Act election. (5) The decrease in consumer TDR Loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $416 million of consumer TDR Loans at the time of transfer. See Note 9, "Loans Held for Sale," for additional information. (6) At December 31, 2021 and 2020, the carrying value of TDR Loans includes $115 million and $463 million, respectively, of loans which are classified as nonaccrual. The following table presents information about loans which were modified during 2021, 2020 and 2019 and as a result of this action became classified as TDR Loans: Year Ended December 31, 2021 2020 2019 (in millions) Commercial loans: Business and corporate banking $ 11 $ 95 $ — Global banking 15 44 — Total commercial 26 139 — Consumer loans: Residential mortgages 36 78 8 Home equity mortgages 1 3 1 Credit cards 2 4 3 Total consumer 39 85 12 Total $ 65 $ 224 $ 12 The weighted-average contractual rate reduction for consumer loans which became classified as TDR Loans during 2021, 2020 and 2019 was 2.08 percent, 1.75 percent and 2.18 percent, respectively. The weighted-average contractual rate reduction for commercial loans was not significant in either the number of loans or rate. The following table presents consumer loans which were classified as TDR Loans during the previous 12 months which subsequently became 60 days or greater contractually delinquent during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in millions) Consumer loans: Residential mortgages $ 5 $ 5 $ 3 Total consumer $ 5 $ 5 $ 3 During the years ended December 31, 2021, 2020 and 2019, there were no commercial TDR Loans which were classified as TDR Loans during the previous 12 months which subsequently became 90 days or greater contractually delinquent. Commercial Loan Credit Quality Indicators The following credit quality indicators are utilized to monitor our commercial loan portfolio: Criticized loans Criticized loan classifications presented in the table below are determined by the assignment of various criticized facility grades based on the risk rating standards of our regulator. The following facility grades are deemed to be criticized: Special Mention - generally includes loans that are protected by collateral and/or the credit worthiness of the customer, but are potentially weak based upon economic or market circumstances which, if not checked or corrected, could weaken our credit position at some future date. Substandard - includes loans that are inadequately protected by the underlying collateral and/or general credit worthiness of the customer. These loans present a distinct possibility that we will sustain some loss if the deficiencies are not corrected. Doubtful - includes loans that have all the weaknesses exhibited by substandard loans, with the added characteristic that the weaknesses make collection or liquidation in full of the recorded loan highly improbable. However, although the possibility of loss is extremely high, certain factors exist which may strengthen the credit at some future date, and therefore the decision to charge-off the loan is deferred. Loans graded as doubtful are required to be placed in nonaccrual status. The following table summarizes our criticized commercial loans, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Special mention $ — $ — $ 350 $ 487 $ 90 $ 259 $ — $ — $ 1,186 Substandard — 1 272 263 308 461 20 11 1,336 Doubtful — — 80 2 — 53 — — 135 Total real estate, including construction — 1 702 752 398 773 20 11 2,657 Business and corporate banking: Special mention — 1 91 60 26 274 173 — 625 Substandard — 18 36 9 3 226 424 8 724 Doubtful — — — 20 — 28 16 — 64 Total business and corporate banking — 19 127 89 29 528 613 8 1,413 Global banking: Special mention 8 — — — — 8 47 — 63 Substandard — — — — — 54 232 — 286 Doubtful — — — — — — 31 — 31 Total global banking 8 — — — — 62 310 — 380 Other commercial: Special mention — — — — — 7 — — 7 Substandard — — — — — — 40 — 40 Doubtful — — — — — — — — — Total other commercial — — — — — 7 40 — 47 Total commercial: Special mention 8 1 441 547 116 548 220 — 1,881 Substandard — 19 308 272 311 741 716 19 2,386 Doubtful — — 80 22 — 81 47 — 230 Total commercial $ 8 $ 20 $ 829 $ 841 $ 427 $ 1,370 $ 983 $ 19 $ 4,497 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Special mention $ — $ 306 $ 115 $ 171 $ 85 $ 437 $ — $ — $ 1,114 Substandard — 186 — 169 — 86 — — 441 Doubtful — — — — — — — — — Total real estate, including construction — 492 115 340 85 523 — — 1,555 Business and corporate banking: Special mention 17 71 43 32 10 390 600 48 1,211 Substandard 1 44 25 23 31 181 435 1 741 Doubtful — — — — — 41 57 — 98 Total business and corporate banking 18 115 68 55 41 612 1,092 49 2,050 Global banking: Special mention — — — — — 142 98 — 240 Substandard — — 48 — — 131 477 — 656 Doubtful — — — — — 82 160 — 242 Total global banking — — 48 — — 355 735 — 1,138 Other commercial: Special mention — — — — — 44 40 — 84 Substandard — — — — — 70 — — 70 Doubtful — — — — — — — — — Total other commercial — — — — — 114 40 — 154 Total commercial: Special mention 17 377 158 203 95 1,013 738 48 2,649 Substandard 1 230 73 192 31 468 912 1 1,908 Doubtful — — — — — 123 217 — 340 Total commercial $ 18 $ 607 $ 231 $ 395 $ 126 $ 1,604 $ 1,867 $ 49 $ 4,897 Nonperforming The following table summarizes the nonperforming status of our commercial loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Performing loans $ 969 $ 651 $ 2,436 $ 2,076 $ 593 $ 1,307 $ 46 $ 16 $ 8,094 Nonaccrual loans — 2 80 40 — 18 — — 140 Total real estate, including construction 969 653 2,516 2,116 593 1,325 46 16 8,234 Business and corporate banking: Performing loans 1,630 709 594 190 187 4,756 5,540 217 13,823 Nonaccrual loans — 4 14 30 51 1 34 — 134 Accruing loans contractually past due 90 days or more — — — — — — 1 — 1 Total business and corporate banking 1,630 713 608 220 238 4,757 5,575 217 13,958 Global banking: Performing loans 547 540 203 80 243 4,580 4,811 — 11,004 Nonaccrual loans — — — — — 40 65 — 105 Total global banking 547 540 203 80 243 4,620 4,876 — 11,109 Other commercial: Performing loans 589 552 451 174 110 1,045 3,574 — 6,495 Total other commercial 589 552 451 174 110 1,045 3,574 — 6,495 Total commercial: Performing loans 3,735 2,452 3,684 2,520 1,133 11,688 13,971 233 39,416 Nonaccrual loans — 6 94 70 51 59 99 — 379 Accruing loans contractually past due 90 days or more — — — — — — 1 — 1 Total commercial $ 3,735 $ 2,458 $ 3,778 $ 2,590 $ 1,184 $ 11,747 $ 14,071 $ 233 $ 39,796 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Performing loans $ 545 $ 3,775 $ 2,775 $ 1,368 $ 264 $ 1,594 $ 79 $ 20 $ 10,420 Nonaccrual loans — — 24 — — 20 — — 44 Total real estate, including construction 545 3,775 2,799 1,368 264 1,614 79 20 10,464 Business and corporate banking: Performing loans 1,079 606 253 275 151 3,485 7,145 322 13,316 Nonaccrual loans 1 15 12 60 1 3 71 — 163 Total business and corporate banking 1,080 621 265 335 152 3,488 7,216 322 13,479 Global banking: Performing loans 507 495 190 231 104 6,023 5,632 — 13,182 Nonaccrual loans — — — — — 127 210 — 337 Total global banking 507 495 190 231 104 6,150 5,842 — 13,519 Other commercial: Performing loans 378 431 215 105 119 630 2,259 — 4,137 Total other commercial 378 431 215 105 119 630 2,259 — 4,137 Total commercial: Performing loans 2,509 5,307 3,433 1,979 638 11,732 15,115 342 41,055 Nonaccrual loans 1 15 36 60 1 150 281 — 544 Total commercial $ 2,510 $ 5,322 $ 3,469 $ 2,039 $ 639 $ 11,882 $ 15,396 $ 342 $ 41,599 Credit risk profile Commercial loans are assigned a credit rating based on the estimated probability of default. Investment grade includes loans with credit ratings of at least BBB- or above or the equivalent based on our internal credit rating system. The following table summarizes the credit risk profile of our commercial loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Investment grade $ 1 $ 361 $ 491 $ 772 $ 57 $ 248 $ 12 $ — $ 1,942 Non-investment grade 968 292 2,025 1,344 536 1,077 34 16 6,292 Total real estate, including construction 969 653 2,516 2,116 593 1,325 46 16 8,234 Business and corporate banking: Investment grade 881 254 240 52 43 2,122 2,498 55 6,145 Non-investment grade 749 459 368 168 195 2,635 3,077 162 7,813 Total business and corporate banking 1,630 713 608 220 238 4,757 5,575 217 13,958 Global banking: Investment grade 530 539 189 64 235 3,910 4,240 — 9,707 Non-investment grade 17 1 14 16 8 710 636 — 1,402 Total global banking 547 540 203 80 243 4,620 4,876 — 11,109 Other commercial: Investment grade 120 442 153 174 69 943 3,527 — 5,428 Non-investment grade 469 110 298 — 41 102 47 — 1,067 Total other commercial 589 552 451 174 110 1,045 3,574 — 6,495 Total commercial: Investment grade 1,532 1,596 1,073 1,062 404 7,223 10,277 55 23,222 Non-investment grade 2,203 862 2,705 1,528 780 4,524 3,794 178 16,574 Total commercial $ 3,735 $ 2,458 $ 3,778 $ 2,590 $ 1,184 $ 11,747 $ 14,071 $ 233 $ 39,796 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Investment grade $ 339 $ 1,123 $ 817 $ 318 $ 179 $ 640 $ 6 $ — $ 3,422 Non-investment grade 206 2,652 1,982 1,050 85 974 73 20 7,042 Total real estate, including construction 545 3,775 2,799 1,368 264 1,614 79 20 10,464 Business and corporate banking: Investment grade 342 147 37 34 23 1,486 2,499 47 4,615 Non-investment grade 738 474 228 301 129 2,002 4,717 275 8,864 Total business and corporate banking 1,080 621 265 335 152 3,488 7,216 322 13,479 Global banking: Investment grade 464 477 46 231 30 4,618 4,281 — 10,147 Non-investment grade 43 18 144 — 74 1,532 1,561 — 3,372 Total global banking 507 495 190 231 104 6,150 5,842 — 13,519 Other commercial: Investment grade 372 163 117 105 116 525 1,932 — 3,330 Non-investment grade 6 268 98 — 3 105 327 — 807 Total other commercial 378 431 215 105 119 630 2,259 — 4,137 Total commercial: Investment grade 1,517 1,910 1,017 688 348 7,269 8,718 47 21,514 Non-investment grade 993 3,412 2,452 1,351 291 4,613 6,678 295 20,085 Total commercial $ 2,510 $ 5,322 $ 3,469 $ 2,039 $ 639 $ 11,882 $ 15,396 $ 342 $ 41,599 Consumer Loan Credit Quality Indicators The following credit quality indicators are utilized to monitor our consumer loan portfolio: Delinquency The following table summarizes dollars of two-months-and-over contractual delinquency for our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages (1)(2) $ 5 $ 2 $ 11 $ 13 $ 8 $ 64 $ — $ 103 Home equity mortgages (1)(2) — — — — — 1 — 1 Credit cards — — — — — — 3 3 Other consumer — — — — — — — — Total consumer $ 5 $ 2 $ 11 $ 13 $ 8 $ 65 $ 3 $ 107 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages (1)(2) $ 3 $ 15 $ 13 $ 25 $ 19 $ 329 $ — $ 404 Home equity mortgages (1)(2) — — — — — 25 — 25 Credit cards — — — — — — 28 28 Other consumer 1 1 — — — 4 2 8 Total consumer $ 4 $ 16 $ 13 $ 25 $ 19 $ 358 $ 30 $ 465 (1) At December 31, 2021 and 2020, consumer mortgage loan delinquency includes $24 million and $281 million, respectively, of loans that are carried at the lower of amortized cost or fair value of the collateral less cost to sell. (2) At December 31, 2021 and 2020, consumer mortgage loans include $87 million and $109 million, respectively, of loans that were in the process of foreclosure. Nonperforming The following table summarizes the nonperforming status of our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages: Performing loans $ 4,496 $ 3,296 $ 1,481 $ 851 $ 955 $ 4,161 $ — $ 15,240 Nonaccrual loans 2 9 15 21 14 168 — 229 Total residential mortgages 4,498 3,305 1,496 872 969 4,329 — 15,469 Home equity mortgages: Performing loans 15 30 30 18 17 206 — 316 Nonaccrual loans — — — — — 9 — 9 Total home equity mortgages 15 30 30 18 17 215 — 325 Credit cards: Performing loans — — — — — — 202 202 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total credit cards — — — — — — 204 204 Other consumer: Performing loans 8 8 5 1 1 45 2 70 Total other consumer 8 8 5 1 1 45 2 70 Total consumer: Performing loans 4,519 3,334 1,516 870 973 4,412 204 15,828 Nonaccrual loans 2 9 15 21 14 177 — 238 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total consumer $ 4,521 $ 3,343 $ 1,531 $ 891 $ 987 $ 4,589 $ 206 $ 16,068 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages: Performing loans $ 4,491 $ 2,369 $ 1,338 $ 1,572 $ 1,852 $ 5,676 $ — $ 17,298 Nonaccrual loans 38 107 93 86 78 677 — 1,079 Total residential mortgages 4,529 2,476 1,431 1,658 1,930 6,353 — 18,377 Home equity mortgages: Performing loans 50 51 33 34 45 451 — 664 Nonaccrual loans — — 1 1 2 59 — 63 Total home equity mortgages 50 51 34 35 47 510 — 727 Credit cards: Performing loans — — — — — — 1,047 1,047 Accruing loans contractually past due 90 days or more — — — — — — 19 19 Total credit cards — — — — — — 1,066 1,066 Other consumer: Performing loans 87 39 — 1 8 128 54 317 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total other consumer 87 39 — 1 8 128 56 319 Total consumer: Performing loans 4,628 2,459 1,371 1,607 1,905 6,255 1,101 19,326 Nonaccrual loans 38 107 94 87 80 736 — 1,142 Accruing loans contractually past due 90 days or more — — — — — — 21 21 Total consumer $ 4,666 $ 2,566 $ 1,465 $ 1,694 $ 1,985 $ 6,991 $ 1,122 $ 20,489 Troubled debt restructurings The following table summarizes TDR Loans in our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages $ — $ 1 $ 3 $ 3 $ — $ 118 $ — $ 125 Home equity mortgages — — — — — 9 — 9 Credit cards — — — — — — 3 3 Total consumer $ — $ 1 $ 3 $ 3 $ — $ 127 $ 3 $ 137 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages $ 3 $ 5 $ 6 $ 3 $ 2 $ 563 $ — $ 582 Home equity mortgages — — — — — 31 — 31 Credit cards — — — — — — 5 5 Total consumer $ 3 $ 5 $ 6 $ 3 $ 2 $ 594 $ 5 $ 618 Concentration of Credit Risk At December 31, 2021 and 2020, our loan portfolios included interest-only residential mortgage and home equity mortgage loans totaling $3,739 million and $3,597 million, respectively. An interest-only residential mortgage loan allows a customer to pay the interest-only portion of the monthly payment for a period of time which results in lower payments during the initial loan period. However, subsequent events affecting a customer's financial position could affect the ability of customers to repay the loan in the future when the principal payments are required which increases the credit risk of this loan type.

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2021
Credit Loss [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses As discussed further in Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," beginning January 1, 2020, an allowance for credit losses is recognized based on lifetime ECL for loans, securities held-to-maturity and certain other financial assets measured at amortized cost, and an allowance for credit losses is also recognized for securities available-for-sale. Prior to January 1, 2020, an allowance for credit losses was recognized based on probable incurred losses for loans only while debt securities were assessed for other-than-temporary impairment. In addition, beginning January 1, 2020, the liability for off-balance sheet credit exposures is recognized based on lifetime ECL while, prior to January 1, 2020, it was recognized based on probable incurred losses. The new guidance also requires inclusion of expected recoveries of amounts previously written off, limited to the cumulative amount of prior write-offs, when estimating the allowance for credit losses for in scope financial assets (including collateral-dependent assets). Prior to January 1, 2020, these expected recoveries were not recognized. Description of Economic Scenarios at December 31, 2021 and Other Changes During the Year Ended December 31, 2021 Although economic conditions improved during 2021, the impact of the COVID-19 pandemic continues to create uncertainty about the future economic environment. As a result, we updated our three Consensus Economic Scenarios and our Alternative Downside scenario to reflect management's current view of forecasted economic conditions and utilized the four updated scenarios for estimating lifetime ECL at December 31, 2021. Each of the four scenarios were assigned weightings with the majority of the weighting placed on the Central scenario, lower equal weights placed on the Downside and Alternative Downside scenarios, and the lowest weighting placed on the Upside scenario. This weighting was deemed appropriate for the estimation of lifetime ECL under current conditions. The following discussion summarizes the Central, Upside, Downside and Alternative Downside scenarios at December 31, 2021. The economic assumptions described in this section have been formed specifically for the purpose of calculating ECL. In the Central scenario , GDP maintains its strong recovery path and carries its expansion into 2022, under the assumption that economic activities continue to grow while impact from new COVID-19 infections subsides. With a strong economic recovery, the unemployment rate continues on its downward trend, while demand for housing, combined with limited supply, continues to drive the residential housing market to carry its growth momentum into 2022. Commercial real estate prices continue the recent trend of appreciation, after a period of sluggish growth driven by pandemic induced adjustments. In the financial markets, growth in financial asset prices remains moderate, the federal funds rate remains at the current near-zero level until mid-2022, and the 10-year U.S. Treasury yield continues to rise. In the Upside scenario , the economy is assumed to grow at a faster pace than in the Central scenario. As a result, the unemployment rate falls faster than in the Central scenario and, both commercial and residential real estate prices grow at faster rates than in the Central Scenario. In this scenario, the equity price index climbs with strong momentum, and overall optimism allows the Federal Reserve Board ("FRB") to start normalizing monetary policy earlier than currently anticipated, which consequently drives the 10-year U.S. Treasury yield to a level that is substantially higher than in the Central Scenario. In the Downside scenario , the economy stagnates, with the unemployment rate reversing its downward trend and remaining at a higher level. In this scenario, the residential housing market slowly loses its momentum in 2022 due to weakness in the labor market, and the commercial real estate market suffers a heavier deceleration than the residential housing market. The equity price index in this scenario loses about half of its value by the middle of 2023, driven by an overall erosion of consumer and business sentiments, which also results in a lower 10-year U.S. Treasury yield than in the Central Scenario, and the federal funds rate remains at the lowest level for the next two years. In the Alternative Downside scenario , the U.S. economy re-enters into a recession in early 2022 and stays in until mid-2023, followed by a very anemic recovery thereafter. An extended period of economic contraction keeps the unemployment rate at a very high level, which pressures residential housing prices to fall moderately, while at the same time, contracting corporate activities and rising unemployment pushes the commercial real estate market into a severe downturn. In this scenario, financial markets experience a major sell-off and volatility in the financial markets remains extremely high over the next year, widening corporate credit spreads substantially, and flight to safe haven assets pushes the 10-year U.S. Treasury yield lower. The following table presents the forecasted key macroeconomic variables in our Central scenarios used for estimating lifetime ECL at December 31, 2021 and December 31, 2020: For the Quarter Ended June 30, 2022 December 31, 2022 Unemployment rate (quarterly average): Forecast at December 31, 2021 4.3 % 4.0 % Forecast at December 31, 2020 5.9 5.4 GDP growth rate (year-over-year): Forecast at December 31, 2021 4.1 2.8 Forecast at December 31, 2020 3.1 1.8 In addition to the updates to the economic scenarios, we decreased the management judgment allowance on our commercial loan portfolio for risk factors associated with economic uncertainty, large loan exposures and higher risk industry exposures that are not fully captured in the models. The decrease for risk factors associated with higher risk industry exposures reflects the transfer of certain commercial real estate loans to held for sale during the third quarter of 2021, which resulted in the reversal of the existing allowance for credit losses on these loans totaling $24 million. We also decreased the management judgment allowance on our consumer loan portfolio for risk factors associated with economic uncertainty and forbearance accounts that are not fully captured in the models. The decrease in the management judgment allowance on our consumer loan portfolio reflects the transfers of certain loans to held for sale. As previously disclosed, during the second quarter of 2021, we made the decision to exit our mass market retail banking business as well as our remaining retail credit card portfolio which resulted in the transfer of certain loans to held for sale and the reversal or charge-off of the existing allowances for credit losses on these loans which collectively totaled $157 million. During the fourth quarter of 2021, a portfolio of Premier credit cards was transferred back to held for investment which resulted in an increase in the allowance for credit losses of $14 million. During the fourth quarter of 2021, we also transferred certain non-performing mortgage loans and government-backed mortgage loans to held for sale which resulted in the reversal of the existing allowance for expected recoveries on these loans totaling $22 million. While we believe that the assumptions used in our credit loss models are reasonable within the parameters for which the models have been built and calibrated to operate, the severe projections of macro-economic variables during the current COVID-19 pandemic represent events outside the parameters for which the models have been built. As a result, adjustments to model outputs to reflect consideration of management judgment are used with stringent governance in place to ensure an appropriate lifetime ECL estimate. The circumstances around the COVID-19 pandemic are evolving and will continue to impact our business and our allowance for credit losses in future periods. The details of how various U.S. Government actions will impact our customers and therefore the impact on our allowance for credit losses remains uncertain. We will continue to monitor the COVID-19 situation closely and will continue to adapt our Consensus Economic Scenarios approach as necessary to reflect management's current view of forecasted economic conditions. Allowance for Credit Losses / Liability for Off-Balance Sheet Credit Exposures The following table summarizes our allowance for credit losses and the liability for off-balance sheet credit exposures: At December 31, 2021 2020 (in millions) Allowance for credit losses: Loans $ 447 $ 1,015 Securities held-to-maturity (1) 1 2 Other financial assets measured at amortized cost (2) 1 2 Securities available-for-sale (1) 1 1 Total allowance for credit losses $ 450 $ 1,020 Liability for off-balance sheet credit exposures $ 103 $ 237 (1) See Note 6, "Securities," for additional information regarding the allowance for credit losses associated with our security portfolios. (2) Primarily includes accrued interest receivables and customer acceptances. The following table summarizes the changes in the allowance for credit losses on loans by product or line of business during the years ended December 31, 2021, 2020 and 2019: Commercial Loans Consumer Loans Real Estate, including Construction Business Global Other Residential Home Credit Other Total Loans (in millions) Year Ended December 31, 2021 Allowance for credit losses – beginning of period $ 145 $ 375 $ 287 $ 7 $ (9) $ 22 $ 161 $ 27 $ 1,015 Provision charged (credited) to income (1) (72) (107) (174) (3) 21 (18) (66) (18) (437) Charge-offs (1) — (29) (13) — (19) (5) (89) (10) (165) Recoveries — 4 — — 15 6 8 1 34 Net (charge-offs) recoveries — (25) (13) — (4) 1 (81) (9) (131) Allowance for credit losses – end of period $ 73 $ 243 $ 100 $ 4 $ 8 $ 5 $ 14 $ — $ 447 Year Ended December 31, 2020 Allowance for credit losses – beginning of period $ 153 $ 239 $ 106 $ 9 $ 12 $ 6 $ 105 $ 7 $ 637 Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses (2) (112) (60) 51 (5) (86) 7 32 3 (170) Allowance for credit losses – beginning of period, adjusted 41 179 157 4 (74) 13 137 10 467 Provision charged (credited) to income 116 274 149 2 55 6 107 27 736 Charge-offs (12) (90) (20) — (2) (3) (90) (11) (228) Recoveries — 12 1 1 12 6 7 1 40 Net (charge-offs) recoveries (12) (78) (19) 1 10 3 (83) (10) (188) Allowance for credit losses – end of period $ 145 $ 375 $ 287 $ 7 $ (9) $ 22 $ 161 $ 27 $ 1,015 Year Ended December 31, 2019 Allowance for credit losses – beginning of period $ 116 $ 219 $ 108 $ 15 $ 13 $ 7 $ 58 $ 5 $ 541 Provision charged (credited) to income 37 62 1 (6) (3) (2) 101 5 195 Charge-offs — (45) (3) — (8) (4) (60) (5) (125) Recoveries — 3 — — 10 5 6 2 26 Net (charge-offs) recoveries — (42) (3) — 2 1 (54) (3) $ (99) Allowance for credit losses – end of period $ 153 $ 239 $ 106 $ 9 $ 12 $ 6 $ 105 $ 7 $ 637 (1) For loans that are transferred to held for sale, the existing allowance for credit losses at the time of transfer is recognized as a charge-off to the extent fair value is less than amortized cost and attributable to credit. Any remaining allowance for credit losses is released to the provision for credit losses. During the second quarter of 2021, we made the decision to exit our mass market retail banking business as well as our remaining retail credit card portfolio which resulted in the transfer of certain loans to held for sale. As a result of transferring these loans to held for sale, we recognized $56 million of the existing allowance for credit losses on consumer loans as charge-offs, primarily related to non-performing credit cards, and released $100 million of the existing allowance for credit losses on consumer loans as reductions to the provision for credit losses, primarily related to credit cards. The existing commercial allowance for credit losses on the retail business banking loan portfolio transferred to held for sale was not material. See Note 4, "Branch Assets and Liabilities Held for Sale." During the fourth quarter of 2021, a portfolio of Premier credit cards was transferred back to held for investment which resulted in increases to the allowance for credit losses and provision for credit losses of $14 million. During the third quarter of 2021, we transferred certain commercial real estate loans to held for sale and, as a result, we released $24 million of the existing allowance for credit losses as a reduction to the provision for credit losses. During the fourth quarter of 2021, we also transferred certain non-performing mortgage loans and government-backed mortgage loans to held for sale. As a result, we recognized $4 million of the existing allowance for credit losses as charge-offs and released $22 million of the existing allowance for expected recoveries on these loans as an increase to the provision for credit losses. (2) Reflects the adoption of new accounting guidance in 2020 as discussed above. In addition, see Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion. The following table summarizes the changes in the liability for off-balance sheet credit exposures during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in millions) Balance at beginning of period $ 237 $ 104 $ 96 Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses (1) — 54 — Balance at beginning of period, adjusted 237 158 96 Provision charged (credited) to income (134) 79 8 Balance at end of period $ 103 $ 237 $ 104 (1) Reflects the adoption of new accounting guidance in 2020 as discussed above. In addition, see Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion. Accrued Interest Receivables The following table summarizes accrued interest receivables associated with financial assets carried at amortized cost and securities available-for-sale along with the related allowance for credit losses, which are reported net in other assets on the consolidated balance sheet. These accrued interest receivables are excluded from the amortized cost basis disclosures presented elsewhere in these financial statements, including Note 6, "Securities," and Note 7, "Loans." At December 31, 2021 2020 (in millions) Accrued interest receivables: Loans $ 109 $ 140 Securities held-to-maturity 13 23 Other financial assets measured at amortized cost 1 1 Securities available-for-sale 82 100 Total accrued interest receivables 205 264 Allowance for credit losses 1 2 Accrued interest receivables, net $ 204 $ 262 During 2021 and 2020, we charged-off accrued interest receivables by reversing interest income for loans of $5 million and $7 million, respectively.

Loans Held for Sale

Loans Held for Sale	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Loans Held for Sale	Loans Held for Sale Loans held for sale consisted of the following: At December 31, 2021 2020 (in millions) Commercial loans: Real estate, including construction $ — $ 10 Business and corporate banking 123 — Global banking 338 119 Total commercial 461 129 Consumer loans: Residential mortgages 3,082 208 Home equity mortgages 275 — Credit cards 195 — Other consumer 204 — Total consumer 3,756 208 Total loans held for sale $ 4,217 $ 337 Commercial Loans During the second quarter of 2021, as part of our Restructuring Plan we made the decision to exit our mass market retail banking business. See Note 4, "Branch Assets and Liabilities Held for Sale," for additional information. As a result, during the second quarter of 2021, we transferred our retail business banking loan portfolio to held for sale with a carrying value of $149 million. The lower of amortized cost or fair value adjustment upon transferring these loans to held for sale was not material. At December 31, 2021, the carrying value of these loans was $79 million. Also included in commercial loans held for sale are certain other loans that we no longer intend to hold for investment and were transferred to held for sale which totaled $359 million and $93 million at December 31, 2021 and 2020, respectively. During 2021, 2020 and 2019, we recorded $7 million, $23 million and nil, respectively, of lower of amortized cost or fair value adjustments associated with the write-down of these commercial loans held for sale as a component of other income (loss) in the consolidated statement of income (loss). During the fourth quarter of 2021, we sold a portfolio of commercial real estate loans to a third-party sponsored asset-backed financing entity with a carrying value of $1,032 million at the time of sale and recognized an immaterial loss on sale, including transaction costs. These commercial real estate loans were transferred to held for sale during the third quarter of 2021 as part of an effort to reduce exposure to this sector and improve returns on risk-weighted assets. There was no lower of amortized cost or fair value adjustment recorded upon transferring these loans to held for sale. In connection with the sale, we provided a loan to the third-party buyer sponsored asset-backed financing entity for a portion of the purchase price. See Note 27, "Variable Interest Entities," for additional information. In addition, commercial loans held for sale includes certain loans that we have elected to designate under the fair value option which consists of loans that we originate in connection with our participation in a number of syndicated credit facilities with the intent of selling them to unaffiliated third parties as well as loans that we purchase from the secondary market and hold as hedges against our exposure to certain total return swaps. The fair value of these loans totaled $23 million and $36 million at December 31, 2021 and 2020, respectively. See Note 17, "Fair Value Option," for additional information. Consumer Loans As discussed above, during the second quarter of 2021, as part of our Restructuring Plan we made the decision to exit our mass market retail banking business as well as our remaining retail credit card portfolio. As a result, during the second quarter of 2021, we transferred certain consumer loans to held for sale, including loans related to the branch disposal group, with a carrying value which collectively totaled $3,616 million, including $2,364 million of residential mortgages, $265 million of home equity mortgages, $829 million of credit cards and $158 million of other consumer loans. There was no lower of amortized cost or fair value adjustment recorded upon transferring these loans to held for sale. During the second half of 2021, we recorded $7 million of lower of amortized cost or fair value adjustments on these consumer loans held for sale as a component of other income (loss) in the consolidated statement of income (loss) as a result of a reduction in the estimated pricing on specific pools of loans. During the fourth quarter of 2021, consistent with our Restructuring Plan, we identified additional consumer loans that we no longer have the intent to hold for investment, consisting primarily of certain non-performing mortgage loans and government-backed mortgage loans as well as our remaining student loans. As a result, during the fourth quarter of 2021, we transferred loans to held for sale with a carrying value which collectively totaled $778 million, including related escrow advances. The lower of amortized cost or fair value adjustment upon transferring these loans to held for sale was not material. At December 31, 2021, the carrying value of these transferred loans totaled $3,681 million, including $3,007 million of residential mortgages, $275 million of home equity mortgages, $195 million of credit cards and $204 million of other consumer loans (of which $25 million are student loans that we have previously elected to designate under the fair value option and are therefore carried at fair value). During the fourth quarter of 2021, we sold a portfolio of mass market retail credit cards to a third party with a carrying value of $382 million at the time of sale and recognized a gain on sale of approximately $9 million, net of transaction costs. Under the terms of the sale agreement, we will continue to service the portfolio for a period of time not anticipated to exceed one year. Upon completion of the sale, a portfolio of Premier credit cards with a carrying value of $204 million was transferred back to held for investment as we now intend to hold these loans for the foreseeable future. These credit card portfolios were transferred to held for sale during the second quarter of 2021 as discussed above, but were not included in the branch disposal group. Also included in residential mortgage loans held for sale are agency-eligible conforming residential mortgage loans which are originated and held for sale to third parties, currently on a servicing retained basis. Gains and losses from the sale of these residential mortgage loans are reflected as a component of other income (loss) in the consolidated statement of income (loss). Loans held for sale are subject to market risk, liquidity risk and interest rate risk, in that their value will fluctuate as a result of changes in market conditions, as well as the credit environment. Interest rate risk for residential mortgage loans which are originated and held for sale is partially mitigated through an economic hedging program to offset changes in the fair value of these mortgage loans held for sale, from the time of commitment to sale, attributable to changes in market interest rates. Revenue associated with this economic hedging program, which is reflected as a component of other income (loss) in the consolidated statement of income (loss), was losses of $2 million, $6 million and $1 million during 2021, 2020 and 2019, respectively. Valuation Allowances Excluding the loans designated under the fair value option discussed above, loans held for sale are recorded at the lower of amortized cost or fair value, with adjustments to fair value being recorded as a valuation allowance through other revenues. The valuation allowance on consumer loans held for sale was $7 million and nil at December 31, 2021 and 2020, respectively. The valuation allowance on commercial loans held for sale was $5 million and $1 million at December 31, 2021 and 2020, respectively.

Properties and Equipment, Net

Properties and Equipment, Net	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Properties and Equipment, Net	Properties and Equipment, Net Properties and equipment, net is summarized in the following table: At December 31, 2021 2020 (in millions) Land $ 2 $ 5 Buildings and improvements (1) 291 543 Furniture and equipment (1) 67 129 Total 360 677 Accumulated depreciation and amortization (1) (320) (533) Properties and equipment, net $ 40 $ 144 (1) The decreases since December 31, 2020 are due primarily to the impact of our decision to exit our mass market retail banking business which resulted in the transfer of assets to other branch related assets held for sale during the second quarter of 2021 as well as the retirement of assets associated with certain branches and office space which we exited in 2021 as part of our Restructuring Plan. See Note 3, "Strategic Initiatives," and Note 4, "Branch Assets and Liabilities Held for Sale," for further discussion. During 2020, we also recognized $18 million of gains on sales of certain owned retail branch properties. These gains are reflected in other income (loss) in the consolidated statement of income (loss) and were reported in the Corporate Center business segment. Depreciation and amortization expense totaled $22 million, $34 million and $43 million in 2021, 2020 and 2019, respectively.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill was $458 million at both December 31, 2021 and 2020. Goodwill for these periods reflects accumulated impairment losses of $1,819 million, which were recognized in prior periods. During the fourth quarter of 2021, we completed our annual impairment test of goodwill and determined that the fair value of our Commercial Banking reporting unit exceeded its carrying value, including goodwill. During 2020, as a result of the deterioration in economic conditions caused by the spread of the COVID-19 pandemic and its impact on our businesses including changes to the interest rate environment as a result of FRB actions to combat the economic effects of the virus, we performed an interim impairment test of goodwill and determined that the fair value of our Commercial Banking reporting unit exceeded its carrying value, including goodwill. However, the cash flow projections for our previously separate Retail Banking and Wealth Management and our Private Banking reporting units were significantly lower than previous estimates which, in conjunction with valuation estimates under a market approach and in consideration of a challenging macroeconomic outlook, resulted in a fair value that was significantly lower than their book values, including goodwill. As a result, we recorded a non-cash impairment charge of $784 million in 2020, representing the entire amount of goodwill previously allocated to these reporting units. During 2019, we completed our annual impairment test of goodwill and determined that the fair value of our Commercial Banking and Private Banking reporting units exceeded or approximated their carrying values, including goodwill. However, the cash flow projections for our Retail Banking and Wealth Management reporting unit were significantly lower than previous estimates due to changes in circumstances at that time, in particular changes to the interest rate environment as a result of slowing economic growth along with various revenue headwinds such as increased competition for deposits and a shift in demand to lower fee wealth products, as well as higher levels of allocated capital which, in conjunction with valuation estimates determined under a market approach, resulted in a fair value that was significantly lower than its book value, including goodwill. As a result, we recorded a non-cash impairment charge of $365 million, representing a portion of the $737 million of goodwill previously allocated to this reporting unit.

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	Leases We have entered into operating leases for premises and equipment. The following table summarizes the components of total operating lease costs, net and provides supplemental cash flow information related to leases: Year Ended December 31, 2021 2020 2019 (in millions) Operating lease cost $ 87 $ 127 $ 136 Variable lease cost 48 59 63 Short-term lease cost — — 4 Sublease income (1) (43) (54) (60) Total operating lease costs, net $ 92 $ 132 $ 143 Supplemental disclosure of cash flow information: Cash paid for amounts included in the measurement of operating lease liabilities $ 129 $ 135 $ 126 ROU assets recognized for new operating lease liabilities — 24 132 (1) We have entered into agreements to sublease certain office space, including agreements to receive rental income from our affiliates. As owner or lessee of the properties, we have entered into agreements with these affiliates to charge them rent based on the office space utilized by their employees during the period. See Note 24, "Related Party Transactions," for further disclosure. In addition to the operating lease costs reflected in the table above, during 2021 and 2020, we recorded lease impairment charges of $63 million and $76 million, respectively, to write-down the lease ROU assets associated with certain branches and office space that we determined we would exit as part of our Restructuring Plan. See Note 3, "Strategic Initiatives," for further discussion. During 2019, we determined that we would exit approximately 20 branches and, as a result, we recorded lease impairment charges of $13 million to write-down the lease ROU assets associated with these branches based on their estimated remaining useful lives. These impairment charges are reflected in occupancy expense, net in the consolidated statement of income (loss) and were reported in the Wealth and Personal Banking and the Corporate Center business segment. The following table presents information about our operating lease ROU assets and liabilities: At December 31, 2021 2020 (dollars are in millions) Operating lease ROU assets (1)(2) $ 181 $ 527 Operating lease liabilities (2) 305 625 Weighted-average remaining lease term 6.7 years 6.8 years Weighted-average discount rate 3.0 % 3.0 % (1) Reported net of level lease adjustments and accumulated impairment losses. (2) The decreases since December 31, 2020 include the impact of our decision to exit our mass market retail banking business which resulted in the transfer of lease ROU assets and lease liabilities to other branch related assets held for sale and other branch related liabilities held for sale during the second quarter of 2021. See Note 4, "Branch Assets and Liabilities Held for Sale," for further discussion. The following table presents a maturity analysis of our operating lease liabilities at December 31, 2021: Year Ending December 31, (in millions) 2022 $ 79 2023 78 2024 70 2025 35 2026 15 Thereafter 65 Total future operating lease payments 342 Less - imputed interest (37) Total operating lease liabilities $ 305 At December 31, 2021, additional operating leases for premises that have not yet commenced and are not reflected in the table above were not material.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Deposits	Deposits Total deposits were $143,032 million and $145,150 million at December 31, 2021 and 2020, respectively, of which $2,749 million and $4,155 million, respectively, were carried at fair value. At December 31, 2021, total deposits include $8,750 million of deposits classified as held for sale. The following table presents the aggregate amount of time deposit accounts in denominations exceeding $250,000 at December 31, 2021 and 2020: At December 31, 2021 2020 (in millions) Domestic deposits $ 6,140 $ 14,270 Foreign deposits 265 232 Total $ 6,405 $ 14,502 The scheduled maturities of all time deposits at December 31, 2021 are summarized in the following table: Domestic Deposits Foreign Deposits Total (in millions) 2022 $ 5,721 $ 265 $ 5,986 2023 541 — 541 2024 391 — 391 2025 315 — 315 2026 1,719 — 1,719 Thereafter 558 — 558 $ 9,245 $ 265 $ 9,510 During 2020, we recorded a $12 million gain on extinguishment of time deposits reflecting early client withdrawals. Overdraft deposits, which are classified as loans, were approximately $345 million and $392 million at December 31, 2021 and 2020, respectively. Federal Deposit Insurance Corporation ("FDIC") assessment fees, which are recorded as a component of other expenses in the consolidated statement of income (loss), totaled $63 million, $71 million and $24 million in 2021, 2020 and 2019, respectively.

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2021
Short-term Debt [Abstract]
Short-Term Borrowings	Short-Term Borrowings Short-term borrowings consisted of the following: December 31, 2021 Rate 2020 Rate (dollars are in millions) Securities sold under repurchase agreements $ 2,315 .05 % $ 1,765 .22 % Commercial paper 3,683 .36 2,998 .52 Other 340 189 Total short-term borrowings $ 6,338 $ 4,952 During 2019, we recorded a loss of $14 million on extinguishment of certain repurchase agreements.

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2021
Long-term Debt, Unclassified [Abstract]
Long-term Debt	Long-Term Debt The composition of long-term debt is presented in the following table. Interest rates on floating rate notes are determined periodically by formulas based on certain money market rates or, in certain instances, by minimum interest rates as specified in the agreements governing the issues. Interest rates and maturity dates in effect at December 31, 2021 are shown in the below table. At December 31, Maturity Date Interest Rate Interest Rate 2021 2020 (in millions) Issued or acquired by HSBC USA: Senior debt: Fixed-rate notes 2024 - 2030 1.12% - 4.20% 2.63% $ 6,347 $ 2,990 Structured notes 2022 - 2045 .13 - 2.51 .62 6,346 7,938 Total senior debt 12,693 10,928 Subordinated debt: Fixed-rate notes 2097 7.20 7.20 222 422 Floating-rate notes (1) — 850 Total subordinated debt 222 1,272 Mark-to-market adjustment on fair value option debt 1,145 1,344 Total issued or acquired by HSBC USA 14,060 13,544 Issued or acquired by HSBC Bank USA and its subsidiaries: Senior debt: Floating-rate notes 2024 - 2040 .02 - .91 .31 25 42 Structured notes 2022 - 2028 (.08) - 3.04 1.22 488 394 FHLB advances - fixed-rate — 3,250 FHLB advances - floating-rate 2036 .23 .23 1,000 1,000 Total senior debt 1,513 4,686 Subordinated fixed-rate notes 2034 - 2039 5.63 - 7.00 6.36 1,441 1,441 Mark-to-market adjustment on fair value option debt 222 308 Total issued or acquired by HSBC Bank USA and its subsidiaries 3,176 6,435 Total long-term debt $ 17,236 $ 19,979 (1) During 2021, $850 million of floating-rate subordinated debt with HSBC North America was called and repaid. At December 31, 2021 and 2020, we had structured notes totaling $7,997 million and $9,695 million, respectively, and subordinated debt totaling $945 million and $1,030 million, respectively, for which we have elected fair value option accounting and are therefore carried at fair value. See Note 17, "Fair Value Option," for further details. During 2019, HSBC Bank USA repurchased $1,269 million of its outstanding subordinated debt that was designated under fair value option and recorded a net pre-tax gain on extinguishment of $84 million. As a member of the FHLB and the Federal Reserve Bank of New York, we have secured borrowing facilities which are collateralized by loans and investment securities. At December 31, 2021 and 2020, borrowings from the FHLB facility totaled $1,000 million and $4,250 million, respectively, which is included in long-term debt. Based upon the amounts pledged as collateral under these facilities, we have additional borrowing capacity of up to $15,057 million at December 31, 2021. Maturities of long-term debt at December 31, 2021 were as follows: (in millions) 2022 $ 2,930 2023 1,593 2024 2,014 2025 4,474 2026 631 Thereafter 5,594 Total $ 17,236

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments In the normal course of business, the derivative instruments we enter into are for trading, market making and risk management purposes. For financial reporting purposes, derivative instruments are designated in one of the following categories: (a) hedging instruments designated as qualifying hedges under derivative and hedge accounting principles, (b) financial instruments held for trading or (c) non-qualifying economic hedges. The derivative instruments held are predominantly swaps, futures, options and forward contracts. All derivatives are stated at fair value. Where we enter into enforceable master netting agreements with counterparties, the master netting agreements permit us to net those derivative asset and liability positions and to offset cash collateral held and posted with the same counterparty. The following table presents the fair value of derivative contracts by major product type on a gross basis. Gross fair values exclude the effects of both counterparty netting as well as collateral, and therefore are not representative of our exposure. The table below also presents the amounts of counterparty netting and cash collateral that have been offset in the consolidated balance sheet, as well as cash and securities collateral posted and received under enforceable master netting agreements that do not meet the criteria for netting. Derivative assets and liabilities which are not subject to an enforceable master netting agreement, or are subject to a netting agreement where an appropriate legal opinion to determine such agreements are enforceable has not been either sought or obtained, have not been netted in the following table. Where we have received or posted collateral under netting agreements where an appropriate legal opinion to determine such agreements are enforceable has not been either sought or obtained, the related collateral also has not been netted in the following table. December 31, 2021 December 31, 2020 Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities (in millions) Derivatives accounted for as fair value hedges (1) Interest rate contracts - bilateral OTC (2) $ — $ 5 $ — $ 2 Derivatives accounted for as cash flow hedges (1) Foreign exchange contracts - bilateral OTC (2) 29 — — 53 Interest rate contracts - bilateral OTC (2) — 2 — — Total derivatives accounted for as hedges 29 7 — 55 Trading derivatives not accounted for as hedges (3) Exchange-traded (2) 8 10 14 9 OTC-cleared (2) 37 — — 58 Bilateral OTC (2) 1,756 1,877 6,584 6,555 Interest rate contracts (4) 1,801 1,887 6,598 6,622 OTC-cleared (2) — — 168 — Bilateral OTC (2) 11,321 11,125 18,299 18,549 Foreign exchange contracts 11,321 11,125 18,467 18,549 Equity contracts - bilateral OTC (2) 588 1,240 4,009 4,200 Exchange-traded (2) 4 — — 28 Bilateral OTC (2) 936 779 1,323 1,550 Precious metals contracts 940 779 1,323 1,578 Credit contracts - bilateral OTC (2) 28 25 367 233 Other non-qualifying derivatives not accounted for as hedges (1) Interest rate contracts - bilateral OTC (2) 47 5 89 1 Foreign exchange contracts - bilateral OTC (2) — 1 — 1 Equity contracts - bilateral OTC (2) 1,470 121 1,607 91 OTC-cleared (2) — 19 — 14 Bilateral OTC (2) — 38 — 50 Credit contracts — 57 — 64 Other contracts - bilateral OTC (2)(5) 5 38 8 67 Total derivatives 16,229 15,285 32,468 31,461 Less: Gross amounts of receivable / payable subject to enforceable master netting agreements (6)(8) 11,991 11,991 25,537 25,537 Less: Gross amounts of cash collateral received / posted subject to enforceable master netting agreements (7)(8) 2,797 1,296 4,079 3,377 Net amounts of derivative assets / liabilities presented in the balance sheet 1,441 1,998 2,852 2,547 Less: Gross amounts of financial instrument collateral received / posted subject to enforceable master netting agreements but not offset in the consolidated balance sheet 179 194 817 691 Net amounts of derivative assets / liabilities $ 1,262 $ 1,804 $ 2,035 $ 1,856 (1) Derivative assets / liabilities related to cash flow hedges, fair value hedges and derivative instruments held for purposes other than for trading are recorded in other assets / interest, taxes and other liabilities on the consolidated balance sheet. (2) Over-the-counter ("OTC") derivatives include derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. The credit risk associated with bilateral OTC derivatives is managed through obtaining collateral and enforceable master netting agreements. OTC-cleared derivatives are executed bilaterally in the OTC market but then novated to a central clearing counterparty, whereby the central clearing counterparty becomes the counterparty to each of the original counterparties. Exchange traded derivatives are executed directly on an organized exchange. Credit risk is minimized for OTC-cleared derivatives and exchange traded derivatives through daily margining requirements. In addition, OTC-cleared interest rate and credit derivatives with certain central clearing counterparties are settled daily. (3) Trading related derivative assets / liabilities are recorded in trading assets / trading liabilities on the consolidated balance sheet. (4) The decreases in interest rate derivative assets and liabilities at December 31, 2021 primarily reflects reduced positions driven by the exit or transfer of certain contracts as part of our Restructuring Plan. See Note 3, "Strategic Initiatives," for additional information. (5) Consists of swap agreements entered into in conjunction with the sales of Visa Inc. ("Visa") Class B common shares ("Class B Shares"). (6) Represents the netting of derivative receivable and payable balances for the same counterparty under enforceable netting agreements. (7) Represents the netting of cash collateral posted and received by counterparty under enforceable netting agreements. (8) Netting is performed at a counterparty level in cases where enforceable master netting agreements are in place, regardless of the type of derivative instrument. Therefore, we have not allocated netting to the different types of derivative instruments shown in the table above. See Note 28, "Guarantee Arrangements, Pledged Assets and Repurchase Agreements," for further information on offsetting related to resale and repurchase agreements. Derivatives Held for Risk Management Purposes Our risk management policy requires us to identify, analyze and manage risks arising from the activities conducted during the normal course of business. We use derivative instruments as an asset and liability management tool to manage our exposures in interest rate, foreign currency and credit risks in existing assets and liabilities, commitments and forecasted transactions. The accounting for changes in fair value of a derivative instrument will depend on whether the derivative has been designated and qualifies for hedge accounting. We designate derivative instruments to offset the fair value risk and cash flow risk arising from fixed-rate and floating-rate assets and liabilities as well as forecasted transactions. We assess the hedging relationships, both at the inception of the hedge and on an ongoing basis, using a regression approach to determine whether the designated hedging instrument is highly effective in offsetting changes in the fair value or the cash flows attributable to the hedged risk. Accounting principles for qualifying hedges require us to prepare detailed documentation describing the relationship between the hedging instrument and the hedged item, including, but not limited to, the risk management objective, the hedging strategy and the methods to assess and measure the ineffectiveness of the hedging relationship. We discontinue hedge accounting when we determine that the hedge is no longer highly effective, the hedging instrument is terminated, sold or expired, the designated forecasted transaction is not probable of occurring, or when the designation is removed by us. Fair Value Hedges In the normal course of business, we hold fixed-rate loans and securities, and issue fixed-rate deposits and senior and subordinated debt obligations. The fair value of fixed-rate assets and liabilities fluctuates in response to changes in interest rates. We utilize interest rate swaps, forward and futures contracts to minimize our exposure to changes in fair value caused by interest rate volatility. The changes in the fair value of the hedged item designated in a qualifying hedge are captured as an adjustment to the carrying amount of the hedged item (basis adjustment). If the hedging relationship is discontinued and the hedged item continues to exist, the basis adjustment is amortized over the remaining life of the hedged item. The following table presents the carrying amount of hedged items in fair value hedges recognized in the consolidated balance sheet at December 31, 2021 and 2020, along with the cumulative amount of fair value hedging adjustments included in the carrying amount of those hedged items: Carrying Amount of Hedged Items (1) Cumulative Amount of Fair Value Hedging Adjustments Increasing (Decreasing) the Active Discontinued Total (in millions) At December 31, 2021 Securities available-for-sale ("AFS") $ 7,919 $ (72) $ 1,010 $ 938 Deposits 1,598 (27) 125 98 Long-term debt 5,587 (61) 148 87 At December 31, 2020 Securities AFS 7,966 681 738 1,419 Deposits 5,214 214 — 214 Long-term debt 2,227 242 (15) 227 (1) The carrying amount of securities AFS represents the amortized cost basis. The following table presents information on gains and losses on derivative instruments designated and qualifying as hedging instruments and the hedged items in fair value hedges and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) on Derivatives Gain (Loss) on Hedged Items (in millions) Year Ended December 31, 2021 Interest rate contracts / Securities AFS Net interest income $ 129 $ (29) Interest rate contracts / Deposits Net interest income (49) (6) Interest rate contracts / Long-term debt Net interest income (30) (14) Total $ 50 $ (49) Year Ended December 31, 2020 Interest rate contracts / Securities AFS Net interest income $ (731) $ 900 Interest rate contracts / Deposits Net interest income 148 (261) Interest rate contracts / Long-term debt Net interest income 165 (261) Total $ (418) $ 378 Year Ended December 31, 2019 Interest rate contracts / Securities AFS Net interest income $ (776) $ 1,086 Interest rate contracts / Long-term debt Net interest income 235 (703) Total $ (541) $ 383 Cash Flow Hedges We own or issue floating rate financial instruments and enter into forecasted transactions that give rise to variability in future cash flows. As a part of our risk management strategy, we use interest rate swaps, currency swaps and futures contracts to mitigate risk associated with variability in the cash flows. Changes in fair value of a derivative instrument associated with a qualifying cash flow hedge are recognized in other comprehensive income (loss). When the cash flows being hedged materialize and are recorded in income or expense, the associated gain or loss from the hedging derivative previously recorded in accumulated other comprehensive income (loss) ("AOCI") is reclassified into earnings in the same accounting period in which the designated forecasted transaction or hedged item affects earnings. If a cash flow hedge of a forecasted transaction is discontinued because it is no longer highly effective, or if the hedge relationship is terminated, the cumulative gain or loss on the hedging derivative to that date will continue to be reported in AOCI unless it is probable that the hedged forecasted transaction will not occur by the end of the originally specified time period as documented at the inception of the hedge, at which time the cumulative gain or loss is released into earnings. At December 31, 2021, active cash flow hedge relationships extend or mature through July 2031. During 2021, $13 million of gains related to discontinued cash flow hedge relationships were amortized to earnings from AOCI compared with losses of $11 million and $35 million during 2020 and 2019, respectively. During the next twelve months, we expect to amortize $10 million of remaining losses to earnings resulting from these discontinued cash flow hedges. The interest accrual related to the hedging instruments is recognized in net interest income. The following table presents information on gains and losses on derivative instruments designated and qualifying as hedging instruments in cash flow hedges (including amounts recognized in AOCI from discontinued cash flow hedges) and their locations on the consolidated statement of income (loss): Gain (Loss) Recognized in Location of Gain (Loss) Gain (Loss) Reclassified From 2021 2020 2019 2021 2020 2019 (in millions) Year Ended December 31, Foreign exchange contracts $ (1) $ — $ 3 Net interest income $ — $ — $ — Interest rate contracts (64) 84 (27) Net interest income 13 (11) (35) Total $ (65) $ 84 $ (24) $ 13 $ (11) $ (35) Trading Derivatives and Non-Qualifying Hedging Activities In addition to risk management, we also enter into derivative contracts, including buy- and sell-protection credit derivatives, for the purposes of trading and market making, or repackaging risks to form structured trades to meet clients' risk taking objectives. Additionally, we buy or sell securities and use derivatives to mitigate the market risks arising from our trading activities with our clients that exceed our risk appetite. We also use buy-protection credit derivatives to manage our counterparty credit risk exposure. Where we enter into derivatives for trading purposes, realized and unrealized gains and losses are recognized in trading revenue. Counterparty credit risk associated with OTC derivatives, including risk-mitigating buy-protection credit derivatives, are recognized as an adjustment to the fair value of the derivatives and are recorded in trading revenue. Our non-qualifying hedging and other activities include: • Derivative contracts related to the fixed-rate long-term debt issuances and hybrid instruments, including all structured notes and deposits, for which we have elected fair value option accounting. These derivative contracts are non-qualifying hedges but are considered economic hedges. • Credit default swaps which are designated as economic hedges against the credit risks within our loan portfolio. In the event of an impairment loss occurring in a loan that is economically hedged, the impairment loss is recognized as provision for credit losses while the gain on the credit default swap is recorded as other income (loss). • Swap agreements entered into in conjunction with the sales of Visa Class B Shares to a third party to retain the litigation risk associated with the Class B Shares sold until the related litigation is settled and the Class B Shares can be converted into Class A common shares ("Class A Shares"). See Note 28, "Guarantee Arrangements, Pledged Assets and Repurchase Agreements," for additional information. • Forward purchases or sales of to-be-announced ("TBA") securities used to economically hedge changes in the fair value of residential mortgage loans which are originated and held for sale attributable to changes in market interest rates. Changes in the fair value of TBA positions, which are considered derivatives, are recorded in other income (loss). See Note 9, "Loans Held for Sale," for additional information. Derivative instruments designated as economic hedges that do not qualify for hedge accounting are recorded at fair value through profit and loss. Realized and unrealized gains and losses on economic hedges are recognized in gain (loss) on instruments designated at fair value and related derivatives or other income (loss) while the derivative asset or liability positions are reflected as other assets or other liabilities. The following table presents information on gains and losses on derivative instruments held for trading purposes and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) Recognized in Income on Derivatives Year Ended December 31, 2021 2020 2019 (in millions) Interest rate contracts Trading revenue $ (11) $ 396 $ (89) Foreign exchange contracts Trading revenue 274 (747) 310 Equity contracts Trading revenue (2,432) 57 (496) Precious metals contracts Trading revenue 145 594 312 Credit contracts Trading revenue 83 (556) (445) Total $ (1,941) $ (256) $ (408) The following table presents information on gains and losses on derivative instruments held for non-qualifying hedging and other activities and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) Recognized in Income on Derivatives Year Ended December 31, 2021 2020 2019 (in millions) Interest rate contracts Gain (loss) on instruments designated at fair value and related derivatives $ (61) $ 229 $ 364 Interest rate contracts Other income (loss) (2) (6) (1) Foreign exchange contracts Gain (loss) on instruments designated at fair value and related derivatives — (1) (3) Equity contracts Gain (loss) on instruments designated at fair value and related derivatives 1,139 592 1,809 Credit contracts Gain (loss) on instruments designated at fair value and related derivatives — 37 — Credit contracts Other income (loss) (19) (18) (24) Other contracts (1) Other income (loss) (2) (9) (63) Total $ 1,055 $ 824 $ 2,082 (1) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares. Credit-Risk Related Contingent Features The majority of our derivative contracts contain provisions that require us to maintain a specific credit rating from each of the major credit rating agencies. Sometimes the derivative instrument transactions are a part of broader structured product transactions. If our credit ratings were to fall below the current ratings, the counterparties to our derivative instruments could demand us to post additional collateral. The amount of additional collateral required to be posted will depend on whether we are downgraded by one or more notches. The aggregate fair value of all derivative instruments with credit-risk related contingent features that were in a net liability position at December 31, 2021 was $361 million, for which we had posted collateral of $172 million. The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a net liability position at December 31, 2020 was $221 million, for which we had posted collateral of $67 million. Substantially all of the collateral posted is in the form of cash or securities available-for-sale. See Note 28, "Guarantee Arrangements, Pledged Assets and Repurchase Agreements," for further details. The following table presents the amount of additional collateral that we would be required to post (from the current collateral level) related to derivative instruments with credit-risk related contingent features if our long-term ratings were downgraded by one or two notches. A downgrade by a single rating agency that does not result in a rating lower than a preexisting corresponding rating provided by another rating agency will generally not result in additional collateral. One-notch downgrade Two-notch downgrade (in millions) Amount of additional collateral to be posted upon downgrade $ 20 $ 68 Notional Value of Derivative Contracts The following table summarizes the notional values of derivative contracts: At December 31, 2021 2020 (in millions) Interest rate: Futures and forwards $ 44,686 $ 37,098 Swaps 177,876 406,609 Options written 10,842 33,269 Options purchased 12,688 32,427 Total interest rate 246,092 509,403 Foreign exchange: Swaps, futures and forwards 974,725 1,195,449 Options written 28,577 53,200 Options purchased 28,678 53,595 Spot 31,319 57,040 Total foreign exchange 1,063,299 1,359,284 Commodities, equities and precious metals: Swaps, futures and forwards 60,054 54,458 Options written 5,873 17,078 Options purchased 11,800 27,083 Total commodities, equities and precious metals 77,727 98,619 Credit derivatives 7,023 52,611 Other contracts (1) 1,204 1,216 Total $ 1,395,345 $ 2,021,133 (1) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares.

Fair Value Option

Fair Value Option	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Option	Fair Value Option We report our results to HSBC in accordance with HSBC Group accounting and reporting policies ("Group Reporting Basis"), which apply International Financial Reporting Standards ("IFRSs") as issued by the International Accounting Standards Board ("IASB"). We typically have elected to apply fair value option ("FVO") accounting to selected financial instruments to align the measurement attributes of those instruments under U.S. GAAP and the Group Reporting Basis and to simplify the accounting model applied to those financial instruments. We elected to apply FVO accounting to certain commercial loans held for sale, certain student loans, certain fixed-rate long-term debt issuances and all of our hybrid instruments, including structured notes and deposits. Excluding the fair value movement on fair value option liabilities attributable to our own credit spread, which is recorded in other comprehensive income (loss), changes in the fair value of fair value option assets and liabilities as well as the mark-to-market adjustment on the related derivatives and the net realized gains or losses on these derivatives are reported in gain (loss) on instruments designated at fair value and related derivatives in the consolidated statement of income (loss). Loans and Loans Held For Sale We elected to apply FVO accounting to certain commercial syndicated loans which are originated with the intent to sell and certain commercial loans that we purchased from the secondary market and hold as hedges against our exposure to certain total return swaps and include these loans as loans held for sale in the consolidated balance sheet. We also previously elected to apply FVO accounting to certain student loans (which were subsequently transferred from held for investment to held for sale during the fourth quarter of 2021). These elections allow us to account for these loans at fair value which is consistent with the manner in which the instruments are managed. Where available, fair value is based on observable market pricing obtained from independent sources, relevant broker quotes or observed market prices of instruments with similar characteristics. Where observable market parameters are not available, fair value is determined based on contractual cash flows adjusted for estimates of prepayment rates, expected default rates and loss severity discounted at management's estimate of the expected rate of return required by market participants. We also consider loan-specific risk mitigating factors such as collateral arrangements in determining the fair value estimate. Interest from these loans is recorded as interest income in the consolidated statement of income (loss). Because a substantial majority of the loans elected for the fair value option are floating-rate commercial loans, changes in their fair value are primarily attributable to changes in loan-specific credit risk factors. The components of gain (loss) related to loans designated at fair value are summarized in the table below. At December 31, 2021 and 2020, no loans for which the fair value option has been elected were 90 days or more past due or in nonaccrual status. Long-Term Debt (Own Debt Issuances) We elected to apply FVO accounting for certain fixed-rate long-term debt for which we had applied or otherwise would elect to apply fair value hedge accounting. The election allows us to achieve a similar accounting effect without having to meet the hedge accounting requirements. The own debt issuances elected under FVO are traded in secondary markets and, as such, the fair value is determined based on observed prices for the specific instruments. The observed market price of these instruments reflects the effect of changes to our own credit spreads and interest rates. Interest on the fixed-rate debt accounted for under FVO is recorded as interest expense in the consolidated statement of income (loss). Excluding the fair value movement attributable to our own credit spread, the components of gain (loss) in the consolidated statement of income (loss) related to long-term debt designated at fair value are summarized in the table below. Hybrid Instruments We elected to apply FVO accounting to all of our hybrid instruments issued, including structured notes and deposits. The valuation of the hybrid instruments is predominantly driven by the derivative features embedded within the instruments and our own credit risk. Cash flows of the hybrid instruments in their entirety, including the embedded derivatives, are discounted at an appropriate rate for the applicable duration of the instrument adjusted for our own credit spreads. The credit spreads applied to structured notes are determined with reference to our own debt issuance rates observed in the primary and secondary markets, internal funding rates, and structured note rates in recent executions while the credit spreads applied to structured deposits are determined using market rates currently offered on comparable deposits with similar characteristics and maturities. Interest on this debt is recorded as interest expense in the consolidated statement of income (loss). Excluding the fair value movement attributable to our own credit spread, the components of gain (loss) in the consolidated statement of income (loss) related to hybrid instruments designated at fair value are summarized in the table below. The following table summarizes the fair value and unpaid principal balance for items we account for under FVO: Fair Value Unpaid Principal Balance Fair Value Over (Under) Unpaid Principal Balance (in millions) At December 31, 2021 Student loans held for sale $ 25 $ 28 $ (3) Commercial loans held for sale 23 23 — Fixed rate long-term debt 945 741 204 Hybrid instruments: Structured deposits 2,749 2,465 284 Structured notes 7,997 6,834 1,163 At December 31, 2020 Student loans held for investment $ 32 $ 34 $ (2) Commercial loans held for sale 36 36 — Fixed rate long-term debt 1,030 741 289 Hybrid instruments: Structured deposits 4,155 3,844 311 Structured notes 9,695 8,332 1,363 Components of Gain (Loss) on Instruments Designated at Fair Value and Related Derivatives The following table summarizes the components of gain (loss) on instruments designated at fair value and related derivatives reflected in the consolidated statement of income (loss) for the years ended December 31, 2021, 2020 and 2019: Loans and Loans Held for Sale Long-Term Hybrid Total (in millions) Year Ended December 31, 2021 Interest rate and other components (1) $ — $ 74 $ (1,119) $ (1,045) Credit risk component (2) 2 — — 2 Total mark-to-market on financial instruments designated at fair value 2 74 (1,119) (1,043) Mark-to-market on related derivatives — (88) 1,128 1,040 Net realized gain on related long-term debt derivatives — 38 — 38 Gain (loss) on instruments designated at fair value and related derivatives $ 2 $ 24 $ 9 $ 35 Year Ended December 31, 2020 Interest rate and other components (1) $ — $ (79) $ (695) $ (774) Credit risk component (2)(3) (49) — — (49) Total mark-to-market on financial instruments designated at fair value (49) (79) (695) (823) Mark-to-market on related derivatives 37 88 699 824 Net realized gain on related long-term debt derivatives — 33 — 33 Gain (loss) on instruments designated at fair value and related derivatives $ (12) $ 42 $ 4 $ 34 Year Ended December 31, 2019 Interest rate and other components (1) $ — $ (200) $ (1,986) $ (2,186) Credit risk component (2) 3 — — 3 Total mark-to-market on financial instruments designated at fair value 3 (200) (1,986) (2,183) Mark-to-market on related derivatives — 148 1,983 2,131 Net realized gain on related long-term debt derivatives — 39 — 39 Gain (loss) on instruments designated at fair value and related derivatives $ 3 $ (13) $ (3) $ (13) (1) As it relates to hybrid instruments, interest rate and other components primarily includes interest rate, foreign exchange and equity contract risks. (2) The fair value movement on fair value option liabilities attributable to our own credit spread is recorded in other comprehensive income (loss). (3) During 2020, the loss in the credit risk component for loans and loans held for sale was attributable to the widening of credit spreads associated with certain commercial loans held for sale which were impacted by the COVID-19 pandemic.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Total income taxes was as follows: Year Ended December 31, 2021 2020 2019 (in millions) Provision (benefit) for income taxes $ 224 $ (42) $ 157 Income tax expense (benefit) included in common equity related to: Unrealized gains (losses) on investment securities (258) 274 128 Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread 4 8 (98) Unrealized gains (losses) on derivatives designated as cash flow hedges (19) 23 3 Employer accounting for post-retirement plans 1 (1) (5) Total income taxes $ (48) $ 262 $ 185 The components of the provision for income taxes were as follows: Year Ended December 31, 2021 2020 2019 (in millions) Current: Federal $ (111) $ (45) $ (3) State and local (7) (9) 35 Foreign 2 (13) 16 Total current (116) (67) 48 Deferred 340 25 109 Provision (benefit) for income taxes $ 224 $ (42) $ 157 The following table provides an analysis of the difference between effective rates based on the provision (benefit) for income taxes attributable to pretax income (loss) and the statutory U.S. Federal income tax rate: Year Ended December 31, 2021 2020 2019 (dollars are in millions) Tax expense (benefit) at the U.S. Federal statutory income tax rate $ 192 21.0 % $ (206) (21.0) % $ 57 21.0 % Increase (decrease) in rate resulting from: State and local taxes, net of Federal benefit 31 3.4 (2) (.2) 23 8.5 Non-deductible FDIC assessment fees 13 1.4 15 1.5 5 1.9 Non-deductible goodwill impairment (1) — — 165 16.8 77 28.5 Items affecting prior periods (2) — — 3 .3 7 2.6 Uncertain tax positions 6 .7 (8) (.8) 5 1.9 Low income housing and other tax credit investments (15) (1.7) (14) (1.4) (13) (4.8) Other (3) (.2) 5 .5 (4) (1.5) Provision (benefit) for income taxes $ 224 24.6 % $ (42) (4.3) % $ 157 58.1 % (1) For 2020, the amount represents non-deductible goodwill impairment related to our previously separate Retail Banking and Wealth Management and Private Banking businesses. For 2019, the amount represents non-deductible goodwill impairment related to our previously separate Retail Banking and Wealth Management business. (2) For 2020, the amount primarily relates to prior year State audit settlements, partially offset by changes in estimates as a result of filing the 2019 Federal and State income tax returns. For 2019, the amount primarily relates to changes in estimates as a result of filing the 2018 Federal income tax return and a reduction in a State and local capital loss carryback claim, partially offset by prior year State audit adjustments. The components of the net deferred tax asset are presented in the following table: At December 31, 2021 2020 (in millions) Deferred tax assets: Allowance for credit losses $ 150 $ 245 Accrued expenses 64 108 Interests in real estate mortgage investment conduits (1) 127 158 Unrealized losses on investment securities 21 — Capitalized costs (2) 495 501 Lease liabilities 111 152 Other 219 268 Total deferred tax assets 1,187 1,432 Deferred tax liabilities: Lease ROU assets 80 127 Unrealized gains on investment securities — 237 Amortization of intangible assets 21 19 Fair value adjustments 43 1 Other 14 37 Total deferred tax liabilities 158 421 Net deferred tax asset $ 1,029 $ 1,011 (1) Real estate mortgage investment conduits ("REMICs") are investment vehicles that hold commercial and residential mortgages in trust and issue securities representing an undivided interest in these mortgages. HSBC Bank USA holds portfolios of noneconomic residual interests in a number of REMICs. This item represents tax basis in such interests which has accumulated as a result of tax rules requiring the recognition of income related to such noneconomic residuals. (2) Reflects our tax return election to capitalize certain service costs. A reconciliation of the beginning and ending amount of unrecognized tax benefits related to uncertain tax positions is as follows: 2021 2020 2019 (in millions) Balance at January 1, $ 20 $ 30 $ 24 Additions for tax positions of prior years 9 — 7 Reductions for tax positions of prior years (3) (1) (1) Reductions related to settlements with taxing authorities — (9) — Balance at December 31, $ 26 $ 20 $ 30 The total amount of unrecognized tax benefits that, if recognized, would affect the effective income tax rate was $22 million, $16 million and $24 million at December 31, 2021, 2020 and 2019, respectively. Included in the unrecognized tax benefits are certain items the recognition of which would not affect the effective tax rate, such as the tax effect of temporary differences and the amount of State taxes that would be deductible for U.S. Federal tax purposes. It is reasonably possible that there could be a change in the amount of our unrecognized tax benefits within the next 12 months due to settlements or statutory expirations in various State and local tax jurisdictions. It is our policy to recognize accrued interest related to uncertain tax positions in interest expense in the consolidated statement of income (loss) and to recognize penalties, if any, related to uncertain tax positions as a component of other expenses in the consolidated statement of income (loss). Accruals for the payment of interest associated with uncertain tax positions totaled $6 million, $5 million and $10 million at December 31, 2021, 2020 and 2019, respectively. Our accrual for the payment of interest associated with uncertain tax positions increased by $1 million during 2021 and decreased by $5 million during 2020. Deferred tax assets and liabilities are recognized for the future tax consequences related to the differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, for State net operating losses and for State tax credits. Our net deferred tax assets, including deferred tax liabilities, totaled $1,029 million and $1,011 million at December 31, 2021 and 2020, respectively. See Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion regarding our accounting policy relating to the evaluation, recognition and measurement of both the HNAH Group's and HSBC USA's deferred tax assets and liabilities. In evaluating the need for a valuation allowance at December 31, 2021, it has been determined that HNAH Group projections of future taxable income from U.S. operations based on management approved business plans provide sufficient and appropriate support for the recognition of our net deferred tax assets. Federal income tax returns for 2017 and forward remain open to examination by the Internal Revenue Service. We remain subject to State and local income tax examinations for years 2010 and forward. We are currently under audit by various State and local tax jurisdictions. Uncertain tax positions are reviewed on an ongoing basis and are adjusted in light of changing facts and circumstances, including progress of tax audits, developments in case law and the closing of statute of limitations. Such adjustments are reflected in the tax provision. At December 31, 2021, for State tax purposes, we had apportioned and pre-tax effected net operating loss carryforwards of $13 million which expire as follows: $1 million in 2028 and $12 million in 2030 and beyond.

Preferred Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Preferred Stock	Preferred StockHSBC USA preferred stock outstanding was $1,265 million at both December 31, 2021 and 2020 and included 1,265 shares of 6.0 percent Non-Cumulative Series I Preferred Stock issued to HSBC North America. Dividends on the 6.0 percent Non-Cumulative Series I Preferred Stock are non-cumulative and will be payable when and if declared by our Board of Directors semi-annually on the first business day of June and December of each year at the stated rate of 6.0 percent. The Series I Preferred Stock may be redeemed at our option, in whole or in part, at a redemption price equal to $1,000,000 per share, plus an amount equal to any declared and unpaid dividends, but only after receipt of written approval from the FRB.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Accumulated other comprehensive income (loss) includes certain items that are reported directly within a separate component of equity. The following table presents changes in accumulated other comprehensive income (loss) balances: Year Ended December 31, 2021 2020 2019 (in millions) Unrealized gains (losses) on investment securities: Balance at beginning of period $ 750 $ (116) $ (519) Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses on securities available-for-sale, net of tax of $1 million (1) — 2 — Balance at beginning of period, adjusted 750 (114) (519) Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $(244) million, $298 million and $145 million, respectively (774) 944 459 Reclassification adjustment for gains realized in net income (loss), net of tax of $(18) million, $(33) million and $(21) million, respectively (2) (55) (104) (67) Reversal of provision for credit losses realized in net income (loss), net of tax of nil, less than $(1) million and nil, respectively (3) — (2) — Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income (loss), net of tax of $4 million, $8 million and $4 million, respectively (4) 14 26 11 Total other comprehensive income (loss) for period (815) 864 403 Balance at end of period (65) 750 (116) Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread: Balance at beginning of period 15 (9) 301 Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $4 million, $8 million and $(68) million, respectively 12 24 (217) Reclassification adjustment for a gain realized in net income (loss), net of tax of $(30) million (5) — — (93) Total other comprehensive income (loss) for period 12 24 (310) Balance at end of period 27 15 (9) Unrealized gains (losses) on derivatives designated as cash flow hedges: Balance at beginning of period (79) (151) (159) Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $(16) million, $20 million and $(5) million, respectively (49) 64 (19) Reclassification adjustment for (gains) losses realized in net income (loss), net of tax of $(3) million, $3 million and $8 million, respectively (6) (10) 8 27 Total other comprehensive income (loss) for period (59) 72 8 Balance at end of period (138) (79) (151) Pension and postretirement benefit liability: Balance at beginning of period (7) (3) 11 Other comprehensive income (loss) for period: Change in unfunded pension and postretirement liability, net of tax of $1 million, $(1) million and $(5) million, respectively 4 (4) (14) Total other comprehensive income (loss) for period 4 (4) (14) Balance at end of period (3) (7) (3) Total accumulated other comprehensive income (loss) at end of period $ (179) $ 679 $ (279) (1) As a result of adopting new accounting guidance in 2020, beginning January 1, 2020, an allowance for credit losses is recognized for debt securities, with changes in the allowance recorded in earnings. Prior to January 1, 2020, debt securities were assessed for other-than-temporary impairment. (2) Amount reclassified to net income (loss) is included in other securities gains, net in our consolidated statement of income (loss). (3) Changes in the allowance for credit losses on securities available-for-sale are included in the provision for credit losses in our consolidated statement of income (loss). (4) Amount amortized to net income (loss) is included in interest income in our consolidated statement of income (loss). During 2014, we transferred securities from available-for-sale to held-to-maturity. At the date of transfer, AOCI included net pretax unrealized losses related to the transferred securities which are being amortized over the remaining contractual life of each security as an adjustment of yield in a manner consistent with the amortization of any premium or discount. (5) In 2019, HSBC Bank USA repurchased long-term debt that was designated under fair value option. As a result, the cumulative gain attributable to our own credit spread associated with the debt was reclassified to other income (loss) in our consolidated statement of income (loss). (6) Amount reclassified to net income (loss) is included in net interest income in our consolidated statement of income (loss).

Share-Based Plans

Share-Based Plans	12 Months Ended
	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Plans	Share-Based Plans Employee Stock Purchase Plans The HSBC International Employee Share Purchase Plan (the "HSBC ShareMatch Plan") allowed eligible employees to purchase HSBC shares with a maximum monthly contribution of $342 in 2021, $327 in 2020 and $302 in 2019. For every three shares purchased under the HSBC ShareMatch Plan (the "Investment Share") the employee is awarded an additional share at no charge (the "Matching Share"). The Investment Share is fully vested at the time of purchase while the Matching Share vests at the end of three years contingent upon continuing employment with the HSBC Group. Compensation expense related to Employee Stock Purchase Plans was less than $1 million in 2021, 2020 and 2019, respectively. Restricted Share Plans Under the HSBC Group Share Plan, share-based awards have been granted to key employees typically in the form of restricted share units. These shares have been granted subject to either time-based vesting or performance based-vesting, typically over three

Pension and Other Postretiremen

Pension and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Pension and Other Postretirement Benefits	Pension and Other Postretirement Benefits Defined Benefit Pension Plan Certain employees are eligible to participate in the HSBC North America qualified defined benefit pension plan (either the "HSBC North America Pension Plan" or the "Plan") which facilitates a unified employee benefit policy and unified employee benefit plan administration for HSBC companies operating in the United States. Future benefit accruals for legacy participants under the final average pay formula and future contributions under the cash balance formula were previously discontinued and, as a result, the Plan is frozen. The following table reflects the portion of pension expense and its related components of the combined HSBC North America Pension Plan which has been allocated to us and is recorded in our consolidated statement of income (loss). We have not been allocated any portion of the Plan's net pension asset. Year Ended December 31, 2021 2020 2019 (in millions) Interest cost on projected benefit obligation $ 42 $ 45 $ 56 Expected return on plan assets (58) (68) (78) Amortization of net actuarial loss — 4 21 Administrative costs 3 4 4 Pension (income) expense $ (13) $ (15) $ 3 The assumptions used in determining pension expense of the HSBC North America Pension Plan are as follows: 2021 2020 2019 Discount rate (1) 2.45% / 3.10% / 2.70% / 2.80% 3.15% / 3.20% / 2.70% / 2.55% 4.25% / 3.85% / 3.55% / 3.15% Expected long-term rate of return on Plan assets (2) 3.50 3.50 5.00 (1) Since the Plan is measured on a quarterly basis, pension expense for the Plan is calculated each quarter based on the preceding quarter-end rate. Shown are the discount rates used to determine pension expense for each respective quarter (i.e., first quarter / second quarter / third quarter / fourth quarter). Prior period amounts have been revised to conform to the current period presentation. (2) As a result of a significant decrease in yields on fixed income securities driven by the COVID-19 pandemic and subsequent reduction in longer term capital market returns, as well as a shift in investment mix that reduced the Plan's exposure to equity investments, HSBC North America decided to reduce its expected long-term rate of return on Plan assets assumption to 3.50 percent, effective beginning July 1, 2020. The expected long-term rate of return on Plan assets used during the first half of 2020 was 5.00 percent. Defined Contribution and Other Supplemental Retirement Plans We maintain a 401(k) plan covering substantially all employees. Employer contributions to the plan are based on employee contributions. Total expense recognized for this plan was $26 million, $28 million and $31 million in 2021, 2020 and 2019, respectively. Certain employees are participants in various defined contribution and other non-qualified supplemental retirement plans all of which have been frozen. Total expense recognized for these plans was $2 million in 2021, 2020 and 2019, respectively. Postretirement Plans Other Than Pensions Certain employees also participate in plans which provide medical and life insurance benefits to retirees and eligible dependents. These plans cover all eligible employees who meet certain age and vested service requirements. We have instituted dollar limits on payments under the plans to control the cost of future medical benefits. Net periodic postretirement benefit cost was immaterial in 2021, 2020 and 2019, respectively. Our postretirement benefit plans are funded on a pay-as-you-go basis. The funded status of our postretirement benefit plans was a liability of $40 million and $45 million at December 31, 2021 and 2020, respectively. We currently estimate that we will pay benefits of approximately $4 million relating to our postretirement benefit plans in 2022. The assumptions used in determining the benefit obligation of our postretirement benefit plans at December 31 are as follows: 2021 2020 2019 Discount rate 2.70 % 2.25 % 3.00 % Salary increase assumption 3.00 3.00 3.00 For measurement purposes, 6.3 percent (pre-age 65) and, as it relates to the postretirement benefit plans which were not amended to eliminate future health cost increases, 6.5 percent (post-age 65) annual rates of increase in the per capita costs of covered health care benefits were assumed for 2021. These rates are assumed to decrease gradually reaching the ultimate rate of 4.5 percent in 2032, and remain at that level thereafter.

Fee Income from Contracts with

Fee Income from Contracts with Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Fee Income from Contracts with Customers	Fee Income from Contracts with Customers The following table summarizes fee income from contracts with customers disaggregated by type of activity, as well as a reconciliation to total other revenues, during the years ended December 31, 2021, 2020 and 2019. Following the table is a description of the various types of fee-based activities and how revenue associated with these activities is recognized. Year Ended December 31, 2021 2020 2019 (in millions) Credit card fees, net $ 37 $ 38 $ 67 Trust and investment management fees 108 132 132 Other fees and commissions: Account services 290 251 264 Credit facilities 320 268 302 Other fees 42 48 53 Total other fees and commissions 652 567 619 Servicing and other fees from HSBC affiliates 321 347 354 Insurance (1) 6 7 12 Total fee income from contracts with customers 1,124 1,091 1,184 Other non-fee revenues 113 444 670 Total other revenues (2) $ 1,237 $ 1,535 $ 1,854 (1) Included within other income (loss) in the consolidated statement of income (loss). (2) See Note 25, "Business Segments," for a reconciliation of total other revenues on a U.S. GAAP basis to other operating income for each business segment under the Group Reporting Basis. Credit card fees, net Credit card fees, net includes interchange fees earned from merchants who accept our cards in connection with the purchase of their goods and/or services. These fees are recognized when we satisfy the performance obligation by simultaneously approving a card holder's purchase at the point of sale and remitting payment to the merchant. We recognized interchange fees of $93 million, $71 million and $101 million during the years ended December 31, 2021, 2020 and 2019, respectively. Annual fees on credit cards, net of direct lending costs, are billed upfront and recognized on a straight-line basis over one year. Other credit card fees such as cash advance and over-limit fees are transaction based and are recognized and billed at the point in time the transaction occurs which is when the performance obligation is met. Costs related to our credit card rewards program vary based on multiple factors including card holder activity, card holder reward redemption rates and card holder reward selections. These costs are recorded when the rewards are earned by the customer and are presented as a reduction to credit card fees. Credit card rewards program costs totaled $67 million, $41 million and $44 million during the years ended December 31, 2021, 2020 and 2019, respectively. Trust and investment management fees Trust and investment management fees include investment management and administration fees which are typically billed as a percentage of the average value of a customer's assets during an agreed payment period or for some contracts, the value of a customer's assets at the end of an agreed payment period and therefore represent variable consideration. The fee percentage and payment period are agreed with the customer upfront. Generally, payment periods are monthly or quarterly and coincide with our reporting periods, thereby resolving the uncertainty of the variable consideration by the reporting date. For payment periods that do not coincide with our reporting periods, judgment is required to estimate the fee and determine the amount to include in an accrual. An accrual is only recorded to the extent it is highly probable that a significant reversal of revenue will not occur. In most cases, a significant reversal of revenue is not highly probable. Other trust and investment management fees are transaction based and are recognized and billed at the point in time the transaction occurs which is when the performance obligation is met. From time to time, we may also receive performance fees from some funds, though these fees are typically only recognized when the performance fee is determinable and the uncertainty of the variable consideration is resolved. Account services We provide services for commercial and consumer customer accounts that generate fees from various activities including: account statements, ATM transactions, cash withdrawals, wire transfers, remittances, check cashing, debit cards and internet and phone banking. The fees for these services are established in the customer account agreement and are either billed individually at the time the service is performed or on a monthly basis for a package or bundle of services as the services are performed. The performance obligation for these services is met when the services are performed. Customer account agreements typically include a package of services with multiple performance obligations or a bundle of services making up a single performance obligation. In the case of a package of services, the pattern of transfer to the customer is usually the same for all services, and therefore the package of services is treated as a single performance obligation. In some cases, a package or bundle of services is billed upfront as an annual fee and recognized on a straight-line basis over one year as the services are performed and the performance obligation is met. Credit facilities Credit facilities fees include fees generated from lending activities that are not included in the direct loan origination fees which are recognized in interest income as an adjustment to yield. This includes fees associated with loan commitments, revolving credit facilities, standby letters of credit, loan syndication and other transaction based fees. These fees are either billed as a fixed price or as a percentage of the approved lending limit or transaction value. The fee percentage is agreed with the customer upfront. Although the percentage-based fees represent variable consideration, the uncertainty of the variable consideration is resolved by the time the revenue is recognized as the lending limit or transaction value is known on the contract or transaction date. Loan syndication fees received for managing a syndication and other transaction based fees are recognized and billed at the point in time the transaction occurs, which is when the performance obligation is met. Fees associated with loan commitments, revolving credit facilities and standby letters of credit are billed upfront and recognized on a straight-line basis over the period the service is performed which is when the performance obligation is met (e.g., the commitment period). In the event a loan commitment or standby letter of credit is exercised, the remaining unamortized fee is recognized as an adjustment to yield over the loan term. Other fees and commissions Other fees and commissions include fees received associated with various other activities such as custody services, imports/exports, clearing and other miscellaneous services. These fees are typically transaction based and are recognized and billed at the point in time the transaction occurs which is when the performance obligation is met. Fees earned from providing customers with custody services are typically recognized and billed on a monthly basis, which is the period over which the service is performed and the performance obligation is met, as a percentage of the value of the customer's assets held in custody (calculated daily or monthly). Servicing and other fees from HSBC affiliates We receive fees from other HSBC affiliates for providing them with various banking, wealth management and other miscellaneous services as well as support for certain administrative and global business activities. These fees are reported in servicing and other fees from HSBC affiliates and are typically recognized and billed on a monthly basis over the period the service is performed or for some fees that are transaction based, at the point in time the transaction occurs, which is when the performance obligation is met. See Note 24, "Related Party Transactions," for additional information regarding the various services provided and other transactions with HSBC affiliates. Insurance We earn commissions from the sale of third-party insurance policies which are typically recognized on a weekly or monthly basis, when the policy goes into effect which is when the performance obligation is met. Deferred Fee Income Information related to deferred fee income on loan commitments, revolving credit facilities and standby letters of credit is included in Note 28, "Guarantee Arrangements, Pledged Assets and Repurchase Agreements," and Note 29, "Fair Value Measurements." Excluding these items, we had deferred fee income related to certain account service fees that are paid upfront and recognized over the service period and annual fees on credit cards which collectively was $4 million and $3 million at December 31, 2021 and 2020, respectively. We expect to recognize this revenue over a remaining period of one year or less.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In the normal course of business, we conduct transactions with HSBC and its subsidiaries. HSBC 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) HSBC Bank USA to other HSBC affiliates (other than FDIC insured banks) are legally required to be secured by eligible collateral. The following tables and discussions below present the more significant related party balances and the income (expense) generated by related party transactions: At December 31, 2021 2020 (in millions) Assets: Cash and due from banks $ 300 $ 516 Interest bearing deposits with banks 59 187 Securities purchased under agreements to resell (1) 594 3,941 Trading assets 119 314 Loans 2,793 1,100 Other (2) 401 319 Total assets $ 4,266 $ 6,377 Liabilities: Deposits $ 9,137 $ 15,163 Trading liabilities (3) 130 2,375 Short-term borrowings 309 270 Long-term debt 5,511 2,878 Other (2) 277 268 Total liabilities $ 15,364 $ 20,954 (1) Reflects purchases of securities under which other HSBC affiliates have agreed to repurchase. (2) Other assets and other liabilities primarily consist of derivative balances associated with hedging activities and other miscellaneous account receivables and payables. (3) The decrease in trading liabilities at December 31, 2021 primarily reflects a decrease in borrowing of gold inventory from HSBC Bank plc to support client activity levels. Year Ended December 31, 2021 2020 2019 (in millions) Income (Expense): Interest income $ 26 $ 55 $ 168 Interest expense (237) (354) (538) Net interest expense (211) (299) (370) Trading revenue (expense) (3,182) (93) (2,669) Servicing and other fees from HSBC affiliates: HSBC Bank plc 176 186 171 HSBC Markets (USA) Inc. ("HMUS") 91 107 111 Other HSBC affiliates 54 54 72 Total servicing and other fees from HSBC affiliates 321 347 354 Gain on instruments designated at fair value and related derivatives 1,128 699 1,986 Support services from HSBC affiliates: HTSU (1,061) (1,066) (1,153) HMUS (118) (89) (100) Other HSBC affiliates (441) (396) (385) Total support services from HSBC affiliates (1,620) (1,551) (1,638) Rental income from HSBC affiliates, net (1) 42 44 55 Stock based compensation expense (2) (15) (22) (25) (1) We receive rental income from our affiliates, and in some cases pay rental expense to our affiliates, for certain office space. Net rental income from our affiliates is recorded as a component of occupancy expense, net in our consolidated statement of income (loss). (2) Employees may participate in one or more stock compensation plans sponsored by HSBC. These expenses are included in salaries and employee benefits in our consolidated statement of income (loss). Certain employees are also eligible to participate in a defined benefit pension plan and other postretirement plans sponsored by HSBC North America which are discussed in Note 22, "Pension and Other Postretirement Benefits." Funding Arrangements with HSBC Affiliates: We use HSBC affiliates to fund a portion of our borrowing and liquidity needs. At December 31, 2021 and 2020, long-term debt with affiliates reflected $5.5 billion and $2.9 billion, respectively, of borrowings from HSBC North America. The remaining outstanding balances include: • $2.0 billion of fixed-rate senior debt which matures in September 2025; • $1.5 billion of fixed-rate senior debt which was issued during the first quarter of 2021 and matures in June 2030; and • $2.0 billion of fixed-rate senior debt which was issued during the second quarter of 2021 and matures in June 2025. We have a $4.0 billion uncommitted line of credit with HSBC North America. The available borrowing capacity under this facility is fungible between HSBC USA, HSBC Securities (USA) Inc. ("HSI") and HSBC North America, but total borrowings cannot collectively exceed $4.0 billion at any time. We had no outstanding borrowing under this credit facility at either December 31, 2021 or 2020. We have also incurred short-term borrowings with certain affiliates. In addition, certain affiliates have placed deposits with us. Lending and Derivative Related Arrangements Extended to HSBC Affiliates: At December 31, 2021 and 2020, we had the following loan balances outstanding with HSBC affiliates: At December 31, 2021 2020 (in millions) HMUS and subsidiaries $ 1,576 $ 1,088 HSBC North America 1,000 — Other short-term affiliate lending 217 12 Total loans $ 2,793 $ 1,100 HMUS and subsidiaries We have extended loans and lines of credit, some of them uncommitted, to HMUS and its subsidiaries in the amount of $11.9 billion and $12.0 billion at December 31, 2021 and 2020, respectively, of which $1.6 billion and $1.1 billion, respectively, was outstanding. The maturities of the outstanding balances range from overnight to three months. Each borrowing is re-evaluated prior to its maturity date and either extended or allowed to mature. HSBC North America Under the $4.0 billion uncommitted fungible line of credit with HSBC North America as discussed above, there was $1.0 billion and nil outstanding at December 31, 2021 and 2020, respectively. The outstanding balance matures in April 2022. We have extended lines of credit to various other HSBC affiliates totaling $4.0 billion and $4.7 billion which did not have any outstanding balances at either December 31, 2021 or 2020. Other short-term affiliate lending In addition to loans and lines extended to affiliates discussed above, from time to time we may extend loans to affiliates which are generally short term in nature. At December 31, 2021 and 2020, there were $217 million and $12 million, respectively, of these loans outstanding. Derivative contracts As part of a global HSBC strategy to offset interest rate or other market risks associated with certain securities, debt issues and derivative contracts with unaffiliated third parties, we routinely enter into derivative transactions with HSBC Bank plc and other HSBC affiliates. The notional value of derivative contracts related to these transactions was approximately $753.2 billion and $923.6 billion at December 31, 2021 and 2020, respectively. The net credit exposure (defined as the net fair value of derivative assets and liabilities, including any collateral received) related to the contracts was approximately $127 million and $66 million at December 31, 2021 and 2020, respectively. We account for these transactions on a mark to market basis, with the change in value of contracts with HSBC affiliates substantially offset by the change in value of related contracts entered into with unaffiliated third parties. As discussed further in Note 3, "Strategic Initiatives," during 2021, we continued to transfer certain interest rate derivative contracts to HSBC Bank plc as part of our Restructuring Plan. In addition, during the third quarter of 2021, we unwound our remaining legacy structured credit products which resulted in the sale of our remaining non-government asset-backed securities held for trading and the termination of the related derivatives. A majority of the securities were sold to HSBC Bank plc and a portion of the related terminated derivatives were total return swaps with HSBC Bank plc. The loss resulting from these unwind related transactions with HSBC Bank plc was not material. Services Provided Between HSBC Affiliates: Under multiple service level agreements, we provide services to and receive services from various HSBC affiliates. The following summarizes these activities: • HSBC North America's technology and support services, including risk management, compliance, operations, finance, tax, legal, human resources, corporate affairs and other shared services, are centralized within HTSU. HTSU also provides certain item processing and statement processing activities to us. The fees we pay HTSU for the centralized support services and processing activities are included in support services from HSBC affiliates. We also receive fees from HTSU for providing certain administrative services to them. The fees we receive from HTSU are included in servicing and other fees from HSBC affiliates. In certain cases, for facilities used by HTSU, we may guarantee their performance under the lease agreements. • We use other subsidiaries of HSBC, including HSBC Global Services Limited an HSBC subsidiary located outside of the United States, to provide various support services to our operations, including among other areas, information technology, software development, customer service, collection, risk management and accounting. The expenses related to these services are included in support services from HSBC affiliates. • We utilize HSI, a subsidiary of HMUS, for broker dealer, debt underwriting, customer referrals, loan syndication and other treasury and traded markets related services, pursuant to service level agreements. Debt underwriting fees charged by HSI are deferred as a reduction of long-term debt and amortized to interest expense over the life of the related debt. Fees charged by HSI for the other services are included in support services from HSBC affiliates. We also receive fees from HSI for providing certain wealth management services to them. The fees we receive from HSI are included in servicing and other fees from HSBC affiliates. • We receive fees from other subsidiaries of HSBC, including HSBC Bank plc, for providing them with banking and other miscellaneous services as well as support for certain administrative and global business activities. These fees are reported in servicing and other fees from HSBC affiliates. Other Transactions with HSBC Affiliates: At both December 31, 2021 and 2020, we had $1,265 million of non-cumulative preferred stock issued and outstanding to HSBC North America. See Note 19, "Preferred Stock," for additional details. During the fourth quarter of 2021, we paid a distribution on our common stock of $1.0 billion from surplus capital to HSBC North America. See Note 26, "Retained Earnings and Regulatory Capital Requirements," for additional details.

Business Segments

Business Segments	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Business Segments	Business Segments We have distinct businesses, which are aligned with HSBC's global business strategy: Wealth and Personal Banking ("WPB"), Commercial Banking ("CMB"), and Global Banking and Markets ("GBM"). These businesses and a Corporate Center ("CC") serve as our reportable segments with the exception of GBM. Our GBM business is comprised of three distinct operating segments: Global Banking ("GB"), Markets and Securities Services ("MSS"), and Global Banking and Markets Other ("GBM Other"), which are separately reported as discussed further below. During the fourth quarter of 2021, we implemented a change to our internal management reporting to align with changes to the governance structure and how we assess business performance of our GBM business, which is now being reported and managed as three separate operating segments: GB, MSS and GBM Other. As a result, we have aligned our segment reporting to reflect this change for all periods presented. The following tables summarize the impact of this change on reported segment profit (loss) before tax, total assets and total deposits for the periods below: Year Ended Year Ended As Previously Reported After Reporting Changes As Previously Reported After Reporting Changes (in millions) Segment profit (loss) before tax: GBM $ 387 NSR $ 571 NSR GB NSR $ 209 NSR $ 544 MSS NSR 194 NSR 132 GBM Other NSR (16) NSR (105) NSR Not Separately Reported At December 31, 2020 At December 31, 2019 As Previously Reported After Reporting Changes As Previously Reported After Reporting Changes (in millions) Segment total assets: GBM $ 132,363 NSR $ 126,710 NSR GB NSR $ 11,473 NSR $ 16,002 MSS NSR 67,293 NSR 71,742 GBM Other (1) NSR 53,597 NSR 38,966 Segment total deposits: GBM $ 44,668 NSR $ 29,050 NSR GB NSR $ 37,320 NSR $ 24,596 MSS NSR 3,417 NSR 2,956 GBM Other NSR 3,931 NSR 1,498 NSR Not Separately Reported (1) Includes assets allocated from Markets Treasury. As of January 1, 2021, we also implemented a change to our internal management reporting to prospectively report assets related to our active branches within our WPB segment, which were historically reported within our CC segment. As a result, lease impairment and other related costs associated with these branches is recorded within our WPB segment beginning in 2021. Prior periods were not impacted by this change. There have been no additional changes in the basis of our segmentation as compared with the presentation in our Annual Report on Form 10-K for the year ended December 31, 2020 ("2020 Form 10-K"). Net interest income of each segment represents the difference between actual interest earned on assets and interest incurred on liabilities of the segment, adjusted for a funding charge or credit that includes both interest rate and liquidity components. Segments are charged a cost to fund assets (e.g. customer loans) and receive a funding credit for funds provided (e.g. customer deposits) based on equivalent market rates that incorporate both repricing (interest rate risk) and tenor (liquidity) characteristics. The objective of these charges/credits is to transfer interest rate risk to one centralized unit in Markets Treasury. Markets Treasury income statement and balance sheet results are allocated to each of the global businesses based upon tangible equity levels and levels of any surplus liabilities. Certain other revenue and operating expense amounts are also apportioned among the business segments based upon the benefits derived from this activity or the relationship of this activity to other segment activity. These inter-segment transactions have not been eliminated, and we generally account for them as if they were with third parties. Our segment results are presented in accordance with HSBC Group accounting and reporting policies, which apply IFRSs as issued by the IASB. As a result, our segment results are prepared and presented using financial information prepared on the Group Reporting Basis as operating results are monitored and reviewed, trends are evaluated and decisions about allocating resources, such as employees, are primarily made on this basis. We continue, however, to monitor capital adequacy and report to regulatory agencies on a U.S. GAAP basis. There have been no changes in the measurement of segment profit as compared with the presentation in our 2020 Form 10-K. A summary of significant differences between U.S. GAAP and the Group Reporting Basis as they impact our results is presented below: Net Interest Income Loan origination - The scope of loan origination costs deferred is more stringent under the Group Reporting Basis and generally results in lower costs being deferred than permitted under U.S. GAAP. In addition, deferred loan origination fees, costs and loan premiums are generally amortized to earnings based on the expected life of the loan under the Group Reporting Basis as part of the effective interest calculation, while under U.S. GAAP, they are generally amortized to earnings based on either a contractual or expected life basis. In the case of credit cards, while under the Group Reporting Basis deferred costs are amortized over the expected life of the credit card relationship, they are amortized over a shorter period of one year under U.S. GAAP. Leases - Under the Group Reporting Basis, all leases are recognized as financing arrangements with interest expense on the lease liability recognized separately from depreciation of the ROU asset, which generally results in a front-loaded pattern of total lease expense. Under U.S. GAAP, expense on operating leases is generally recognized on a straight-line basis in operating expenses. Deposit incentives - Under the Group Reporting Basis, costs associated with cash back incentives offered on customer deposits are deferred and amortized to interest expense over the incentive period, while under U.S. GAAP, such costs are recognized immediately in operating expenses. Other Operating Income (Total Other Revenues) Loans held for sale - For loans transferred to held for sale subsequent to origination, the Group Reporting Basis requires these loans to be reported separately on the balance sheet when certain criteria are met which are generally more stringent than those under U.S. GAAP, but does not change the recognition and measurement criteria. Accordingly, for the Group Reporting Basis, such loans continue to be accounted for and credit losses continue to be measured in accordance with IFRS 9, "Financial Instruments," with any gain or loss recorded at the time of sale. U.S. GAAP requires loans that meet the held for sale classification requirements be transferred to a held for sale category and subsequently measured at the lower of amortized cost or fair value. The existing allowance for credit losses at the time of transfer is recognized as a charge-off to the extent fair value is less than amortized cost and attributable to credit, with any remaining allowance for credit losses released to the provision for credit losses. Under U.S. GAAP, the component of the lower of amortized cost or fair value adjustment upon transfer to held for sale related to credit risk is recorded in provision for credit losses while the component related to interest rates and liquidity factors is recorded in other revenues. Changes in the lower of amortized cost or fair value after the initial transfer to held for sale are recorded in other revenues to the extent permissible. For loans originated with the intent to sell, the Group Reporting Basis requires these loans to be classified as trading assets and recorded at their fair value, with gains and losses recorded in trading revenue. Under U.S. GAAP, such loans are classified as loans held for sale and, with the exception of certain loans accounted for under FVO accounting, are recorded at the lower of amortized cost or fair value, with changes in the lower of amortized cost or fair value adjustment recorded in other revenues to the extent permissible. Renewable energy tax credit investments - Under the Group Reporting Basis, renewable energy tax credit investments are measured at fair value, with changes in fair value recognized in earnings. Under U.S. GAAP, certain of these investments are accounted for under the equity method, with the amortization of our investment balance presented in other revenues and the tax benefits obtained presented in income tax expense (benefit). Low income housing tax credit investments - Under the Group Reporting Basis, the amortization of our investment balance and associated tax benefits are presented net in other operating income. Under U.S. GAAP, amortization of our investment balance and associated tax benefits are presented net in income tax expense (benefit). Debt extinguishment - During 2019, extinguishment of long-term debt resulted in a gain under U.S. GAAP compared with a loss under the Group Reporting Basis. As we previously elected to apply fair value option accounting to this debt, under U.S. GAAP, the extinguishment resulted in the realization of a gain associated with our own credit spread that was previously recorded in AOCI which more than offset the premium paid to extinguish the debt. Under the Group Reporting Basis, the gain associated with our own credit spread remains in equity and does not get recognized in earnings. Expected Credit Losses (Provision for Credit Losses) Expected credit losses - In 2020, we adopted new accounting guidance under U.S. GAAP which requires entities to recognize an allowance for credit losses based on lifetime ECL. However, under the Group Reporting Basis only financial assets which are considered to have experienced a significant increase in credit risk ("stage 2") or for which there is objective evidence of impairment ("stage 3") require an allowance based on lifetime ECL. Under the Group Reporting Basis, financial assets at initial recognition and which have not experienced a significant increase in credit risk since initial recognition are considered to be in "stage 1" and only require an allowance based on expected credit losses resulting from default events that are possible within the next 12 months ("12-month ECL"). Under the Group Reporting Basis, a majority of our loans are considered to be in stage 1 and only a 12-month ECL is recorded. Primarily as a result of this difference, the allowance for credit losses is higher under U.S. GAAP than under the Group Reporting Basis in 2021 and 2020. Prior to 2020, we maintained an allowance for credit losses under U.S. GAAP that reflected our estimate of probable incurred losses in the existing loan portfolio, while under the Group Reporting Basis, we used the ECL approach as discussed above. For commercial loans collectively evaluated for impairment, we utilized a loss emergence period greater than 12 months for calculating the allowance for credit losses under U.S. GAAP, while under the Group Reporting Basis, a loss emergence period is not applicable. Under the Group Reporting Basis, a majority of our commercial loans were considered to be in stage 1 and only a 12-month ECL was recorded. Primarily as a result of the different approaches, the allowance for credit losses for commercial loans was higher under U.S. GAAP than under the Group Reporting Basis in 2019. In addition to the differences discussed above, under the Group Reporting Basis, the allowance for credit losses includes estimated ECL arising from expected future draws on unused credit card lines, while under U.S. GAAP, unused credit card lines are considered unconditionally cancellable and expected future draws are not reserved for. Also, the new accounting guidance adopted under U.S. GAAP in 2020 requires inclusion of expected recoveries, limited to the cumulative amount of prior write-offs, when estimating the allowance for credit losses for in scope financial assets (including collateral-dependent assets), which results in an impact to earnings substantially consistent with the Group Reporting Basis. Prior to 2020, these expected recoveries were not recognized under U.S. GAAP. Loans held for sale - As discussed more fully above under "Other Operating Income (Total Other Revenues)," under U.S. GAAP for loans that are transferred to held for sale, the existing allowance for credit losses at the time of transfer is recognized as a charge-off or released to the provision for credit losses. There is no similar requirement under the Group Reporting Basis. Operating Expenses Other long-lived assets impairment - A long-lived asset group is tested for impairment when events or changes in circumstances indicate that the carrying amount of a long-lived asset group might not be recoverable. Under U.S. GAAP, if the estimated undiscounted cash flows of the long-lived asset group exceed its carrying amount, an impairment is not recognized. However, if the estimated undiscounted cash flows are less than the carrying amount of the long-lived asset group, a second step is performed to determine fair value and an impairment loss is required if the carrying amount of the long-lived asset group exceeds fair value. Under the Group Reporting Basis, there is no separate undiscounted cash flow test and an impairment loss is recognized if the carrying amount of the cash generating unit exceeds the higher of its value in use or fair value less costs to sell. In 2020, we recorded an impairment charge under the Group Reporting Basis related to the write-off of all the capitalized software and a portion of the leasehold improvements associated with our WPB business segment. Under U.S. GAAP, the estimated undiscounted cash flows of the long-lived asset group exceeded its carrying amount and no impairment charge was required. Consequently, the carrying amounts of capitalized software and leasehold improvements are higher under U.S. GAAP than under the Group Reporting Basis and, as a result, corresponding amortization expense is higher under U.S. GAAP. In addition, during 2021, we determined we would exit certain branches as part of our Restructuring Plan and, as a result, we recorded an impairment charge of $18 million under U.S. GAAP to write-off the leasehold improvements associated with these branches. These leasehold improvements were previously written-off under the Group Reporting Basis. Deposit incentives - As discussed more fully above under "Net Interest Income," incentive costs on customer deposits are deferred and amortized to interest expense under the Group Reporting Basis, while under U.S. GAAP, such costs are recognized immediately in operating expenses. Loan origination - As discussed more fully above under "Net Interest Income," loan origination cost deferrals are more stringent under the Group Reporting Basis and generally result in lower costs being deferred than permitted under U.S. GAAP. Pension and other postretirement benefit costs - Under U.S. GAAP, pension expense reflects the expected return on plan assets based on the fair value of plan assets. Additionally, under U.S. GAAP, pension expense includes the amortization of the amount by which actuarial losses exceeds the higher of 10 percent of the projected benefit obligation or fair value of plan assets (the corridor). Under the Group Reporting Basis, pension expense is determined using a finance cost component comprising the net interest on the net defined benefit liability, which does not reflect the benefit from the expectation of higher returns on plan assets. In 2021, 2020 and 2019, pension expense was lower under U.S. GAAP due primarily to the benefit of higher expected returns on plan assets. Leases - As discussed more fully above under "Net Interest Income," all leases are recognized as financing arrangements under the Group Reporting Basis with interest expense on the lease liability recognized separately from depreciation of the ROU asset. Under U.S. GAAP, expense on operating leases is generally recognized on a straight-line basis in operating expenses. Goodwill impairment - Under the Group Reporting Basis, goodwill was amortized until 2005, however goodwill was amortized under U.S. GAAP until 2002, which resulted in a lower carrying amount of goodwill and, therefore, lower impairment charges under the Group Reporting Basis in 2020 and 2019. Litigation expense - Under U.S. GAAP, litigation accruals are recorded when it is probable a liability has been incurred and the amount is reasonably estimable. Under the Group Reporting Basis, a present obligation and a probable outflow of economic benefits must exist for an accrual to be recorded. This may create differences in the timing of accrual recognition between the Group Reporting Basis and U.S. GAAP. Additionally, under the Group Reporting Basis, legal costs to defend litigation are accrued at the time that a liability is recorded for the related litigation, while under U.S. GAAP, these costs are recognized as services are performed. Assets Derivatives - Under U.S. GAAP, derivative receivables and payables with the same counterparty may be reported on a net basis in the balance sheet when there is a legally enforceable netting agreement in place. In addition, under U.S. GAAP, fair value amounts recognized for the obligation to return cash collateral received or the right to reclaim cash collateral paid are offset against the fair value of derivative instruments. Under the Group Reporting Basis, these agreements do not necessarily meet the requirements for offset, and therefore such derivative receivables and payables are presented gross on the balance sheet. Loans - As discussed more fully above under "Other Operating Income (Total Other Revenues)," on a Group Reporting Basis, loans designated as held for sale at the time of origination and accrued interest are classified as trading assets. In addition, the accounting requirements governing when loans previously held for investment are transferred to a held for sale category are more stringent under the Group Reporting Basis than under U.S. GAAP which results in loans generally being reported as held for sale later than under U.S. GAAP. Precious metal loans - Under U.S. GAAP, precious metals leased or loaned to customers are reclassified from trading precious metals into loans and interest is accrued, while under the Group Reporting Basis, precious metals leased or loaned to customers continue to be part of the precious metal inventory recorded in other assets and are carried at fair value. Loan allowance - As discussed more fully above under "Expected Credit Losses (Provision for Credit Losses)," beginning in 2020, under U.S. GAAP, the allowance for credit losses is recognized based on lifetime ECL. Prior to 2020, we used an incurred loss approach for estimating credit losses under U.S. GAAP which, for commercial loans collectively evaluated for impairment, included the utilization of a loss emergence period greater than 12 months. Under the Group Reporting Basis, the allowance for credit losses in all periods is recognized based on expected credit losses, however, financial assets which have not experienced a significant increase in credit risk since initial recognition only require an allowance based on a 12-month ECL. Other long-lived assets - As discussed more fully above under "Operating Expenses," in 2020, we recorded an impairment charge under the Group Reporting Basis related to the write-off of all the capitalized software and a portion of the leasehold improvements associated with our WPB business segment. Consequently, the carrying amounts of capitalized software and leasehold improvements are higher under U.S. GAAP than under the Group Reporting Basis. Goodwill - The Group Reporting Basis and U.S. GAAP require goodwill to be tested for impairment at least annually, or more frequently if circumstances indicate that goodwill may be impaired. Under the Group Reporting Basis, goodwill was amortized until 2005, however goodwill was amortized under U.S. GAAP until 2002, which resulted in a lower carrying amount of goodwill under the Group Reporting Basis. Methods, assumptions and reporting groups used to calculate impairment under the Group Reporting Basis may differ locally from that utilized by HSBC. Securities transferred to held-to-maturity - During 2014, we transferred securities from available-for-sale to held-to-maturity. Under the Group Reporting Basis, the remaining unamortized net pretax unrealized losses related to the transferred securities were adjusted against the carrying value of the securities held-to-maturity, while under U.S. GAAP, such unrealized losses are included in AOCI and are being amortized over the remaining contractual life of each security as an adjustment to yield. The following table summarizes the results for each segment on a Group Reporting Basis, as well as provides a reconciliation of total results under the Group Reporting Basis to U.S. GAAP consolidated totals: Group Reporting Basis Consolidated Amounts GBM WPB CMB GB MSS GBM Other CC Total Group Reporting Basis Adjust- ments (1) Group Reporting Basis Reclassi- fications (2) U.S. GAAP (in millions) Year Ended December 31, 2021 Net interest income (expense) $ 801 $ 771 $ 315 $ 47 $ (24) $ (6) $ 1,904 $ 19 $ 160 $ 2,083 Other operating income 303 297 409 318 100 3 1,430 (51) (142) 1,237 Total operating income (expense) 1,104 1,068 724 365 76 (3) 3,334 (32) 18 3,320 Expected credit losses / provision for credit losses (21) (26) (157) — (1) — (205) (365) — (570) 1,125 1,094 881 365 77 (3) 3,539 333 18 3,890 Operating expenses 1,221 581 407 275 98 316 2,898 62 18 2,978 Profit (loss) before income tax $ (96) $ 513 $ 474 $ 90 $ (21) $ (319) $ 641 $ 271 $ — $ 912 Balances at end of period: Total assets $ 62,904 $ 43,052 $ 10,486 $ 43,007 $ 44,151 $ 1,746 $ 205,346 $ (16,114) $ — $ 189,232 Total loans, net 22,285 21,971 9,930 178 881 — 55,245 (1,991) 2,163 55,417 Goodwill — 358 — — — — 358 100 — 458 Total deposits 40,232 45,082 41,343 1,298 981 — 128,936 (2,889) 16,985 143,032 Year Ended December 31, 2020 Net interest income (expense) $ 837 $ 821 $ 369 $ 91 $ (62) $ (30) $ 2,026 $ 9 $ 139 $ 2,174 Other operating income 368 234 351 454 165 129 1,701 (46) (120) 1,535 Total operating income 1,205 1,055 720 545 103 99 3,727 (37) 19 3,709 Expected credit losses / provision for credit losses 189 293 139 — 1 — 622 188 — 810 1,016 762 581 545 102 99 3,105 (225) 19 2,899 Operating expenses 2,203 587 372 351 118 403 4,034 (172) 19 3,881 Profit (loss) before income tax $ (1,187) $ 175 $ 209 $ 194 $ (16) $ (304) $ (929) $ (53) $ — $ (982) Balances at end of period: Total assets $ 59,200 $ 36,354 $ 11,473 $ 67,293 $ 53,597 $ 1,760 $ 229,677 $ (33,243) $ — $ 196,434 Total loans, net 24,048 23,377 11,260 329 475 — 59,489 (2,307) 3,891 61,073 Goodwill — 358 — — — — 358 100 — 458 Total deposits 50,000 42,369 37,320 3,417 3,931 — 137,037 (4,253) 12,366 145,150 Year Ended December 31, 2019 Net interest income (expense) $ 1,018 $ 829 $ 513 $ 91 $ (83) $ (65) $ 2,303 $ 13 $ (204) $ 2,112 Other operating income 330 239 415 358 127 68 1,537 102 215 1,854 Total operating income 1,348 1,068 928 449 44 3 3,840 115 11 3,966 Expected credit losses / provision for credit losses 115 55 1 — — — 171 32 (8) 195 1,233 1,013 927 449 44 3 3,669 83 19 3,771 Operating expenses 1,645 581 383 317 149 238 3,313 169 19 3,501 Profit (loss) before income tax $ (412) $ 432 $ 544 $ 132 $ (105) $ (235) $ 356 $ (86) $ — $ 270 Balances at end of period: Total assets $ 50,851 $ 34,241 $ 16,002 $ 71,742 $ 38,966 $ 2,421 $ 214,223 $ (38,848) $ — $ 175,375 Total loans, net 24,243 24,647 15,875 777 907 — 66,449 (2,965) 4,432 67,916 Goodwill 693 358 — — — — 1,051 191 — 1,242 Total deposits 44,553 29,986 24,596 2,956 1,498 — 103,589 (4,747) 20,851 119,693 (1) Represents adjustments associated with differences between U.S. GAAP and the Group Reporting Basis. These adjustments, which are more fully described above, consist of the following: Net Other Provision Operating Profit (Loss) Total (in millions) December 31, 2021 Deposit incentives $ 13 $ — $ — $ 9 $ 4 $ (25) Derivatives — — — — — (16,172) Expected credit losses — — (272) — 272 (148) Goodwill — — — — — 100 Leases 16 — — 22 (6) 13 Loan origination (11) — — (20) 9 23 Loans held for sale — (31) (93) — 62 (31) Other long-lived assets impairment — — — 61 (61) 152 Pension and other postretirement benefit costs — — — (10) 10 — Renewable energy tax credit investments — (21) — — (21) 3 Securities transferred to held-to-maturity — — — — — (24) Other 1 1 — — 2 (5) Total adjustments $ 19 $ (51) $ (365) $ 62 $ 271 $ (16,114) December 31, 2020 Deposit incentives $ 14 $ — $ — $ 21 $ (7) $ (28) Derivatives — — — — — (33,163) Expected credit losses (4) — 200 — (204) (357) Goodwill impairment — — — 91 (91) 100 Leases 23 — — 14 9 33 Loan origination (24) (2) — (20) (6) 18 Loans held for sale — (25) (12) — (13) — Other long-lived assets impairment — — — (264) 264 201 Pension and other postretirement benefit costs — — — (15) 15 — Renewable energy tax credit investments — (11) — — (11) 2 Securities transferred to held-to-maturity — — — — — (38) Other — (8) — 1 (9) (11) Total adjustments $ 9 $ (46) $ 188 $ (172) $ (53) $ (33,243) December 31, 2019 Debt extinguishment $ — $ 123 $ — $ — $ 123 $ — Deposit incentives 15 — — 32 (17) (23) Derivatives — — — — — (38,651) Expected credit losses (3) (1) 32 — (36) (357) Goodwill impairment — — — 156 (156) 191 Leases 25 — — 8 17 15 Loan origination (27) — — (19) (8) 38 Loans held for sale 2 (1) — — 1 (5) Pension and other postretirement benefit costs — — — (12) 12 — Renewable energy tax credit investments — (7) — — (7) 3 Securities transferred to held-to-maturity — — — — — (65) Other 1 (12) — 4 (15) 6 Total adjustments $ 13 $ 102 $ 32 $ 169 $ (86) $ (38,848) (2) Represents differences in financial statement presentation between U.S. GAAP and the Group Reporting Basis.

Retained Earnings and Regulator

Retained Earnings and Regulatory Capital Requirements	12 Months Ended
	Dec. 31, 2021
Retained Earnings Note Disclosure [Abstract]
Retained Earnings and Regulatory Capital Requirements	Retained Earnings and Regulatory Capital Requirements Bank dividends are one of the sources of funds used for payment of shareholder dividends and other HSBC USA cash needs. Approval from the Office of the Comptroller of the Currency ("OCC") is required if the total of all dividends HSBC Bank USA declares in any year exceeds the cumulative net income for that year, combined with the net income for the two preceding years reduced by dividends attributable to those years. OCC approval also is required for a reduction of permanent capital of HSBC Bank USA. Under a separate restriction, payment of dividends is prohibited in amounts greater than undivided profits then on hand, after deducting actual losses and bad debts. Bad debts are debts due and unpaid for a period of six months unless well secured, as defined, and in the process of collection. We are subject to regulatory capital rules issued by U.S. banking regulators including Basel III (the "Basel III rule"). A bank or bank holding company's failure to meet minimum capital requirements can result in certain mandatory actions and possibly additional discretionary actions by its regulators. The following table summarizes the capital amounts and ratios of HSBC USA and HSBC Bank USA, calculated in accordance with the Basel III rule at December 31, 2021 and 2020: December 31, 2021 December 31, 2020 Capital Well-Capitalized Ratio (1) Actual Capital Well-Capitalized Ratio (1) Actual (dollars are in millions) Common equity Tier 1 ratio: (4) HSBC USA $ 15,341 4.5 % (2) 15.1 % $ 15,891 4.5 % (2) 14.5 % HSBC Bank USA 17,665 6.5 17.6 18,180 6.5 16.4 Tier 1 capital ratio: (4) HSBC USA 16,606 6.0 16.3 17,156 6.0 15.6 HSBC Bank USA 20,165 8.0 20.1 20,680 8.0 18.7 Total capital ratio: (4) HSBC USA 18,821 10.0 18.5 20,680 10.0 18.8 HSBC Bank USA 22,157 10.0 22.1 23,303 10.0 21.1 Tier 1 leverage ratio: HSBC USA 16,606 4.0 (2) 8.5 17,156 4.0 (2) 8.6 HSBC Bank USA 20,165 5.0 10.5 20,680 5.0 10.3 Supplementary leverage ratio ("SLR"): HSBC USA 16,606 3.0 (3) 6.6 17,156 3.0 (3) 7.8 HSBC Bank USA 20,165 3.0 (3) 8.1 20,680 3.0 (3) 9.3 Risk-weighted assets: (4)(5) HSBC USA 101,827 109,809 HSBC Bank USA 100,363 110,682 Adjusted quarterly average assets: (6) HSBC USA 194,469 198,698 HSBC Bank USA 192,521 200,026 Total leverage exposure: (7) HSBC USA 251,531 221,216 HSBC Bank USA 248,584 221,334 (1) HSBC USA and HSBC Bank USA are categorized as "well-capitalized," as defined by their principal regulators. To be categorized as well-capitalized under regulatory guidelines, a banking institution must maintain capital equal to or in excess of the ratios reflected in the above table, and must not be subject to a directive, order, or written agreement to meet and maintain specific capital levels. (2) There are no common equity Tier 1 or Tier 1 leverage ratio components in the definition of a well-capitalized bank holding company. The ratios shown are the regulatory minimums. (3) There is no SLR component in the definition of a well-capitalized banking institution. The ratios shown are the regulatory minimums. (4) During the first quarter of 2021, it was determined that certain collateral did not qualify for risk-weighted asset reduction purposes under U.S. capital rules. As a result, reported risk-weighted assets were understated and reported Common equity Tier 1 capital, Tier 1 capital and Total capital ratios were overstated at HSBC USA and HSBC Bank USA at December 31, 2020. We have revised December 31, 2020 amounts to conform to the current period presentation. The following table summarizes the impact of this change on reported risk-weighted assets and capital ratios as of December 31, 2020: December 31, 2020 As Previously Reported As Revised HSBC USA HSBC Bank USA HSBC USA HSBC Bank USA (in millions) Common equity Tier 1 ratio 14.7 % 17.2 % 14.5 % 16.4 % Tier 1 capital ratio 15.9 % 19.6 % 15.6 % 18.7 % Total capital ratio 19.2 % 22.0 % 18.8 % 21.1 % Risk-weighted assets $ 107,808 $ 105,681 $ 109,809 $ 110,682 (5) Calculated using the generally-applicable Standardized Approach. (6) Represents the Tier 1 leverage ratio denominator which reflects quarterly average assets adjusted for amounts permitted to be deducted from Tier 1 capital. (7) Represents the SLR denominator which includes adjusted quarterly average assets plus certain off-balance sheet exposures. In response to the COVID-19 pandemic, the federal banking agencies issued a final rule that provides the option to transition in the regulatory capital impacts of the new current expected credit loss accounting standard over a five-year period. In 2020, HSBC North America and HSBC Bank USA elected the five-year transition option and, as a result, our capital ratios are being reported in accordance with the transition rules in the final rule. Accordingly, during 2020 and 2021, we excluded from regulatory capital the change in retained earnings resulting from adoption of the new accounting standard on January 1, 2020 as well as 25 percent of the change in the allowance for credit losses recognized between January 1, 2020 and December 31, 2021. Beginning January 1, 2022, the excluded impacts will be phased into regulatory capital over a three-year transition period and will be fully reflected at January 1, 2025. Also in response to the COVID-19 pandemic, the FRB issued final rules that permitted intermediate holding companies, such as HSBC North America, and depository institutions, such as HSBC Bank USA, to temporarily exclude U.S. Treasury securities and deposits at Federal Reserve Banks from the denominator of their SLR. The rules were designed to allow banking institutions to expand their balance sheets to accommodate increased customer deposits while continuing to provide credit to companies and households. These changes took effect in 2020 and expired on April 1, 2021. During 2021 and 2020, HSBC USA did not receive any cash capital contributions from its parent, HSBC North America, and did not make any capital contributions to its subsidiary, HSBC Bank USA. During the fourth quarter of 2021, HSBC USA received a common stock return of capital of $1.0 billion from its subsidiary, HSBC Bank USA, and paid a distribution on its common stock of $1.0 billion from surplus capital to its parent, HSBC North America.

Variable Interest Entities

Variable Interest Entities	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	Variable Interest Entities In the ordinary course of business, we have organized special purpose entities ("SPEs") primarily to structure financial products to meet our clients' investment needs, to facilitate clients to access and raise financing from capital markets and to securitize financial assets held to meet our own funding needs. For disclosure purposes, we aggregate SPEs based on the purpose, risk characteristics and business activities of the SPEs. An SPE is a VIE if it lacks sufficient equity investment at risk to finance its activities without additional subordinated financial support or, as a group, the holders of the equity investment at risk lack either a) the power through voting or similar rights to direct the activities of the entity that most significantly impacts the entity's economic performance; or b) the obligation to absorb the entity's expected losses, the right to receive the expected residual returns, or both. Variable Interest Entities We consolidate VIEs in which we hold a controlling financial interest as evidenced by the power to direct the activities of a VIE that most significantly impact its economic performance and the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE and therefore are deemed to be the primary beneficiary. We take into account our entire involvement in a VIE (explicit or implicit) in identifying variable interests that individually or in the aggregate could be significant enough to warrant our designation as the primary beneficiary and hence require us to consolidate the VIE or otherwise require us to make appropriate disclosures. We consider our involvement to be potentially significant where we, among other things, (i) enter into derivative contracts to absorb the risks and benefits from the VIE or from the assets held by the VIE; (ii) provide a financial guarantee that covers assets held or liabilities issued by a VIE; (iii) sponsor the VIE in that we design, organize and structure the transaction; and (iv) retain a financial or servicing interest in the VIE. We are required to evaluate whether to consolidate a VIE when we first become involved and on an ongoing basis. In almost all cases, a qualitative analysis of our involvement in the entity provides sufficient evidence to determine whether we are the primary beneficiary. In rare cases, a more detailed analysis to quantify the extent of variability to be absorbed by each variable interest holder is required to determine the primary beneficiary. Consolidated VIEs The following table summarizes assets and liabilities related to our consolidated VIEs at December 31, 2021 and 2020 which are consolidated on our balance sheet. Assets and liabilities exclude intercompany balances that eliminate in consolidation. December 31, 2021 December 31, 2020 Consolidated Consolidated Consolidated Consolidated (in millions) Low income housing limited liability partnership: Other assets $ 54 $ — $ 79 $ — Interest, taxes and other liabilities — 7 — 9 Subtotal 54 7 79 9 Venture debt financing entity: Loans 46 — 10 — Other assets 1 — — — Interest, taxes and other liabilities — 2 — 1 Subtotal 47 2 10 1 Total $ 101 $ 9 $ 89 $ 10 Low income housing limited liability partnership In 2009, all low income housing investments held by us at the time were transferred to a Limited Liability Partnership ("LLP") in exchange for debt and equity while a third party invested cash for an equity interest that was mandatorily redeemable. The LLP was created in order to ensure the utilization of future tax benefits from these low income housing tax projects. The LLP was deemed to be a VIE as it does not have sufficient equity investment at risk to finance its activities. Upon entering into this transaction, we concluded that we were the primary beneficiary of the LLP due to the nature of our continuing involvement and, as a result, we consolidated the LLP and reported the equity interest issued to the third party investor in long-term debt and the assets of the LLP in other assets on our consolidated balance sheet. The investments held by the LLP represent equity investments in the underlying low income housing partnerships. The LLP does not consolidate the underlying partnerships because it does not have the power to direct the activities of the partnerships that most significantly impact the economic performance of the partnerships. In 2019, the equity interest issued to the third party investor was redeemed. We amortize our low income housing investments in proportion to the allocated tax benefits under the proportional amortization method and present the associated tax benefits net of investment amortization in income tax expense (benefit). Venture debt financing entity HSBC USA has organized and provided equity financing to HSBC Ventures USA Inc. ("HSBC Ventures"), an entity designed to provide debt financing to venture capital-backed companies generally in the form of term or revolving loans, or loan commitments. Given the generally early stage and development of the companies, the loans are typically collateralized by all of the company's assets and intellectual property, or by specific items such as receivables or equipment. The loan terms may, at times, also include warrants for company stock granting HSBC Ventures a share of the financial returns in case of a positive realization event. HSBC USA also provides debt financing to HSBC Ventures in the form of loans on an as-needed basis. HSBC Ventures is a VIE because it does not have sufficient equity investment at risk to finance its activities. As the sole investor, HSBC USA is considered to be the primary beneficiary because it has the obligation to absorb losses and the right to receive benefits that could be potentially significant to HSBC Ventures. As a result, we consolidate HSBC Ventures and report the third party loans and warrants, if any, on our consolidated balance sheet. Unconsolidated VIEs We also have variable interests in other VIEs that are not consolidated because we are not the primary beneficiary. The following table provides additional information on these unconsolidated VIEs, including the variable interests held by us and our maximum exposure to loss arising from our involvement in these VIEs, at December 31, 2021 and 2020: Total Assets Held by Unconsolidated VIEs Carrying Value of Variable Interests Held Reported as Maximum Assets Liabilities (in millions) At December 31, 2021 Limited partnership investments $ 6,700 $ 825 $ 407 $ 825 Asset-backed financing SPE 1,033 873 — 873 Total $ 7,733 $ 1,698 $ 407 $ 1,698 At December 31, 2020 Limited partnership investments $ 4,266 $ 629 $ 285 $ 629 Information on the types of VIEs with which we are involved, the nature of our involvement and the variable interests held in those entities is presented below. Limited partnership investments We invest as a limited partner in partnerships that operate qualified affordable housing, renewable energy and community development projects. The returns of these investments are generated primarily from the tax benefits, including Federal tax credits and tax deductions from operating losses in the project companies. In addition, some of the investments also help us comply with the Community Reinvestment Act. Certain limited partnership structures are considered to be VIEs because either (a) they do not have sufficient equity investment at risk or (b) the limited partners with equity at risk do not have substantive kick-out rights through voting rights or substantive participating rights over the general partner. As a limited partner, we are not the primary beneficiary of the VIEs and do not consolidate them. Our investments in these partnerships are recorded in other assets on the consolidated balance sheet. The maximum exposure to loss shown in the table above represents our recorded investments as well as any outstanding funding commitments extended to the partnerships. Asset-backed financing SPE During the fourth quarter of 2021, we sold a portfolio of commercial real estate loans and provided a loan to the third-party buyer sponsored SPE for a portion of the purchase price. The SPE is an asset-backed financing entity that issued residual beneficial interests to third-party investors. The loan we provided to the SPE is senior to the residual beneficial interests and is secured by the commercial real estate loans held by the SPE. Cash flows from the commercial real estate loans will be used first to settle the interest and principal payments of the loan, with any excess cash flows attributable to the residual interest holders. The SPE is a VIE in which we have a variable interest through our ownership of the loan, which is an arm’s-length transaction. We do not have the power to direct the activities that most significantly impact the VIE’s economic performance. In addition, the VIE is designed such that the residual interest holders absorb any expected loss and/or benefit that could be potentially significant to the VIE and, therefore, we are not the primary beneficiary. The maximum exposure to loss shown in the table above represents our recorded investment in the loan without consideration of any recovery benefits from the value of the commercial real estate loans. Third-party sponsored securitization entities We invest in asset-backed securities issued by third-party sponsored securitization entities which may be considered VIEs. The investments are transacted at arm's-length and decisions to invest are based on a credit analysis of the underlying collateral assets or the issuer. We are a passive investor in these issuers and do not have the power to direct the activities of these issuers. As such, we do not consolidate these securitization entities. Additionally, we do not have other involvements in servicing or managing the collateral assets or provide financial or liquidity support to these issuers which potentially give rise to risk of loss exposure. These investments are an integral part of the disclosure in Note 5, "Trading Assets and Liabilities," Note 6, "Securities," and Note 29, "Fair Value Measurements," and, therefore, are not disclosed in this note to avoid redundancy. In addition to the above, we have established and manage money market funds and non-money market mutual funds to provide customers with investment opportunities. As fund manager, we may be entitled to receive management fees based on the assets under management. We do not consolidate the funds because we do not absorb the majority of the expected future risk associated with the fund's assets, including interest rate, liquidity, credit and other relevant risks that are expected to affect the value of the assets.

Guarantee Arrangements, Pledged

Guarantee Arrangements, Pledged Assets and Repurchase Agreements	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Guarantee Arrangements, Pledged Assets and Repurchase Agreements	Guarantee Arrangements, Pledged Assets and Repurchase Agreements Guarantee Arrangements As part of our normal operations, we enter into credit derivatives and various off-balance sheet guarantee arrangements with affiliates and third parties. These arrangements arise principally in connection with our lending and client intermediation activities and include standby letters of credit and certain credit derivative transactions. The contractual amounts of these arrangements represent our maximum possible credit exposure in the event that we are required to fulfill the maximum obligation under the contractual terms of the guarantee. The following table presents total carrying value and contractual amounts of our sell protection credit derivatives and major off-balance sheet guarantee arrangements at December 31, 2021 and 2020. Following the table is a description of the various arrangements. December 31, 2021 December 31, 2020 Carrying Notional / Maximum Carrying Notional / Maximum (in millions) Credit derivatives (1)(2) $ 7 $ 2,174 $ 144 $ 19,500 Financial standby letters of credit, net of participations (3)(4) — 5,339 — 5,703 Performance standby letters of credit, net of participations (3)(4) — 2,961 — 2,842 Total $ 7 $ 10,474 $ 144 $ 28,045 (1) Includes $1,591 million and $13,550 million of notional issued for the benefit of HSBC affiliates at December 31, 2021 and 2020, respectively. (2) For credit derivatives, the maximum loss is represented by the notional amounts without consideration of mitigating effects from collateral or recourse arrangements. (3) Includes $1,969 million and $1,836 million of both financial and performance standby letters of credit issued for the benefit of HSBC affiliates at December 31, 2021 and 2020, respectively. (4) For standby letters of credit, maximum loss represents losses to be recognized assuming the letters of credit have been fully drawn and the obligors have defaulted with zero recovery. Credit-Risk Related Guarantees Credit derivatives Credit derivatives are financial instruments that transfer the credit risk of a reference obligation from the credit protection buyer to the credit protection seller who is exposed to the credit risk without buying the reference obligation. We sell credit protection on underlying reference obligations (such as loans or securities) by entering into credit derivatives, primarily in the form of credit default swaps, with various institutions. We account for all credit derivatives at fair value. Where we sell credit protection to a counterparty that holds the reference obligation, the arrangement is effectively a financial guarantee on the reference obligation. Under a credit derivative contract, the credit protection seller will reimburse the credit protection buyer upon occurrence of a credit event (such as bankruptcy, insolvency, restructuring or failure to meet payment obligations when due) as defined in the derivative contract, in return for a periodic premium. Upon occurrence of a credit event, we will pay the counterparty the stated notional amount of the derivative contract and receive the underlying reference obligation. The recovery value of the reference obligation received could be significantly lower than its notional principal amount when a credit event occurs. Certain derivative contracts are subject to master netting arrangements and related collateral agreements. A party to a derivative contract may demand that the counterparty post additional collateral in the event its net exposure exceeds certain predetermined limits and when the credit rating falls below a certain grade. We set the collateral requirements by counterparty such that the collateral covers various transactions and products, and is not allocated to specific individual contracts. We manage our exposure to credit derivatives using a variety of risk mitigation strategies where we enter into offsetting hedge positions or transfer the economic risks, in part or in entirety, to investors through the issuance of structured credit products. We actively manage the credit and market risk exposure in the credit derivative portfolios on a net basis and, as such, retain no or a limited net position at any time. The following table summarizes our net credit derivative positions at December 31, 2021 and 2020: December 31, 2021 December 31, 2020 Carrying / Fair Notional Carrying / Fair Notional (in millions) Sell-protection credit derivative positions $ 7 $ 2,174 $ 144 $ 19,500 Buy-protection credit derivative positions (62) 4,849 (74) 33,111 Net position (1) $ (55) $ 2,675 $ 70 $ 13,611 (1) Positions are presented net in the table above to provide a complete analysis of our risk exposure and depict the way we manage our credit derivative portfolio. The offset of the sell-protection credit derivatives against the buy-protection credit derivatives may not be legally binding in the absence of master netting agreements with the same counterparty. Furthermore, the credit loss triggering events for individual sell protection credit derivatives may not be the same or occur in the same period as those of the buy protection credit derivatives thereby not providing an exact offset. Standby letters of credit A standby letter of credit is issued to a third party for the benefit of a client and is a guarantee that the client will perform or satisfy certain obligations under a contract. It irrevocably obligates us to pay a specified amount to the third party beneficiary if the client fails to perform the contractual obligation. We issue two types of standby letters of credit: performance and financial. A performance standby letter of credit is issued where the client is required to perform some non-financial contractual obligation, such as the performance of a specific act, whereas a financial standby letter of credit is issued where the client's contractual obligation is of a financial nature, such as the repayment of a loan or debt instrument. The issuance of a standby letter of credit is subject to our credit approval process and collateral requirements. We charge fees for issuing letters of credit commensurate with the client's credit evaluation and the nature of any collateral. Included in other liabilities are deferred fees on standby letters of credit amounting to $51 million and $44 million at December 31, 2021 and 2020, respectively. Also included in other liabilities is an allowance for credit losses on unfunded standby letters of credit of $14 million and $32 million at December 31, 2021 and 2020, respectively. The following table summarizes the credit ratings related to guarantees including the ratings of counterparties against which we sold credit protection and financial standby letters of credit at December 31, 2021 as an indicative proxy of payment risk: Average Credit Ratings of the Obligors Notional/Contractual Amounts Investment Non-Investment Total (dollars are in millions) Sell-protection Credit Derivatives (1) Single name credit default swaps ("CDS") 2.2 $ 1,125 $ 594 $ 1,719 Index credit derivatives 13.5 400 55 455 Subtotal 1,525 649 2,174 Standby Letters of Credit (2) 1.3 6,478 1,822 8,300 Total $ 8,003 $ 2,471 $ 10,474 (1) The credit ratings in the table represent external credit ratings for classification as investment grade and non-investment grade. (2) External ratings for most of the obligors are not available. Presented above are the internal credit ratings which are developed using similar methodologies and rating scale equivalent to external credit ratings for purposes of classification as investment grade and non-investment grade. Our internal credit ratings are determined based on HSBC's risk rating systems and processes which assign a credit grade based on a scale which ranks the risk of default of a client. The credit grades are assigned and used for managing risk and determining level of credit exposure appetite based on the client's operating performance, liquidity, capital structure and debt service ability. In addition, we also incorporate subjective judgments into the risk rating process concerning such things as industry trends, comparison of performance to industry peers and perceived quality of management. We compare our internal risk ratings to outside external rating agency benchmarks, where possible, at the time of formal review and regularly monitor whether our risk ratings are comparable to the external ratings benchmark data. A non-investment grade rating of a referenced obligor has a negative impact to the fair value of the credit derivative and increases the likelihood that we will be required to perform under the credit derivative contract. We employ market-based parameters and, where possible, use the observable credit spreads of the referenced obligors as measurement inputs in determining the fair value of the credit derivatives. We believe that such market parameters are more indicative of the current status of payment/performance risk than external ratings by the rating agencies which may not be forward-looking in nature and, as a result, lag behind those market-based indicators. Non Credit-Risk Related Guarantees and Other Arrangements Visa covered litigation In 2008, we received Class B Shares as part of Visa's initial public offering ("IPO"). Pursuant to the IPO, we, along with all the other Class B shareholders, agreed to indemnify Visa for the claims and obligations arising from certain specific covered litigation. The Class B Shares are not eligible to be converted into publicly traded Class A Shares until settlement of the covered litigation described in Note 30, "Litigation and Regulatory Matters". Accordingly, the Class B Shares are considered restricted and are only transferable under limited circumstances, which include transfers to other Class B shareholders. In 2017, we sold substantially all of our remaining Visa Class B Shares to a third party. Under the terms of the sale agreements, we entered into swap agreements with the purchaser to retain the litigation risk associated with the Class B Shares sold until the related litigation is settled and the Class B Shares can be converted into Class A Shares. These swaps had a carrying value of $38 million and $67 million at December 31, 2021 and 2020, respectively. The swap agreements we entered into with the purchaser requires us to (a) make periodic payments, calculated by reference to the market price of Class A Shares and (b) make or receive payments based on subsequent changes in the conversion rate of Class B Shares into Class A Shares. We have entered into a total return swap position to economically hedge the periodic payments made under these swap agreements. The payments under the derivative will continue until the Class B Shares are able to be converted into Class A Shares. The fair value of the swap agreements is estimated using a discounted cash flow methodology and is dependent upon the final resolution of the related litigation. Changes in fair value between periods are recognized in other income (loss). In 2021, we recorded a loss of $3 million related to a change in the Visa Class B Share conversion rate. In 2020, we recorded a loss of $9 million primarily related to extending the maturity of the total return swap position used to economically hedge the periodic payments made under the swap agreements. In 2019, we recorded a loss of $52 million related to an increase in the expected timing of the final resolution of the related litigation and, to a lesser extent, changes in the Visa Class B Share conversion rate. See Note 16, "Derivative Financial Instruments," for further information. Clearing houses and exchanges We are a member of various exchanges and clearing houses that trade and clear securities and/or derivatives contracts. Under the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, members of a clearing house may be required to contribute to a guaranty fund to backstop members' obligations to the clearing house. As a member, we may be required to pay a proportionate share of the financial obligations of another member who defaults on its obligations to the exchange or the clearing house. Our guarantee obligations would arise only if the exchange or clearing house had exhausted its resources. Any potential contingent liability under these membership agreements cannot be estimated. Lease Obligations We are obligated under a number of noncancellable operating leases for premises and equipment. See Note 12, "Leases," for information regarding our leases, including a maturity analysis of our operating lease liabilities. Mortgage Loan Repurchase Obligations We originate and sell mortgage loans to third parties and provide various representations and warranties related to, among other things, the ownership of the loans, the validity of the liens, the loan selection and origination process, and the compliance to the origination criteria established by the government agencies. In the event of a breach of our representations and warranties, we may be obligated to repurchase the loans with identified defects or to indemnify the buyers. Our contractual obligation arises only when the breach of representations and warranties are discovered and repurchase is demanded. In estimating our repurchase liability arising from breaches of representations and warranties, we consider historical losses on residual risks not covered by settlement agreements adjusted for any risk factors not captured in the historical losses as well as the level of outstanding repurchase demands received. Outstanding repurchase demands received were immaterial at December 31, 2021 and 2020. Our estimated repurchase liability for obligations arising from the breach of representations and warranties associated with mortgage loans sold was $3 million at both December 31, 2021 and 2020. Our repurchase liability represents our best estimate of the loss that has been incurred, including interest, arising from breaches of representations and warranties associated with mortgage loans sold. Because the level of mortgage loan repurchase losses is dependent upon economic factors, investor demand strategies and other external risk factors such as housing market trends that may change, the level of the liability for mortgage loan repurchase losses requires significant judgment. We continue to evaluate our methods of determining the best estimate of loss based on recent trends. As these estimates are influenced by factors outside our control, there is uncertainty inherent in these estimates making it reasonably possible that they could change. The range of reasonably possible losses in excess of our recorded repurchase liability is between zero and $25 million at December 31, 2021. This estimated range of reasonably possible losses was determined based upon modifying the assumptions utilized in our best estimate of probable losses to reflect what we believe to be reasonably possible adverse assumptions. Securitization Activity In addition to the repurchase risk described above, we have also been involved as a sponsor/seller of loans used to facilitate whole loan securitizations underwritten by our affiliate, HSI. In this regard, we began acquiring residential mortgage loans in 2005 which were warehoused on our balance sheet with the intent of selling them to HSI to facilitate HSI's whole loan securitization program which was discontinued in 2007. During 2005-2007, we purchased and sold $24 billion of such loans to HSI which were subsequently securitized and sold by HSI to third parties. See "Mortgage Securitization Matters" in Note 30, "Litigation and Regulatory Matters," for additional discussion of related exposure. Pledged Assets Pledged assets included in the consolidated balance sheet consisted of the following: At December 31, 2021 2020 (in millions) Interest bearing deposits with banks (1) $ 563 $ 2,158 Trading assets (2) 1,773 1,265 Securities available-for-sale (3) 7,618 8,652 Securities held-to-maturity (3) 599 1,076 Loans (4) 17,777 18,146 Other assets (5) 1,211 2,352 Total $ 29,541 $ 33,649 (1) Represents gross amount of cash on deposit with banks related to derivative collateral-support agreements, of which a majority has been netted against derivative liabilities on the consolidated balance sheet. (2) Trading assets are primarily pledged against liabilities associated with repurchase agreements. (3) Securities are primarily pledged against derivatives, public fund deposits, trust deposits and various short-term and long term borrowings, as well as providing capacity for potential secured borrowings from the FHLB and the Federal Reserve Bank of New York. (4) Loans are primarily residential mortgage loans pledged against current and potential borrowings from the FHLB and the Federal Reserve Bank of New York. (5) Represents gross amount of cash on deposit with non-banks related to derivative collateral support agreements, of which a majority has been netted against derivative liabilities on the consolidated balance sheet. Debt securities pledged as collateral under repurchase agreements that can be sold or repledged by the secured party continue to be reported on the consolidated balance sheet. The fair value of securities available-for-sale that could be sold or repledged was $2,410 million and $2,077 million at December 31, 2021 and 2020, respectively. The fair value of trading assets that could be sold or repledged was $1,749 million and $1,265 million at December 31, 2021 and 2020, respectively. The fair value of collateral we accepted under security resale agreements but was not reported on the consolidated balance sheet was $12,848 million and $41,447 million at December 31, 2021 and 2020, respectively. Of this collateral, $12,848 million and $41,047 million could be sold or repledged at December 31, 2021 and 2020, respectively, of which $538 million and $4,063 million, respectively, had been sold or repledged as collateral under repurchase agreements or to cover short sales. Repurchase Agreements We enter into purchases of securities under agreements to resell (resale agreements) and sales of securities under agreements to repurchase (repurchase agreements) identical or substantially the same securities. Resale and repurchase agreements are accounted for as secured lending and secured borrowing transactions, respectively. Repurchase agreements may require us to deposit cash or other collateral with the lender. In connection with resale agreements, it is our policy to obtain possession of collateral, which may include the securities purchased, with market value in excess of the principal amount loaned. The market value of the collateral subject to the resale and repurchase agreements is regularly monitored, and additional collateral is obtained or provided when appropriate, to ensure appropriate collateral coverage of these secured financing transactions. The following table provides information about resale and repurchase agreements that are subject to offset at December 31, 2021 and 2020: Gross Amounts Not Offset in the Balance Sheet Gross Amounts Recognized Gross Amounts Offset in the Balance Sheet (1) Net Amounts Presented in the Balance Sheet Financial Instruments (2) Cash Collateral Received / Pledged Net Amount (3) (in millions) At December 31, 2021 Assets: Securities purchased under resale agreements $ 12,871 $ 2,357 $ 10,514 $ 10,464 $ 50 $ — Liabilities: Securities sold under repurchase agreements $ 4,672 $ 2,357 $ 2,315 $ 2,315 $ — $ — At December 31, 2020 Assets: Securities purchased under resale agreements $ 41,382 $ 5,636 $ 35,746 $ 35,746 $ — $ — Liabilities: Securities sold under repurchase agreements $ 7,401 $ 5,636 $ 1,765 $ 1,762 $ — $ 3 (1) Represents recognized amount of resale and repurchase agreements with counterparties subject to legally enforceable netting agreements that meet the applicable netting criteria as permitted by generally accepted accounting principles. (2) Represents securities received or pledged to cover financing transaction exposures. (3) Represents the amount of our exposure that is not collateralized / covered by pledged collateral. The following table provides the class of collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings at December 31, 2021 and 2020: Overnight and Continuous Up to 30 Days 31 to 90 Days 91 Days to One Year Greater Than One Year Total (in millions) At December 31, 2021 U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities $ — $ 3,442 $ 1,151 $ 79 $ — $ 4,672 At December 31, 2020 U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities $ 4,091 $ 2,810 $ 500 $ — $ — $ 7,401

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Accounting principles related to fair value measurements provide a framework for measuring fair value that focuses on the exit price that would be received to sell an asset or paid to transfer a liability in the principal market (or in the absence of the principal market, the most advantageous market) accessible in an orderly transaction between willing market participants (the "Fair Value Framework"). Where required by the applicable accounting standards, assets and liabilities are measured at fair value using the "highest and best use" valuation premise. Fair value measurement guidance clarifies that financial instruments do not have alternative use and, as such, the fair value of financial instruments should be determined using an "in-exchange" valuation premise. However, the fair value measurement guidance provides a valuation exception and permits an entity to measure the fair value of a group of financial assets and financial liabilities with offsetting credit risks and/or market risks based on the exit price it would receive or pay to transfer the net risk exposure of a group of assets or liabilities if certain conditions are met. We elected to apply the measurement exception to a group of derivative instruments with offsetting credit risks and market risks, which primarily relate to interest rate, foreign currency, debt and equity price risk, and commodity price risk as of the reporting date. Fair Value Adjustments The best evidence of fair value is quoted market price in an actively traded market, where available. In the event listed price or market quotes are not available, valuation techniques that incorporate relevant transaction data and market parameters reflecting the attributes of the asset or liability under consideration are applied. Where applicable, fair value adjustments are made to ensure the financial instruments are appropriately recorded at fair value. The fair value adjustments reflect the risks associated with the products, contractual terms of the transactions, and the liquidity of the markets in which the transactions occur. The fair value adjustments are broadly categorized by the following major types: Credit valuation adjustment - The credit valuation adjustment is an adjustment to a group of financial assets and financial liabilities, predominantly derivative assets and derivative liabilities, to reflect the credit quality of the parties to the transaction in arriving at fair value. A credit valuation adjustment to a financial asset is required to reflect the default risk of the counterparty. A debit valuation adjustment to a financial liability is recorded to reflect the default risk of HUSI. See "Valuation Techniques - Derivatives" below for additional details. Liquidity risk adjustment - The liquidity risk adjustment (primarily in the form of bid-offer adjustment) reflects the cost that would be incurred to close out the market risks by hedging, disposing or unwinding the position. Valuation models generally produce mid-market values. The bid-offer adjustment is made in such a way that results in a measure that reflects the exit price that most represents the fair value of the financial asset or financial liability under consideration or, where applicable, the fair value of the net market risk exposure of a group of financial assets or financial liabilities. These adjustments relate primarily to Level 2 assets. Model valuation adjustment - Where fair value measurements are determined using an internal valuation model based on observable and unobservable inputs, certain valuation inputs may be less readily determinable. There may be a range of possible valuation inputs that market participants may assume in determining the fair value measurement. The resultant fair value measurement has inherent measurement risk if one or more parameters are unobservable and must be estimated. An input valuation adjustment is necessary to reflect the likelihood that market participants may use different input parameters, and to mitigate the possibility of measurement error. In addition, the values derived from valuation techniques are affected by the choice of valuation model and model limitation. When different valuation techniques are available, the choice of valuation model can be subjective. Furthermore, the valuation model applied may have measurement limitations. In those cases, an additional valuation adjustment is also applied to mitigate the measurement risk. Model valuation adjustments are not material and relate primarily to Level 2 instruments. We apply stress scenarios in determining appropriate liquidity risk and model risk adjustments for Level 3 fair values by reviewing the historical data for unobservable inputs (e.g., correlation, volatility). Some stress scenarios involve at least a 95 percent confidence interval (i.e., two standard deviations). We also utilize unobservable parameter adjustments when instruments are valued using internally developed models which reflects the uncertainty in the value estimates provided by the model. Funding Fair Value Adjustment ("FFVA") - The FFVA reflects the estimated present value of the future market funding cost or benefit associated with funding uncollateralized derivative exposure at unsecured funding spreads. See "Valuation Techniques - Derivatives" below for additional details. Fair Value Hierarchy The Fair Value Framework establishes a three-tiered fair value hierarchy as follows: Level 1 quoted market price - Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 valuation technique using observable inputs - Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are inactive, and measurements determined using valuation models where all significant inputs are observable, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 valuation technique with significant unobservable inputs - Level 3 inputs are unobservable inputs for the asset or liability and include situations where fair values are measured using valuation techniques based on one or more significant unobservable inputs. Classification within the fair value hierarchy is based on whether the lowest hierarchical level input that is significant to the fair value measurement is observable. As such, the classification within the fair value hierarchy is dynamic and can be transferred to other hierarchy levels in each reporting period. Where fair value measurements are determined based on information obtained from independent pricing services or brokers, Finance applies appropriate validation procedures to substantiate fair value. For price validation purposes, quotations from at least two independent pricing sources are obtained for each financial instrument, where possible. The following factors are considered in determining fair values: • similarities between the asset or the liability under consideration and the asset or liability for which quotation is received; • collaboration of pricing by referencing to other independent market data such as market transactions and relevant benchmark indices; • consistency among different pricing sources; • the valuation approach and the methodologies used by the independent pricing sources in determining fair value; • the elapsed time between the date to which the market data relates and the measurement date; • the source of the fair value information; and • whether the security is traded in an active or inactive market. Greater weight is given to quotations of instruments with recent market transactions, pricing quotes from dealers who stand ready to transact, quotations provided by market-makers who structured such instrument and market consensus pricing based on inputs from a large number of survey participants. Any significant discrepancies among the external quotations are reviewed and adjustments to fair values are recorded where appropriate. Where the transaction volume of a specific instrument has been reduced and the fair value measurement becomes less transparent, Finance will apply more detailed procedures to understand and challenge the appropriateness of the unobservable inputs and the valuation techniques used by the independent pricing service. Where applicable, Finance will develop a fair value estimate using its own pricing model inputs to test reasonableness. Where fair value measurements are determined using internal valuation models, Finance will validate the fair value measurement by either developing unobservable inputs based on the industry consensus pricing surveys in which we participate or back testing by observing the actual settlements occurring soon after the measurement date. Assets and Liabilities Recorded at Fair Value on a Recurring Basis The following table presents information about our assets and liabilities measured at fair value on a recurring basis at December 31, 2021 and 2020, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. Unless otherwise noted below, assets and liabilities in the following table are recorded at fair value through net income (loss). Fair Value Measurements on a Recurring Basis December 31, 2021 Level 1 Level 2 Level 3 Gross Netting (6) Net (in millions) Assets: Trading assets, excluding derivatives: U.S. Treasury, U.S. Government agencies and sponsored enterprises $ 2,337 $ 432 $ — $ 2,769 $ — $ 2,769 Debt securities issued by foreign entities 134 33 — 167 — 167 Equity securities 15,795 — — 15,795 — 15,795 Precious metals trading — 3,907 — 3,907 — 3,907 Derivatives: (1) Interest rate contracts 8 1,839 1 1,848 — 1,848 Foreign exchange contracts — 11,350 — 11,350 — 11,350 Equity contracts — 1,845 213 2,058 — 2,058 Precious metals contracts 4 936 — 940 — 940 Credit contracts — 28 — 28 — 28 Other contracts (2) — — 5 5 — 5 Derivatives netting — — — — (14,788) (14,788) Total derivatives 12 15,998 219 16,229 (14,788) 1,441 Securities available-for-sale: (3) U.S. Treasury, U.S. Government agencies and sponsored enterprises 10,817 22,049 — 32,866 — 32,866 Asset-backed securities: Home equity — — 19 19 — 19 Other — — 101 101 — 101 Debt securities issued by foreign entities 2,201 111 — 2,312 — 2,312 Loans held for sale (4) — 48 — 48 — 48 Other assets: Mortgage servicing rights — — 16 16 — 16 Equity securities — 144 — 144 — 144 Equity securities measured at net asset value (5) — — — 138 — 138 Total assets $ 31,296 $ 42,722 $ 355 $ 74,511 $ (14,788) $ 59,723 Liabilities: Domestic deposits (4) $ — $ 2,214 $ 535 $ 2,749 $ — $ 2,749 Trading liabilities, excluding derivatives 1,103 46 — 1,149 — 1,149 Derivatives: (1) Interest rate contracts 10 1,888 1 1,899 — 1,899 Foreign exchange contracts — 11,124 2 11,126 — 11,126 Equity contracts — 1,194 167 1,361 — 1,361 Precious metals contracts — 779 — 779 — 779 Credit contracts — 80 2 82 — 82 Other contracts (2) — — 38 38 — 38 Derivatives netting — — — — (13,287) (13,287) Total derivatives 10 15,065 210 15,285 (13,287) 1,998 Long-term debt (4) — 7,089 1,853 8,942 — 8,942 Total liabilities $ 1,113 $ 24,414 $ 2,598 $ 28,125 $ (13,287) $ 14,838 Fair Value Measurements on a Recurring Basis December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (6) Net (in millions) Assets: Trading assets, excluding derivatives: U.S. Treasury, U.S. Government agencies and sponsored enterprises $ 5,145 $ 192 $ — $ 5,337 $ — $ 5,337 Asset-backed securities: Collateralized debt obligations — 63 — 63 — 63 Residential mortgages — — 15 15 — 15 Student loans — 65 — 65 — 65 Debt securities issued by foreign entities 7,953 18 — 7,971 — 7,971 Equity securities 6,043 — — 6,043 — 6,043 Precious metals trading — 4,989 — 4,989 — 4,989 Derivatives: (1) Interest rate contracts 15 6,637 35 6,687 — 6,687 Foreign exchange contracts — 18,452 15 18,467 — 18,467 Equity contracts — 5,051 565 5,616 — 5,616 Precious metals contracts — 1,323 — 1,323 — 1,323 Credit contracts — 298 69 367 — 367 Other contracts (2) — — 8 8 — 8 Derivatives netting — — — — (29,616) (29,616) Total derivatives 15 31,761 692 32,468 (29,616) 2,852 Securities available-for-sale: (3) U.S. Treasury, U.S. Government agencies and sponsored enterprises 22,880 12,528 — 35,408 — 35,408 Asset-backed securities: Home equity — — 27 27 — 27 Other — — 104 104 — 104 Debt securities issued by foreign entities 1,942 3,191 — 5,133 — 5,133 Loans (4) — 32 — 32 — 32 Loans held for sale (4) — 36 — 36 — 36 Other assets: Mortgage servicing rights — — 7 7 — 7 Equity securities — 149 — 149 — 149 Equity securities measured at net asset value (5) — — — 135 — 135 Total assets $ 43,978 $ 53,024 $ 845 $ 97,982 $ (29,616) $ 68,366 Liabilities: Domestic deposits (4) $ — $ 3,509 $ 646 $ 4,155 $ — $ 4,155 Trading liabilities, excluding derivatives 727 2,312 — 3,039 — 3,039 Derivatives: (1) Interest rate contracts 9 6,615 1 6,625 — 6,625 Foreign exchange contracts — 18,597 6 18,603 — 18,603 Equity contracts — 3,845 446 4,291 — 4,291 Precious metals contracts 28 1,550 — 1,578 — 1,578 Credit contracts — 291 6 297 — 297 Other contracts (2) — — 67 67 — 67 Derivatives netting — — — — (28,914) (28,914) Total derivatives 37 30,898 526 31,461 (28,914) 2,547 Long-term debt (4) — 10,277 448 10,725 — 10,725 Total liabilities $ 764 $ 46,996 $ 1,620 $ 49,380 $ (28,914) $ 20,466 (1) Includes trading derivative assets of $1,405 million and $2,801 million and trading derivative liabilities of $1,874 million and $2,358 million at December 31, 2021 and 2020, respectively, as well as derivatives held for hedging and commitments accounted for as derivatives. See Note 16, "Derivative Financial Instruments," for additional information. Excluding changes in fair value of a derivative instrument associated with a qualifying cash flow hedge, which are recognized initially in other comprehensive income (loss), derivative assets and liabilities are recorded at fair value through net income (loss). (2) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares. (3) Securities available-for-sale are recorded at fair value through other comprehensive income (loss). Changes in the allowance for credit losses on securities available-for-sale are recorded through net income (loss). (4) See Note 17, "Fair Value Option," for additional information. Excluding the fair value movement on fair value option liabilities attributable to our own credit spread, which is recorded in other comprehensive income (loss), fair value option assets and liabilities are recorded at fair value through net income (loss). (5) Investments that are measured at fair value using the net asset value per share practical expedient have not been classified in the fair value hierarchy. (6) Represents counterparty and cash collateral netting which allow the offsetting of amounts relating to certain contracts if certain conditions are met. Information on Level 3 assets and liabilities The following table summarizes additional information about changes in the fair value of Level 3 assets and liabilities during 2021 and 2020. As a risk management practice, we may risk manage the Level 3 assets and liabilities, in whole or in part, using securities and derivative positions that are classified as Level 1 or Level 2 measurements within the fair value hierarchy. Since those Level 1 and Level 2 risk management positions are not included in the table below, the information provided does not reflect the effect of such risk management activities related to the Level 3 assets and liabilities. Jan. 1, Total Realized / Unrealized Gains Purch- Issu- Settle- Transfers Transfers Dec. 31, Current Period Unrealized Gains Earnings Other Compre- Earnings Other Compre- (in millions) Assets: Trading assets, excluding derivatives: (1) Residential mortgage asset-backed securities $ 15 $ 9 $ — $ — $ — $ — $ — $ (24) $ — $ — $ — Derivatives, net: (2) Interest rate contracts 34 (34) — — — — — — — (4) — Foreign exchange contracts 9 (11) — — — — — — (2) — — Equity contracts 119 (214) — — — 84 (27) 84 46 14 — Credit contracts 63 (65) — — — — — — (2) (2) — Other contracts (3) (59) (2) — — — 28 — — (33) — — Asset-backed securities available-for-sale (4) 131 — (3) — — (8) — — 120 — (3) Mortgage servicing rights (5) 7 — — — 9 — — — 16 — — Total assets $ 319 $ (317) $ (3) $ — $ 9 $ 104 $ (27) $ 60 $ 145 $ 8 $ (3) Liabilities: Domestic deposits (6) $ (646) $ (16) $ 2 $ — $ — $ 184 $ (151) $ 92 $ (535) $ (16) $ 2 Long-term debt (6) (448) (35) — — (1,732) 408 (100) 54 (1,853) (13) — Total liabilities $ (1,094) $ (51) $ 2 $ — $ (1,732) $ 592 $ (251) $ 146 $ (2,388) $ (29) $ 2 Jan. 1, Total Realized / Unrealized Gains Purch- Issu- Settle- Transfers Transfers Dec. 31, Current Period Earnings Other Compre- Earnings Other Compre- (in millions) Assets: Trading assets, excluding derivatives: (1) Residential mortgage asset-backed securities $ 17 $ (2) $ — $ — $ — $ — $ — $ — $ 15 $ (2) $ — Corporate and other domestic debt securities 510 (13) — — — (497) — — — — — Derivatives, net: (2) Interest rate contracts 10 23 — — — — 1 — 34 23 — Foreign exchange contracts (1) (1) — — — — 11 — 9 (1) — Equity contracts 72 129 — — — (47) (37) 2 119 147 — Credit contracts 59 7 — — — (3) — — 63 (7) — Other contracts (3) (75) (9) — — — 25 — — (59) — — Asset-backed securities available-for-sale (4) 111 — (9) — — 1 28 — 131 — (9) Mortgage servicing rights (5) 4 (2) — — 5 — — — 7 (2) — Total assets $ 707 $ 132 $ (9) $ — $ 5 $ (521) $ 3 $ 2 $ 319 $ 158 $ (9) Liabilities: Domestic deposits (6) $ (774) $ (15) $ (2) $ — $ (43) $ 125 $ — $ 63 $ (646) $ (20) $ (2) Long-term debt (6) (354) (12) — — (262) 159 (1) 22 (448) (30) — Total liabilities $ (1,128) $ (27) $ (2) $ — $ (305) $ 284 $ (1) $ 85 $ (1,094) $ (50) $ (2) (1) Gains (losses) on trading assets, excluding derivatives are included in trading revenue in the consolidated statement of income (loss). (2) Level 3 net derivatives included derivative assets of $219 million and derivative liabilities of $210 million at December 31, 2021 and derivative assets of $692 million and derivative liabilities of $526 million at December 31, 2020. Gains (losses) on derivatives, net are predominantly included in trading revenue and gain (loss) on instruments designated at fair value and related derivatives in the consolidated statement of income (loss). (3) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares. Gains (losses) on these swap agreements are included in other income (loss) in the consolidated statement of income (loss). (4) Realized gains (losses) on securities available-for-sale are included in other securities gains, net in the consolidated statement of income (loss). Changes in the allowance for credit losses on securities available-for-sale are included in the provision for credit losses in the consolidated statement of income (loss). Unrealized gains (losses) on securities available-for-sale are included in other comprehensive income (loss). (5) Gain (losses) on mortgage servicing rights are included in other income (loss) in the consolidated statement of income (loss). (6) Excluding unrealized gains (losses) on fair value option liabilities attributable to our own credit spread, which are recorded in other comprehensive income (loss), gains (losses) on fair value option liabilities are included in gain (loss) on instruments designated at fair value and related derivatives in the consolidated statement of income (loss). Significant Unobservable Inputs for Recurring Fair Value Measurements The following table presents quantitative information about the unobservable inputs used to determine the recurring fair value measurement of assets and liabilities classified as Level 3 fair value measurements at December 31, 2021 and 2020: December 31, 2021 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Interest rate derivative contracts $ — Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model Probability to fund for rate lock commitments 36% - 99% 83% Interest rate yield curve 8% N/A Foreign exchange derivative contracts (2) $ (2) Option pricing model Implied volatility of currency pairs 0% - 9% 6% Cross-currency basis (86)bps N/A Equity derivative contracts (2) $ 46 Option pricing model Equity / Equity Index volatility 8% - 85% 40% Equity / Equity and Equity / Index correlation 44% - 98% 81% Equity dividend yields and forward price (4)% - 1% 0% Credit derivative contracts $ (2) Option pricing model and, where applicable, discounted cash flows Credit default swap spreads 76bps - 325bps 234bps Other derivative contracts $ (33) Discounted cash flows Conversion rate 1.6 times N/A Expected duration 1.0 year N/A Asset-backed securities available-for-sale $ 120 Discounted cash flows Market assumptions related to yields for comparable instruments 3% - 4% 3% Mortgage servicing rights $ 16 Discounted cash flows Constant prepayment rates 10% - 16% 12% Discount rate 8% - 13% 8% Estimated annualized costs to service $72 - $85 per account $75 per account Domestic deposits (structured deposits) (2)(3) $ (535) Option adjusted discounted cash flows Equity / Equity Index volatility 8% - 21% 15% Equity / Equity and Equity / Index correlation 49% - 85% 62% Long-term debt (structured notes) (2)(3) $ (1,853) Option adjusted discounted cash flows Implied volatility of currency pairs 0% - 9% 6% Equity / Equity Index volatility 8% - 71% 31% Equity / Equity and Equity / Index correlation 44% - 98% 82% Credit default swap spreads 798bps N/A December 31, 2020 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Residential mortgage asset-backed securities $ 15 Broker quotes or consensus pricing and, where applicable, discounted cash flows Prepayment rates 10% N/A Conditional default rates 5% N/A Loss severity rates 65% N/A Discount margin 500bps N/A Interest rate derivative contracts $ 34 Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model Probability to fund for rate lock commitments 41% - 100% 78% Likelihood of transaction being executed 90% N/A Interest rate yield curve 4% - 7% 6% Foreign exchange derivative contracts (2) $ 9 Option pricing model Implied volatility of currency pairs 9% - 11% 10% Cross-currency basis (9)bps - 40bps 24bps Equity derivative contracts (2) $ 119 Option pricing model Equity / Equity Index volatility 0% - 67% 27% Equity / Equity and Equity / Index correlation 17% - 62% 30% Equity dividend yields and forward price (1)% - 0% 0% Credit derivative contracts $ 63 Option pricing model and, where applicable, discounted cash flows Credit default swap spreads 150bps N/A Other derivative contracts $ (59) Discounted cash flows Conversion rate 1.6 times N/A Expected duration 2 years N/A Asset-backed securities available-for-sale $ 131 Discounted cash flows Market assumptions related to yields for comparable instruments 4% N/A Mortgage servicing rights $ 7 Discounted cash flows Constant prepayment rates 17% - 26% 19% Discount rate 9% - 10% 9% Estimated annualized costs to service $73 - $157 per account $76 per account Domestic deposits (structured deposits) (2)(3) $ (646) Option adjusted discounted cash flows Implied volatility of currency pairs 9% - 11% 10% Equity / Equity Index volatility 0% - 42% 15% Equity / Equity and Equity / Index correlation 43% - 47% 45% Long-term debt (structured notes) (2)(3) $ (448) Option adjusted discounted cash flows Implied volatility of currency pairs 9% - 11% 10% Equity / Equity Index volatility 0% - 67% 23% Equity / Equity and Equity / Index correlation 32% - 62% 52% (1) For foreign exchange derivatives, equity derivatives, credit derivatives, structured deposits and structured notes, weighted averages are calculated based on the fair value of the instruments. For all remaining instrument types, weighted averages are calculated based on the notional value of the instruments. (2) We are the client-facing entity and, except for structured notes and deposits with embedded credit derivative features, we enter into identical but opposite derivatives to transfer the resultant risks to our affiliates. With the exception of counterparty credit risks, we are market risk neutral in substantially all of the structured notes and deposits. The corresponding intra-group derivatives are presented as equity derivatives and foreign exchange derivatives in the table. (3) Structured deposits and structured notes contain embedded derivative features whose fair value measurements contain significant Level 3 inputs. See equity and foreign exchange derivatives and credit derivatives below for a discussion of the uncertainty of Level 3 inputs related to structured deposits and structured notes. N/A Not Applicable Uncertainty of Level 3 Inputs to Fair Value Measurements Interest rate derivatives - For mortgage rate lock commitments, the fair value measurement is affected by the probability of executing and funding the mortgage. An increase (decrease) in the likelihood of a mortgage being executed would have resulted in a lower (higher) fair value measurement of the interest rate derivative. For certain other interest rate derivatives, the interest rates for longer dated tenors were not observable. An increase (decrease) in the interest rate would have resulted in a higher (lower) fair value measurement of the derivative depending on if we receive or pay the floating rate. Equity and foreign exchange derivatives - The fair value measurement of a structured equity or foreign exchange derivative is primarily affected by the implied volatility of the underlying equity price or exchange rate of the paired foreign currencies. The level of volatility is a function of the nature of the underlying risk, the level of strike price and the years to maturity of the option. Depending on the underlying risk and tenure, we determine the implied volatility based on observable input where information is available. However, substantially all of the implied volatilities are derived based on historical information and are not observable. A significant increase (decrease) in the implied volatility would have resulted in a higher (lower) fair value of a long position in the derivative contract. For a derivative referenced to a basket of variables such as equities or foreign currencies, the fair value measurement is also affected by the correlation of the referenced variables. Correlation measures the relative change in values among two or more variables (i.e., equity or foreign currency pair), which can be positively or negatively correlated. A majority of the correlations are not observable, but are derived based on historical data. A significant increase (decrease) in the correlation of the referenced variables would have resulted in a higher (lower) fair value of a long position in the derivative contract. For certain other foreign exchange derivatives, the cross-currency basis for longer dated tenors were not observable. An increase (decrease) in the cross-currency basis would have resulted in a higher (lower) fair value measurement of the derivative depending on if we receive or pay the floating rate plus the basis spread. Credit derivatives - The fair value measurement of certain credit derivatives is primarily affected by the credit spreads of credit default swap contracts. A significant increase (decrease) in the credit spreads would have resulted in a lower (higher) fair value measurement of the credit derivative. Other derivatives - The fair value of the swap agreements we entered into in conjunction with the sales of Visa Class B Shares is dependent upon the final resolution of the related litigation. Significant unobservable inputs used in the fair value measurement include estimated changes in the conversion rate of Visa Class B Shares into Visa Class A Shares and the expected timing of the final resolution. An increase (decrease) in the loss estimate or in the timing of the resolution of the related litigation would have resulted in a higher (lower) fair value measurement of the derivative. Asset-backed securities available-for-sale - The fair value measurement of certain asset-backed securities is primarily affected by estimated yields which are determined based on current market yields of comparable instruments adjusted for market liquidity. An increase (decrease) in the yields would have resulted in a lower (higher) fair value measurement of the securities. Mortgage servicing rights - The fair value measurement of mortgage servicing rights is primarily affected by the estimated prepayment rates of the mortgage loans and the discount rates. An increase (decrease) in either of these inputs would have resulted in a lower (higher) fair value measurement of the mortgage servicing rights. Significant Transfers Into and Out of Level 3 Measurements During 2021, we transferred $92 million of domestic deposits and $54 million of long-term debt, which we have elected to carry at fair value, from Level 3 to Level 2 as a result of the embedded derivative no longer being unobservable as the derivative option is closer to maturity and there is more observability in short term volatility. During 2021, we also transferred $24 million of residential mortgage asset-backed securities and $84 million of equity derivatives from Level 3 to Level 2 as the inputs used to value these securities and derivative contracts have become more observable. During 2021, we transferred $151 million of domestic deposits and $100 million of long-term debt, which we elected to carry at fair value, from Level 2 to Level 3 as a result of a change in the observability of underlying inputs that resulted in the embedded derivative being unobservable. Additionally, during 2021, we transferred $27 millions of equity derivatives from Level 2 to Level 3 as the inputs used to value these contracts have become less observable. During 2020, we transferred $63 million of domestic deposits and $22 million of long-term debt, which we have elected to carry at fair value, from Level 3 to Level 2 as a result of the embedded derivative no longer being unobservable as the derivative option is closer to maturity and there is more observability in short term volatility. During 2020, we also transferred $37 million of equity contracts from Level 2 to Level 3 as the inputs used to value these contracts have become less observable. Additionally, during 2020 we transferred $28 million of asset-backed securities available-for-sale from Level 2 to Level 3 due to the lack of availability of inputs in the market including independent pricing service valuations. Assets and Liabilities Recorded at Fair Value on a Non-recurring Basis Certain financial and non-financial assets are measured at fair value on a non-recurring basis and therefore, are not included in the tables above. These assets include (a) loans classified as held for sale reported at the lower of amortized cost or fair value, (b) impaired loans or assets that are written down to fair value based on the valuation of underlying collateral during the period and (c) goodwill, lease ROU assets or leasehold improvement assets that were written down during the period. These instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustment in certain circumstances (e.g., impairment). The following table presents the fair value hierarchy level within which the fair value of the financial and non-financial assets has been recorded at December 31, 2021 and 2020. The gains (losses) during 2021 and 2020 are also included. Non-Recurring Fair Value Measurements Total Gains (Losses) For the Year Ended December 31, 2021 Level 1 Level 2 Level 3 Total (in millions) Consumer loans held for sale (1) $ — $ 24 $ 1,742 $ 1,766 $ (12) Consumer loans (2) — 102 — 102 10 Commercial loans held for sale (3) — 75 68 143 (17) Commercial loans (4) — — 186 186 60 Leases (5) — — 5 5 (103) Total assets at fair value on a non-recurring basis $ — $ 201 $ 2,001 $ 2,202 $ (62) Non-Recurring Fair Value Measurements Total Gains (Losses) For the Year Ended December 31, 2020 Level 1 Level 2 Level 3 Total (in millions) Consumer loans held for sale (1) $ — $ 4 $ — $ 4 $ — Consumer loans (2) — 312 — 312 18 Commercial loans held for sale (3) — 68 — 68 (23) Commercial loans (4) — — 270 270 (169) Real estate owned (6) —

Litigation and Regulatory Matte

Litigation and Regulatory Matters	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Litigation and Regulatory Matters	Litigation and Regulatory Matters In addition to the matters described below, in the ordinary course of business, we are routinely named as defendants in, or as parties to, various legal actions and proceedings relating to activities of our current and/or former operations. These legal actions and proceedings may include claims for substantial or indeterminate compensatory or punitive damages, or for injunctive relief. In the ordinary course of business, we also are subject to governmental and regulatory examinations, information-gathering requests, investigations and proceedings (both formal and informal), certain of which may result in adverse judgments, settlements, fines, penalties, injunctions or other relief. In connection with formal and informal inquiries by these regulators, we receive numerous requests, subpoenas and orders seeking documents, testimony and other information in connection with various aspects of our regulated activities. Due to the inherent unpredictability of legal matters, including litigation, governmental and regulatory matters, particularly where the damages sought are substantial or indeterminate or when the proceedings or investigations are in the early stages, we cannot determine with any degree of certainty the timing or ultimate resolution of such matters or the eventual loss, fines, penalties or business impact, if any, that may result. We establish reserves for litigation, governmental and regulatory matters when those matters present loss contingencies that are both probable and can be reasonably estimated. Once established, reserves are adjusted from time to time, as appropriate, in light of additional information. The actual costs of resolving litigation and regulatory matters, however, may be substantially higher than the amounts reserved for those matters. Some of our exposure may be offset by applicable insurance coverage. We do not consider the possible availability of insurance coverage in determining the amounts of any accruals (although we record the amount of related insurance recoveries that are deemed probable up to the amount of the accrual). For the legal matters disclosed below, including litigation and governmental and regulatory matters, as to which a loss in excess of accrued liability is reasonably possible in future periods and for which there is sufficient currently available information on the basis of which management believes it can make a reliable estimate, we believe a reasonable estimate could be as much as $150 million for HUSI. The legal matters underlying this estimate of possible loss will change from time to time and actual results may differ significantly from this current estimate. In addition, based on the facts currently known for each of the ongoing investigations, it is not practicable at this time for us to determine the terms on which these ongoing investigations will be resolved or the timing of such resolution. As matters progress, it is possible that any fines and/or penalties could be significant. Given the substantial or indeterminate amounts sought in certain of these matters, and the inherent unpredictability of such matters, an adverse outcome in certain of these matters could have a material adverse effect on our consolidated financial statements in any particular quarterly or annual period. Credit Card Litigation Since 2005, HSBC Bank USA, HSBC Finance, HSBC North America and HSBC, as well as other banks and Visa Inc. ("Visa") and MasterCard Incorporated ("MasterCard"), have been named as defendants in a number of consolidated merchant class actions and individual merchant actions, alleging that the imposition of a no-surcharge rule by the associations and/or the establishment of the interchange fee charged for credit card transactions causes the merchant discount fee paid by retailers to be set at supracompetitive levels in violation of the federal antitrust laws. In re Payment Card Interchange Fee and Merchant Discount Antitrust Litigation , MDL 1720, E.D.N.Y. ("MDL 1720"). In 2011, MasterCard, Visa, the other defendants, including HSBC Bank USA, and certain affiliates of the defendants entered into settlement and judgment sharing agreements (the "Sharing Agreements") that provide for the apportionment of certain defined costs and liabilities that the defendants, including HSBC Bank USA and our affiliates, may incur, jointly and/or severally, in the event of an adverse judgment or global settlement of one or all of these actions. The district court granted final approval of a class settlement in 2013 and entered a Class Settlement Order and final judgment dismissing the class action. In June 2016, the U.S. Court of Appeals for the Second Circuit ("Second Circuit") issued a decision vacating class certification and approval of the class settlement in MDL 1720, concluding the class was inadequately represented by their counsel in violation of the Federal Rule of Civil Procedure governing class actions as well as the Due Process Clause of the U.S. Constitution. Specifically, the Second Circuit held that there was a conflict between two different but overlapping settlement classes: (1) an opt-out class, which permitted individual class members to forgo their share of the monetary relief and pursue individual claims; and (2) a non-opt-out class of merchants which provided injunctive relief mainly in the form of a rule change by Visa and MasterCard to allow merchants to surcharge card transactions until July 20, 2021. In June 2018, the defendants, including the HSBC entities, reached an agreement with counsel for the putative opt-out class, seeking monetary relief, to resolve all claims as filed in a third consolidated amended class action complaint in In re Payment Card Interchange Fee and Merchant Discount Antitrust Litigation , MDL 1720, E.D.N.Y. The court granted final approval of the settlement in December 2019. Certain HSBC entities are responsible for a pro rata portion of the settlement amount, for which they are reserved, pursuant to the Sharing Agreements entered into by the defendants. In January 2020, objectors to the settlement filed an appeal, which remains pending. In September 2021, the court certified a non-opt-out class, seeking injunctive relief, consisting of all persons, businesses, and other entities that accept Visa and/or MasterCard credit and/or debit cards in the United States at any time during the period between December 18, 2020 and the date of entry of any eventual final judgment in the case. Various opt-out merchants have filed individual opt-out suits in either state or federal court, most of which have been transferred to the consolidated multidistrict litigation, MDL 1720. To date, certain groups of opt-out merchants have entered into settlement agreements with the defendants in those actions and certain HSBC entities that, pursuant to the Sharing Agreements, are responsible for a pro rata portion of any judgment or settlement amount awarded in actions consolidated into MDL 1720. U.S. Commodity Futures Trading Commission ("CFTC") Investigation As previously disclosed, the CFTC is conducting an investigation of HSBC Bank USA regarding, among other issues, interest rate swap transactions related to bond issuances, which has expanded to include the use of non-HSBC approved messaging platforms for business communications. The CFTC's civil enforcement action filed in December 2019 against a now-former HSBC employee charging him with violating the Commodity Exchange Act's anti-fraud provisions in relation to a 2012 interest rate swap transaction remains ongoing. Foreign Exchange ("FX") Matters FX Opt Out Litigation In November 2018, a complaint was filed in the U.S. District Court for the Southern District of New York by several institutions that opted out of the consolidated FX action that settled in August 2018 naming, among other institutions, the same HSBC defendants that had been named in that settled consolidated action. ( Allianz Global Investors GMBH, et al. v Bank of America Corporation, et al. (the "FX Opt Out Litigation")). A motion to dismiss the third amended complaint was denied. Discovery is underway. Another putative class action making similar allegations has been pending against the HSBC defendants, as well as other defendants, in the U.S. District Court for the Southern District of New York on behalf of retail customers ( Nypl v. JPMorgan Chase, et al. ; Case No. 1:15-CV-9300). Plaintiffs have moved for class certification. It is possible that additional actions will be initiated against the HSBC entities, including HSBC Bank USA, in relation to their historical foreign exchange activities. Investigations In January 2018, following the conclusion of the Department of Justice's ("DOJ") investigation into HSBC's historical foreign exchange activities, HSBC Holdings entered into a three-year deferred prosecution agreement with the Criminal Division of the DOJ (the "FX DPA"), regarding fraudulent conduct in connection with two particular transactions in 2010 and 2011. In January 2021, HSBC Holdings exited the FX DPA and in August 2021, the charges deferred by the FX DPA were dismissed. In September 2017, HSBC and HSBC North America entered into a consent order with the FRB in connection with its investigation into HSBC Group's historical FX exchange activities, which required HSBC and HSBC North America to undertake certain remedial steps. In June 2020, the Competition Commission of South Africa, having initially referred a complaint for proceedings before the South African Competition Tribunal in February 2017, filed a revised complaint against 28 financial institutions, including HSBC Bank USA, for alleged anti-competitive behavior in the South African foreign exchange market. In August 2020, HSBC Bank USA filed an application to dismiss the revised complaint, which remains pending. Precious Metals Fix Matters In re Commodity Exchange Inc., Gold Futures and Options Trading Litigation (Gold Fix Litigation) Since 2014, numerous putative class actions have been filed in the U.S. District Court for the Southern District of New York and the Northern District of California, which were then transferred and centralized in the U.S. District Court for the Southern District of New York, naming as defendants HSBC USA, HSI, HSBC and HSBC Bank plc, in addition to other members of the London Gold Fix. The complaints allege that from January 2004 through June 2013, defendants conspired to manipulate the price of gold and gold derivatives during the afternoon London Gold Fix in order to reap profits on proprietary trades. In November 2020, the HSBC defendants entered into a settlement agreement with the plaintiffs to resolve the consolidated action. HSBC Bank USA is fully reserved for its portion of the settlement. The court granted preliminary approval of the settlement, which remains subject to final court approval. In re London Silver Fixing, Ltd. Antitrust Litigation (Silver Fix Litigation) In 2014, putative class actions were filed in the U.S. District Court for the Southern and Eastern Districts of New York naming HSBC, HSBC Bank plc, HSBC Bank USA and the other members of The London Silver Market Fixing Ltd as defendants. The complaints allege that, from January 2007 through December 2013, defendants conspired to manipulate the price of physical silver and silver derivatives for their collective benefit in violation of the U.S. Commodity Exchange Act and U.S. antitrust laws. The actions have been transferred to and centralized in the U.S. District Court for the Southern District of New York. The parties are proceeding under a third amended complaint. The plaintiffs have moved for class certification. Platinum and Palladium Fix Litigation Since 2014, several putative class actions have been filed in the U.S. District Court for the Southern District of New York naming as defendants members of The London Platinum and Palladium Fixing Company (the "Platinum Group Metals or PGM Fixing"), including HSBC Bank USA, BASF Metals Limited, Goldman Sachs International and Standard Bank, plc. The complaints allege that, from January 2008 through November 2014, defendants conspired to manipulate the benchmark prices for physical Platinum Group Metals ("PGM") and PGM-based financial products. In March 2020 the court granted the defendants' joint motion to dismiss the third amended complaint. Plaintiffs have filed an appeal, which remains pending. Canada Litigation Beginning in December 2015, HSBC, HSBC Bank plc, HSBC USA, HSI, HSBC Bank Canada and HSBC Securities Canada have been named, along with other institutions, in several putative class actions filed in the Superior Courts of Justice in the Provinces of Ontario and Quebec, Canada. These suits allege, among other things, that the defendants conspired to manipulate the prices of gold and silver derivatives. These claims include: (1) DiFilippo and Caron v. The Bank of Nova Scotia, et al. (Superior Court of Justice, Ontario Province) (Gold Fix); (2) DiFilippo and Caron v. The Bank of Nova Scotia, et al. (Superior Court of Justice, Ontario Province) (Silver Fix); (3) Benoit v. Bank of Nova Scotia, et al. (Superior Court of Justice, Quebec Province) (Gold Fix); and (4) Ayas v. La Banque de Nouvelle-Ecosse, et. al. (Superior Court of Justice, Quebec Province) (Silver Fix). These actions are proceeding. Madoff Litigation In 2008, Bernard L. Madoff ("Madoff") was arrested and ultimately pleaded guilty to running a Ponzi scheme and a trustee was appointed for the liquidation of his firm, Bernard L. Madoff Investment Securities LLC ("Madoff Securities"), an SEC-registered broker-dealer and investment adviser. Various non-U.S. HSBC companies provided custodial, administration and similar services to a number of funds incorporated outside the United States whose assets were invested with Madoff Securities. Plaintiffs (including funds, funds investors and the Madoff Securities trustee ("Trustee"), as described below) have commenced Madoff-related proceedings against numerous defendants arising out of Madoff Securities' fraud. In 2010, the Trustee commenced suits against various HSBC companies in the U.S. Bankruptcy Court for the Southern District of New York ("U.S. Bankruptcy Court") and in the English High Court. The Trustee filed a suit in the U.S. captioned Picard v. HSBC et al (Bankr S.D.N.Y. Case No. 09-01364), which also names certain funds, investment managers, and other entities and individuals, against HSBC Bank USA and certain of our foreign affiliates. The Trustee's claims seek recovery of prepetition transfers pursuant to U.S. bankruptcy law. The amount of these claims has not been pleaded or determined as against the HSBC entities. In November 2016, the U.S. Bankruptcy Court granted the motion to dismiss with respect to certain of the Trustee's claims filed by numerous defendants, including a number of foreign affiliates of HSBC Bank USA. In February 2019, the Second Circuit reversed that dismissal and remanded the cases to the US Bankruptcy Court. In August 2019, HSBC and other parties filed a petition for a writ of certiorari in the US Supreme Court, which was denied. The matter is now pending in the US Bankruptcy Court. The Trustee's English action, which names HSBC Bank USA and other HSBC entities as defendants, seeks recovery of unspecified transfers of money from Madoff Securities to or through the HSBC entities. The Trustee's deadline for serving the claims has been extended through September 2022 for the U.K.-based defendants and November 2022 for all other defendants. Beginning in 2009, Fairfield Sentry Limited, Fairfield Sigma Limited and Fairfield Lambda Limited (together "Fairfield"), funds whose assets were directly or indirectly invested with Madoff Securities, commenced multiple suits in the British Virgin Islands ("BVI") and the United States against numerous fund shareholders, including various HSBC companies that acted as nominees for clients of HSBC's private banking business and other clients who invested in the Fairfield funds, seeking restitution of payments made in connection with share redemptions. The Fairfield liquidators voluntarily discontinued their actions against the HSBC defendants in BVI. In December 2018, the U.S. Bankruptcy Court issued a decision that partially granted defendants' motion to dismiss claims by the Fairfield liquidators and granted a motion by the liquidators to file amended complaints. In May 2019, the liquidators appealed certain issues from the U.S. Bankruptcy Court opinion to the US District Court for the Southern District of New York. The HSBC defendants also filed motions to dismiss the remaining claims in the US Bankruptcy Court in March 2020. In December 2020, the US Bankruptcy Court granted in part and denied in part the HSBC defendants' motion to dismiss. The liquidators appealed certain issues from the December 2020 ruling and that appeal is consolidated with the earlier appeal to the Southern District of New York. The consolidated appeal remains pending. There are many factors that may affect the range of possible outcomes, and the resulting financial impact, of the various Madoff-related proceedings including, but not limited to, the circumstances of the fraud, the multiple jurisdictions in which proceedings have been brought and the number of different plaintiffs and defendants in such proceedings. The timing and resolution of these matters remains uncertain. It is possible that any liabilities that may arise as a result could be significant. In any event, we consider that we have good defenses to these claims and will continue to defend them vigorously. Benchmark Rate Litigation USD LIBOR: HSBC, HSBC Bank plc, HSBC USA and/or HSBC Bank USA are among several defendants in lawsuits filed by the following plaintiffs seeking unspecified damages arising from the alleged artificial suppression of U.S. dollar LIBOR rates: (1) the Federal Home Loan Mortgage Corporation; (2) the FDIC, in its role as receiver for several failed banks; and (3) the National Credit Union Administration Board, in its capacity as liquidator for several failed credit unions. The other defendants in the actions are members of the U.S. dollar LIBOR panel of banks and their affiliates. These actions are part of the U.S. dollar LIBOR Multi-District Litigation proceeding pending in the U.S. District Court for the Southern District of New York ( In re LIBOR-Based Financial Instruments Antitrust Litigation ). During 2018, the U.S. District Court for the Southern District of New York granted final approval of the settlements with those who purchased USD LIBOR-indexed interest rate swaps and other instruments from certain non-defendant financial institutions and U.S. based lending institutions that made or purchased USD LIBOR indexed loans. The remaining settlements are subject to final court approval. In December 2021, the National Credit Union Administration reached an agreement with HSBC to resolve its litigation. That matter is now concluded and will no longer be reported. Intercontinental Exchange ("ICE") LIBOR: In January 2019, a putative class action complaint was filed in the U.S. District Court for the Southern District of New York on behalf of persons who purchased over the counter instruments paying interest indexed to ICE LIBOR from a panel bank against HSBC Bank plc, HSBC Bank USA, HSBC North America, HSBC USA and HSI, as well as other panel banks, alleging a conspiracy to depress USD ICE LIBOR from February 2014 (when ICE began administration of LIBOR) to the present. The complaint alleges, among other things, misconduct related to the suppression of the benchmark rate in violation of U.S. antitrust and state law. In March 2020 the court granted the defendants' joint motion to dismiss in its entirety. In February 2022, the Second Circuit dismissed the plaintiff's appeal. ( In Re: ICE LIBOR Antitrust Litigation. (Case No. 19-cv-00439)). Mortgage Securitization Matters In addition to the repurchase risk described in Note 28, "Guarantee Arrangements, Pledged Assets and Repurchase Agreements," HSBC Bank USA has also been involved as a sponsor/seller of loans used to facilitate whole loan securitizations underwritten by HSI. During 2005-2007, HSBC Bank USA purchased and sold $24 billion of whole loans to HSI which were subsequently securitized and sold by HSI to third parties. The outstanding principal balance on these loans was approximately $2.7 billion and $3.1 billion at December 31, 2021 and 2020, respectively. Participants in the U.S. mortgage securitization market that purchased and repackaged whole loans have been the subject of lawsuits and governmental and regulatory investigations and inquiries, which have been directed at groups within the U.S. mortgage market, such as servicers, originators, underwriters, trustees or sponsors of securitizations, and at particular participants within these groups. We expect activity in this area to continue. As the industry's residential mortgage foreclosure issues continue, HSBC Bank USA has taken title to a number of foreclosed homes as trustee on behalf of various securitization trusts. As nominal record owner of these properties, HSBC Bank USA has been sued by municipalities and tenants alleging various violations of law, including laws regarding property upkeep and tenants' rights. While we believe and continue to maintain that the obligations at issue and any related liability are properly those of the servicer of each trust, we continue to receive significant and adverse publicity in connection with these and similar matters, including foreclosures that are serviced by others in the name of "HSBC, as trustee." In 2013, Deutsche Bank National Trust Company ("DBNTC"), as trustee of HASCO 2007-NC1, filed a complaint in New York County Supreme Court, State of New York, naming HSBC Bank USA as the sole defendant. The complaint alleges that DBNTC brought the action at the direction of certificateholders of the trust, seeking specific performance and/or damages of at least $508 million arising out of the alleged breach of various representations and warranties made by HSBC Bank USA in the applicable pooling and servicing agreement regarding certain characteristics of the mortgage loans contained in the trust. HSBC Bank USA moved to dismiss the amended complaint, and that motion was denied in November 2015. HSBC Bank USA appealed and in December 2017, the appeals court issued a decision dismissing the complaint. In November 2019, an agreement was reached to resolve the dispute, and the settlement amount was fully reserved at that time. In March 2021, the parties finalized the settlement of the matter and the matter will no longer be reported. Mortgage Securitization Trust Litigation Since 2014, Plaintiff-Investors in 280 RMBS trusts (the "Trusts") have sued HSBC Bank USA, as mortgage securitization trustee, in a number of cases: BlackRock et al., Royal Park Investments SA/NV ("RPI"), Phoenix Light SF Limited, the National Credit Union Administration Board, as Liquidating Agent ("NCUA"), Commerzbank AG, Triaxx, IKB Bank AG ("IKB"), RMBS Recovery Holdings I, LLC, et al. ("Fir Tree"), VRS Holdings 2 LLC ("VRS"), Reliance Standard Life Insurance Company ("Reliance") and Park Royal LLC ("Park Royal"). A number of the cases have been deemed related and are assigned to the same judge in the U.S. District Court for the Southern District of New York. The IKB, VRS, Reliance and Park Royal cases are pending in New York State court and Fir Tree filed cases in both New York and Virginia state courts. The lawsuits were brought derivatively on behalf of the Trusts, but some also seek class relief. The complaints allege generally that the Trusts have collectively sustained losses in collateral value of approximately $38 billion and seek to recover unspecified damages as a result of alleged breach of contract; breach of the federal Trust Indenture Act and New York's Streit Act; tort claims such as negligence, negligent misrepresentation, conflict of interest and breach of fiduciary duty. The cases brought by BlackRock, RPI, Triaxx and Commerzbank have been settled on a confidential basis and dismissed. HSBC Bank USA reached an agreement in principle with NCUA to resolve NCUA's action, and the case was dismissed in January 2022. The impact of the settlement was not material to our results of operations. HSBC Bank USA's motions to dismiss the other outstanding cases have largely been denied, although motions to dismiss remain pending in the actions brought by Park Royal and by VRS and Reliance in New York state court, and those motions remain pending. Discovery is underway in a number of matters. In the Fir Tree matter, a trial is currently scheduled for September 2022. Two new lawsuits have been recently filed in New York State Supreme Court: (i) Freedom Trust 2011-2 and ARI Investments, which alleges a single cause of action, breach of contract, for the trustee's failure to accept a reasonable indemnity and enforce putback rights concerning one trust (ACE 2006-FM1) before the expiration of the statute of limitations; and (ii) Mark Zittman, who alleges that the trustee for three trusts knew about and failed to cure material document defects, which have adversely impacted the servicer's ability to foreclose on defaulting borrowers. Both cases are in the early stages. Similar lawsuits have been filed against other non-HSBC financial institutions that similarly served as mortgage securitization trustees. Anti-Terrorism Act Cases Charlotte Freeman, et al. v. HSBC Holdings plc, et al. In 2014, a complaint was filed in the U.S. District Court for the Eastern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between April 2004 and November 2011. The complaint was filed against HSBC, HSBC Bank USA, HSBC Bank plc and HSBC Bank Middle East Limited, as well as other non-HSBC banks, and alleges that the defendants conspired to violate the federal Anti-Terrorism Act., (18 U.S.C. §2331 et seq.) ("ATA"), by altering or falsifying payment messages involving Iran, Iranian parties and Iranian banks for transactions processed through the U.S. Defendants filed a motion to dismiss in March 2015. Plaintiffs filed amended complaints thereafter, which defendants moved to dismiss in September 2016. In September 2019, the district court granted defendants' motion to dismiss. Plaintiffs have appealed the decision, which remains pending. In December 2018, a new action captioned Charlotte Freeman, et al. v. HSBC Holdings plc, et al. was filed in the U.S. District Court for the Eastern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between 2004 and 2011 (" Freeman II "). Freeman II is substantially similar to the original Freeman action and has been designated as related to that action but includes additional plaintiffs and claims not asserted in the original Freeman action. The defendants filed a motion to dismiss, which the court granted in June 2020. Plaintiffs may appeal the decision. Mary Zapata, et al. v. HSBC Holdings plc, et al. In February 2016, a group of plaintiffs claiming to be survivors and heirs of American nationals alleged to have been killed or injured in Mexico by Mexican drug cartels, filed a complaint in the U.S. District Court for the Southern District of Texas, Brownsville Division naming HSBC, HSBC Bank USA, HSBC México S.A., Institución de Banca Múltiple, Grupo Financiero HSBC and Grupo Financiero HSBC, S.A. de C.V. as defendants. Plaintiffs allege that the HSBC defendants violated the ATA by providing financial services to individuals and entities associated with the drug cartels. Plaintiffs seek unspecified, treble damages. In September and October 2017, the court dismissed claims against HSBC, HSBC Mexico S.A., Institucion de Banca Multiple, Grupo Financiero HSBC and Grupo Financiero HSBC, S.A. de C.V. for lack of personal jurisdiction while denying HSBC Bank USA's motion to transfer the case to the U.S. District Court for the Southern District of New York. Plaintiffs thereafter voluntarily dismissed the Texas action. In November 2017, the plaintiffs filed an action in the U.S. District Court for the Eastern District of New York naming HSBC, HSBC Bank USA, HSBC México S.A., Institución de Banca Múltiple, Grupo Financiero HSBC and Grupo Financiero HSBC, S.A. de C.V. as defendants with allegations substantially similar to the prior pending action. In October 2019, the court granted the defendants' motion to dismiss and plaintiffs appealed the decision. In October 2020 the US Court of Appeals for the Second Circuit affirmed the lower court's decision granting the defendants' motion to dismiss, and plaintiffs did not seek further review of the decision. The matter will no longer be reported. Timothy O'Sullivan, et al. v. Deutsche Bank AG, et al. In November 2017, a complaint was filed in the U.S. District Court for the Southern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between 2003 and 2011. The complaint was filed against HSBC, HSBC Bank plc, HSBC Bank USA, HSBC North America and HSBC Bank Middle East Limited, as well as other non-HSBC defendants, and alleges that the defendants conspired to violate the ATA by altering or falsifying payment messages involving Iran, Iranian parties and Iranian banks for transactions processed through the U.S. Defendants' motion to dismiss was granted in March 2019. The case remains pending as to one defendant that did not move to dismiss or otherwise respond to the complaint. In December 2018, a new action captioned Timothy O'Sullivan, et al. v. Deutsche Bank AG, et al. was filed in the U.S. District Court for the Southern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between 2003 and 2011 (" O'Sullivan II "). O'Sullivan II is substantially similar to the original O'Sullivan action and has been designated as related to that action but includes additional plaintiffs and claims not asserted in the original O'Sullivan action. This action has been stayed upon the parties’ agreement. Joel Tavera, et al. v. Deutsche Bank AG, et al. In December 2018, a complaint was filed in the U.S. District Court for the Eastern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between 2003 and 2011. The complaint was filed against HSBC, HSBC Bank plc, HSBC Bank USA, HSBC North America and HSBC Bank Middle East Limited, as well as other non-HSBC bank defendants, and alleges that the defendants conspired to violate the ATA by altering or falsifying payment messages involving Iran, Iranian parties and Iranian banks for transactions processed through the U.S. and that they aided and abetted primary violators of the ATA. This action has been stayed based upon the parties' agreement. James Donaldson v. HSBC Holdings plc, et al. In December 2018, a complaint was filed in the U.S. District Court for the Eastern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq between 2005 and 2009. The complaint was filed against HSBC, HSBC Bank plc, HSBC Bank USA, and HSBC Bank Middle East Limited, as well as other non-HSBC bank defendants, and alleges that the defendants conspired to violate the ATA by altering or falsifying payment messages involving Iran, Iranian parties and Iranian banks for transactions processed through the U.S. and that they aided and abetted primary violators of the ATA. This action has been filed as related to the original Freeman action. This action has been stayed based upon the parties' agreement. Kathleen Stephens v. HSBC Holdings plc, et al. In December 2018, a complaint was filed in the U.S. District Court for the Eastern District of New York on behalf of representatives of U.S. persons killed and/or injured in Iraq in 2007. The complaint was filed against HSBC, HSBC Bank plc, HSBC Bank USA, and HSBC Bank Middle East Limited, as well as other non-HSBC bank defendants, and alleges that the defendants conspired to violate the ATA by altering or falsifying payment messages involving Iran, Iranian parties and Iranian banks for transactions processed through the U.S. and that they aided and abetted primary violators of the ATA. This action has been filed as related to the newly filed Freeman action. This action has been stayed based upon the parties' agreement. Ryan Bowman et al. v. HSBC Holdings plc, et al. In April 2019, a new action in the U.S. District Court for the Eastern District of New York was filed against HS

Financial Statements of HSBC US

Financial Statements of HSBC USA Inc. (Parent)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Financial Statements of HSBC USA Inc. (Parent)	Financial Statements of HSBC USA Inc. (Parent) Condensed parent company financial statements follow: Balance Sheet 2021 2020 (in millions) Assets: Securities held-to-maturity, net of allowance for credit losses of less than $1 million at both December 31, 2021 and 2020 (fair value of $1 million and $2 million at December 31, 2021 and 2020, respectively) $ 1 $ 2 Receivables and balances due from subsidiaries 12,944 14,585 Receivables from other HSBC affiliates 2,623 1,276 Investment in subsidiaries: Banking 20,672 21,897 Other 75 12 Other assets 153 182 Total assets $ 36,468 $ 37,954 Liabilities: Interest, taxes and other liabilities $ 48 $ 85 Payables due to subsidiaries 72 4 Payables due to other HSBC affiliates 65 32 Short-term borrowings 3,683 2,998 Short-term borrowings due to subsidiaries (1) 1,500 3,000 Long-term debt (2) 8,561 10,695 Long-term debt due to other HSBC affiliates (2) 5,499 2,849 Total liabilities 19,428 19,663 Total equity 17,040 18,291 Total liabilities and equity $ 36,468 $ 37,954 (1) Reflects borrowings from HSBC Bank USA. The outstanding balance matures in July 2023. (2) Contractual scheduled maturities for the debt over the next five years are as follows: 2022 – $2.9 billion; 2023 – $1.6 billion; 2024 – $2.0 billion; 2025 – $4.5 billion; 2026 – $0.6 billion; and thereafter – $2.5 billion. Statements of Income (Loss) and Comprehensive Income (Loss) 2021 2020 2019 (in millions) Income: Dividends from banking subsidiaries $ 102 $ 121 $ 138 Interest from subsidiaries 28 101 350 Interest from other HSBC affiliates 23 43 91 Other income from subsidiaries — — 2 Other income from other HSBC Affiliates 1,027 552 1,645 Other income (loss) (1,023) (544) (1,690) Total income 157 273 536 Expenses: Interest to subsidiaries 16 6 — Interest to other HSBC Affiliates 128 115 140 Other interest expense 40 228 549 Provision for credit losses — (1) — Other expenses with subsidiaries 19 15 12 Other expenses 1 3 5 Total expenses 204 366 706 Loss before taxes and equity in undistributed income (loss) of subsidiaries (47) (93) (170) Income tax benefit (33) (50) (78) Loss before equity in undistributed income (loss) of subsidiaries (14) (43) (92) Equity in undistributed income (loss) of subsidiaries 702 (897) 205 Net income (loss) $ 688 $ (940) $ 113 Other comprehensive income (loss) (858) 956 87 Comprehensive income (loss) $ (170) $ 16 $ 200 Statement of Cash Flows 2021 2020 2019 (in millions) Cash flows from operating activities: Net income (loss) $ 688 $ (940) $ 113 Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Depreciation and amortization 1 2 5 Net change in other assets and liabilities (313) 256 1,463 Undistributed (income) loss of subsidiaries (702) 897 (205) Other, net (4) (2) 4 Cash provided by (used in) operating activities (330) 213 1,380 Cash flows from investing activities: Sales and maturities of securities 1 — — Net change in investments in and receivables due from subsidiaries 2,713 (552) 3,929 Net change in receivables from other HSBC affiliates (1,345) 1,056 183 Other, net — — 1 Cash provided by investing activities 1,369 504 4,113 Cash flows from financing activities: Net change in payables to other HSBC affiliates 13 (1) 4 Net change in short-term borrowings (815) 3,522 (56) Issuance of long-term debt 6,844 3,394 2,931 Repayment of long-term debt (6,000) (7,565) (5,897) Return of capital to parent (1,000) — (2,400) Other increases (decreases) in capital surplus (4) 10 — Dividends paid (77) (77) (77) Cash used in financing activities (1,039) (717) (5,495) Net change in cash and due from banks and interest bearing deposits with banks — — (2) Cash and due from banks and interest bearing deposits with banks at beginning of year — — 2 Cash and due from banks and interest bearing deposits with banks at end of year $ — $ — $ — Cash paid for: Interest $ 167 $ 379 $ 662 HSBC Bank USA is subject to legal restrictions on certain transactions with its non-bank affiliates in addition to the restrictions on the payment of dividends to us. See Note 26, "Retained Earnings and Regulatory Capital Requirements," for further discussion.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies and New Accounting Pronouncements (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The consolidated financial statements include the accounts of HSBC USA and all subsidiaries in which we hold, directly or indirectly, more than 50 percent of the voting rights, or where we exercise control, including all variable interest entities ("VIEs") in which we are the primary beneficiary. Investments in companies where we have significant influence over operating and financing decisions, which primarily are those where the percentage of ownership is at least 20 percent but not more than 50 percent, are accounted for under the equity method and reported as equity method investments in other assets. All significant intercompany accounts and transactions have been eliminated. We assess whether an entity is a VIE and, if so, whether we are its primary beneficiary at the time of initial involvement with the entity and on an ongoing basis. A VIE is an entity in which the equity investment at risk is not sufficient to finance the entity's activities without additional subordinated financial support, or as a group, the holders of equity investment at risk lack either a) the power through voting rights or similar rights to direct the activities of the entity that most significantly impacts the entity's economic performance; or b) the obligation to absorb the entity's expected losses, the right to receive the expected residual returns, or both. A VIE must be consolidated by its primary beneficiary, which is the entity with the power to direct the activities of a VIE that most significantly impact its economic performance and the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Areas which we consider to be critical accounting estimates and require a high degree of judgment and complexity include allowance for credit losses, goodwill impairment, valuation of financial instruments and deferred tax asset valuation allowances. Certain reclassifications have been made to prior period amounts to conform to the current period presentation.
Cash and Cash Equivalents	Cash and Cash Equivalents For the purpose of reporting cash flows, cash and cash equivalents include both cash and due from banks and interest bearing deposits with banks, which are inclusive of any restricted cash. Prior to 2020, restricted cash represented required reserve balances maintained with the Federal Reserve Bank. In 2020, the Federal Reserve Board ("FRB") announced it had eliminated its reserve requirement.
Resale and Repurchase Agreements	Resale and Repurchase Agreements We enter into purchases and borrowings of securities under agreements to resell (resale agreements) and sales of securities under agreements to repurchase (repurchase agreements) substantially identical securities. Resale and repurchase agreements are accounted for as secured lending and secured borrowing transactions, respectively. The amounts advanced under resale agreements and the amounts borrowed under repurchase agreements are carried on the consolidated balance sheet at the amount advanced or borrowed. Interest earned on resale agreements is reported as interest income. Interest paid on repurchase agreements is reported as interest expense. We offset resale and repurchase agreements executed with the same counterparty under legally enforceable netting agreements that meet the applicable netting criteria as permitted by generally accepted accounting principles. Repurchase agreements may require us to deposit cash or other collateral with the lender. In connection with resale agreements, it is our policy to obtain possession of collateral, which may include the securities purchased, with market value in excess of the principal amount loaned. The market value of the collateral subject to the resale and repurchase agreements is regularly monitored, and additional collateral is obtained or provided when appropriate, to ensure appropriate collateral coverage of these secured financing transactions.
Trading Assets and Liabilities	Trading Assets and Liabilities Financial instruments utilized in trading activities are stated at fair value. Fair value is generally based on quoted market prices. If quoted market prices are not available, fair values are estimated based on dealer quotes, pricing models, using observable inputs where available or quoted prices for instruments with similar characteristics. Where applicable, fair value is determined by reference to quotes provided by multiple independent pricing services. Fair value determined by internal pricing models is regularly substantiated by the price level executed in the market and the internal pricing models used are periodically validated by an internal Independent Model Review ("IMR") team. Realized and unrealized gains and losses are recognized in trading revenue.
Securities	Securities Securities acquired principally for the purpose of selling them in the near term are classified as trading assets and reported at fair value. Fair value adjustments to trading securities and gains and losses on the sale of such securities are reported in trading revenue. Debt securities that we have the ability and intent to hold to maturity are reported at cost adjusted for amortization of premiums and accretion of discounts, which are recognized as adjustments to yield over the contractual lives of the related securities. Premiums for non-contingently callable debt securities are amortized to the earliest call date, rather than the contractual maturity date. All other debt securities are classified as available-for-sale ("AFS") and carried at fair value, with unrealized gains and losses, net of related income taxes, recorded as adjustments to common equity as a component of accumulated other comprehensive income (loss). Accrued interest receivables for securities available-for-sale and securities held-to-maturity are reported net of any related allowance for credit losses in other assets on the consolidated balance sheet. Realized gains and losses on sales of securities available-for-sale are computed on a specific identified cost basis and are reported in other securities gains, net. Beginning January 1, 2020, an allowance for credit losses is recognized for debt securities, with changes in the allowance recorded in earnings. Prior to January 1, 2020, debt securities were assessed for other-than-temporary impairment. Other-than-temporary impairments were recorded as a direct write-down of the security’s amortized cost basis. During 2019, none of our debt securities were determined to be other-than-temporarily impaired. See under the heading "Allowance for credit losses" below for further discussion of our policies for establishing an allowance for credit losses on debt securities. Equity securities that are not classified as trading are reported in other assets and measured at fair value with changes in fair value recognized in other income (loss). Equity securities that are not considered to have readily determinable fair values are carried at amortized cost, less impairment, adjusted for observable price changes. Investments in Federal Home Loan Bank stock and Federal Reserve Bank stock are recorded at cost less impairment.
Loans	Loans Loans are carried at amortized cost, with the exception of certain student loans for which the fair value option was elected beginning January 1, 2020 and are further discussed in Note 17, "Fair Value Option." These student loans were transferred to held for sale during the fourth quarter of 2021. Amortized cost represents the principal amount outstanding, net of unearned income, charge-offs, unamortized purchase premium or discount, unamortized nonrefundable fees and related direct loan origination costs and purchase accounting fair value adjustments. The carrying amount of loans represents their amortized cost reduced by the allowance for credit losses. See under the heading "Allowance for Credit Losses" below for further discussion of our policies for establishing an allowance for credit losses on loans. Premiums and discounts and purchase accounting fair value adjustments are recognized as adjustments to yield over the estimated or contractual lives of the related loans. Interest income is recorded based on the effective interest method. Accrued interest receivables for loans are reported net of any related allowance for credit losses in other assets on the consolidated balance sheet. For credit card receivables, accrued interest is recognized in the loan balance as it is billed, with the related allowance recorded in the allowance for credit losses on loans. Nonrefundable fees and related direct costs associated with the origination of loans are deferred and netted against outstanding loan balances. The amortization of net deferred fees, which include points on real estate secured loans and costs, is recognized in interest income, generally by the interest method, based on the estimated or contractual lives of the related loans. Amortization periods are periodically adjusted for loan prepayments and changes in other market assumptions. Annual fees on credit cards, net of direct lending costs, are deferred and amortized on a straight-line basis over one year. Nonrefundable fees related to lending activities other than direct loan origination are recognized in other revenues over the period in which the related service is provided. This includes fees associated with loan commitments, revolving credit facilities, standby letters of credit, loan syndication and other transaction based fees. Loan syndication fees received for managing a syndication and other transaction based fees are recognized at the point in time the transaction occurs. Fees associated with loan commitments, revolving credit facilities and standby letters of credit are recognized on a straight-line basis over the period the service is performed. In the event a loan commitment or standby letter of credit is exercised, the remaining unamortized fee is recognized as an adjustment to yield over the loan term. For additional information, as well as a full discussion of how revenue associated with all of our various fee-based activities is recognized, see Note 23, "Fee Income from Contracts with Customers." Troubled debt restructurings ("TDR Loans") represent loans for which the original contractual terms have been modified to provide for terms that are less than we would be willing to accept for new loans with comparable risk because of deterioration in the borrower's financial condition. Interest on TDR Loans is recognized when collection is reasonably assured. For commercial nonaccrual TDR Loans, the resumption of interest accrual generally occurs when the borrower has complied with the modified payment terms and conditions for twelve months while maintaining compliance with other terms and conditions of that specific restructuring. For consumer nonaccrual TDR Loans, interest accruals are resumed when the loan becomes current or becomes less than 90 days delinquent and six months of consecutive payments have been made. Modifications resulting in TDR Loans may include changes to one or more terms of the loan, including but not limited to, a change in interest rate, an extension of the amortization period, a reduction in payment amount and partial forgiveness or deferment of principal, accrued interest or other loan covenants. For reserving purposes, beginning in 2020, we also identify loans that we reasonably expect to become TDR Loans. See under the heading "Allowance for Credit Losses" below for further discussion. Coronavirus ("COVID-19") Loan Forbearance Initiatives We implemented various loan modification programs to provide borrowers relief from the economic impacts of the COVID-19 pandemic. In 2020, the Coronavirus Aid, Relief and Economic Security Act ("CARES Act") was signed into law, which provided financial institutions with the option to temporarily suspend certain requirements under U.S. GAAP related to TDR Loans beginning March 1, 2020. This TDR Loan guidance expired on January 1, 2022. We elected to adopt the TDR Loan guidance in the CARES Act and did not apply TDR Loan classification to COVID-19 related loan modifications in the form of a long-term payment deferral (for commercial loans all payment modifications, including all payment deferrals) granted to borrowers that were current (less than 30 days past due) as of December 31, 2019 which otherwise may have been reported as TDR Loans. In 2020, federal banking regulators issued a revised interagency statement on loan modifications and the reporting for financial institutions working with customers affected by the COVID-19 pandemic ("Interagency Statement"). The Interagency Statement confirmed that COVID-19 related short-term loan modifications (e.g., payment deferrals of six months or less) provided to borrowers that were current (less than 30 days past due) at the time the relief was granted were not TDR Loans. Borrowers that did not meet the criteria in the CARES Act or the Interagency Statement were assessed for TDR Loan classification in accordance with our accounting policies.
Allowance for Credit Losses	Allowance for Credit Losses Beginning January 1, 2020, an allowance for credit losses is recognized based on lifetime expected credit losses ("lifetime ECL") for loans, securities held-to-maturity and certain other financial assets measured at amortized cost, and an allowance for credit losses is also recognized for securities available-for-sale. Prior to January 1, 2020, an allowance for credit losses was recognized based on probable incurred losses for loans only while debt securities were assessed for other-than-temporary impairment. In addition, beginning January 1, 2020, the liability for off-balance sheet credit exposures is recognized based on lifetime ECL while, prior to January 1, 2020, it was recognized based on probable incurred losses. Expected recoveries of amounts previously written off, limited to the cumulative amount of prior write-offs, are also considered when estimating the allowance for credit losses for in scope financial assets (including collateral-dependent assets). Prior to January 1, 2020, these expected recoveries were not recognized. We maintain an allowance for credit losses that is, in the judgment of management, adequate to absorb estimated lifetime ECL for loans and other financial assets measured at amortized cost. The adequacy of the allowance for credit losses is assessed in accordance with generally accepted accounting principles and is based, in part, upon an evaluation of various factors including: • an analysis of individual exposures where applicable; • current and historical loss experience; • changes in the overall size and composition of the portfolio; • specific adverse situations; and • general and forecasted economic conditions. Allowance for credit loss estimates are reviewed periodically and adjustments are recognized in the provision for credit losses during the period they become known. Because our estimates of the allowance for credit losses involve management judgment and are influenced by factors outside of our control, there is uncertainty inherent in these estimates. Measurement of ECL Estimates The recognition and measurement of lifetime ECL is highly complex and involves the use of significant judgment and estimation. Multiple forward-looking economic forecasts are formulated and incorporated into the lifetime ECL calculations when estimating the allowance for credit losses for in scope financial assets and the liability for off-balance sheet credit exposures as discussed below under Calculation of Lifetime ECL . We utilize a standard framework to form economic scenarios to reflect assumptions about future economic conditions supplemented by the use of management judgment, which may result in using alternative or additional economic scenarios and/or management adjustments. Methodology HUSI has adopted the use of a minimum of three forward-looking economic scenarios, representative of management's view of forecasted economic conditions, sufficient to calculate unbiased expected loss in most economic environments. They represent a 'most likely outcome' (the "Central scenario") and two less likely 'outer' scenarios, referred to as the "Upside scenario" and the "Downside scenario". Each scenario is assigned a weighting with the significant majority of the weighting placed on the Central scenario and lower equal weights placed on the Upside and Downside scenarios. This weighting is deemed appropriate for the estimation of lifetime ECL in most economic environments, unless determined otherwise. At management's discretion, changes may be made to the weighting assigned to the three scenarios or additional scenarios may be included in order to consider current economic conditions. See Note 8, "Allowance for Credit Losses," for further discussion. Key Central scenario assumptions as further discussed below are set using the average of forecasts of external economists, helping to ensure the scenarios are unbiased and maximize the use of independent information, except when in management's judgment these scenarios may not adequately reflect the impact of recent events and it is believed not to be representative of the current economic environment. The Central, Upside and Downside scenarios selected with reference to external forecast distributions using the above approach are termed the "Consensus Economic Scenarios". We have determined that two years is a reasonable and supportable forecast period for the Consensus Economic Scenarios. At the end of the two year reasonable and supportable forecast period, assumption variables start to revert to their 20-year average of historical values over a reversion period. The reversion period for most assumption variables is generally three years, but is longer in some specific cases. The reversion path for this period is linear for all variables. For the Central scenario, we set key assumptions such as Gross Domestic Product ("GDP") growth, inflation, unemployment, house price growth, U.S. Treasury yields, equity price growth, short-term interest rates and oil price using either the average of external forecasts (commonly referred to as consensus forecasts) or market implied rates. An external provider's model, conditioned to follow the consensus forecasts for the above key assumption variables, projects the remaining variable paths required as inputs to credit models. This external provider is subject to our risk governance framework, including oversight by an internal IMR team. The Upside and Downside scenarios are constructed following a standard process supported by a scenario narrative reflecting our top and emerging risks and by consulting external and internal subject matter experts. They are designed to be cyclical in that GDP growth, inflation and unemployment usually revert back to the Central scenario after the first two years. We determine the maximum divergence of GDP growth from the Central scenario using the 10th and the 90th percentile of the entire distribution of consensus forecast outcomes. Using externally available forecast distributions ensures independence in scenario construction. Key economic variables are set with reference to external distributional forecasts and we project additional variable paths using the external provider's model. Generally, the Upside and Downside scenarios are generated at year-end and are only updated during the year if economic conditions change significantly. The Central scenario is generated every quarter. In quarters where only the Central scenario is updated, the Upside and Downside scenarios used for commercial loans are adjusted such that the relationship between the key assumptions used in the Central scenario and the Upside and Downside scenarios in the quarter is consistent with that observed at the last full scenario generation. For consumer loans, in quarters where only the Central scenario is updated, the relationship between the Central scenario and the Upside and Downside scenarios is held constant with that observed at the last full scenario generation. As a result of the deterioration of economic conditions and economic uncertainty caused by the COVID-19 pandemic, beginning in the second quarter of 2020 and throughout 2021, we have been updating our three Consensus Economic Scenarios as well as a fourth scenario, referred to as the "Alternative Downside Scenario", every quarter. See Note 8, "Allowance for Credit Losses," for further discussion summarizing the key macroeconomic variable forecasts used in our economic scenarios as well as a discussion of updates to the economic scenarios and other changes during 2021. We exclude from our lifetime ECL calculation financial assets for which we expect that non-payment of the amortized cost basis will be zero ("Zero Expected Credit Loss Exception"). As a result, no allowance for credit losses is recorded for these financial assets. We have identified the following types of financial assets which we believe qualify for this exclusion: • U.S. Treasury securities; • U.S. Government agency issued or guaranteed securities; • U.S. Government sponsored enterprises securities; • G10 sovereign foreign debt securities; • Interest bearing deposits held with the Federal Reserve Bank; and • Loans guaranteed by a U.S. Government agency or U.S. Government sponsored enterprise, including Paycheck Protection Program ("PPP") loans. We also exclude from our lifetime ECL calculation financial assets which are secured by collateral maintenance provisions (e.g., the borrower is contractually required to adjust the amount of financial collateral securing the financial asset) if such collateral meets liquidity requirements. In most circumstances subject to such requirements, collateral exceeds our amortized cost basis and no allowance for credit losses is recorded for these financial assets, consisting of the substantial majority of our securities purchased under agreements to resell as well as substantially all of our margin loans provided to our private banking customers. In addition, loans to other HSBC affiliated entities are exempt from ECL measurement. Calculation of Lifetime ECL Commercial loans Commercial loans are monitored on a continuous basis with a formal assessment completed, at a minimum, annually. As part of this process, a credit rating is assigned and a loss given default ("LGD") is estimated and serve as the basis for establishing an allowance for these loans' expected balance at default ("EAD") based on a probability of default ("PD") estimate associated with each credit rating under our credit risk policies. In assigning the credit ratings to a particular loan, among the risk factors considered are the obligor's debt capacity and financial position, the level of earnings, the amount and sources for repayment, the level of contingencies, management strength and the industry or geography in which the obligor operates. We utilize a consistent methodology for the application of forward economic guidance ("FEG") into the calculation of lifetime ECL by incorporating FEG into the estimation of the term structure of PD and LGD. For PDs, we consider the correlation of FEG to default rates for a particular industry. For LGDs, we consider the correlation of FEG to collateral values and realization rates for a particular industry and if applicable, country which is adjusted for recoveries. Our PD estimates are validated on an annual basis using back-testing of actual default rates and benchmarking of the internal ratings with external rating agency data like Standard and Poor's ("S&P") ratings and default rates. PDs and LGDs are estimated for the entire term structure of the loan. Credit Review, a function independent of the business, provides an on-going assessment of lending activities that includes independently assessing credit ratings and LGD estimates for sampled credits across various portfolios. Loans with similar risk characteristics are pooled for determining lifetime ECL. When it is deemed probable based upon known facts and circumstances that full interest and principal on an individual loan will not be collected in accordance with its contractual terms, in general the loan is no longer considered part of the collective pool of homogeneous loans against which lifetime ECL are established. Instead, an allowance for credit losses is established on an individual basis ("individually assessed") primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or the fair value of the collateral if the loan is collateral dependent. Individually assessed loans are evaluated quarterly. Generally, loans that are placed on non-accrual must be removed from a collective pool and individually assessed. In addition, the allowance for credit losses reflects management judgment of risk factors that may not be fully reflected in the lifetime ECL generated by our models. In making this determination, we consider the characteristics of our portfolio and any other significant factors that are relevant. Factors that are relevant to determining the expected collectability of our loan portfolio include, but are not limited to, the volume and severity of past due loans, the volume and severity of adversely classified or rated loans, the underlying collateral on loans that are not collateral dependent, lending policies and procedures including changes in lending strategies, underwriting standards or collection and recovery practices as well as the obligor's operations, environmental factors of an obligor and the areas in which our credit exposure is concentrated, the non-homogeneous nature of the portfolio, changes and expected changes in the general market condition of either a geographical area or an industry, and changes in international, national, regional, and local economic and business conditions. For loans which have been identified as TDR Loans, including beginning in 2020 loans which we reasonably expect to become TDR Loans, judgment will be used as to whether or not we expect full repayment of principal and interest. If full repayment is expected, the loan will remain in a collective pool of homogeneous loans for determining lifetime ECL. When full repayment of principal and interest is not expected or, beginning in 2020, when we anticipate offering payment concessions, the loan will be removed from the pool and individually assessed. If a commercial TDR Loan subsequently performs in accordance with the new terms and the loan is upgraded, it is possible the loan will no longer be reported as a TDR Loan at the earliest one year after the restructure had been anticipated. Consumer loans For pools of homogeneous consumer loans and certain small business loans, we estimate lifetime ECL using a component based framework based on PD, LGD and EAD that estimates the likelihood that a loan will progress through the various stages of delinquency and ultimately charge-off based upon a forward-looking view of macro-economic expectations that impact a lifetime ECL and historical experience. The impact of FEG on PD is modeled at the loan or segment level depending on the portfolio. Historic relationships between observed default rates and macroeconomic variables are integrated into lifetime ECL estimates by leveraging economic response models. The impact of FEG on PD is modeled over a period equal to the remaining maturity of the underlying loans. The impact on LGD is modeled for mortgage portfolios by forecasting future loan-to-value ("LTV") profiles for the remaining maturity of the loans by leveraging national forecasts of the House Price Index ("HPI") and applying the corresponding LGD expectation. The models consider delinquency status, loss experience and severity, and take into account where borrowers have historically filed for bankruptcy or have been subject to account management actions, such as the re-age or modification of accounts. Expected loss severity is based on the underlying collateral, if any, for the loan in the event of default based on historical and recent trends which are updated periodically based on a rolling average of several months' data using the most recently available information and is typically in the range of 20-40 percent for residential mortgages and 70-100 percent for home equity mortgages. The lifetime ECL recognized for consumer loans considers the effect on lifetime ECL over a range of potential outcomes, calculated on a probability-weighted basis, based on the economic scenarios described above, including management judgment where required. Management judgment reflects consideration of risk factors that may not be fully reflected in the lifetime ECL generated by our models. In making this determination, we consider the characteristics of our portfolio and any other significant factors that are relevant. Factors that are relevant to determining the expected collectability of our consumer loan portfolio include, but are not limited to, changes in risk selection or underwriting standards, changes in collection, account management, charge-off and recovery practices, changes in loan concentrations affecting either the frequency or severity of losses, and changes in economic conditions. For loans which have been identified as TDR Loans, including beginning in 2020, loans which we reasonably expect to become TDR Loans, an allowance for credit losses is maintained primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or the fair value of the collateral if the loan is collateral dependent. Once a loan is classified as a TDR Loan, it continues to be reported as such until it is paid off or charged-off. Off-balance sheet credit exposures A separate liability for off-balance sheet credit exposures is also maintained, which is recorded in interest, taxes and other liabilities on the consolidated balance sheet and includes estimated lifetime ECL arising from off-balance sheet exposures such as letters of credit and unused commitments to extend credit. The process for measuring lifetime ECL on these exposures is consistent with that for commercial or consumer loans discussed above as applicable, but is subject to an additional parameter reflecting the likelihood that funding will occur. No lifetime ECL is recognized for off-balance sheet credit exposures that are unconditionally cancellable by us such as unused credit card lines. Securities held-to-maturity Due to the composition of our portfolio of securities held-to-maturity, substantially all of our portfolio qualifies for the Zero Expected Credit Loss Exception and has been excluded from our lifetime ECL calculation. Our methodology for calculating lifetime ECL for our securities held-to-maturity which do not qualify for the Zero Expected Credit Loss Exception is consistent with our methodology for calculating lifetime ECL for loans discussed above, including the use of probability-weighted scenarios, forward economic guidance and key model inputs. We calculate lifetime ECL for securities held-for-maturity based on the present value of expected future cash flows, discounted using the contractual interest rate which approximates the effective interest rate. Securities available-for-sale On a quarterly basis, we perform an assessment to determine whether there have been any events or economic circumstances to indicate that a debt security available-for-sale in an unrealized loss position has suffered impairment due to credit factors. A debt security available-for-sale is considered impaired if its fair value is less than its amortized cost basis at the reporting date. If impaired, we assess whether the impairment is due to credit factors. If we intend to sell the debt security or if it is more-likely-than-not that we will be required to sell the debt security before the recovery of its amortized cost basis, the impairment is recognized and the unrealized loss is recorded as a direct write-down of the security's amortized cost basis with an offsetting entry to earnings. If we do not intend to sell the debt security or believe we will not be required to sell the debt security before the recovery of its amortized cost basis, the impairment is assessed to determine if a credit loss component exists. We use a discounted cash flow method to determine the credit loss component. In the event a credit loss exists, an allowance for credit losses is recorded in earnings for the credit loss component of the impairment while the remaining portion of the impairment attributable to factors other than credit loss is recognized, net of tax, in other comprehensive income (loss). The amount of impairment recognized due to credit factors is limited to the excess of the amortized cost basis over the fair value of the security available-for-sale. Allowance for credit losses prior to 2020 Prior to January 1, 2020, we maintained an allowance for credit losses that was, in the judgment of management, adequate to absorb estimated probable incurred losses in our commercial and consumer loan portfolios. Formula-based reserves were established against commercial loans when, based upon an analysis of relevant data, it was probable that a loss had been incurred and the amount of that loss could be reasonably estimated, even though an actual loss had yet to be identified. This methodology used the PD from the credit rating assigned to each counterparty together with the estimated loss emergence period (estimate of the period of time between a loss occurring and the confirming event of its charge-off) of the separate portfolios. The LGD rating assigned to each transaction or facility was based on the collateral securing the transaction and the measure of exposure based on the transaction. When it was deemed probable based upon known facts and circumstances that full interest and principal on an individual loan would not be collected in accordance with its contractual terms, the loan was considered impaired and an impairment reserve was established primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or as a practical expedient, the fair value of the collateral if the loan was collateral dependent or the loan's observable market price if the loan was traded in the market. For pools of homogeneous consumer loans and certain small business loans which did not qualify as TDR Loans, we estimated probable losses using a roll rate migration analysis that estimated the likelihood that a loan would progress through the various stages of delinquency and ultimately charge-off. This migration analysis incorporated estimates of the period of time between a loss occurring and the confirming event of its charge-off. In addition, loss reserves on consumer and commercial loans were maintained to reflect our judgment of portfolio risk factors which may not have been fully reflected in the statistical calculations or when historical trends were not reflective of current inherent losses in the portfolio. For loans which had been identified as TDR Loans, provisions for credit losses were maintained primarily based on the present value of expected future cash flows, discounted at the loan's original effective interest rate, or as a practical expedient, the fair value of the collateral if the loan was collateral dependent or, for commercial loans, the observable market price if the loan was traded in the market. A separate reserve was also maintained for probable incurred credit losses associated with off-balance sheet credit exposures. This reserve was determined by reference to continuously monitored and updated historical loss rates or factors, derived from a migration analysis which considered net charge-off experience by loan and industry type in relation to internal credit rating.
Charge-Off and Nonaccrual Policies and Practices	Charge-Off and Nonaccrual Policies and Practices Our charge-off and nonaccrual policies differ by product and are summarized below: Product Charge-off Policies and Practices Nonaccrual Policies and Practices Commercial Loans Real estate, including construction Business and corporate banking Global banking Other commercial Commercial loan balances are charged off at the time all or a portion of the balance is deemed uncollectible. For loans secured with collateral, loan balances are generally written down to the estimated fair value of the collateral less costs to sell. Loans are generally categorized as nonaccruing when contractually delinquent for more than three months or in the opinion of management, reasonable doubt exists with respect to the ultimate collectibility of interest or principal based on certain factors including the period of time past due and adequacy of collateral. When classified as nonaccruing, any accrued interest recorded on the loan is generally deemed uncollectible and reversed against income. Interest income is subsequently recognized only to the extent of cash received until the loan is placed on accrual status. In instances where there is doubt as to collectibility of principal, interest payments received are applied to principal. Loans are not reclassified as accruing until interest and principal payments are current and future payments are reasonably assured. Residential Mortgage Loans Carrying amounts in excess of fair value less costs to sell are generally charged off at the time foreclosure is initiated or when settlement is reached with the borrower, but not to exceed the end of the month in which the account becomes six months contractually delinquent. If foreclosure is not pursued and there is no reasonable expectation for recovery, the account is generally charged off no later than the end of the month in which the account becomes six months contractually delinquent. (1) Loans are generally designated as nonaccruing when contractually delinquent for more than three months. When classified as nonaccruing, any accrued interest on the loan is generally deemed uncollectible and reversed against income. Interest accruals are resumed when the loan either becomes current or becomes less than three months delinquent and six months of consecutive payments have been made. (2) Credit Cards Loan balances are generally charged off by the end of the month in which the account becomes six months contractually delinquent. (3) Interest generally accrues until charge-off. Other Consumer Loans Loan balances are generally charged off by the end of the month in which the account becomes four months contractually delinquent. Interest generally accrues until charge-off. (1) Values are determined based upon broker price opinions or appraisals which are updated at least every 180 days less estimated costs to sell. During the quarterly period between updates, real estate price trends are reviewed on a geographic basis and additional downward adjustments are recorded as necessary. Fair values of foreclosed properties at the time of acquisition are initially determined based upon broker price opinions. Subsequent to acquisition, a more detailed property valuation is performed, reflecting information obtained from a walk-through of the property in the form of a listing agent broker price opinion as well as an independent broker price opinion or appraisal. A valuation is determined from this information within 90 days and any additional write-downs required are recorded through charge-off at that time. In determining the appropriate amounts to charge-off when a property is acquired in exchange for a loan, we do not consider losses on sales of foreclosed properties resulting from deterioration in value during the period the collateral is held because these losses result from future loss events which cannot be considered in determining the fair value of the collateral at the acquisition date. (2) As discussed further under the heading "Loans" above, for COVID-19 related loan modifications, when a borrower utilized a payment deferral of more than six months, the loan was generally placed on nonaccrual status. Any accrued interest recorded on these loans was generally not reversed against income and remained recorded as accrued interest receivable. (3) Charge-offs involving a bankruptcy for credit card receivables occurs by the end of the month, 60 days after notification or 180 days contractually delinquent, whichever comes first. Due to the composition of our debt securities portfolio, a substantial majority of which comprises U.S. Government securities, we typically do not charge them off or place them on nonaccrual status. Delinquency status for loans is determined using the contractual method which is based on the status of payments under the loan. An account is generally considered to be contractually delinquent when payments have not been made in accordance with the loan terms. Delinquency status may be affected by customer account management policies and practices such as the restructure, re-age or modification of accounts. For COVID-19 related loan modifications in the form of a payment deferral, the borrower's past due status was not affected during the deferral period. Payments received on commercial nonaccrual loans are generally applied to reduce the principal balance of such loans. For consumer nonaccrual loans, payments are generally applied first to reduce the current interest on the earliest payment due with any remainder applied to reduce the principal balance associated with that payment date.
Loans Held-for-Sale	Loans Held for Sale Loans are classified as held for sale when they are not expected to be held for the foreseeable future because of management's lack of intent to hold. With the exception of certain loans for which the fair value option has been elected and are further discussed in Note 17, "Fair Value Option," loans classified as held for sale are recorded at the lower of amortized cost or estimated fair value, which is not in excess of their carrying value at the time of designation. Consumer loans are valued on an aggregate portfolio basis while commercial loans are generally valued on an individual loan basis. Periodic adjustments to fair value are recognized in other income (loss) in the consolidated statement of income (loss). For loans other than those classified as nonaccrual, interest income is determined by applying each loan's contractual rate to the loan's outstanding customer balance, exclusive of unearned income, deferred fees, deferred costs, premium and discount.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets in which we have surrendered control over the transferred assets are accounted for as sales. In assessing whether control has been surrendered, we consider whether the transferee would be a consolidated affiliate, the existence and extent of any continuing involvement in the transferred financial assets and the impact of all arrangements or agreements made contemporaneously with, or in contemplation of, the transfer, even if they were not entered into at the time of transfer. If the sale criteria are met, the transferred financial assets are removed from our balance sheet and a gain or loss on sale is recognized. If the sale criteria are not met, the transfer is recorded as a secured borrowing in which the assets remain on our balance sheet and the proceeds from the transaction are recognized as a liability. For the majority of financial asset transfers, it is clear whether or not we have surrendered control. For other transfers, such as in connection with complex transactions or where we have continuing involvement such as servicing responsibilities, we generally obtain a legal opinion as part of evaluating whether the transfer results in a sale.
Properties and Equipment, Net	Properties and Equipment, Net Properties and equipment are recorded at cost, net of accumulated depreciation. Depreciation is recorded on a straight-line basis over the estimated useful lives of the related assets, which generally range from 3 to 40 years. Leasehold improvements are depreciated over the shorter of the useful life of the improvement or the term of the lease. The costs of maintenance and repairs are expensed as incurred. Impairment testing is performed whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable.
Leases	Leases Lease right-of-use ("ROU") assets and lease liabilities for operating leases are recognized at commencement date based on the present value of lease payments over the lease term, discounted using our incremental borrowing rate at the effective commencement date of each lease. Operating lease ROU assets are recorded in other assets while operating lease liabilities are recorded in interest, taxes and other liabilities. We are not currently a lessee under any finance leases.
Goodwill and Other Long-Lived Assets	Goodwill and Other Long-Lived Assets Goodwill, representing the excess of purchase price over the fair value of identifiable net assets acquired, results from business combinations. Goodwill is not amortized, but is reviewed for impairment at a minimum on an annual basis at the reporting unit level using discounted cash flow and market approaches. The market approach focuses on valuation multiples for reasonably similar publicly traded companies and also considers recent market transactions, while the discounted cash flows method utilizes cash flow estimates based on recent internal forecasts and discount rates that we believe adequately reflect the risk and uncertainty in our internal forecasts and are appropriate based on the implicit market rates in current comparable transactions. Impairment is reviewed as of an interim date if circumstances indicate that it is more likely than not that the carrying amount of a reporting unit is above fair value. The carrying amount of a reporting unit is determined on the basis of capital invested in the unit including attributable goodwill. We determine the invested capital of a reporting unit by applying to the reporting unit's risk-weighted assets a capital charge consistent with the targets assigned and monitored through our capital management monitoring framework, and additionally, allocating to each reporting unit the remaining carrying amount of HUSI's net assets. Accordingly, the entire carrying amount of HUSI's net assets is allocated to our reporting units. Reporting units were identified based upon an analysis of each of our individual operating segments. A reporting unit is defined as an operating segment or any distinct, separately identifiable component one level below an operating segment for which complete, discrete financial information is available that management regularly reviews. We consider significant and long-term changes in industry and economic conditions to be examples of primary indicators of potential impairment. In addition, we generally conduct impairment tests of capitalized software and other long-lived assets at the reporting unit level when events or circumstances indicate their carrying amount may not be recoverable. If impairment testing is required, long-lived assets are grouped at the lowest level for which there are identifiable cash flows. If the estimated undiscounted cash flows of the long-lived asset group exceed its carrying amount, an impairment is not recognized. However, if the estimated undiscounted cash flows are less than the carrying amount of the long-lived asset group, a second step is performed to determine fair value and an impairment loss is required if the carrying amount of the long-lived asset group exceeds fair value. Impairment losses are not reversible. Fair value calculations when required are consistent with the methodology used to determine fair value for goodwill impairment.
Repossessed Collateral	Repossessed Collateral Non-financial collateral acquired in satisfaction of a loan is initially recognized at the collateral's fair value less estimated costs to sell and is reported in other assets. Any subsequent declines in fair value less estimated costs to sell are recorded through a valuation allowance. Recoveries in fair value less estimated costs to sell are recognized as a reduction of the valuation allowance but not in excess of cumulative losses previously recognized subsequent to the date of repossession. Adjustments to the valuation allowance, costs of holding repossessed collateral, and any gain or loss on disposition are credited or charged to operating expense.
Collateral	Collateral We pledge assets as collateral as required for various transactions involving security repurchase agreements, public deposits, derivative financial instruments, short-term borrowings and long-term borrowings. Non-cash assets that have been pledged as collateral, including those that can be sold or repledged by the secured party, continue to be reported on our consolidated balance sheet. We also accept collateral, primarily as part of various transactions involving security resale agreements. Non-cash collateral accepted by us, including collateral that we can sell or re-pledge, is excluded from our consolidated balance sheet. If we resell the collateral, we recognize the proceeds and a liability to return the collateral. The market value of collateral we have accepted or pledged is regularly monitored and additional collateral is obtained or provided as necessary to ensure appropriate collateral coverage in these transactions.
Derivative Financial Instruments	Derivative Financial Instruments Derivative financial instruments are recognized on the consolidated balance sheet at fair value. On the date a derivative contract is entered into, we designate it as either: • a qualifying hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge); • a qualifying hedge of the variability of cash flows to be received or paid related to a recognized asset, liability or forecasted transaction (cash flow hedge); or • a trading instrument or a non-qualifying (economic) hedge. Changes in the fair value of a derivative designated as a fair value hedge, along with the changes in the fair value of the hedged asset or liability that is attributable to the hedged risk (including losses or gains on firm commitments), are recorded in current period earnings. Changes in the fair value of a derivative that has been designated as a cash flow hedge are recorded in accumulated other comprehensive income (loss), net of income taxes, and reclassified into earnings in the period during which the hedged item affects earnings. Changes in the fair value of derivatives held for trading purposes or which do not qualify for hedge accounting are reported in current period earnings. At the inception of each designated qualifying hedge, we formally document all relationships between hedging instruments and hedged items, as well as its risk management objective and strategy for undertaking various hedge transactions, the nature of the hedged risk, and how hedge effectiveness will be assessed. This process includes linking all derivatives that are designated as fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific firm commitments or forecasted transactions. We also formally assess both at inception and on a quarterly basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in fair values or cash flows of hedged items and whether they are expected to continue to be highly effective in future periods. This assessment is conducted using statistical regression analysis. Earnings volatility may result from the on-going mark to market of certain economically viable derivative contracts that do not satisfy the hedging requirements in accordance with U.S. GAAP as well as from the hedge ineffectiveness associated with the qualifying hedges.
Embedded Derivatives	Embedded Derivatives We may acquire or originate a financial instrument that contains a derivative instrument embedded within it. Upon origination or acquisition of any such instrument, we assess whether the economic characteristics of the embedded derivative are clearly and closely related to the economic characteristics of the principal component of the financial instrument (i.e., the host contract) and whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument. When we determine that: (1) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract; and (2) a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is either separated from the host contract (bifurcated), carried at fair value, and designated as a trading instrument or the entire financial instrument is carried at fair value with all changes in fair value recorded to current period earnings. If bifurcation is elected, the consideration for the hybrid financial instrument that is allocated to the bifurcated derivative reduces the consideration that is allocated to the host contract with the difference being recognized over the life of the financial instrument.
Hedge Discontinuation	Hedge Discontinuation We discontinue hedge accounting prospectively when: • the derivative is no longer effective or expected to be effective in offsetting changes in the fair value or cash flows of a hedged item (including firm commitments or forecasted transactions) related to the designated risk; • the derivative expires or is sold, terminated, or exercised; • it is unlikely that a forecasted transaction will occur; • the hedged firm commitment no longer meets the definition of a firm commitment; or • the designation of the derivative as a hedging instrument is no longer appropriate. When hedge accounting is discontinued because it is determined that the derivative no longer qualifies as an effective fair value or cash flow hedge, the hedging relationship will cease. The hedging instrument will continue to be carried on the balance sheet at fair value, with changes in fair value recognized in current period earnings. In the case of a discontinued fair value hedge of a recognized asset or liability, as long as the hedged item continues to exist on the balance sheet, the hedged item will no longer be adjusted for changes in fair value attributable to the hedged risk. The basis adjustment that had previously been recorded to the hedged item during the period from the hedge designation date to the hedge discontinuation date is recognized as an adjustment to the yield of the hedged item over the remaining life of the hedged item. In the case of a discontinued cash flow hedge of a recognized asset or liability, as long as the hedged item continues to exist on the balance sheet, further changes in fair value of the hedging derivative will no longer be recorded in other comprehensive income (loss). The balance applicable to the discontinued hedging relationship will be recognized in earnings over the remaining life of the hedged item as an adjustment to yield. If the discontinued hedged item was a forecasted transaction where it is probable the forecasted transaction will not occur at the end of the original specified time period or within an additional two-month period thereafter, any amounts recorded in accumulated other comprehensive income (loss) are immediately reclassified to current period earnings. In the case of a cash flow hedge, if the previously hedged item is sold or extinguished, the basis adjustment to the underlying asset or liability or any remaining unamortized accumulated other comprehensive income (loss) balance will be reclassified to current period earnings. In all other situations in which hedge accounting is discontinued, the derivative will be carried at fair value on the consolidated balance sheet, with changes in its fair value recognized in current period earnings unless redesignated in a qualifying cash flow hedge.
Interest Rate Lock Commitments	Interest Rate Lock Commitments We enter into commitments to originate residential mortgage loans whereby the interest rate on the loan is set prior to funding (rate lock commitments). The interest rate lock commitments on residential mortgage loans that are classified as held for sale are considered to be derivatives and are recorded at fair value in other assets or other liabilities in the consolidated balance sheet. Changes in fair value are recorded as a component of other income (loss) in the consolidated statement of income (loss).
Share-Based Compensation	Share-Based Compensation We use the fair value based method of accounting for awards of HSBC stock granted to employees under various restricted share and employee stock purchase plans. Stock compensation costs are recognized prospectively for all new awards granted under these plans. Compensation expense relating to restricted share awards is based upon the fair value on the date of grant and is charged to earnings over the requisite service period (e.g., vesting period), less estimated forfeitures. When modeling awards with vesting that is dependent on performance conditions, these performance conditions are incorporated into the model using Monte Carlo simulation. The expected life of these awards depends on the behavior of the award holders, which is incorporated into the model consistent with historical observable data.
Pension and Other Postretirement Benefits	Pension and Other Postretirement Benefits We recognize the funded status of the postretirement benefit plans on the consolidated balance sheet. Net postretirement benefit cost charged to current earnings related to these plans is based on various actuarial assumptions regarding expected future experience. Certain employees are participants in various defined contribution, defined benefit and other supplemental retirement plans sponsored by HSBC North America. Our portion of the expense related to these plans is allocated to us and charged to current earnings. We maintain various 401(k) plans covering substantially all employees. Employer contributions to the plan, which are charged to current earnings, are based on employee contributions.
Income Taxes	Income Taxes HSBC USA is included in HSBC North America's consolidated Federal income tax return and in various combined State income tax returns. As such, we have entered into a tax allocation agreement with HSBC North America and its subsidiary entities (the "HNAH Group") which governs the current amount of taxes to be paid or received by the various entities included in the consolidated return filings. Generally, such agreements allocate taxes to members of the HNAH Group based on the calculation of tax on a separate return basis, adjusted for the utilization or limitation of credits of the consolidated group. To the extent all the tax attributes available cannot be currently utilized by the consolidated group, the proportionate share of the utilized attribute is allocated based on each affiliate's percentage of the available attribute computed in a manner that is consistent with the taxing jurisdiction's laws and regulations regarding the ordering of utilization. In addition, we file some separate company State tax returns. We recognize deferred tax assets and liabilities for the future tax consequences related to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases, and for Federal and State net operating losses. Deferred tax assets and liabilities are measured using the enacted tax rates and laws that will be in effect when the deferred tax items are expected to be realized. If applicable, valuation allowances are recorded to reduce deferred tax assets to the amounts we conclude are more likely than not to be realized. Since we are included in HSBC North America's consolidated Federal tax return and various combined State tax returns, the related evaluation of the recoverability of the deferred tax assets is performed at the HSBC North America consolidated level. We consider the HNAH Group's consolidated deferred tax assets and various sources of taxable income in reaching conclusions on recoverability of deferred tax assets. The HNAH Group evaluates deferred tax assets for recoverability using a consistent approach which considers the relative impact of negative and positive evidence, including historical financial performance, projections of future taxable income, future reversals of existing taxable temporary differences, tax planning strategies and any available carryback capacity. In evaluating the need for a valuation allowance, the HNAH Group estimates future taxable income based on management approved business plans. This process involves significant management judgment about assumptions that are subject to change from period to period. Where a valuation allowance is determined to be necessary at the HSBC North America consolidated level, such allowance is allocated to principal subsidiaries within the HNAH Group in a manner that is systematic, rational and consistent with the broad principles of accounting for income taxes. The methodology generally allocates the valuation allowance to the principal subsidiaries based primarily on the entity's relative contribution to the HNAH Group's consolidated deferred tax asset against which the valuation allowance is being recorded. Further evaluation is performed at the HSBC USA legal entity level to evaluate the need for a valuation allowance where we file separate company State income tax returns. Foreign taxes paid are applied as credits to reduce Federal income taxes payable, to the extent that such credits can be utilized. We recognize accrued interest related to uncertain tax positions in interest expense in the consolidated statement of income (loss) and recognize penalties, if any, related to uncertain tax positions as a component of other expenses in the consolidated statement of income (loss).
Transactions with Related Parties	Transactions with Related Parties In the normal course of business, we enter into transactions with HSBC and its subsidiaries. These transactions occur at prevailing market rates and terms and include funding arrangements, derivatives, servicing arrangements, information technology, centralized support services, banking and other miscellaneous services.
New Accounting Pronouncements	New Accounting Pronouncements There were no new accounting pronouncements adopted during 2021 that had a material impact on our consolidated financial statements and there have been no accounting pronouncements issued that are expected to have or could have a material impact on our consolidated financial statements.
Fair Value Hierarchy	Fair Value Hierarchy The Fair Value Framework establishes a three-tiered fair value hierarchy as follows: Level 1 quoted market price - Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 valuation technique using observable inputs - Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are inactive, and measurements determined using valuation models where all significant inputs are observable, such as interest rates and yield curves that are observable at commonly quoted intervals. Level 3 valuation technique with significant unobservable inputs - Level 3 inputs are unobservable inputs for the asset or liability and include situations where fair values are measured using valuation techniques based on one or more significant unobservable inputs. Classification within the fair value hierarchy is based on whether the lowest hierarchical level input that is significant to the fair value measurement is observable. As such, the classification within the fair value hierarchy is dynamic and can be transferred to other hierarchy levels in each reporting period. Where fair value measurements are determined based on information obtained from independent pricing services or brokers, Finance applies appropriate validation procedures to substantiate fair value. For price validation purposes, quotations from at least two independent pricing sources are obtained for each financial instrument, where possible. The following factors are considered in determining fair values: • similarities between the asset or the liability under consideration and the asset or liability for which quotation is received; • collaboration of pricing by referencing to other independent market data such as market transactions and relevant benchmark indices; • consistency among different pricing sources; • the valuation approach and the methodologies used by the independent pricing sources in determining fair value; • the elapsed time between the date to which the market data relates and the measurement date; • the source of the fair value information; and • whether the security is traded in an active or inactive market. Greater weight is given to quotations of instruments with recent market transactions, pricing quotes from dealers who stand ready to transact, quotations provided by market-makers who structured such instrument and market consensus pricing based on inputs from a large number of survey participants. Any significant discrepancies among the external quotations are reviewed and adjustments to fair values are recorded where appropriate. Where the transaction volume of a specific instrument has been reduced and the fair value measurement becomes less transparent, Finance will apply more detailed procedures to understand and challenge the appropriateness of the unobservable inputs and the valuation techniques used by the independent pricing service. Where applicable, Finance will develop a fair value estimate using its own pricing model inputs to test reasonableness. Where fair value measurements are determined using internal valuation models, Finance will validate the fair value measurement by either developing unobservable inputs based on the industry consensus pricing surveys in which we participate or back testing by observing the actual settlements occurring soon after the measurement date.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies and New Accounting Pronouncements (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Charge-Off and Nonaccrual Policies and Practices by Product	Our charge-off and nonaccrual policies differ by product and are summarized below: Product Charge-off Policies and Practices Nonaccrual Policies and Practices Commercial Loans Real estate, including construction Business and corporate banking Global banking Other commercial Commercial loan balances are charged off at the time all or a portion of the balance is deemed uncollectible. For loans secured with collateral, loan balances are generally written down to the estimated fair value of the collateral less costs to sell. Loans are generally categorized as nonaccruing when contractually delinquent for more than three months or in the opinion of management, reasonable doubt exists with respect to the ultimate collectibility of interest or principal based on certain factors including the period of time past due and adequacy of collateral. When classified as nonaccruing, any accrued interest recorded on the loan is generally deemed uncollectible and reversed against income. Interest income is subsequently recognized only to the extent of cash received until the loan is placed on accrual status. In instances where there is doubt as to collectibility of principal, interest payments received are applied to principal. Loans are not reclassified as accruing until interest and principal payments are current and future payments are reasonably assured. Residential Mortgage Loans Carrying amounts in excess of fair value less costs to sell are generally charged off at the time foreclosure is initiated or when settlement is reached with the borrower, but not to exceed the end of the month in which the account becomes six months contractually delinquent. If foreclosure is not pursued and there is no reasonable expectation for recovery, the account is generally charged off no later than the end of the month in which the account becomes six months contractually delinquent. (1) Loans are generally designated as nonaccruing when contractually delinquent for more than three months. When classified as nonaccruing, any accrued interest on the loan is generally deemed uncollectible and reversed against income. Interest accruals are resumed when the loan either becomes current or becomes less than three months delinquent and six months of consecutive payments have been made. (2) Credit Cards Loan balances are generally charged off by the end of the month in which the account becomes six months contractually delinquent. (3) Interest generally accrues until charge-off. Other Consumer Loans Loan balances are generally charged off by the end of the month in which the account becomes four months contractually delinquent. Interest generally accrues until charge-off. (1) Values are determined based upon broker price opinions or appraisals which are updated at least every 180 days less estimated costs to sell. During the quarterly period between updates, real estate price trends are reviewed on a geographic basis and additional downward adjustments are recorded as necessary. Fair values of foreclosed properties at the time of acquisition are initially determined based upon broker price opinions. Subsequent to acquisition, a more detailed property valuation is performed, reflecting information obtained from a walk-through of the property in the form of a listing agent broker price opinion as well as an independent broker price opinion or appraisal. A valuation is determined from this information within 90 days and any additional write-downs required are recorded through charge-off at that time. In determining the appropriate amounts to charge-off when a property is acquired in exchange for a loan, we do not consider losses on sales of foreclosed properties resulting from deterioration in value during the period the collateral is held because these losses result from future loss events which cannot be considered in determining the fair value of the collateral at the acquisition date. (2) As discussed further under the heading "Loans" above, for COVID-19 related loan modifications, when a borrower utilized a payment deferral of more than six months, the loan was generally placed on nonaccrual status. Any accrued interest recorded on these loans was generally not reversed against income and remained recorded as accrued interest receivable.

Strategic Initiatives (Tables)

Strategic Initiatives (Tables)	12 Months Ended
	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Total Pre-Tax Charges We Expect to Incur by Segment	The following table presents a summary of the total pre-tax charges we expect to incur by reportable segment: Expected Charges in Connection Minimum Maximum (in millions) Wealth and Personal Banking $ 215 $ 235 Commercial Banking 8 10 Markets and Securities Services 82 88 Global Banking and Markets Other 10 12 Corporate Center (1) 465 515 Total $ 780 $ 860 (1) Includes restructuring charges primarily related to lease impairment and other related costs, support service project costs and severance costs associated with certain centralized activities and functions.
Schedule of Changes in Restructuring Liability	The following table summarizes the changes in the liability associated with our Restructuring Plan during 2021 and 2020: Severance and Other Employee Costs (1) Lease Termination and Associated Costs (2) Other (3) Total (in millions) Year Ended December 31, 2021 Restructuring liability at beginning of period $ 10 $ 23 $ — $ 33 Restructuring costs accrued during the period 12 38 15 65 Restructuring costs paid during the period (12) (15) (15) (42) Restructuring liability at end of period $ 10 $ 46 $ — $ 56 Year Ended December 31, 2020 Restructuring liability at beginning of period $ — $ — $ — $ — Restructuring costs accrued during the period 28 29 — 57 Restructuring costs paid during the period (18) (6) — (24) Restructuring liability at end of period $ 10 $ 23 $ — $ 33 (1) Severance and other employee costs are included in salaries and employee benefits in the consolidated statement of income (loss). The majority of these costs were reported in the Wealth and Personal Banking business segment. Not included in these costs are allocated severance costs from HSBC Technology & Services ("HTSU") discussed further below. (2) Primarily includes real estate taxes, service charges and decommissioning costs. Lease termination and associated costs are included in occupancy expense, net in the consolidated statement of income (loss) and were reported in the Wealth and Personal Banking and the Corporate Center business segments. (3) Primarily includes professional fees and other staff costs, which are included in other expenses in the consolidated statement of income (loss).

Branch Assets and Liabilities_2

Branch Assets and Liabilities Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Assets and Liabilities Classified as Held for Sale	The following table summarizes the assets and liabilities in the disposal group classified as held for sale at December 31, 2021 in our consolidated balance sheet: December 31, 2021 (in millions) Loans held for sale (1) $ 2,441 Other branch related assets held for sale: Lease ROU assets 151 Properties and equipment, net 40 Cash and other assets 58 Total other branch related assets held for sale 249 Total branch assets held for sale (2) $ 2,690 Deposits held for sale $ 8,750 Other branch related liabilities held for sale: Lease liabilities 144 Other liabilities 8 Total other branch related liabilities held for sale 152 Total branch liabilities held for sale (2) $ 8,902 (1) Includes $72 million of commercial loans, $1,845 million of residential mortgage loans, $217 million of home equity mortgage loans, $178 million of credit card loans and $129 million of other consumer loans. (2) The sale of this disposal group will result in a net cash payment as the liabilities being assumed are greater than the assets being purchased.

Trading Assets and Liabilities

Trading Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2021
Trading Assets And Liabilities [Abstract]
Trading Assets and Liabilities	Trading assets and liabilities consisted of the following: At December 31, 2021 2020 (in millions) Trading assets: U.S. Treasury $ 2,337 $ 5,145 U.S. Government sponsored enterprises 432 192 Asset-backed securities — 143 Foreign bonds 167 7,971 Equity securities 15,795 6,043 Precious metals 3,907 4,989 Derivatives, net 1,405 2,801 Total trading assets $ 24,043 $ 27,284 Trading liabilities: Securities sold, not yet purchased $ 1,103 $ 727 Payables for precious metals 46 2,312 Derivatives, net 1,874 2,358 Total trading liabilities $ 3,023 $ 5,397

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Fair Value of the Securities Available-for-Sale and Held-to-Maturity	Our securities available-for-sale and securities held-to-maturity portfolios consisted of the following: December 31, 2021 Amortized Allowance for Credit Losses Unrealized Unrealized Fair (in millions) Securities available-for-sale: U.S. Treasury $ 9,490 $ — $ 144 $ (72) $ 9,562 U.S. Government sponsored enterprises: Mortgage-backed securities 7,365 — 114 (115) 7,364 Collateralized mortgage obligations 1,787 — 8 (48) 1,747 Direct agency obligations 1,775 — 16 (4) 1,787 U.S. Government agency issued or guaranteed: Mortgage-backed securities 8,489 — 7 (66) 8,430 Collateralized mortgage obligations 3,730 — 7 (49) 3,688 Direct agency obligations 282 — 6 — 288 Asset-backed securities collateralized by: Home equity 20 (1) — — 19 Other 107 — — (6) 101 Foreign debt securities (1) 2,311 — 3 (2) 2,312 Total available-for-sale securities $ 35,356 $ (1) $ 305 $ (362) $ 35,298 Securities held-to-maturity: U.S. Government sponsored enterprises: Mortgage-backed securities $ 684 $ — $ 21 $ — $ 705 Collateralized mortgage obligations 492 — 26 — 518 U.S. Government agency issued or guaranteed: Mortgage-backed securities 1,104 — 24 — 1,128 Collateralized mortgage obligations 2,915 — 85 (1) 2,999 Obligations of U.S. states and political subdivisions 8 — — — 8 Asset-backed securities collateralized by residential mortgages 1 (1) 1 — 1 Total held-to-maturity securities $ 5,204 $ (1) $ 157 $ (1) $ 5,359 December 31, 2020 Amortized Allowance for Credit Losses Unrealized Unrealized Fair (in millions) Securities available-for-sale: U.S. Treasury $ 16,087 $ — $ 608 $ (47) $ 16,648 U.S. Government sponsored enterprises: Mortgage-backed securities 5,986 — 280 (2) 6,264 Collateralized mortgage obligations 1,676 — 19 (2) 1,693 Direct agency obligations 1,236 — 17 — 1,253 U.S. Government agency issued or guaranteed: Mortgage-backed securities 6,993 — 152 — 7,145 Collateralized mortgage obligations 2,093 — 22 (11) 2,104 Direct agency obligations 296 — 5 — 301 Asset-backed securities collateralized by: Home equity 28 (1) — — 27 Other 114 — — (10) 104 Foreign debt securities (1) 5,127 — 6 — 5,133 Total available-for-sale securities $ 39,636 $ (1) $ 1,109 $ (72) $ 40,672 Securities held-to-maturity: U.S. Government sponsored enterprises: Mortgage-backed securities $ 1,137 $ — $ 44 $ — $ 1,181 Collateralized mortgage obligations 780 — 53 — 833 U.S. Government agency issued or guaranteed: Mortgage-backed securities 1,947 — 76 — 2,023 Collateralized mortgage obligations 5,107 — 212 — 5,319 Obligations of U.S. states and political subdivisions 10 — 1 — 11 Asset-backed securities collateralized by residential mortgages 2 (2) 2 — 2 Total held-to-maturity securities $ 8,983 $ (2) $ 388 $ — $ 9,369 (1) Foreign debt securities represent public sector entity, bank or corporate debt.
Gross Unrealized Losses and Related Fair Value	The following table summarizes gross unrealized losses and related fair values for securities available-for-sale by major security type at December 31, 2021 and 2020 classified as to the length of time the losses have existed: One Year or Less Greater Than One Year Number Gross Aggregate Number Gross Aggregate (dollars are in millions) At December 31, 2021 U.S. Treasury 11 $ (28) $ 1,784 9 $ (44) $ 856 U.S. Government sponsored enterprises 63 (155) 6,224 14 (12) 354 U.S. Government agency issued or guaranteed 59 (91) 8,972 15 (24) 769 Asset-backed securities — — — 3 (6) 101 Foreign debt securities 8 (2) 1,188 — — — Securities available-for-sale 141 $ (276) $ 18,168 41 $ (86) $ 2,080 At December 31, 2020 U.S. Treasury 5 $ (5) $ 751 13 $ (42) $ 1,271 U.S. Government sponsored enterprises 15 (3) 715 8 (1) 46 U.S. Government agency issued or guaranteed 13 (11) 1,482 3 — 8 Asset-backed securities 3 (10) 104 2 — — Foreign debt securities 6 — 766 5 — 241 Securities available-for-sale 42 $ (29) $ 3,818 31 $ (43) $ 1,566
Realized Gains and Losses on Investment Securities Transactions Attributable to Available-for-Sale Securities	The following table summarizes realized gains and losses on investment securities transactions attributable to available-for-sale securities: 2021 2020 2019 (in millions) Gross realized gains $ 159 $ 174 $ 148 Gross realized losses (86) (37) (60) Net realized gains $ 73 $ 137 $ 88
Distribution of Maturities of Debt Securities with the Approximate Yield of the Portfolio	The table below also reflects the distribution of maturities of debt securities held at December 31, 2021, together with the approximate yield of the portfolio. The yields shown are calculated by dividing annualized interest income, including the accretion of discounts and the amortization of premiums, by the amortized cost of securities outstanding at December 31, 2021. Within After One After Five After Ten Amount Yield Amount Yield Amount Yield Amount Yield (dollars are in millions) Available-for-sale: U.S. Treasury $ 246 1.99 % $ 3,364 1.38 % $ 2,075 1.39 % $ 3,805 1.87 % U.S. Government sponsored enterprises — — 1,712 1.63 2,079 2.35 7,136 1.64 U.S. Government agency issued or guaranteed 71 .24 23 1.17 1 5.54 12,406 1.83 Asset-backed securities — — — — 107 4.14 20 .23 Foreign debt securities 1,122 .10 1,189 .57 — — — — Total amortized cost $ 1,439 .43 % $ 6,288 1.30 % $ 4,262 1.93 % $ 23,367 1.78 % Total fair value $ 1,442 $ 6,340 $ 4,346 $ 23,170 Held-to-maturity: U.S. Government sponsored enterprises $ 3 2.69 % $ 179 2.64 % $ 299 2.26 % $ 695 3.31 % U.S. Government agency issued or guaranteed 1 3.51 — — 8 5.38 4,010 2.55 Obligations of U.S. states and political subdivisions 3 3.92 3 2.68 2 4.32 — — Asset-backed securities — — — — — — 1 7.52 Total amortized cost $ 7 3.33 % $ 182 2.65 % $ 309 2.36 % $ 4,706 2.66 % Total fair value $ 8 $ 184 $ 318 $ 4,849
Equity Securities Not Classified as Trading	Equity securities that are not classified as trading and are included in other assets consisted of the following: At December 31, 2021 2020 (in millions) Equity securities carried at fair value $ 282 $ 284 Equity securities without readily determinable fair values 16 14

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Components of Loans	Loans consisted of the following: At December 31, 2021 2020 (in millions) Commercial loans: Real estate, including construction $ 8,234 $ 10,464 Business and corporate banking (1) 13,958 13,479 Global banking (2) 11,109 13,519 Other commercial: Affiliates (3) 2,793 1,100 Other 3,702 3,037 Total other commercial 6,495 4,137 Total commercial 39,796 41,599 Consumer loans: Residential mortgages 15,469 18,377 Home equity mortgages 325 727 Credit cards 204 1,066 Other consumer (4) 70 319 Total consumer (5) 16,068 20,489 Total loans $ 55,864 $ 62,088 (1) Includes loans funded under the PPP which totaled $262 million and $1,043 million at December 31, 2021 and 2020, respectively. PPP loans are fully guaranteed by the Small Business Administration, if certain conditions are met. (2) Represents large multinational firms including globally focused U.S. corporate and financial institutions, U.S. dollar lending to multinational banking clients managed by HSBC on a global basis and complex large business clients supported by Global Banking and Markets relationship managers. (3) See Note 24, "Related Party Transactions," for additional information regarding loans to HSBC affiliates. (4) Included certain student loans that we have elected to designate under the fair value option and are therefore carried at fair value, which totaled $32 million at December 31, 2020. These student loans were transferred to held for sale during the fourth quarter of 2021. See Note 17, "Fair Value Option," for further details. (5) The decrease in consumer loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021. See Note 9, "Loans Held for Sale," for additional information.
Summary of Past Due Status of Loans	The following table summarizes the past due status of our loans at December 31, 2021 and 2020. The aging of past due amounts is determined based on the contractual delinquency status of payments under the loan. An account is generally considered to be contractually delinquent when payments have not been made in accordance with the loan terms. Delinquency status is affected by customer account management policies and practices such as re-age, which results in the re-setting of the contractual delinquency status to current. For COVID-19 related loan modifications in the form of a payment deferral, the borrower’s past due status was not affected during the deferral period. Past Due Total Past Due 30 Days or More 30 - 89 Days 90+ Days Current (1) Total Loans (in millions) At December 31, 2021 Commercial loans: Real estate, including construction $ 38 $ — $ 38 $ 8,196 $ 8,234 Business and corporate banking 112 17 129 13,829 13,958 Global banking — 27 27 11,082 11,109 Other commercial 47 — 47 6,448 6,495 Total commercial 197 44 241 39,555 39,796 Consumer loans: Residential mortgages 138 63 201 15,268 15,469 Home equity mortgages 2 1 3 322 325 Credit cards 5 2 7 197 204 Other consumer 1 — 1 69 70 Total consumer (2) 146 66 212 15,856 16,068 Total loans $ 343 $ 110 $ 453 $ 55,411 $ 55,864 At December 31, 2020 Commercial loans: Real estate, including construction $ 78 $ — $ 78 $ 10,386 $ 10,464 Business and corporate banking 126 19 145 13,334 13,479 Global banking — 60 60 13,459 13,519 Other commercial 24 — 24 4,113 4,137 Total commercial 228 79 307 41,292 41,599 Consumer loans: Residential mortgages 435 311 746 17,631 18,377 Home equity mortgages 11 22 33 694 727 Credit cards 23 19 42 1,024 1,066 Other consumer 7 6 13 306 319 Total consumer 476 358 834 19,655 20,489 Total loans $ 704 $ 437 $ 1,141 $ 60,947 $ 62,088 (1) Loans less than 30 days past due are presented as current. (2) The decrease in consumer past due loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $419 million of consumer loans which were past due 30 days or more at the time of transfer. See Note 9, "Loans Held for Sale," for additional information.
Contractual Maturities of Loans Outstanding	Contractual maturities of loans outstanding at December 31, 2021 were as follows: 2022 2023 - 2026 2027 - 2036 Thereafter Total (in millions) Commercial loans: Real estate, including construction $ 4,843 $ 3,183 $ 202 $ 6 $ 8,234 Business and corporate banking 8,211 5,395 342 10 13,958 Global banking 6,535 4,294 272 8 11,109 Other commercial 3,821 2,511 159 4 6,495 Consumer loans: Residential mortgages 223 57 667 14,522 15,469 Home equity mortgages (1) 118 157 33 17 325 Credit cards (2) — 204 — — 204 Other consumer 65 3 2 — 70 Total $ 23,816 $ 15,804 $ 1,677 $ 14,567 $ 55,864 (1) Home equity mortgage maturities reflect estimates based on historical payment patterns. (2) As credit card receivables do not have stated maturities, the table reflects an average estimate based on historical payment patterns.
Contractual Maturities of Loans Outstanding by Repricing Characteristic	The following table summarizes loans outstanding at December 31, 2021 due after one year by repricing characteristic: December 31, 2021 Receivables at Predetermined Interest Rates Receivables at Floating or Adjustable Rates Total Loans Due After One Year (in millions) Commercial loans: Real estate, including construction $ 240 $ 3,151 $ 3,391 Business and corporate banking 407 5,340 5,747 Global banking 324 4,250 4,574 Other commercial 189 2,485 2,674 Consumer loans: Residential mortgages 5,181 10,065 15,246 Home equity mortgages 23 184 207 Credit cards 26 178 204 Other consumer — 5 5 Total $ 6,390 $ 25,658 $ 32,048
Summary of Nonaccrual Loans and Accruing Receivables 90 Days or More Delinquent	Nonperforming loans, including nonaccrual loans and accruing loans contractually 90 days or more past due, consisted of the following: Nonaccrual Loans Accruing Loans Contractually Past Due 90 Days or More Nonaccrual Loans With No Allowance For Credit Losses (in millions) At December 31, 2021 Commercial: Real estate, including construction $ 140 $ — $ 20 Business and corporate banking 134 1 69 Global banking 105 — 63 Total commercial 379 1 152 Consumer: Residential mortgages (1)(2)(3) 229 — 55 Home equity mortgages (1)(2) 9 — 4 Credit cards — 2 — Other consumer — — — Total consumer (4) 238 2 59 Total nonperforming loans $ 617 $ 3 $ 211 At December 31, 2020 Commercial: Real estate, including construction $ 44 $ — $ 31 Business and corporate banking 163 — 1 Global banking 337 — 93 Total commercial 544 — 125 Consumer: Residential mortgages (1)(2)(3) 1,079 — 241 Home equity mortgages (1)(2) 63 — 34 Credit cards — 19 — Other consumer — 2 — Total consumer 1,142 21 275 Total nonperforming loans $ 1,686 $ 21 $ 400 (1) At December 31, 2021 and 2020, nonaccrual consumer mortgage loans include $86 million and $375 million, respectively, of loans that are carried at the lower of amortized cost or fair value of the collateral less cost to sell. (2) Nonaccrual consumer mortgage loans include all loans which are 90 or more days contractually delinquent as well as loans discharged under Chapter 7 bankruptcy and not re-affirmed and second lien loans where the first lien loan that we own or service is 90 or more days contractually delinquent. At December 31, 2021 and 2020, nonaccrual consumer mortgage loans also included $12 million and $590 million, respectively, of loans under COVID-19 related payment deferral programs where the borrowers utilized a payment deferral of more than six months and, as a result, have been placed on nonaccrual status. (3) Nonaccrual consumer mortgage loans for all periods does not include guaranteed loans purchased from the Government National Mortgage Association. Repayment of these loans is predominantly insured by the Federal Housing Administration and as such, these loans have different risk characteristics from the rest of our consumer loan portfolio. (4) The decrease in consumer nonperforming loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $698 million of nonperforming consumer loans at the time of transfer, of which $21 million were accruing loans contractually 90 days or more past due. See Note 9, "Loans Held for Sale," for additional information.
Summary of TDR Loans	The following table summarizes our TDR Loans at December 31, 2021 and 2020: At December 31, 2021 2020 (in millions) Commercial loans: Business and corporate banking $ 38 $ 94 Global banking 25 74 Total commercial (1)(2) 63 168 Consumer loans: Residential mortgages (3)(4) 125 582 Home equity mortgages (3)(4) 9 31 Credit cards 3 5 Total consumer (5) 137 618 Total TDR Loans (6) $ 200 $ 786 (1) Additional commitments to lend to commercial borrowers whose loans have been modified in TDR Loans totaled $13 million and $107 million at December 31, 2021 and 2020, respectively. (2) Not included in the table at December 31, 2021 and 2020 are $42 million and $924 million, respectively, of commercial loans that were exempted from TDR assessment due to our CARES Act election. (3) At December 31, 2021 and 2020, the carrying value of consumer mortgage TDR Loans includes $104 million and $487 million, respectively, of loans that are recorded at the lower of amortized cost or fair value of the collateral less cost to sell. (4) Not included in the table at December 31, 2021 and 2020 are $16 million and $736 million, respectively, of consumer mortgage loans under COVID-19 related payment deferral programs where the borrowers were provided with extended payment deferral relief of more than six months that were exempted from TDR assessment due to our CARES Act election. (5) The decrease in consumer TDR Loans at December 31, 2021 includes the impact of transfers of certain loans to held for sale during 2021, which collectively included $416 million of consumer TDR Loans at the time of transfer. See Note 9, "Loans Held for Sale," for additional information. (6) At December 31, 2021 and 2020, the carrying value of TDR Loans includes $115 million and $463 million, respectively, of loans which are classified as nonaccrual.
Summary of Receivables which were Modified and as a Result became Classified as TDR Loans	The following table presents information about loans which were modified during 2021, 2020 and 2019 and as a result of this action became classified as TDR Loans: Year Ended December 31, 2021 2020 2019 (in millions) Commercial loans: Business and corporate banking $ 11 $ 95 $ — Global banking 15 44 — Total commercial 26 139 — Consumer loans: Residential mortgages 36 78 8 Home equity mortgages 1 3 1 Credit cards 2 4 3 Total consumer 39 85 12 Total $ 65 $ 224 $ 12
Loans Classified as TDR Loans in Previous 12 Months that became 60 Days or Greater Delinquent	The following table presents consumer loans which were classified as TDR Loans during the previous 12 months which subsequently became 60 days or greater contractually delinquent during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in millions) Consumer loans: Residential mortgages $ 5 $ 5 $ 3 Total consumer $ 5 $ 5 $ 3
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Summary of Criticized Commercial Loans	The following table summarizes our criticized commercial loans, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Special mention $ — $ — $ 350 $ 487 $ 90 $ 259 $ — $ — $ 1,186 Substandard — 1 272 263 308 461 20 11 1,336 Doubtful — — 80 2 — 53 — — 135 Total real estate, including construction — 1 702 752 398 773 20 11 2,657 Business and corporate banking: Special mention — 1 91 60 26 274 173 — 625 Substandard — 18 36 9 3 226 424 8 724 Doubtful — — — 20 — 28 16 — 64 Total business and corporate banking — 19 127 89 29 528 613 8 1,413 Global banking: Special mention 8 — — — — 8 47 — 63 Substandard — — — — — 54 232 — 286 Doubtful — — — — — — 31 — 31 Total global banking 8 — — — — 62 310 — 380 Other commercial: Special mention — — — — — 7 — — 7 Substandard — — — — — — 40 — 40 Doubtful — — — — — — — — — Total other commercial — — — — — 7 40 — 47 Total commercial: Special mention 8 1 441 547 116 548 220 — 1,881 Substandard — 19 308 272 311 741 716 19 2,386 Doubtful — — 80 22 — 81 47 — 230 Total commercial $ 8 $ 20 $ 829 $ 841 $ 427 $ 1,370 $ 983 $ 19 $ 4,497 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Special mention $ — $ 306 $ 115 $ 171 $ 85 $ 437 $ — $ — $ 1,114 Substandard — 186 — 169 — 86 — — 441 Doubtful — — — — — — — — — Total real estate, including construction — 492 115 340 85 523 — — 1,555 Business and corporate banking: Special mention 17 71 43 32 10 390 600 48 1,211 Substandard 1 44 25 23 31 181 435 1 741 Doubtful — — — — — 41 57 — 98 Total business and corporate banking 18 115 68 55 41 612 1,092 49 2,050 Global banking: Special mention — — — — — 142 98 — 240 Substandard — — 48 — — 131 477 — 656 Doubtful — — — — — 82 160 — 242 Total global banking — — 48 — — 355 735 — 1,138 Other commercial: Special mention — — — — — 44 40 — 84 Substandard — — — — — 70 — — 70 Doubtful — — — — — — — — — Total other commercial — — — — — 114 40 — 154 Total commercial: Special mention 17 377 158 203 95 1,013 738 48 2,649 Substandard 1 230 73 192 31 468 912 1 1,908 Doubtful — — — — — 123 217 — 340 Total commercial $ 18 $ 607 $ 231 $ 395 $ 126 $ 1,604 $ 1,867 $ 49 $ 4,897
Summary of Nonperforming Status	The following table summarizes the nonperforming status of our commercial loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Performing loans $ 969 $ 651 $ 2,436 $ 2,076 $ 593 $ 1,307 $ 46 $ 16 $ 8,094 Nonaccrual loans — 2 80 40 — 18 — — 140 Total real estate, including construction 969 653 2,516 2,116 593 1,325 46 16 8,234 Business and corporate banking: Performing loans 1,630 709 594 190 187 4,756 5,540 217 13,823 Nonaccrual loans — 4 14 30 51 1 34 — 134 Accruing loans contractually past due 90 days or more — — — — — — 1 — 1 Total business and corporate banking 1,630 713 608 220 238 4,757 5,575 217 13,958 Global banking: Performing loans 547 540 203 80 243 4,580 4,811 — 11,004 Nonaccrual loans — — — — — 40 65 — 105 Total global banking 547 540 203 80 243 4,620 4,876 — 11,109 Other commercial: Performing loans 589 552 451 174 110 1,045 3,574 — 6,495 Total other commercial 589 552 451 174 110 1,045 3,574 — 6,495 Total commercial: Performing loans 3,735 2,452 3,684 2,520 1,133 11,688 13,971 233 39,416 Nonaccrual loans — 6 94 70 51 59 99 — 379 Accruing loans contractually past due 90 days or more — — — — — — 1 — 1 Total commercial $ 3,735 $ 2,458 $ 3,778 $ 2,590 $ 1,184 $ 11,747 $ 14,071 $ 233 $ 39,796 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Performing loans $ 545 $ 3,775 $ 2,775 $ 1,368 $ 264 $ 1,594 $ 79 $ 20 $ 10,420 Nonaccrual loans — — 24 — — 20 — — 44 Total real estate, including construction 545 3,775 2,799 1,368 264 1,614 79 20 10,464 Business and corporate banking: Performing loans 1,079 606 253 275 151 3,485 7,145 322 13,316 Nonaccrual loans 1 15 12 60 1 3 71 — 163 Total business and corporate banking 1,080 621 265 335 152 3,488 7,216 322 13,479 Global banking: Performing loans 507 495 190 231 104 6,023 5,632 — 13,182 Nonaccrual loans — — — — — 127 210 — 337 Total global banking 507 495 190 231 104 6,150 5,842 — 13,519 Other commercial: Performing loans 378 431 215 105 119 630 2,259 — 4,137 Total other commercial 378 431 215 105 119 630 2,259 — 4,137 Total commercial: Performing loans 2,509 5,307 3,433 1,979 638 11,732 15,115 342 41,055 Nonaccrual loans 1 15 36 60 1 150 281 — 544 Total commercial $ 2,510 $ 5,322 $ 3,469 $ 2,039 $ 639 $ 11,882 $ 15,396 $ 342 $ 41,599
Summary of Credit Quality Indicators	The following table summarizes the credit risk profile of our commercial loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2021 (in millions) Real estate, including construction: Investment grade $ 1 $ 361 $ 491 $ 772 $ 57 $ 248 $ 12 $ — $ 1,942 Non-investment grade 968 292 2,025 1,344 536 1,077 34 16 6,292 Total real estate, including construction 969 653 2,516 2,116 593 1,325 46 16 8,234 Business and corporate banking: Investment grade 881 254 240 52 43 2,122 2,498 55 6,145 Non-investment grade 749 459 368 168 195 2,635 3,077 162 7,813 Total business and corporate banking 1,630 713 608 220 238 4,757 5,575 217 13,958 Global banking: Investment grade 530 539 189 64 235 3,910 4,240 — 9,707 Non-investment grade 17 1 14 16 8 710 636 — 1,402 Total global banking 547 540 203 80 243 4,620 4,876 — 11,109 Other commercial: Investment grade 120 442 153 174 69 943 3,527 — 5,428 Non-investment grade 469 110 298 — 41 102 47 — 1,067 Total other commercial 589 552 451 174 110 1,045 3,574 — 6,495 Total commercial: Investment grade 1,532 1,596 1,073 1,062 404 7,223 10,277 55 23,222 Non-investment grade 2,203 862 2,705 1,528 780 4,524 3,794 178 16,574 Total commercial $ 3,735 $ 2,458 $ 3,778 $ 2,590 $ 1,184 $ 11,747 $ 14,071 $ 233 $ 39,796 2020 2019 2018 2017 2016 Prior Revolving Revolving Loans Converted to Term Loans Total at Dec. 31, 2020 (in millions) Real estate, including construction: Investment grade $ 339 $ 1,123 $ 817 $ 318 $ 179 $ 640 $ 6 $ — $ 3,422 Non-investment grade 206 2,652 1,982 1,050 85 974 73 20 7,042 Total real estate, including construction 545 3,775 2,799 1,368 264 1,614 79 20 10,464 Business and corporate banking: Investment grade 342 147 37 34 23 1,486 2,499 47 4,615 Non-investment grade 738 474 228 301 129 2,002 4,717 275 8,864 Total business and corporate banking 1,080 621 265 335 152 3,488 7,216 322 13,479 Global banking: Investment grade 464 477 46 231 30 4,618 4,281 — 10,147 Non-investment grade 43 18 144 — 74 1,532 1,561 — 3,372 Total global banking 507 495 190 231 104 6,150 5,842 — 13,519 Other commercial: Investment grade 372 163 117 105 116 525 1,932 — 3,330 Non-investment grade 6 268 98 — 3 105 327 — 807 Total other commercial 378 431 215 105 119 630 2,259 — 4,137 Total commercial: Investment grade 1,517 1,910 1,017 688 348 7,269 8,718 47 21,514 Non-investment grade 993 3,412 2,452 1,351 291 4,613 6,678 295 20,085 Total commercial $ 2,510 $ 5,322 $ 3,469 $ 2,039 $ 639 $ 11,882 $ 15,396 $ 342 $ 41,599
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Summary of TDR Loans	The following table summarizes TDR Loans in our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages $ — $ 1 $ 3 $ 3 $ — $ 118 $ — $ 125 Home equity mortgages — — — — — 9 — 9 Credit cards — — — — — — 3 3 Total consumer $ — $ 1 $ 3 $ 3 $ — $ 127 $ 3 $ 137 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages $ 3 $ 5 $ 6 $ 3 $ 2 $ 563 $ — $ 582 Home equity mortgages — — — — — 31 — 31 Credit cards — — — — — — 5 5 Total consumer $ 3 $ 5 $ 6 $ 3 $ 2 $ 594 $ 5 $ 618
Summary of Nonperforming Status	The following table summarizes the nonperforming status of our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages: Performing loans $ 4,496 $ 3,296 $ 1,481 $ 851 $ 955 $ 4,161 $ — $ 15,240 Nonaccrual loans 2 9 15 21 14 168 — 229 Total residential mortgages 4,498 3,305 1,496 872 969 4,329 — 15,469 Home equity mortgages: Performing loans 15 30 30 18 17 206 — 316 Nonaccrual loans — — — — — 9 — 9 Total home equity mortgages 15 30 30 18 17 215 — 325 Credit cards: Performing loans — — — — — — 202 202 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total credit cards — — — — — — 204 204 Other consumer: Performing loans 8 8 5 1 1 45 2 70 Total other consumer 8 8 5 1 1 45 2 70 Total consumer: Performing loans 4,519 3,334 1,516 870 973 4,412 204 15,828 Nonaccrual loans 2 9 15 21 14 177 — 238 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total consumer $ 4,521 $ 3,343 $ 1,531 $ 891 $ 987 $ 4,589 $ 206 $ 16,068 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages: Performing loans $ 4,491 $ 2,369 $ 1,338 $ 1,572 $ 1,852 $ 5,676 $ — $ 17,298 Nonaccrual loans 38 107 93 86 78 677 — 1,079 Total residential mortgages 4,529 2,476 1,431 1,658 1,930 6,353 — 18,377 Home equity mortgages: Performing loans 50 51 33 34 45 451 — 664 Nonaccrual loans — — 1 1 2 59 — 63 Total home equity mortgages 50 51 34 35 47 510 — 727 Credit cards: Performing loans — — — — — — 1,047 1,047 Accruing loans contractually past due 90 days or more — — — — — — 19 19 Total credit cards — — — — — — 1,066 1,066 Other consumer: Performing loans 87 39 — 1 8 128 54 317 Accruing loans contractually past due 90 days or more — — — — — — 2 2 Total other consumer 87 39 — 1 8 128 56 319 Total consumer: Performing loans 4,628 2,459 1,371 1,607 1,905 6,255 1,101 19,326 Nonaccrual loans 38 107 94 87 80 736 — 1,142 Accruing loans contractually past due 90 days or more — — — — — — 21 21 Total consumer $ 4,666 $ 2,566 $ 1,465 $ 1,694 $ 1,985 $ 6,991 $ 1,122 $ 20,489
Summary of Credit Quality Indicators	The following table summarizes dollars of two-months-and-over contractual delinquency for our consumer loan portfolio, including a disaggregation of the loans by year of origination as of December 31, 2021 and 2020: 2021 2020 2019 2018 2017 Prior Revolving Total at Dec. 31, 2021 (in millions) Residential mortgages (1)(2) $ 5 $ 2 $ 11 $ 13 $ 8 $ 64 $ — $ 103 Home equity mortgages (1)(2) — — — — — 1 — 1 Credit cards — — — — — — 3 3 Other consumer — — — — — — — — Total consumer $ 5 $ 2 $ 11 $ 13 $ 8 $ 65 $ 3 $ 107 2020 2019 2018 2017 2016 Prior Revolving Total at Dec. 31, 2020 (in millions) Residential mortgages (1)(2) $ 3 $ 15 $ 13 $ 25 $ 19 $ 329 $ — $ 404 Home equity mortgages (1)(2) — — — — — 25 — 25 Credit cards — — — — — — 28 28 Other consumer 1 1 — — — 4 2 8 Total consumer $ 4 $ 16 $ 13 $ 25 $ 19 $ 358 $ 30 $ 465 (1) At December 31, 2021 and 2020, consumer mortgage loan delinquency includes $24 million and $281 million, respectively, of loans that are carried at the lower of amortized cost or fair value of the collateral less cost to sell. (2) At December 31, 2021 and 2020, consumer mortgage loans include $87 million and $109 million, respectively, of loans that were in the process of foreclosure.

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2021
Credit Loss [Abstract]
Forecasted Key Macroeconomic Variables Used in Estimating Lifetime ECL	The following table presents the forecasted key macroeconomic variables in our Central scenarios used for estimating lifetime ECL at December 31, 2021 and December 31, 2020: For the Quarter Ended June 30, 2022 December 31, 2022 Unemployment rate (quarterly average): Forecast at December 31, 2021 4.3 % 4.0 % Forecast at December 31, 2020 5.9 5.4 GDP growth rate (year-over-year): Forecast at December 31, 2021 4.1 2.8 Forecast at December 31, 2020 3.1 1.8
Summary of Allowance for Credit Losses and Liability for Off-balance Sheet Credit Exposures	The following table summarizes our allowance for credit losses and the liability for off-balance sheet credit exposures: At December 31, 2021 2020 (in millions) Allowance for credit losses: Loans $ 447 $ 1,015 Securities held-to-maturity (1) 1 2 Other financial assets measured at amortized cost (2) 1 2 Securities available-for-sale (1) 1 1 Total allowance for credit losses $ 450 $ 1,020 Liability for off-balance sheet credit exposures $ 103 $ 237 (1) See Note 6, "Securities," for additional information regarding the allowance for credit losses associated with our security portfolios. (2) Primarily includes accrued interest receivables and customer acceptances.
Summary of Changes in the Allowance for Credit Losses by Product Line	The following table summarizes the changes in the allowance for credit losses on loans by product or line of business during the years ended December 31, 2021, 2020 and 2019: Commercial Loans Consumer Loans Real Estate, including Construction Business Global Other Residential Home Credit Other Total Loans (in millions) Year Ended December 31, 2021 Allowance for credit losses – beginning of period $ 145 $ 375 $ 287 $ 7 $ (9) $ 22 $ 161 $ 27 $ 1,015 Provision charged (credited) to income (1) (72) (107) (174) (3) 21 (18) (66) (18) (437) Charge-offs (1) — (29) (13) — (19) (5) (89) (10) (165) Recoveries — 4 — — 15 6 8 1 34 Net (charge-offs) recoveries — (25) (13) — (4) 1 (81) (9) (131) Allowance for credit losses – end of period $ 73 $ 243 $ 100 $ 4 $ 8 $ 5 $ 14 $ — $ 447 Year Ended December 31, 2020 Allowance for credit losses – beginning of period $ 153 $ 239 $ 106 $ 9 $ 12 $ 6 $ 105 $ 7 $ 637 Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses (2) (112) (60) 51 (5) (86) 7 32 3 (170) Allowance for credit losses – beginning of period, adjusted 41 179 157 4 (74) 13 137 10 467 Provision charged (credited) to income 116 274 149 2 55 6 107 27 736 Charge-offs (12) (90) (20) — (2) (3) (90) (11) (228) Recoveries — 12 1 1 12 6 7 1 40 Net (charge-offs) recoveries (12) (78) (19) 1 10 3 (83) (10) (188) Allowance for credit losses – end of period $ 145 $ 375 $ 287 $ 7 $ (9) $ 22 $ 161 $ 27 $ 1,015 Year Ended December 31, 2019 Allowance for credit losses – beginning of period $ 116 $ 219 $ 108 $ 15 $ 13 $ 7 $ 58 $ 5 $ 541 Provision charged (credited) to income 37 62 1 (6) (3) (2) 101 5 195 Charge-offs — (45) (3) — (8) (4) (60) (5) (125) Recoveries — 3 — — 10 5 6 2 26 Net (charge-offs) recoveries — (42) (3) — 2 1 (54) (3) $ (99) Allowance for credit losses – end of period $ 153 $ 239 $ 106 $ 9 $ 12 $ 6 $ 105 $ 7 $ 637 (1) For loans that are transferred to held for sale, the existing allowance for credit losses at the time of transfer is recognized as a charge-off to the extent fair value is less than amortized cost and attributable to credit. Any remaining allowance for credit losses is released to the provision for credit losses. During the second quarter of 2021, we made the decision to exit our mass market retail banking business as well as our remaining retail credit card portfolio which resulted in the transfer of certain loans to held for sale. As a result of transferring these loans to held for sale, we recognized $56 million of the existing allowance for credit losses on consumer loans as charge-offs, primarily related to non-performing credit cards, and released $100 million of the existing allowance for credit losses on consumer loans as reductions to the provision for credit losses, primarily related to credit cards. The existing commercial allowance for credit losses on the retail business banking loan portfolio transferred to held for sale was not material. See Note 4, "Branch Assets and Liabilities Held for Sale." During the fourth quarter of 2021, a portfolio of Premier credit cards was transferred back to held for investment which resulted in increases to the allowance for credit losses and provision for credit losses of $14 million. During the third quarter of 2021, we transferred certain commercial real estate loans to held for sale and, as a result, we released $24 million of the existing allowance for credit losses as a reduction to the provision for credit losses. During the fourth quarter of 2021, we also transferred certain non-performing mortgage loans and government-backed mortgage loans to held for sale. As a result, we recognized $4 million of the existing allowance for credit losses as charge-offs and released $22 million of the existing allowance for expected recoveries on these loans as an increase to the provision for credit losses. (2) Reflects the adoption of new accounting guidance in 2020 as discussed above. In addition, see Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion.
Summary of Changes in the Liability for Off-balance Sheet Credit Exposures	The following table summarizes the changes in the liability for off-balance sheet credit exposures during the years ended December 31, 2021, 2020 and 2019: Year Ended December 31, 2021 2020 2019 (in millions) Balance at beginning of period $ 237 $ 104 $ 96 Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses (1) — 54 — Balance at beginning of period, adjusted 237 158 96 Provision charged (credited) to income (134) 79 8 Balance at end of period $ 103 $ 237 $ 104 (1) Reflects the adoption of new accounting guidance in 2020 as discussed above. In addition, see Note 2, "Summary of Significant Accounting Policies and New Accounting Pronouncements," for further discussion.
Summary of Accrued Interest Receivables	The following table summarizes accrued interest receivables associated with financial assets carried at amortized cost and securities available-for-sale along with the related allowance for credit losses, which are reported net in other assets on the consolidated balance sheet. These accrued interest receivables are excluded from the amortized cost basis disclosures presented elsewhere in these financial statements, including Note 6, "Securities," and Note 7, "Loans." At December 31, 2021 2020 (in millions) Accrued interest receivables: Loans $ 109 $ 140 Securities held-to-maturity 13 23 Other financial assets measured at amortized cost 1 1 Securities available-for-sale 82 100 Total accrued interest receivables 205 264 Allowance for credit losses 1 2 Accrued interest receivables, net $ 204 $ 262

Loans Held for Sale (Tables)

Loans Held for Sale (Tables)	12 Months Ended
	Dec. 31, 2021
Receivables [Abstract]
Loans Held for Sale	Loans held for sale consisted of the following: At December 31, 2021 2020 (in millions) Commercial loans: Real estate, including construction $ — $ 10 Business and corporate banking 123 — Global banking 338 119 Total commercial 461 129 Consumer loans: Residential mortgages 3,082 208 Home equity mortgages 275 — Credit cards 195 — Other consumer 204 — Total consumer 3,756 208 Total loans held for sale $ 4,217 $ 337

Properties and Equipment, Net (

Properties and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Properties and Equipment, Net	Properties and equipment, net is summarized in the following table: At December 31, 2021 2020 (in millions) Land $ 2 $ 5 Buildings and improvements (1) 291 543 Furniture and equipment (1) 67 129 Total 360 677 Accumulated depreciation and amortization (1) (320) (533) Properties and equipment, net $ 40 $ 144 (1) The decreases since December 31, 2020 are due primarily to the impact of our decision to exit our mass market retail banking business which resulted in the transfer of assets to other branch related assets held for sale during the second quarter of 2021 as well as the retirement of assets associated with certain branches and office space which we exited in 2021 as part of our Restructuring Plan. See Note 3, "Strategic Initiatives," and Note 4, "Branch Assets and Liabilities Held for Sale," for further discussion. During 2020, we also recognized $18 million of gains on sales of certain owned retail branch properties. These gains are reflected in other income (loss) in the consolidated statement of income (loss) and were reported in the Corporate Center business segment.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Operating Lease Costs and Supplemental Cash Flow Information	The following table summarizes the components of total operating lease costs, net and provides supplemental cash flow information related to leases: Year Ended December 31, 2021 2020 2019 (in millions) Operating lease cost $ 87 $ 127 $ 136 Variable lease cost 48 59 63 Short-term lease cost — — 4 Sublease income (1) (43) (54) (60) Total operating lease costs, net $ 92 $ 132 $ 143 Supplemental disclosure of cash flow information: Cash paid for amounts included in the measurement of operating lease liabilities $ 129 $ 135 $ 126 ROU assets recognized for new operating lease liabilities — 24 132 (1) We have entered into agreements to sublease certain office space, including agreements to receive rental income from our affiliates. As owner or lessee of the properties, we have entered into agreements with these affiliates to charge them rent based on the office space utilized by their employees during the period. See Note 24, "Related Party Transactions," for further disclosure.
Operating Lease ROU Assets and Liabilities	The following table presents information about our operating lease ROU assets and liabilities: At December 31, 2021 2020 (dollars are in millions) Operating lease ROU assets (1)(2) $ 181 $ 527 Operating lease liabilities (2) 305 625 Weighted-average remaining lease term 6.7 years 6.8 years Weighted-average discount rate 3.0 % 3.0 % (1) Reported net of level lease adjustments and accumulated impairment losses. (2) The decreases since December 31, 2020 include the impact of our decision to exit our mass market retail banking business which resulted in the transfer of lease ROU assets and lease liabilities to other branch related assets held for sale and other branch related liabilities held for sale during the second quarter of 2021. See Note 4, "Branch Assets and Liabilities Held for Sale," for further discussion.
Maturity Analysis of Operating Lease Liabilities	The following table presents a maturity analysis of our operating lease liabilities at December 31, 2021: Year Ending December 31, (in millions) 2022 $ 79 2023 78 2024 70 2025 35 2026 15 Thereafter 65 Total future operating lease payments 342 Less - imputed interest (37) Total operating lease liabilities $ 305

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2021
Deposits [Abstract]
Schedule of Time Deposits of $250,000 or More	The following table presents the aggregate amount of time deposit accounts in denominations exceeding $250,000 at December 31, 2021 and 2020: At December 31, 2021 2020 (in millions) Domestic deposits $ 6,140 $ 14,270 Foreign deposits 265 232 Total $ 6,405 $ 14,502
Schedule of Maturities of Time Deposits	The scheduled maturities of all time deposits at December 31, 2021 are summarized in the following table: Domestic Deposits Foreign Deposits Total (in millions) 2022 $ 5,721 $ 265 $ 5,986 2023 541 — 541 2024 391 — 391 2025 315 — 315 2026 1,719 — 1,719 Thereafter 558 — 558 $ 9,245 $ 265 $ 9,510

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2021
Short-term Debt [Abstract]
Schedule of short-term borrowings	Short-term borrowings consisted of the following: December 31, 2021 Rate 2020 Rate (dollars are in millions) Securities sold under repurchase agreements $ 2,315 .05 % $ 1,765 .22 % Commercial paper 3,683 .36 2,998 .52 Other 340 189 Total short-term borrowings $ 6,338 $ 4,952 During 2019, we recorded a loss of $14 million on extinguishment of certain repurchase agreements.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2021
Long-term Debt, Unclassified [Abstract]
Schedule of long-term debt instruments	Interest rates and maturity dates in effect at December 31, 2021 are shown in the below table. At December 31, Maturity Date Interest Rate Interest Rate 2021 2020 (in millions) Issued or acquired by HSBC USA: Senior debt: Fixed-rate notes 2024 - 2030 1.12% - 4.20% 2.63% $ 6,347 $ 2,990 Structured notes 2022 - 2045 .13 - 2.51 .62 6,346 7,938 Total senior debt 12,693 10,928 Subordinated debt: Fixed-rate notes 2097 7.20 7.20 222 422 Floating-rate notes (1) — 850 Total subordinated debt 222 1,272 Mark-to-market adjustment on fair value option debt 1,145 1,344 Total issued or acquired by HSBC USA 14,060 13,544 Issued or acquired by HSBC Bank USA and its subsidiaries: Senior debt: Floating-rate notes 2024 - 2040 .02 - .91 .31 25 42 Structured notes 2022 - 2028 (.08) - 3.04 1.22 488 394 FHLB advances - fixed-rate — 3,250 FHLB advances - floating-rate 2036 .23 .23 1,000 1,000 Total senior debt 1,513 4,686 Subordinated fixed-rate notes 2034 - 2039 5.63 - 7.00 6.36 1,441 1,441 Mark-to-market adjustment on fair value option debt 222 308 Total issued or acquired by HSBC Bank USA and its subsidiaries 3,176 6,435 Total long-term debt $ 17,236 $ 19,979 (1) During 2021, $850 million of floating-rate subordinated debt with HSBC North America was called and repaid.
Maturities of long-term debt	Maturities of long-term debt at December 31, 2021 were as follows: (in millions) 2022 $ 2,930 2023 1,593 2024 2,014 2025 4,474 2026 631 Thereafter 5,594 Total $ 17,236

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table presents the fair value of derivative contracts by major product type on a gross basis. Gross fair values exclude the effects of both counterparty netting as well as collateral, and therefore are not representative of our exposure. The table below also presents the amounts of counterparty netting and cash collateral that have been offset in the consolidated balance sheet, as well as cash and securities collateral posted and received under enforceable master netting agreements that do not meet the criteria for netting. Derivative assets and liabilities which are not subject to an enforceable master netting agreement, or are subject to a netting agreement where an appropriate legal opinion to determine such agreements are enforceable has not been either sought or obtained, have not been netted in the following table. Where we have received or posted collateral under netting agreements where an appropriate legal opinion to determine such agreements are enforceable has not been either sought or obtained, the related collateral also has not been netted in the following table. December 31, 2021 December 31, 2020 Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities (in millions) Derivatives accounted for as fair value hedges (1) Interest rate contracts - bilateral OTC (2) $ — $ 5 $ — $ 2 Derivatives accounted for as cash flow hedges (1) Foreign exchange contracts - bilateral OTC (2) 29 — — 53 Interest rate contracts - bilateral OTC (2) — 2 — — Total derivatives accounted for as hedges 29 7 — 55 Trading derivatives not accounted for as hedges (3) Exchange-traded (2) 8 10 14 9 OTC-cleared (2) 37 — — 58 Bilateral OTC (2) 1,756 1,877 6,584 6,555 Interest rate contracts (4) 1,801 1,887 6,598 6,622 OTC-cleared (2) — — 168 — Bilateral OTC (2) 11,321 11,125 18,299 18,549 Foreign exchange contracts 11,321 11,125 18,467 18,549 Equity contracts - bilateral OTC (2) 588 1,240 4,009 4,200 Exchange-traded (2) 4 — — 28 Bilateral OTC (2) 936 779 1,323 1,550 Precious metals contracts 940 779 1,323 1,578 Credit contracts - bilateral OTC (2) 28 25 367 233 Other non-qualifying derivatives not accounted for as hedges (1) Interest rate contracts - bilateral OTC (2) 47 5 89 1 Foreign exchange contracts - bilateral OTC (2) — 1 — 1 Equity contracts - bilateral OTC (2) 1,470 121 1,607 91 OTC-cleared (2) — 19 — 14 Bilateral OTC (2) — 38 — 50 Credit contracts — 57 — 64 Other contracts - bilateral OTC (2)(5) 5 38 8 67 Total derivatives 16,229 15,285 32,468 31,461 Less: Gross amounts of receivable / payable subject to enforceable master netting agreements (6)(8) 11,991 11,991 25,537 25,537 Less: Gross amounts of cash collateral received / posted subject to enforceable master netting agreements (7)(8) 2,797 1,296 4,079 3,377 Net amounts of derivative assets / liabilities presented in the balance sheet 1,441 1,998 2,852 2,547 Less: Gross amounts of financial instrument collateral received / posted subject to enforceable master netting agreements but not offset in the consolidated balance sheet 179 194 817 691 Net amounts of derivative assets / liabilities $ 1,262 $ 1,804 $ 2,035 $ 1,856 (1) Derivative assets / liabilities related to cash flow hedges, fair value hedges and derivative instruments held for purposes other than for trading are recorded in other assets / interest, taxes and other liabilities on the consolidated balance sheet. (2) Over-the-counter ("OTC") derivatives include derivatives executed and settled bilaterally with counterparties without the use of an organized exchange or central clearing house. The credit risk associated with bilateral OTC derivatives is managed through obtaining collateral and enforceable master netting agreements. OTC-cleared derivatives are executed bilaterally in the OTC market but then novated to a central clearing counterparty, whereby the central clearing counterparty becomes the counterparty to each of the original counterparties. Exchange traded derivatives are executed directly on an organized exchange. Credit risk is minimized for OTC-cleared derivatives and exchange traded derivatives through daily margining requirements. In addition, OTC-cleared interest rate and credit derivatives with certain central clearing counterparties are settled daily. (3) Trading related derivative assets / liabilities are recorded in trading assets / trading liabilities on the consolidated balance sheet. (4) The decreases in interest rate derivative assets and liabilities at December 31, 2021 primarily reflects reduced positions driven by the exit or transfer of certain contracts as part of our Restructuring Plan. See Note 3, "Strategic Initiatives," for additional information. (5) Consists of swap agreements entered into in conjunction with the sales of Visa Inc. ("Visa") Class B common shares ("Class B Shares"). (6) Represents the netting of derivative receivable and payable balances for the same counterparty under enforceable netting agreements. (7) Represents the netting of cash collateral posted and received by counterparty under enforceable netting agreements. (8) Netting is performed at a counterparty level in cases where enforceable master netting agreements are in place, regardless of the type of derivative instrument. Therefore, we have not allocated netting to the different types of derivative instruments shown in the table above.
Schedule of Gains and Losses on Fair Value Hedging Instruments	The following table presents the carrying amount of hedged items in fair value hedges recognized in the consolidated balance sheet at December 31, 2021 and 2020, along with the cumulative amount of fair value hedging adjustments included in the carrying amount of those hedged items: Carrying Amount of Hedged Items (1) Cumulative Amount of Fair Value Hedging Adjustments Increasing (Decreasing) the Active Discontinued Total (in millions) At December 31, 2021 Securities available-for-sale ("AFS") $ 7,919 $ (72) $ 1,010 $ 938 Deposits 1,598 (27) 125 98 Long-term debt 5,587 (61) 148 87 At December 31, 2020 Securities AFS 7,966 681 738 1,419 Deposits 5,214 214 — 214 Long-term debt 2,227 242 (15) 227 (1) The carrying amount of securities AFS represents the amortized cost basis. The following table presents information on gains and losses on derivative instruments designated and qualifying as hedging instruments and the hedged items in fair value hedges and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) on Derivatives Gain (Loss) on Hedged Items (in millions) Year Ended December 31, 2021 Interest rate contracts / Securities AFS Net interest income $ 129 $ (29) Interest rate contracts / Deposits Net interest income (49) (6) Interest rate contracts / Long-term debt Net interest income (30) (14) Total $ 50 $ (49) Year Ended December 31, 2020 Interest rate contracts / Securities AFS Net interest income $ (731) $ 900 Interest rate contracts / Deposits Net interest income 148 (261) Interest rate contracts / Long-term debt Net interest income 165 (261) Total $ (418) $ 378 Year Ended December 31, 2019 Interest rate contracts / Securities AFS Net interest income $ (776) $ 1,086 Interest rate contracts / Long-term debt Net interest income 235 (703) Total $ (541) $ 383
Schedule of Gains and Losses on Cash Flow Hedging Instruments	The following table presents information on gains and losses on derivative instruments designated and qualifying as hedging instruments in cash flow hedges (including amounts recognized in AOCI from discontinued cash flow hedges) and their locations on the consolidated statement of income (loss): Gain (Loss) Recognized in Location of Gain (Loss) Gain (Loss) Reclassified From 2021 2020 2019 2021 2020 2019 (in millions) Year Ended December 31, Foreign exchange contracts $ (1) $ — $ 3 Net interest income $ — $ — $ — Interest rate contracts (64) 84 (27) Net interest income 13 (11) (35) Total $ (65) $ 84 $ (24) $ 13 $ (11) $ (35)
Schedule of Gains and Losses on Derivative Instruments Included in Trading Activities	The following table presents information on gains and losses on derivative instruments held for trading purposes and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) Recognized in Income on Derivatives Year Ended December 31, 2021 2020 2019 (in millions) Interest rate contracts Trading revenue $ (11) $ 396 $ (89) Foreign exchange contracts Trading revenue 274 (747) 310 Equity contracts Trading revenue (2,432) 57 (496) Precious metals contracts Trading revenue 145 594 312 Credit contracts Trading revenue 83 (556) (445) Total $ (1,941) $ (256) $ (408)
Schedule of Gains and Losses on Derivative Instruments Held for Non-qualifying Hedging Activities	The following table presents information on gains and losses on derivative instruments held for non-qualifying hedging and other activities and their locations on the consolidated statement of income (loss): Location of Gain (Loss) Gain (Loss) Recognized in Income on Derivatives Year Ended December 31, 2021 2020 2019 (in millions) Interest rate contracts Gain (loss) on instruments designated at fair value and related derivatives $ (61) $ 229 $ 364 Interest rate contracts Other income (loss) (2) (6) (1) Foreign exchange contracts Gain (loss) on instruments designated at fair value and related derivatives — (1) (3) Equity contracts Gain (loss) on instruments designated at fair value and related derivatives 1,139 592 1,809 Credit contracts Gain (loss) on instruments designated at fair value and related derivatives — 37 — Credit contracts Other income (loss) (19) (18) (24) Other contracts (1) Other income (loss) (2) (9) (63) Total $ 1,055 $ 824 $ 2,082 (1) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares.
Credit-Risk Related Contingent Features	The following table presents the amount of additional collateral that we would be required to post (from the current collateral level) related to derivative instruments with credit-risk related contingent features if our long-term ratings were downgraded by one or two notches. A downgrade by a single rating agency that does not result in a rating lower than a preexisting corresponding rating provided by another rating agency will generally not result in additional collateral. One-notch downgrade Two-notch downgrade (in millions) Amount of additional collateral to be posted upon downgrade $ 20 $ 68
Notional Value of Derivative Contracts	The following table summarizes the notional values of derivative contracts: At December 31, 2021 2020 (in millions) Interest rate: Futures and forwards $ 44,686 $ 37,098 Swaps 177,876 406,609 Options written 10,842 33,269 Options purchased 12,688 32,427 Total interest rate 246,092 509,403 Foreign exchange: Swaps, futures and forwards 974,725 1,195,449 Options written 28,577 53,200 Options purchased 28,678 53,595 Spot 31,319 57,040 Total foreign exchange 1,063,299 1,359,284 Commodities, equities and precious metals: Swaps, futures and forwards 60,054 54,458 Options written 5,873 17,078 Options purchased 11,800 27,083 Total commodities, equities and precious metals 77,727 98,619 Credit derivatives 7,023 52,611 Other contracts (1) 1,204 1,216 Total $ 1,395,345 $ 2,021,133 (1) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares.

Fair Value Option (Tables)

Fair Value Option (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Summary of Fair Value and Unpaid Principal Balance for Items Accounted for Under FVO	The following table summarizes the fair value and unpaid principal balance for items we account for under FVO: Fair Value Unpaid Principal Balance Fair Value Over (Under) Unpaid Principal Balance (in millions) At December 31, 2021 Student loans held for sale $ 25 $ 28 $ (3) Commercial loans held for sale 23 23 — Fixed rate long-term debt 945 741 204 Hybrid instruments: Structured deposits 2,749 2,465 284 Structured notes 7,997 6,834 1,163 At December 31, 2020 Student loans held for investment $ 32 $ 34 $ (2) Commercial loans held for sale 36 36 — Fixed rate long-term debt 1,030 741 289 Hybrid instruments: Structured deposits 4,155 3,844 311 Structured notes 9,695 8,332 1,363
Components of Gain on Instruments at Fair Value and Related Derivatives	The following table summarizes the components of gain (loss) on instruments designated at fair value and related derivatives reflected in the consolidated statement of income (loss) for the years ended December 31, 2021, 2020 and 2019: Loans and Loans Held for Sale Long-Term Hybrid Total (in millions) Year Ended December 31, 2021 Interest rate and other components (1) $ — $ 74 $ (1,119) $ (1,045) Credit risk component (2) 2 — — 2 Total mark-to-market on financial instruments designated at fair value 2 74 (1,119) (1,043) Mark-to-market on related derivatives — (88) 1,128 1,040 Net realized gain on related long-term debt derivatives — 38 — 38 Gain (loss) on instruments designated at fair value and related derivatives $ 2 $ 24 $ 9 $ 35 Year Ended December 31, 2020 Interest rate and other components (1) $ — $ (79) $ (695) $ (774) Credit risk component (2)(3) (49) — — (49) Total mark-to-market on financial instruments designated at fair value (49) (79) (695) (823) Mark-to-market on related derivatives 37 88 699 824 Net realized gain on related long-term debt derivatives — 33 — 33 Gain (loss) on instruments designated at fair value and related derivatives $ (12) $ 42 $ 4 $ 34 Year Ended December 31, 2019 Interest rate and other components (1) $ — $ (200) $ (1,986) $ (2,186) Credit risk component (2) 3 — — 3 Total mark-to-market on financial instruments designated at fair value 3 (200) (1,986) (2,183) Mark-to-market on related derivatives — 148 1,983 2,131 Net realized gain on related long-term debt derivatives — 39 — 39 Gain (loss) on instruments designated at fair value and related derivatives $ 3 $ (13) $ (3) $ (13) (1) As it relates to hybrid instruments, interest rate and other components primarily includes interest rate, foreign exchange and equity contract risks. (2) The fair value movement on fair value option liabilities attributable to our own credit spread is recorded in other comprehensive income (loss). (3) During 2020, the loss in the credit risk component for loans and loans held for sale was attributable to the widening of credit spreads associated with certain commercial loans held for sale which were impacted by the COVID-19 pandemic.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Components of income tax expense (benefit)	Total income taxes was as follows: Year Ended December 31, 2021 2020 2019 (in millions) Provision (benefit) for income taxes $ 224 $ (42) $ 157 Income tax expense (benefit) included in common equity related to: Unrealized gains (losses) on investment securities (258) 274 128 Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread 4 8 (98) Unrealized gains (losses) on derivatives designated as cash flow hedges (19) 23 3 Employer accounting for post-retirement plans 1 (1) (5) Total income taxes $ (48) $ 262 $ 185 The components of the provision for income taxes were as follows: Year Ended December 31, 2021 2020 2019 (in millions) Current: Federal $ (111) $ (45) $ (3) State and local (7) (9) 35 Foreign 2 (13) 16 Total current (116) (67) 48 Deferred 340 25 109 Provision (benefit) for income taxes $ 224 $ (42) $ 157
Effective Tax Rates	The following table provides an analysis of the difference between effective rates based on the provision (benefit) for income taxes attributable to pretax income (loss) and the statutory U.S. Federal income tax rate: Year Ended December 31, 2021 2020 2019 (dollars are in millions) Tax expense (benefit) at the U.S. Federal statutory income tax rate $ 192 21.0 % $ (206) (21.0) % $ 57 21.0 % Increase (decrease) in rate resulting from: State and local taxes, net of Federal benefit 31 3.4 (2) (.2) 23 8.5 Non-deductible FDIC assessment fees 13 1.4 15 1.5 5 1.9 Non-deductible goodwill impairment (1) — — 165 16.8 77 28.5 Items affecting prior periods (2) — — 3 .3 7 2.6 Uncertain tax positions 6 .7 (8) (.8) 5 1.9 Low income housing and other tax credit investments (15) (1.7) (14) (1.4) (13) (4.8) Other (3) (.2) 5 .5 (4) (1.5) Provision (benefit) for income taxes $ 224 24.6 % $ (42) (4.3) % $ 157 58.1 % (1) For 2020, the amount represents non-deductible goodwill impairment related to our previously separate Retail Banking and Wealth Management and Private Banking businesses. For 2019, the amount represents non-deductible goodwill impairment related to our previously separate Retail Banking and Wealth Management business. (2) For 2020, the amount primarily relates to prior year State audit settlements, partially offset by changes in estimates as a result of filing the 2019 Federal and State income tax returns. For 2019, the amount primarily relates to changes in estimates as a result of filing the 2018 Federal income tax return and a reduction in a State and local capital loss carryback claim, partially offset by prior year State audit adjustments.
Components of net deferred tax position	The components of the net deferred tax asset are presented in the following table: At December 31, 2021 2020 (in millions) Deferred tax assets: Allowance for credit losses $ 150 $ 245 Accrued expenses 64 108 Interests in real estate mortgage investment conduits (1) 127 158 Unrealized losses on investment securities 21 — Capitalized costs (2) 495 501 Lease liabilities 111 152 Other 219 268 Total deferred tax assets 1,187 1,432 Deferred tax liabilities: Lease ROU assets 80 127 Unrealized gains on investment securities — 237 Amortization of intangible assets 21 19 Fair value adjustments 43 1 Other 14 37 Total deferred tax liabilities 158 421 Net deferred tax asset $ 1,029 $ 1,011 (1) Real estate mortgage investment conduits ("REMICs") are investment vehicles that hold commercial and residential mortgages in trust and issue securities representing an undivided interest in these mortgages. HSBC Bank USA holds portfolios of noneconomic residual interests in a number of REMICs. This item represents tax basis in such interests which has accumulated as a result of tax rules requiring the recognition of income related to such noneconomic residuals. (2) Reflects our tax return election to capitalize certain service costs.
Reconciliation of unrecognized tax benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits related to uncertain tax positions is as follows: 2021 2020 2019 (in millions) Balance at January 1, $ 20 $ 30 $ 24 Additions for tax positions of prior years 9 — 7 Reductions for tax positions of prior years (3) (1) (1) Reductions related to settlements with taxing authorities — (9) — Balance at December 31, $ 26 $ 20 $ 30

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income	The following table presents changes in accumulated other comprehensive income (loss) balances: Year Ended December 31, 2021 2020 2019 (in millions) Unrealized gains (losses) on investment securities: Balance at beginning of period $ 750 $ (116) $ (519) Cumulative effect adjustment to initially apply new accounting guidance for measuring credit losses on securities available-for-sale, net of tax of $1 million (1) — 2 — Balance at beginning of period, adjusted 750 (114) (519) Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $(244) million, $298 million and $145 million, respectively (774) 944 459 Reclassification adjustment for gains realized in net income (loss), net of tax of $(18) million, $(33) million and $(21) million, respectively (2) (55) (104) (67) Reversal of provision for credit losses realized in net income (loss), net of tax of nil, less than $(1) million and nil, respectively (3) — (2) — Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income (loss), net of tax of $4 million, $8 million and $4 million, respectively (4) 14 26 11 Total other comprehensive income (loss) for period (815) 864 403 Balance at end of period (65) 750 (116) Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread: Balance at beginning of period 15 (9) 301 Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $4 million, $8 million and $(68) million, respectively 12 24 (217) Reclassification adjustment for a gain realized in net income (loss), net of tax of $(30) million (5) — — (93) Total other comprehensive income (loss) for period 12 24 (310) Balance at end of period 27 15 (9) Unrealized gains (losses) on derivatives designated as cash flow hedges: Balance at beginning of period (79) (151) (159) Other comprehensive income (loss) for period: Net unrealized gains (losses) arising during period, net of tax of $(16) million, $20 million and $(5) million, respectively (49) 64 (19) Reclassification adjustment for (gains) losses realized in net income (loss), net of tax of $(3) million, $3 million and $8 million, respectively (6) (10) 8 27 Total other comprehensive income (loss) for period (59) 72 8 Balance at end of period (138) (79) (151) Pension and postretirement benefit liability: Balance at beginning of period (7) (3) 11 Other comprehensive income (loss) for period: Change in unfunded pension and postretirement liability, net of tax of $1 million, $(1) million and $(5) million, respectively 4 (4) (14) Total other comprehensive income (loss) for period 4 (4) (14) Balance at end of period (3) (7) (3) Total accumulated other comprehensive income (loss) at end of period $ (179) $ 679 $ (279) (1) As a result of adopting new accounting guidance in 2020, beginning January 1, 2020, an allowance for credit losses is recognized for debt securities, with changes in the allowance recorded in earnings. Prior to January 1, 2020, debt securities were assessed for other-than-temporary impairment. (2) Amount reclassified to net income (loss) is included in other securities gains, net in our consolidated statement of income (loss). (3) Changes in the allowance for credit losses on securities available-for-sale are included in the provision for credit losses in our consolidated statement of income (loss). (4) Amount amortized to net income (loss) is included in interest income in our consolidated statement of income (loss). During 2014, we transferred securities from available-for-sale to held-to-maturity. At the date of transfer, AOCI included net pretax unrealized losses related to the transferred securities which are being amortized over the remaining contractual life of each security as an adjustment of yield in a manner consistent with the amortization of any premium or discount. (5) In 2019, HSBC Bank USA repurchased long-term debt that was designated under fair value option. As a result, the cumulative gain attributable to our own credit spread associated with the debt was reclassified to other income (loss) in our consolidated statement of income (loss). (6) Amount reclassified to net income (loss) is included in net interest income in our consolidated statement of income (loss).

Pension and Other Postretirem_2

Pension and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2021
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Cost	Year Ended December 31, 2021 2020 2019 (in millions) Interest cost on projected benefit obligation $ 42 $ 45 $ 56 Expected return on plan assets (58) (68) (78) Amortization of net actuarial loss — 4 21 Administrative costs 3 4 4 Pension (income) expense $ (13) $ (15) $ 3
Schedule of Assumptions Used	The assumptions used in determining pension expense of the HSBC North America Pension Plan are as follows: 2021 2020 2019 Discount rate (1) 2.45% / 3.10% / 2.70% / 2.80% 3.15% / 3.20% / 2.70% / 2.55% 4.25% / 3.85% / 3.55% / 3.15% Expected long-term rate of return on Plan assets (2) 3.50 3.50 5.00 (1) Since the Plan is measured on a quarterly basis, pension expense for the Plan is calculated each quarter based on the preceding quarter-end rate. Shown are the discount rates used to determine pension expense for each respective quarter (i.e., first quarter / second quarter / third quarter / fourth quarter). Prior period amounts have been revised to conform to the current period presentation. (2) As a result of a significant decrease in yields on fixed income securities driven by the COVID-19 pandemic and subsequent reduction in longer term capital market returns, as well as a shift in investment mix that reduced the Plan's exposure to equity investments, HSBC North America decided to reduce its expected long-term rate of return on Plan assets assumption to 3.50 percent, effective beginning July 1, 2020. The expected long-term rate of return on Plan assets used during the first half of 2020 was 5.00 percent. The assumptions used in determining the benefit obligation of our postretirement benefit plans at December 31 are as follows: 2021 2020 2019 Discount rate 2.70 % 2.25 % 3.00 % Salary increase assumption 3.00 3.00 3.00

Fee Income from Contracts wit_2

Fee Income from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Fee Income	The following table summarizes fee income from contracts with customers disaggregated by type of activity, as well as a reconciliation to total other revenues, during the years ended December 31, 2021, 2020 and 2019. Following the table is a description of the various types of fee-based activities and how revenue associated with these activities is recognized. Year Ended December 31, 2021 2020 2019 (in millions) Credit card fees, net $ 37 $ 38 $ 67 Trust and investment management fees 108 132 132 Other fees and commissions: Account services 290 251 264 Credit facilities 320 268 302 Other fees 42 48 53 Total other fees and commissions 652 567 619 Servicing and other fees from HSBC affiliates 321 347 354 Insurance (1) 6 7 12 Total fee income from contracts with customers 1,124 1,091 1,184 Other non-fee revenues 113 444 670 Total other revenues (2) $ 1,237 $ 1,535 $ 1,854 (1) Included within other income (loss) in the consolidated statement of income (loss). (2) See Note 25, "Business Segments," for a reconciliation of total other revenues on a U.S. GAAP basis to other operating income for each business segment under the Group Reporting Basis.

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Summary of Related Party Transactions	The following tables and discussions below present the more significant related party balances and the income (expense) generated by related party transactions: At December 31, 2021 2020 (in millions) Assets: Cash and due from banks $ 300 $ 516 Interest bearing deposits with banks 59 187 Securities purchased under agreements to resell (1) 594 3,941 Trading assets 119 314 Loans 2,793 1,100 Other (2) 401 319 Total assets $ 4,266 $ 6,377 Liabilities: Deposits $ 9,137 $ 15,163 Trading liabilities (3) 130 2,375 Short-term borrowings 309 270 Long-term debt 5,511 2,878 Other (2) 277 268 Total liabilities $ 15,364 $ 20,954 (1) Reflects purchases of securities under which other HSBC affiliates have agreed to repurchase. (2) Other assets and other liabilities primarily consist of derivative balances associated with hedging activities and other miscellaneous account receivables and payables. (3) The decrease in trading liabilities at December 31, 2021 primarily reflects a decrease in borrowing of gold inventory from HSBC Bank plc to support client activity levels. Year Ended December 31, 2021 2020 2019 (in millions) Income (Expense): Interest income $ 26 $ 55 $ 168 Interest expense (237) (354) (538) Net interest expense (211) (299) (370) Trading revenue (expense) (3,182) (93) (2,669) Servicing and other fees from HSBC affiliates: HSBC Bank plc 176 186 171 HSBC Markets (USA) Inc. ("HMUS") 91 107 111 Other HSBC affiliates 54 54 72 Total servicing and other fees from HSBC affiliates 321 347 354 Gain on instruments designated at fair value and related derivatives 1,128 699 1,986 Support services from HSBC affiliates: HTSU (1,061) (1,066) (1,153) HMUS (118) (89) (100) Other HSBC affiliates (441) (396) (385) Total support services from HSBC affiliates (1,620) (1,551) (1,638) Rental income from HSBC affiliates, net (1) 42 44 55 Stock based compensation expense (2) (15) (22) (25) (1) We receive rental income from our affiliates, and in some cases pay rental expense to our affiliates, for certain office space. Net rental income from our affiliates is recorded as a component of occupancy expense, net in our consolidated statement of income (loss). (2) Employees may participate in one or more stock compensation plans sponsored by HSBC. These expenses are included in salaries and employee benefits in our consolidated statement of income (loss). Certain employees are also eligible to participate in a defined benefit pension plan and other postretirement plans sponsored by HSBC North America which are discussed in Note 22, "Pension and Other Postretirement Benefits."
Schedule of Loan Balances Outstanding with Affiliates	At December 31, 2021 and 2020, we had the following loan balances outstanding with HSBC affiliates: At December 31, 2021 2020 (in millions) HMUS and subsidiaries $ 1,576 $ 1,088 HSBC North America 1,000 — Other short-term affiliate lending 217 12 Total loans $ 2,793 $ 1,100

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Reporting [Abstract]
Summary of Impacts of Changes to Internal Management Reporting	The following tables summarize the impact of this change on reported segment profit (loss) before tax, total assets and total deposits for the periods below: Year Ended Year Ended As Previously Reported After Reporting Changes As Previously Reported After Reporting Changes (in millions) Segment profit (loss) before tax: GBM $ 387 NSR $ 571 NSR GB NSR $ 209 NSR $ 544 MSS NSR 194 NSR 132 GBM Other NSR (16) NSR (105) NSR Not Separately Reported At December 31, 2020 At December 31, 2019 As Previously Reported After Reporting Changes As Previously Reported After Reporting Changes (in millions) Segment total assets: GBM $ 132,363 NSR $ 126,710 NSR GB NSR $ 11,473 NSR $ 16,002 MSS NSR 67,293 NSR 71,742 GBM Other (1) NSR 53,597 NSR 38,966 Segment total deposits: GBM $ 44,668 NSR $ 29,050 NSR GB NSR $ 37,320 NSR $ 24,596 MSS NSR 3,417 NSR 2,956 GBM Other NSR 3,931 NSR 1,498 NSR Not Separately Reported (1) Includes assets allocated from Markets Treasury.
Summary on Reconciliation of Results under Group Reporting Basis to US GAAP	The following table summarizes the results for each segment on a Group Reporting Basis, as well as provides a reconciliation of total results under the Group Reporting Basis to U.S. GAAP consolidated totals: Group Reporting Basis Consolidated Amounts GBM WPB CMB GB MSS GBM Other CC Total Group Reporting Basis Adjust- ments (1) Group Reporting Basis Reclassi- fications (2) U.S. GAAP (in millions) Year Ended December 31, 2021 Net interest income (expense) $ 801 $ 771 $ 315 $ 47 $ (24) $ (6) $ 1,904 $ 19 $ 160 $ 2,083 Other operating income 303 297 409 318 100 3 1,430 (51) (142) 1,237 Total operating income (expense) 1,104 1,068 724 365 76 (3) 3,334 (32) 18 3,320 Expected credit losses / provision for credit losses (21) (26) (157) — (1) — (205) (365) — (570) 1,125 1,094 881 365 77 (3) 3,539 333 18 3,890 Operating expenses 1,221 581 407 275 98 316 2,898 62 18 2,978 Profit (loss) before income tax $ (96) $ 513 $ 474 $ 90 $ (21) $ (319) $ 641 $ 271 $ — $ 912 Balances at end of period: Total assets $ 62,904 $ 43,052 $ 10,486 $ 43,007 $ 44,151 $ 1,746 $ 205,346 $ (16,114) $ — $ 189,232 Total loans, net 22,285 21,971 9,930 178 881 — 55,245 (1,991) 2,163 55,417 Goodwill — 358 — — — — 358 100 — 458 Total deposits 40,232 45,082 41,343 1,298 981 — 128,936 (2,889) 16,985 143,032 Year Ended December 31, 2020 Net interest income (expense) $ 837 $ 821 $ 369 $ 91 $ (62) $ (30) $ 2,026 $ 9 $ 139 $ 2,174 Other operating income 368 234 351 454 165 129 1,701 (46) (120) 1,535 Total operating income 1,205 1,055 720 545 103 99 3,727 (37) 19 3,709 Expected credit losses / provision for credit losses 189 293 139 — 1 — 622 188 — 810 1,016 762 581 545 102 99 3,105 (225) 19 2,899 Operating expenses 2,203 587 372 351 118 403 4,034 (172) 19 3,881 Profit (loss) before income tax $ (1,187) $ 175 $ 209 $ 194 $ (16) $ (304) $ (929) $ (53) $ — $ (982) Balances at end of period: Total assets $ 59,200 $ 36,354 $ 11,473 $ 67,293 $ 53,597 $ 1,760 $ 229,677 $ (33,243) $ — $ 196,434 Total loans, net 24,048 23,377 11,260 329 475 — 59,489 (2,307) 3,891 61,073 Goodwill — 358 — — — — 358 100 — 458 Total deposits 50,000 42,369 37,320 3,417 3,931 — 137,037 (4,253) 12,366 145,150 Year Ended December 31, 2019 Net interest income (expense) $ 1,018 $ 829 $ 513 $ 91 $ (83) $ (65) $ 2,303 $ 13 $ (204) $ 2,112 Other operating income 330 239 415 358 127 68 1,537 102 215 1,854 Total operating income 1,348 1,068 928 449 44 3 3,840 115 11 3,966 Expected credit losses / provision for credit losses 115 55 1 — — — 171 32 (8) 195 1,233 1,013 927 449 44 3 3,669 83 19 3,771 Operating expenses 1,645 581 383 317 149 238 3,313 169 19 3,501 Profit (loss) before income tax $ (412) $ 432 $ 544 $ 132 $ (105) $ (235) $ 356 $ (86) $ — $ 270 Balances at end of period: Total assets $ 50,851 $ 34,241 $ 16,002 $ 71,742 $ 38,966 $ 2,421 $ 214,223 $ (38,848) $ — $ 175,375 Total loans, net 24,243 24,647 15,875 777 907 — 66,449 (2,965) 4,432 67,916 Goodwill 693 358 — — — — 1,051 191 — 1,242 Total deposits 44,553 29,986 24,596 2,956 1,498 — 103,589 (4,747) 20,851 119,693 (1) Represents adjustments associated with differences between U.S. GAAP and the Group Reporting Basis. These adjustments, which are more fully described above, consist of the following: Net Other Provision Operating Profit (Loss) Total (in millions) December 31, 2021 Deposit incentives $ 13 $ — $ — $ 9 $ 4 $ (25) Derivatives — — — — — (16,172) Expected credit losses — — (272) — 272 (148) Goodwill — — — — — 100 Leases 16 — — 22 (6) 13 Loan origination (11) — — (20) 9 23 Loans held for sale — (31) (93) — 62 (31) Other long-lived assets impairment — — — 61 (61) 152 Pension and other postretirement benefit costs — — — (10) 10 — Renewable energy tax credit investments — (21) — — (21) 3 Securities transferred to held-to-maturity — — — — — (24) Other 1 1 — — 2 (5) Total adjustments $ 19 $ (51) $ (365) $ 62 $ 271 $ (16,114) December 31, 2020 Deposit incentives $ 14 $ — $ — $ 21 $ (7) $ (28) Derivatives — — — — — (33,163) Expected credit losses (4) — 200 — (204) (357) Goodwill impairment — — — 91 (91) 100 Leases 23 — — 14 9 33 Loan origination (24) (2) — (20) (6) 18 Loans held for sale — (25) (12) — (13) — Other long-lived assets impairment — — — (264) 264 201 Pension and other postretirement benefit costs — — — (15) 15 — Renewable energy tax credit investments — (11) — — (11) 2 Securities transferred to held-to-maturity — — — — — (38) Other — (8) — 1 (9) (11) Total adjustments $ 9 $ (46) $ 188 $ (172) $ (53) $ (33,243) December 31, 2019 Debt extinguishment $ — $ 123 $ — $ — $ 123 $ — Deposit incentives 15 — — 32 (17) (23) Derivatives — — — — — (38,651) Expected credit losses (3) (1) 32 — (36) (357) Goodwill impairment — — — 156 (156) 191 Leases 25 — — 8 17 15 Loan origination (27) — — (19) (8) 38 Loans held for sale 2 (1) — — 1 (5) Pension and other postretirement benefit costs — — — (12) 12 — Renewable energy tax credit investments — (7) — — (7) 3 Securities transferred to held-to-maturity — — — — — (65) Other 1 (12) — 4 (15) 6 Total adjustments $ 13 $ 102 $ 32 $ 169 $ (86) $ (38,848) (2) Represents differences in financial statement presentation between U.S. GAAP and the Group Reporting Basis.

Retained Earnings and Regulat_2

Retained Earnings and Regulatory Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2021
Retained Earnings Note Disclosure [Abstract]
Capital Amounts and Ratios in Accordance With Current Banking Regulations	The following table summarizes the capital amounts and ratios of HSBC USA and HSBC Bank USA, calculated in accordance with the Basel III rule at December 31, 2021 and 2020: December 31, 2021 December 31, 2020 Capital Well-Capitalized Ratio (1) Actual Capital Well-Capitalized Ratio (1) Actual (dollars are in millions) Common equity Tier 1 ratio: (4) HSBC USA $ 15,341 4.5 % (2) 15.1 % $ 15,891 4.5 % (2) 14.5 % HSBC Bank USA 17,665 6.5 17.6 18,180 6.5 16.4 Tier 1 capital ratio: (4) HSBC USA 16,606 6.0 16.3 17,156 6.0 15.6 HSBC Bank USA 20,165 8.0 20.1 20,680 8.0 18.7 Total capital ratio: (4) HSBC USA 18,821 10.0 18.5 20,680 10.0 18.8 HSBC Bank USA 22,157 10.0 22.1 23,303 10.0 21.1 Tier 1 leverage ratio: HSBC USA 16,606 4.0 (2) 8.5 17,156 4.0 (2) 8.6 HSBC Bank USA 20,165 5.0 10.5 20,680 5.0 10.3 Supplementary leverage ratio ("SLR"): HSBC USA 16,606 3.0 (3) 6.6 17,156 3.0 (3) 7.8 HSBC Bank USA 20,165 3.0 (3) 8.1 20,680 3.0 (3) 9.3 Risk-weighted assets: (4)(5) HSBC USA 101,827 109,809 HSBC Bank USA 100,363 110,682 Adjusted quarterly average assets: (6) HSBC USA 194,469 198,698 HSBC Bank USA 192,521 200,026 Total leverage exposure: (7) HSBC USA 251,531 221,216 HSBC Bank USA 248,584 221,334 (1) HSBC USA and HSBC Bank USA are categorized as "well-capitalized," as defined by their principal regulators. To be categorized as well-capitalized under regulatory guidelines, a banking institution must maintain capital equal to or in excess of the ratios reflected in the above table, and must not be subject to a directive, order, or written agreement to meet and maintain specific capital levels. (2) There are no common equity Tier 1 or Tier 1 leverage ratio components in the definition of a well-capitalized bank holding company. The ratios shown are the regulatory minimums. (3) There is no SLR component in the definition of a well-capitalized banking institution. The ratios shown are the regulatory minimums. (4) During the first quarter of 2021, it was determined that certain collateral did not qualify for risk-weighted asset reduction purposes under U.S. capital rules. As a result, reported risk-weighted assets were understated and reported Common equity Tier 1 capital, Tier 1 capital and Total capital ratios were overstated at HSBC USA and HSBC Bank USA at December 31, 2020. We have revised December 31, 2020 amounts to conform to the current period presentation. The following table summarizes the impact of this change on reported risk-weighted assets and capital ratios as of December 31, 2020: December 31, 2020 As Previously Reported As Revised HSBC USA HSBC Bank USA HSBC USA HSBC Bank USA (in millions) Common equity Tier 1 ratio 14.7 % 17.2 % 14.5 % 16.4 % Tier 1 capital ratio 15.9 % 19.6 % 15.6 % 18.7 % Total capital ratio 19.2 % 22.0 % 18.8 % 21.1 % Risk-weighted assets $ 107,808 $ 105,681 $ 109,809 $ 110,682 (5) Calculated using the generally-applicable Standardized Approach. (6) Represents the Tier 1 leverage ratio denominator which reflects quarterly average assets adjusted for amounts permitted to be deducted from Tier 1 capital. (7) Represents the SLR denominator which includes adjusted quarterly average assets plus certain off-balance sheet exposures.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Assets and Liabilities Related to Consolidated Variable Interest Entities	The following table summarizes assets and liabilities related to our consolidated VIEs at December 31, 2021 and 2020 which are consolidated on our balance sheet. Assets and liabilities exclude intercompany balances that eliminate in consolidation. December 31, 2021 December 31, 2020 Consolidated Consolidated Consolidated Consolidated (in millions) Low income housing limited liability partnership: Other assets $ 54 $ — $ 79 $ — Interest, taxes and other liabilities — 7 — 9 Subtotal 54 7 79 9 Venture debt financing entity: Loans 46 — 10 — Other assets 1 — — — Interest, taxes and other liabilities — 2 — 1 Subtotal 47 2 10 1 Total $ 101 $ 9 $ 89 $ 10
Variable Interests Held by Us and Our Maximum Exposure to Loss Rising From Our Involvements in Those VIEs	The following table provides additional information on these unconsolidated VIEs, including the variable interests held by us and our maximum exposure to loss arising from our involvement in these VIEs, at December 31, 2021 and 2020: Total Assets Held by Unconsolidated VIEs Carrying Value of Variable Interests Held Reported as Maximum Assets Liabilities (in millions) At December 31, 2021 Limited partnership investments $ 6,700 $ 825 $ 407 $ 825 Asset-backed financing SPE 1,033 873 — 873 Total $ 7,733 $ 1,698 $ 407 $ 1,698 At December 31, 2020 Limited partnership investments $ 4,266 $ 629 $ 285 $ 629

Guarantee Arrangements, Pledg_2

Guarantee Arrangements, Pledged Assets and Repurchase Agreements (Tables)	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Carrying Value and Contractual Amounts of our Sell Protection Credit Derivatives and Major Off-Balance Sheet Guarantee Arrangements	The following table presents total carrying value and contractual amounts of our sell protection credit derivatives and major off-balance sheet guarantee arrangements at December 31, 2021 and 2020. Following the table is a description of the various arrangements. December 31, 2021 December 31, 2020 Carrying Notional / Maximum Carrying Notional / Maximum (in millions) Credit derivatives (1)(2) $ 7 $ 2,174 $ 144 $ 19,500 Financial standby letters of credit, net of participations (3)(4) — 5,339 — 5,703 Performance standby letters of credit, net of participations (3)(4) — 2,961 — 2,842 Total $ 7 $ 10,474 $ 144 $ 28,045 (1) Includes $1,591 million and $13,550 million of notional issued for the benefit of HSBC affiliates at December 31, 2021 and 2020, respectively. (2) For credit derivatives, the maximum loss is represented by the notional amounts without consideration of mitigating effects from collateral or recourse arrangements. (3) Includes $1,969 million and $1,836 million of both financial and performance standby letters of credit issued for the benefit of HSBC affiliates at December 31, 2021 and 2020, respectively. (4) For standby letters of credit, maximum loss represents losses to be recognized assuming the letters of credit have been fully drawn and the obligors have defaulted with zero recovery.
Net Credit Derivative Positions	The following table summarizes our net credit derivative positions at December 31, 2021 and 2020: December 31, 2021 December 31, 2020 Carrying / Fair Notional Carrying / Fair Notional (in millions) Sell-protection credit derivative positions $ 7 $ 2,174 $ 144 $ 19,500 Buy-protection credit derivative positions (62) 4,849 (74) 33,111 Net position (1) $ (55) $ 2,675 $ 70 $ 13,611
Summary of Credit Ratings of Credit Risk Related Guarantees	The following table summarizes the credit ratings related to guarantees including the ratings of counterparties against which we sold credit protection and financial standby letters of credit at December 31, 2021 as an indicative proxy of payment risk: Average Credit Ratings of the Obligors Notional/Contractual Amounts Investment Non-Investment Total (dollars are in millions) Sell-protection Credit Derivatives (1) Single name credit default swaps ("CDS") 2.2 $ 1,125 $ 594 $ 1,719 Index credit derivatives 13.5 400 55 455 Subtotal 1,525 649 2,174 Standby Letters of Credit (2) 1.3 6,478 1,822 8,300 Total $ 8,003 $ 2,471 $ 10,474 (1) The credit ratings in the table represent external credit ratings for classification as investment grade and non-investment grade. (2) External ratings for most of the obligors are not available. Presented above are the internal credit ratings which are developed using similar methodologies and rating scale equivalent to external credit ratings for purposes of classification as investment grade and non-investment grade.
Summary of Pledged Assets Included in Consolidated Balance Sheet	Pledged assets included in the consolidated balance sheet consisted of the following: At December 31, 2021 2020 (in millions) Interest bearing deposits with banks (1) $ 563 $ 2,158 Trading assets (2) 1,773 1,265 Securities available-for-sale (3) 7,618 8,652 Securities held-to-maturity (3) 599 1,076 Loans (4) 17,777 18,146 Other assets (5) 1,211 2,352 Total $ 29,541 $ 33,649 (1) Represents gross amount of cash on deposit with banks related to derivative collateral-support agreements, of which a majority has been netted against derivative liabilities on the consolidated balance sheet. (2) Trading assets are primarily pledged against liabilities associated with repurchase agreements. (3) Securities are primarily pledged against derivatives, public fund deposits, trust deposits and various short-term and long term borrowings, as well as providing capacity for potential secured borrowings from the FHLB and the Federal Reserve Bank of New York. (4) Loans are primarily residential mortgage loans pledged against current and potential borrowings from the FHLB and the Federal Reserve Bank of New York. (5) Represents gross amount of cash on deposit with non-banks related to derivative collateral support agreements, of which a majority has been netted against derivative liabilities on the consolidated balance sheet.
Offsetting Assets and Liabilities	The following table provides information about resale and repurchase agreements that are subject to offset at December 31, 2021 and 2020: Gross Amounts Not Offset in the Balance Sheet Gross Amounts Recognized Gross Amounts Offset in the Balance Sheet (1) Net Amounts Presented in the Balance Sheet Financial Instruments (2) Cash Collateral Received / Pledged Net Amount (3) (in millions) At December 31, 2021 Assets: Securities purchased under resale agreements $ 12,871 $ 2,357 $ 10,514 $ 10,464 $ 50 $ — Liabilities: Securities sold under repurchase agreements $ 4,672 $ 2,357 $ 2,315 $ 2,315 $ — $ — At December 31, 2020 Assets: Securities purchased under resale agreements $ 41,382 $ 5,636 $ 35,746 $ 35,746 $ — $ — Liabilities: Securities sold under repurchase agreements $ 7,401 $ 5,636 $ 1,765 $ 1,762 $ — $ 3 (1) Represents recognized amount of resale and repurchase agreements with counterparties subject to legally enforceable netting agreements that meet the applicable netting criteria as permitted by generally accepted accounting principles. (2) Represents securities received or pledged to cover financing transaction exposures. (3) Represents the amount of our exposure that is not collateralized / covered by pledged collateral.
Class of Collateral Pledged and Remaining Contractual Maturity of Repurchase Agreements Accounted for as Secured Borrowings	The following table provides the class of collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings at December 31, 2021 and 2020: Overnight and Continuous Up to 30 Days 31 to 90 Days 91 Days to One Year Greater Than One Year Total (in millions) At December 31, 2021 U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities $ — $ 3,442 $ 1,151 $ 79 $ — $ 4,672 At December 31, 2020 U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities $ 4,091 $ 2,810 $ 500 $ — $ — $ 7,401

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Assets and Liabilities Recorded at Fair Value on a Recurring Basis	The following table presents information about our assets and liabilities measured at fair value on a recurring basis at December 31, 2021 and 2020, and indicates the fair value hierarchy of the valuation techniques utilized to determine such fair value. Unless otherwise noted below, assets and liabilities in the following table are recorded at fair value through net income (loss). Fair Value Measurements on a Recurring Basis December 31, 2021 Level 1 Level 2 Level 3 Gross Netting (6) Net (in millions) Assets: Trading assets, excluding derivatives: U.S. Treasury, U.S. Government agencies and sponsored enterprises $ 2,337 $ 432 $ — $ 2,769 $ — $ 2,769 Debt securities issued by foreign entities 134 33 — 167 — 167 Equity securities 15,795 — — 15,795 — 15,795 Precious metals trading — 3,907 — 3,907 — 3,907 Derivatives: (1) Interest rate contracts 8 1,839 1 1,848 — 1,848 Foreign exchange contracts — 11,350 — 11,350 — 11,350 Equity contracts — 1,845 213 2,058 — 2,058 Precious metals contracts 4 936 — 940 — 940 Credit contracts — 28 — 28 — 28 Other contracts (2) — — 5 5 — 5 Derivatives netting — — — — (14,788) (14,788) Total derivatives 12 15,998 219 16,229 (14,788) 1,441 Securities available-for-sale: (3) U.S. Treasury, U.S. Government agencies and sponsored enterprises 10,817 22,049 — 32,866 — 32,866 Asset-backed securities: Home equity — — 19 19 — 19 Other — — 101 101 — 101 Debt securities issued by foreign entities 2,201 111 — 2,312 — 2,312 Loans held for sale (4) — 48 — 48 — 48 Other assets: Mortgage servicing rights — — 16 16 — 16 Equity securities — 144 — 144 — 144 Equity securities measured at net asset value (5) — — — 138 — 138 Total assets $ 31,296 $ 42,722 $ 355 $ 74,511 $ (14,788) $ 59,723 Liabilities: Domestic deposits (4) $ — $ 2,214 $ 535 $ 2,749 $ — $ 2,749 Trading liabilities, excluding derivatives 1,103 46 — 1,149 — 1,149 Derivatives: (1) Interest rate contracts 10 1,888 1 1,899 — 1,899 Foreign exchange contracts — 11,124 2 11,126 — 11,126 Equity contracts — 1,194 167 1,361 — 1,361 Precious metals contracts — 779 — 779 — 779 Credit contracts — 80 2 82 — 82 Other contracts (2) — — 38 38 — 38 Derivatives netting — — — — (13,287) (13,287) Total derivatives 10 15,065 210 15,285 (13,287) 1,998 Long-term debt (4) — 7,089 1,853 8,942 — 8,942 Total liabilities $ 1,113 $ 24,414 $ 2,598 $ 28,125 $ (13,287) $ 14,838 Fair Value Measurements on a Recurring Basis December 31, 2020 Level 1 Level 2 Level 3 Gross Netting (6) Net (in millions) Assets: Trading assets, excluding derivatives: U.S. Treasury, U.S. Government agencies and sponsored enterprises $ 5,145 $ 192 $ — $ 5,337 $ — $ 5,337 Asset-backed securities: Collateralized debt obligations — 63 — 63 — 63 Residential mortgages — — 15 15 — 15 Student loans — 65 — 65 — 65 Debt securities issued by foreign entities 7,953 18 — 7,971 — 7,971 Equity securities 6,043 — — 6,043 — 6,043 Precious metals trading — 4,989 — 4,989 — 4,989 Derivatives: (1) Interest rate contracts 15 6,637 35 6,687 — 6,687 Foreign exchange contracts — 18,452 15 18,467 — 18,467 Equity contracts — 5,051 565 5,616 — 5,616 Precious metals contracts — 1,323 — 1,323 — 1,323 Credit contracts — 298 69 367 — 367 Other contracts (2) — — 8 8 — 8 Derivatives netting — — — — (29,616) (29,616) Total derivatives 15 31,761 692 32,468 (29,616) 2,852 Securities available-for-sale: (3) U.S. Treasury, U.S. Government agencies and sponsored enterprises 22,880 12,528 — 35,408 — 35,408 Asset-backed securities: Home equity — — 27 27 — 27 Other — — 104 104 — 104 Debt securities issued by foreign entities 1,942 3,191 — 5,133 — 5,133 Loans (4) — 32 — 32 — 32 Loans held for sale (4) — 36 — 36 — 36 Other assets: Mortgage servicing rights — — 7 7 — 7 Equity securities — 149 — 149 — 149 Equity securities measured at net asset value (5) — — — 135 — 135 Total assets $ 43,978 $ 53,024 $ 845 $ 97,982 $ (29,616) $ 68,366 Liabilities: Domestic deposits (4) $ — $ 3,509 $ 646 $ 4,155 $ — $ 4,155 Trading liabilities, excluding derivatives 727 2,312 — 3,039 — 3,039 Derivatives: (1) Interest rate contracts 9 6,615 1 6,625 — 6,625 Foreign exchange contracts — 18,597 6 18,603 — 18,603 Equity contracts — 3,845 446 4,291 — 4,291 Precious metals contracts 28 1,550 — 1,578 — 1,578 Credit contracts — 291 6 297 — 297 Other contracts (2) — — 67 67 — 67 Derivatives netting — — — — (28,914) (28,914) Total derivatives 37 30,898 526 31,461 (28,914) 2,547 Long-term debt (4) — 10,277 448 10,725 — 10,725 Total liabilities $ 764 $ 46,996 $ 1,620 $ 49,380 $ (28,914) $ 20,466 (1) Includes trading derivative assets of $1,405 million and $2,801 million and trading derivative liabilities of $1,874 million and $2,358 million at December 31, 2021 and 2020, respectively, as well as derivatives held for hedging and commitments accounted for as derivatives. See Note 16, "Derivative Financial Instruments," for additional information. Excluding changes in fair value of a derivative instrument associated with a qualifying cash flow hedge, which are recognized initially in other comprehensive income (loss), derivative assets and liabilities are recorded at fair value through net income (loss). (2) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares. (3) Securities available-for-sale are recorded at fair value through other comprehensive income (loss). Changes in the allowance for credit losses on securities available-for-sale are recorded through net income (loss). (4) See Note 17, "Fair Value Option," for additional information. Excluding the fair value movement on fair value option liabilities attributable to our own credit spread, which is recorded in other comprehensive income (loss), fair value option assets and liabilities are recorded at fair value through net income (loss). (5) Investments that are measured at fair value using the net asset value per share practical expedient have not been classified in the fair value hierarchy. (6) Represents counterparty and cash collateral netting which allow the offsetting of amounts relating to certain contracts if certain conditions are met.
Changes in Fair Value of Level 3 Assets and Liabilities	The following table summarizes additional information about changes in the fair value of Level 3 assets and liabilities during 2021 and 2020. As a risk management practice, we may risk manage the Level 3 assets and liabilities, in whole or in part, using securities and derivative positions that are classified as Level 1 or Level 2 measurements within the fair value hierarchy. Since those Level 1 and Level 2 risk management positions are not included in the table below, the information provided does not reflect the effect of such risk management activities related to the Level 3 assets and liabilities. Jan. 1, Total Realized / Unrealized Gains Purch- Issu- Settle- Transfers Transfers Dec. 31, Current Period Unrealized Gains Earnings Other Compre- Earnings Other Compre- (in millions) Assets: Trading assets, excluding derivatives: (1) Residential mortgage asset-backed securities $ 15 $ 9 $ — $ — $ — $ — $ — $ (24) $ — $ — $ — Derivatives, net: (2) Interest rate contracts 34 (34) — — — — — — — (4) — Foreign exchange contracts 9 (11) — — — — — — (2) — — Equity contracts 119 (214) — — — 84 (27) 84 46 14 — Credit contracts 63 (65) — — — — — — (2) (2) — Other contracts (3) (59) (2) — — — 28 — — (33) — — Asset-backed securities available-for-sale (4) 131 — (3) — — (8) — — 120 — (3) Mortgage servicing rights (5) 7 — — — 9 — — — 16 — — Total assets $ 319 $ (317) $ (3) $ — $ 9 $ 104 $ (27) $ 60 $ 145 $ 8 $ (3) Liabilities: Domestic deposits (6) $ (646) $ (16) $ 2 $ — $ — $ 184 $ (151) $ 92 $ (535) $ (16) $ 2 Long-term debt (6) (448) (35) — — (1,732) 408 (100) 54 (1,853) (13) — Total liabilities $ (1,094) $ (51) $ 2 $ — $ (1,732) $ 592 $ (251) $ 146 $ (2,388) $ (29) $ 2 Jan. 1, Total Realized / Unrealized Gains Purch- Issu- Settle- Transfers Transfers Dec. 31, Current Period Earnings Other Compre- Earnings Other Compre- (in millions) Assets: Trading assets, excluding derivatives: (1) Residential mortgage asset-backed securities $ 17 $ (2) $ — $ — $ — $ — $ — $ — $ 15 $ (2) $ — Corporate and other domestic debt securities 510 (13) — — — (497) — — — — — Derivatives, net: (2) Interest rate contracts 10 23 — — — — 1 — 34 23 — Foreign exchange contracts (1) (1) — — — — 11 — 9 (1) — Equity contracts 72 129 — — — (47) (37) 2 119 147 — Credit contracts 59 7 — — — (3) — — 63 (7) — Other contracts (3) (75) (9) — — — 25 — — (59) — — Asset-backed securities available-for-sale (4) 111 — (9) — — 1 28 — 131 — (9) Mortgage servicing rights (5) 4 (2) — — 5 — — — 7 (2) — Total assets $ 707 $ 132 $ (9) $ — $ 5 $ (521) $ 3 $ 2 $ 319 $ 158 $ (9) Liabilities: Domestic deposits (6) $ (774) $ (15) $ (2) $ — $ (43) $ 125 $ — $ 63 $ (646) $ (20) $ (2) Long-term debt (6) (354) (12) — — (262) 159 (1) 22 (448) (30) — Total liabilities $ (1,128) $ (27) $ (2) $ — $ (305) $ 284 $ (1) $ 85 $ (1,094) $ (50) $ (2) (1) Gains (losses) on trading assets, excluding derivatives are included in trading revenue in the consolidated statement of income (loss). (2) Level 3 net derivatives included derivative assets of $219 million and derivative liabilities of $210 million at December 31, 2021 and derivative assets of $692 million and derivative liabilities of $526 million at December 31, 2020. Gains (losses) on derivatives, net are predominantly included in trading revenue and gain (loss) on instruments designated at fair value and related derivatives in the consolidated statement of income (loss). (3) Consists of swap agreements entered into in conjunction with the sales of Visa Class B Shares. Gains (losses) on these swap agreements are included in other income (loss) in the consolidated statement of income (loss). (4) Realized gains (losses) on securities available-for-sale are included in other securities gains, net in the consolidated statement of income (loss). Changes in the allowance for credit losses on securities available-for-sale are included in the provision for credit losses in the consolidated statement of income (loss). Unrealized gains (losses) on securities available-for-sale are included in other comprehensive income (loss). (5) Gain (losses) on mortgage servicing rights are included in other income (loss) in the consolidated statement of income (loss). (6) Excluding unrealized gains (losses) on fair value option liabilities attributable to our own credit spread, which are recorded in other comprehensive income (loss), gains (losses) on fair value option liabilities are included in gain (loss) on instruments designated at fair value and related derivatives in the consolidated statement of income (loss).
Quantitative Information about Recurring Fair Value Measurement of Assets and Liabilities Classified as Level 3	The following table presents quantitative information about the unobservable inputs used to determine the recurring fair value measurement of assets and liabilities classified as Level 3 fair value measurements at December 31, 2021 and 2020: December 31, 2021 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Interest rate derivative contracts $ — Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model Probability to fund for rate lock commitments 36% - 99% 83% Interest rate yield curve 8% N/A Foreign exchange derivative contracts (2) $ (2) Option pricing model Implied volatility of currency pairs 0% - 9% 6% Cross-currency basis (86)bps N/A Equity derivative contracts (2) $ 46 Option pricing model Equity / Equity Index volatility 8% - 85% 40% Equity / Equity and Equity / Index correlation 44% - 98% 81% Equity dividend yields and forward price (4)% - 1% 0% Credit derivative contracts $ (2) Option pricing model and, where applicable, discounted cash flows Credit default swap spreads 76bps - 325bps 234bps Other derivative contracts $ (33) Discounted cash flows Conversion rate 1.6 times N/A Expected duration 1.0 year N/A Asset-backed securities available-for-sale $ 120 Discounted cash flows Market assumptions related to yields for comparable instruments 3% - 4% 3% Mortgage servicing rights $ 16 Discounted cash flows Constant prepayment rates 10% - 16% 12% Discount rate 8% - 13% 8% Estimated annualized costs to service $72 - $85 per account $75 per account Domestic deposits (structured deposits) (2)(3) $ (535) Option adjusted discounted cash flows Equity / Equity Index volatility 8% - 21% 15% Equity / Equity and Equity / Index correlation 49% - 85% 62% Long-term debt (structured notes) (2)(3) $ (1,853) Option adjusted discounted cash flows Implied volatility of currency pairs 0% - 9% 6% Equity / Equity Index volatility 8% - 71% 31% Equity / Equity and Equity / Index correlation 44% - 98% 82% Credit default swap spreads 798bps N/A December 31, 2020 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Residential mortgage asset-backed securities $ 15 Broker quotes or consensus pricing and, where applicable, discounted cash flows Prepayment rates 10% N/A Conditional default rates 5% N/A Loss severity rates 65% N/A Discount margin 500bps N/A Interest rate derivative contracts $ 34 Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model Probability to fund for rate lock commitments 41% - 100% 78% Likelihood of transaction being executed 90% N/A Interest rate yield curve 4% - 7% 6% Foreign exchange derivative contracts (2) $ 9 Option pricing model Implied volatility of currency pairs 9% - 11% 10% Cross-currency basis (9)bps - 40bps 24bps Equity derivative contracts (2) $ 119 Option pricing model Equity / Equity Index volatility 0% - 67% 27% Equity / Equity and Equity / Index correlation 17% - 62% 30% Equity dividend yields and forward price (1)% - 0% 0% Credit derivative contracts $ 63 Option pricing model and, where applicable, discounted cash flows Credit default swap spreads 150bps N/A Other derivative contracts $ (59) Discounted cash flows Conversion rate 1.6 times N/A Expected duration 2 years N/A Asset-backed securities available-for-sale $ 131 Discounted cash flows Market assumptions related to yields for comparable instruments 4% N/A Mortgage servicing rights $ 7 Discounted cash flows Constant prepayment rates 17% - 26% 19% Discount rate 9% - 10% 9% Estimated annualized costs to service $73 - $157 per account $76 per account Domestic deposits (structured deposits) (2)(3) $ (646) Option adjusted discounted cash flows Implied volatility of currency pairs 9% - 11% 10% Equity / Equity Index volatility 0% - 42% 15% Equity / Equity and Equity / Index correlation 43% - 47% 45% Long-term debt (structured notes) (2)(3) $ (448) Option adjusted discounted cash flows Implied volatility of currency pairs 9% - 11% 10% Equity / Equity Index volatility 0% - 67% 23% Equity / Equity and Equity / Index correlation 32% - 62% 52% (1) For foreign exchange derivatives, equity derivatives, credit derivatives, structured deposits and structured notes, weighted averages are calculated based on the fair value of the instruments. For all remaining instrument types, weighted averages are calculated based on the notional value of the instruments. (2) We are the client-facing entity and, except for structured notes and deposits with embedded credit derivative features, we enter into identical but opposite derivatives to transfer the resultant risks to our affiliates. With the exception of counterparty credit risks, we are market risk neutral in substantially all of the structured notes and deposits. The corresponding intra-group derivatives are presented as equity derivatives and foreign exchange derivatives in the table. (3) Structured deposits and structured notes contain embedded derivative features whose fair value measurements contain significant Level 3 inputs. See equity and foreign exchange derivatives and credit derivatives below for a discussion of the uncertainty of Level 3 inputs related to structured deposits and structured notes. N/A Not Applicable
Assets and Liabilities Recorded at Fair Value on a Non Recurring Basis	The following table presents the fair value hierarchy level within which the fair value of the financial and non-financial assets has been recorded at December 31, 2021 and 2020. The gains (losses) during 2021 and 2020 are also included. Non-Recurring Fair Value Measurements Total Gains (Losses) For the Year Ended December 31, 2021 Level 1 Level 2 Level 3 Total (in millions) Consumer loans held for sale (1) $ — $ 24 $ 1,742 $ 1,766 $ (12) Consumer loans (2) — 102 — 102 10 Commercial loans held for sale (3) — 75 68 143 (17) Commercial loans (4) — — 186 186 60 Leases (5) — — 5 5 (103) Total assets at fair value on a non-recurring basis $ — $ 201 $ 2,001 $ 2,202 $ (62) Non-Recurring Fair Value Measurements Total Gains (Losses) For the Year Ended December 31, 2020 Level 1 Level 2 Level 3 Total (in millions) Consumer loans held for sale (1) $ — $ 4 $ — $ 4 $ — Consumer loans (2) — 312 — 312 18 Commercial loans held for sale (3) — 68 — 68 (23) Commercial loans (4) — — 270 270 (169) Real estate owned (6) — 1 — 1 2 Goodwill (7) — — — — (784) Leases (5) — — 3 3 (92) Total assets at fair value on a non-recurring basis $ — $ 385 $ 273 $ 658 $ (1,048) (1) At December 31, 2021 and 2020, the fair value of the loans held for sale was below cost. During 2021, certain consumer loans were transferred to held for sale for which significant inputs in estimating fair value were unobservable. (2) Represents residential mortgage loans held for investment whose carrying amount was adjusted during the period based on the fair value of the underlying collateral. (3) At December 31, 2021 and 2020, the fair value of the loans held for sale was below cost. During the second quarter of 2021, certain commercial loans were transferred to held for sale for which significant inputs in estimating fair value were unobservable. (4) Certain commercial loans are individually assessed for impairment. We measure the credit impairment of a collateral-dependent loan based on the fair value of the collateral asset. The collateral often involves real estate properties that are illiquid due to market conditions. As a result, these loans are classified as a Level 3 fair value measurement within the fair value hierarchy. (5) During the second quarter of 2021, we determined that we would exit certain branches and, as a result, the lease ROU assets, leasehold improvement assets and equipment assets associated with these branches were written off. During 2021, we also wrote down the lease ROU assets and leasehold improvement assets primarily associated with certain office space that we determined we would exit. In addition, during the fourth quarter of 2021, we transferred one of our owned office space properties to held for sale and, as a result, its carrying amount was written down to an estimated fair value of $5 million. During 2020, we determined that we would exit certain branches and, as a result, the lease ROU assets and leasehold improvement assets associated with these branches were written down based on their estimated remaining useful lives. During 2020, we also wrote down the lease ROU assets associated with certain office space that we determined we would exit. See Note 3, "Strategic Initiatives," and Note 12, "Leases", for further discussion. (6) Real estate owned is required to be reported on the balance sheet net of transactions costs. The real estate owned amounts in the table above reflect the fair value unadjusted for transaction costs. (7) During 2020, the goodwill allocated to our previously separate RBWM and PB businesses were both written down to $0 million. See Note 11, "Goodwill," for further discussion of the results of our goodwill impairment testing, including the events and circumstances leading to the impairments.
Quantitative Information about Non Recurring Fair Value Measurement of Assets and Liabilities	The following tables present quantitative information about non-recurring fair value measurements of assets and liabilities classified with Level 3 of the fair value hierarchy at December 31, 2021 and 2020: At December 31, 2021 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Consumer loans held for sale $ 1,742 Market comparables and internal assumptions Adjusted market price 10% - 100% 98% Commercial loans held for sale 68 Market comparables and internal assumptions Adjusted market price 94% N/A Commercial loans 186 Valuation of third party appraisal Loss severity rates 2% - 76% 23% At December 31, 2020 Financial Instrument Type Fair Value (in millions) Valuation Technique(s) Significant Unobservable Inputs Range of Inputs Weighted Average (1) Commercial loans $ 270 Valuation of third party appraisal Loss severity rates 0% - 76% 35% (1) Weighted average is calculated based on the carrying value of the loans. N/A Not Applicable
Additional Information Relating to Asset-Backed Securities and Collateralized Debt Obligations	The following tables provide additional information relating to our available-for-sale asset-backed securities at December 31, 2021: Rating of Securities: (1) Collateral Type: Level 3 (in millions) AAA - A Home equity - Alt A $ 19 BBB - B Other 101 $ 120 (1) We utilize S&P as the primary source of credit ratings in the tables above. If S&P ratings are not available, ratings by Moody's and Fitch are used in that order.
Carrying Value and Estimated Fair Value of Financial Instruments	The following table summarizes the carrying value and estimated fair value of our financial instruments, excluding financial instruments that are carried at fair value on a recurring basis, at December 31, 2021 and 2020, and their classification within the fair value hierarchy: December 31, 2021 Carrying Fair Level 1 Level 2 Level 3 (in millions) Financial assets: Short-term financial assets, net of allowance for credit losses $ 48,404 $ 48,404 $ 954 $ 47,400 $ 50 Federal funds sold and securities purchased under agreements to resell 10,514 10,514 — 10,514 — Securities held-to-maturity, net of allowance for credit losses 5,203 5,359 — 5,359 — Commercial loans, net of allowance for credit losses 39,376 39,862 — — 39,862 Commercial loans held for sale 438 443 — 359 84 Consumer loans, net of allowance for credit losses 16,041 15,672 — — 15,672 Consumer loans held for sale 3,731 3,809 — 77 3,732 Financial liabilities: Short-term financial liabilities $ 6,389 $ 6,389 $ — $ 6,338 $ 51 Deposits 131,533 131,533 — 131,533 — Deposits held for sale 8,750 8,750 — 8,750 — Long-term debt 8,294 8,861 — 8,861 — December 31, 2020 Carrying Fair Level 1 Level 2 Level 3 (in millions) Financial assets: Short-term financial assets, net of allowance for credit losses $ 15,667 $ 15,667 $ 1,302 $ 14,353 $ 12 Federal funds sold and securities purchased under agreements to resell 35,746 35,746 — 35,746 — Securities held-to-maturity, net of allowance for credit losses 8,981 9,369 — 9,369 — Commercial loans, net of allowance for credit losses 40,785 41,417 — — 41,417 Commercial loans held for sale 93 93 — 93 — Consumer loans, net of allowance for credit losses 20,256 19,865 — — 19,865 Consumer loans held for sale 208 217 — 217 — Financial liabilities: Short-term financial liabilities $ 4,965 $ 4,965 $ — $ 4,952 $ 13 Deposits 140,995 141,001 — 141,001 — Long-term debt 9,254 9,720 — 9,720 —

Financial Statements of HSBC _2

Financial Statements of HSBC USA Inc. (Parent) (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	Condensed parent company financial statements follow: Balance Sheet 2021 2020 (in millions) Assets: Securities held-to-maturity, net of allowance for credit losses of less than $1 million at both December 31, 2021 and 2020 (fair value of $1 million and $2 million at December 31, 2021 and 2020, respectively) $ 1 $ 2 Receivables and balances due from subsidiaries 12,944 14,585 Receivables from other HSBC affiliates 2,623 1,276 Investment in subsidiaries: Banking 20,672 21,897 Other 75 12 Other assets 153 182 Total assets $ 36,468 $ 37,954 Liabilities: Interest, taxes and other liabilities $ 48 $ 85 Payables due to subsidiaries 72 4 Payables due to other HSBC affiliates 65 32 Short-term borrowings 3,683 2,998 Short-term borrowings due to subsidiaries (1) 1,500 3,000 Long-term debt (2) 8,561 10,695 Long-term debt due to other HSBC affiliates (2) 5,499 2,849 Total liabilities 19,428 19,663 Total equity 17,040 18,291 Total liabilities and equity $ 36,468 $ 37,954 (1) Reflects borrowings from HSBC Bank USA. The outstanding balance matures in July 2023. (2) Contractual scheduled maturities for the debt over the next five years are as follows: 2022 – $2.9 billion; 2023 – $1.6 billion; 2024 – $2.0 billion; 2025 – $4.5 billion; 2026 – $0.6 billion; and thereafter – $2.5 billion.
Schedule of Condensed Income (Loss)	Statements of Income (Loss) and Comprehensive Income (Loss) 2021 2020 2019 (in millions) Income: Dividends from banking subsidiaries $ 102 $ 121 $ 138 Interest from subsidiaries 28 101 350 Interest from other HSBC affiliates 23 43 91 Other income from subsidiaries — — 2 Other income from other HSBC Affiliates 1,027 552 1,645 Other income (loss) (1,023) (544) (1,690) Total income 157 273 536 Expenses: Interest to subsidiaries 16 6 — Interest to other HSBC Affiliates 128 115 140 Other interest expense 40 228 549 Provision for credit losses — (1) — Other expenses with subsidiaries 19 15 12 Other expenses 1 3 5 Total expenses 204 366 706 Loss before taxes and equity in undistributed income (loss) of subsidiaries (47) (93) (170) Income tax benefit (33) (50) (78) Loss before equity in undistributed income (loss) of subsidiaries (14) (43) (92) Equity in undistributed income (loss) of subsidiaries 702 (897) 205 Net income (loss) $ 688 $ (940) $ 113 Other comprehensive income (loss) (858) 956 87 Comprehensive income (loss) $ (170) $ 16 $ 200
Schedule of Condensed Cash Flow Statement	Statement of Cash Flows 2021 2020 2019 (in millions) Cash flows from operating activities: Net income (loss) $ 688 $ (940) $ 113 Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Depreciation and amortization 1 2 5 Net change in other assets and liabilities (313) 256 1,463 Undistributed (income) loss of subsidiaries (702) 897 (205) Other, net (4) (2) 4 Cash provided by (used in) operating activities (330) 213 1,380 Cash flows from investing activities: Sales and maturities of securities 1 — — Net change in investments in and receivables due from subsidiaries 2,713 (552) 3,929 Net change in receivables from other HSBC affiliates (1,345) 1,056 183 Other, net — — 1 Cash provided by investing activities 1,369 504 4,113 Cash flows from financing activities: Net change in payables to other HSBC affiliates 13 (1) 4 Net change in short-term borrowings (815) 3,522 (56) Issuance of long-term debt 6,844 3,394 2,931 Repayment of long-term debt (6,000) (7,565) (5,897) Return of capital to parent (1,000) — (2,400) Other increases (decreases) in capital surplus (4) 10 — Dividends paid (77) (77) (77) Cash used in financing activities (1,039) (717) (5,495) Net change in cash and due from banks and interest bearing deposits with banks — — (2) Cash and due from banks and interest bearing deposits with banks at beginning of year — — 2 Cash and due from banks and interest bearing deposits with banks at end of year $ — $ — $ — Cash paid for: Interest $ 167 $ 379 $ 662

Summary of Significant Accoun_4

Summary of Significant Accounting Policies and New Accounting Pronouncements - Calculation of Lifetime ECL (Details)	12 Months Ended
	Dec. 31, 2021scenario
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of forward-looking economic scenarios	3
Reasonable and supportable forecast period for consensus economic scenarios	2 years
Reversion period for average historical values	20 years
Reversion period for most assumption variables	3 years
Consumer loans: | Residential mortgages | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Measurement input (in percent)	0.20
Consumer loans: | Residential mortgages | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Measurement input (in percent)	0.40
Consumer loans: | Home Equity Mortgages | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Measurement input (in percent)	0.70
Consumer loans: | Home Equity Mortgages | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Measurement input (in percent)	1

Summary of Significant Accoun_5

Summary of Significant Accounting Policies and New Accounting Pronouncements - Charge-Off and Nonaccrual Policies and Practices (Details)	12 Months Ended
	Dec. 31, 2021
Commercial loans:
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of days contractually delinquent	3 months
Consumer loans: | Residential mortgages
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of days contractually delinquent	3 months
Period of consecutive payments	6 months
Delinquent threshold period	6 months
Update period	180 days
Valuation period from fair value determination date	90 days
Consumer loans: | Credit cards
Financing Receivable, Allowance for Credit Loss [Line Items]
Delinquent threshold period	6 months
Notification period	60 days
Delinquent threshold period involving a bankruptcy	180 days
Consumer loans: | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Delinquent threshold period	4 months

Summary of Significant Accoun_6

Summary of Significant Accounting Policies and New Accounting Pronouncements - Properties and Equipment, Net (Details)	12 Months Ended
	Dec. 31, 2021
Minimum
Property, Plant and Equipment [Line Items]
Depreciable life	3 years
Maximum
Property, Plant and Equipment [Line Items]
Depreciable life	40 years

Strategic Initiatives - Narrati

Strategic Initiatives - Narrative (Details) - Restructuring Plan - USD ($) $ in Millions	12 Months Ended		36 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring charges recorded to date	$ 569
Restructuring charges	289	$ 280
Forecast
Restructuring Cost and Reserve [Line Items]
Expected period for completion of restructuring plan			3 years
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	780
Expected restructuring charges, after-tax	590
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	860
Expected restructuring charges, after-tax	$ 650

Strategic Initiatives - Expecte

Strategic Initiatives - Expected Charges (Details) - Restructuring Plan $ in Millions	Dec. 31, 2021USD ($)
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	$ 780
Minimum | Wealth and Personal Banking
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	215
Minimum | Commercial Banking
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	8
Minimum | Markets and Securities Services
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	82
Minimum | Global Banking and Markets Other
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	10
Minimum | Corporate Center
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	465
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	860
Maximum | Wealth and Personal Banking
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	235
Maximum | Commercial Banking
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	10
Maximum | Markets and Securities Services
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	88
Maximum | Global Banking and Markets Other
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	12
Maximum | Corporate Center
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges, pre-tax	$ 515

Strategic Initiatives - Restruc

Strategic Initiatives - Restructuring Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	$ 33	$ 0
Restructuring costs accrued during the period	65	57
Restructuring costs paid during the period	(42)	(24)
Restructuring liability at end of period	56	33
Severance and Other Employee Costs
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	10	0
Restructuring costs accrued during the period	12	28
Restructuring costs paid during the period	(12)	(18)
Restructuring liability at end of period	10	10
Lease Termination and Associated Costs
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	23	0
Restructuring costs accrued during the period	38	29
Restructuring costs paid during the period	(15)	(6)
Restructuring liability at end of period	46	23
Other
Restructuring Reserve [Roll Forward]
Restructuring liability at beginning of period	0	0
Restructuring costs accrued during the period	15	0
Restructuring costs paid during the period	(15)	0
Restructuring liability at end of period	$ 0	$ 0

Strategic Initiatives - Branch

Strategic Initiatives - Branch Closings (Details) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2021USD ($)branch	Mar. 31, 2020branch	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)branch
Restructuring Cost and Reserve [Line Items]
Number of branches closing | branch	30	60			20
Lease impairment charges			$ 63	$ 76	$ 13
Notional value of derivative contracts			1,395,345	2,021,133
Interest rate contracts
Restructuring Cost and Reserve [Line Items]
Notional value of derivative contracts			246,092	509,403
Write Down of Lease Right-of-use Assets, Net of Estimated Sublease Income | Occupancy Expense, Net
Restructuring Cost and Reserve [Line Items]
Lease impairment charges	$ 29			67
Write Down of Leasehold Improvement Assets | Occupancy Expense, Net
Restructuring Cost and Reserve [Line Items]
Fixed asset impairment charges	18		18	16
Write Down of Equipment Assets | Occupancy Expense, Net
Restructuring Cost and Reserve [Line Items]
Fixed asset impairment charges	$ 3
Write Down Owned Office Space Properties to Fair Value | Occupancy Expense, Net
Restructuring Cost and Reserve [Line Items]
Lease impairment charges			13
Lease Termination and Associated Costs | Occupancy Expense, Net
Restructuring Cost and Reserve [Line Items]
Lease impairment charges			40	9
Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Trading losses associated with exit of certain derivative contracts			35	67
Allocated restructuring costs from affiliates			86	64
Restructuring Plan | Interest rate contracts
Restructuring Cost and Reserve [Line Items]
Notional value of derivative contracts			25,900	64,600
HSBC Group Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Allocated restructuring costs from affiliates			$ 53	$ 16

Branch Assets and Liabilities_3

Branch Assets and Liabilities Held for Sale - Narrative (Details)		1 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
		May 31, 2021branch	Dec. 31, 2021USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Restructuring Cost and Reserve [Line Items]
Revenues associated with the disposal group as percent of consolidated revenues (percent)						7.00%
Loans held for sale	[1]		$ 4,217,000,000		$ 4,217,000,000	$ 4,217,000,000	$ 337,000,000
Reduction to the provision for credit losses			22,000,000
Consumer loans:
Restructuring Cost and Reserve [Line Items]
Loans held for sale			3,756,000,000		3,756,000,000	3,756,000,000	208,000,000
Reduction to the provision for credit losses			22,000,000
Credit cards
Restructuring Cost and Reserve [Line Items]
Loans held for sale				$ 1,100,000,000
Credit cards | Consumer loans:
Restructuring Cost and Reserve [Line Items]
Loans held for sale			195,000,000		195,000,000	195,000,000	$ 0
Retail Branches Sold
Restructuring Cost and Reserve [Line Items]
Assets held for sale			2,690,000,000		2,690,000,000	2,690,000,000
Liabilities held for sale			8,902,000,000		8,902,000,000	8,902,000,000
Transaction cost						8,000,000
Loans held for sale			2,441,000,000		2,441,000,000	2,441,000,000
Retail Branches Sold | Credit cards
Restructuring Cost and Reserve [Line Items]
Loans held for sale			178,000,000		178,000,000	178,000,000
Rebranding of Retail Branches | Minimum
Restructuring Cost and Reserve [Line Items]
Number of bank branches | branch		20
Rebranding of Retail Branches | Maximum
Restructuring Cost and Reserve [Line Items]
Number of bank branches | branch		25
Exit of Mass Market Retail Banking Business
Restructuring Cost and Reserve [Line Items]
Number of branches sold | branch		90
Assets held for sale				2,900,000,000
Liabilities held for sale				10,100,000,000
Lower of amortized cost or fair value adjustment				0
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Restructuring Cost and Reserve [Line Items]
Lower of amortized cost or fair value adjustment				0
Reduction to the provision for credit losses				101,000,000
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Consumer loans:
Restructuring Cost and Reserve [Line Items]
Lower of amortized cost or fair value adjustment				0	7,000,000
Loans held for sale			3,681,000,000	3,616,000,000	3,681,000,000	3,681,000,000
Reduction to the provision for credit losses				100,000,000
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Credit cards | Consumer loans:
Restructuring Cost and Reserve [Line Items]
Loans held for sale			$ 195,000,000	$ 829,000,000	$ 195,000,000	$ 195,000,000
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Branch Assets and Liabilities_4

Branch Assets and Liabilities Held for Sale Groups - Disposal Group (Details) - USD ($)		3 Months Ended		6 Months Ended
		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale	[1]	$ 4,217,000,000		$ 4,217,000,000	$ 337,000,000
Other branch related assets held for sale:
Total other branch related assets held for sale	[1]	249,000,000		249,000,000	0
Deposits held for sale		8,750,000,000		8,750,000,000	0	[1]
Other branch related liabilities held for sale:
Total other branch related liabilities held for sale	[1]	152,000,000		152,000,000	0
Reduction to the provision for credit losses		22,000,000
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Other branch related liabilities held for sale:
Lower of amortized cost or fair value adjustment			$ 0
Reduction to the provision for credit losses			101,000,000
Credit cards
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale			1,100,000,000
Commercial loans:
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		461,000,000		461,000,000	129,000,000
Commercial loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		79,000,000	149,000,000	79,000,000
Other branch related liabilities held for sale:
Lower of amortized cost or fair value adjustment			0
Reduction to the provision for credit losses			0
Consumer loans:
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		3,756,000,000		3,756,000,000	208,000,000
Other branch related liabilities held for sale:
Reduction to the provision for credit losses		22,000,000
Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		3,681,000,000	3,616,000,000	3,681,000,000
Other branch related liabilities held for sale:
Lower of amortized cost or fair value adjustment			0	7,000,000
Reduction to the provision for credit losses			100,000,000
Consumer loans: | Residential mortgages
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		3,082,000,000		3,082,000,000	208,000,000
Consumer loans: | Residential mortgages | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		3,007,000,000	2,364,000,000	3,007,000,000
Consumer loans: | Home Equity Mortgages
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		275,000,000		275,000,000	0
Consumer loans: | Home Equity Mortgages | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		275,000,000	265,000,000	275,000,000
Consumer loans: | Credit cards
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		195,000,000		195,000,000	0
Consumer loans: | Credit cards | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		195,000,000	829,000,000	195,000,000
Consumer loans: | Other consumer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		204,000,000		204,000,000	$ 0
Consumer loans: | Other consumer | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		204,000,000	$ 158,000,000	204,000,000
Retail Branches Sold
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		2,441,000,000		2,441,000,000
Other branch related assets held for sale:
Lease ROU assets		151,000,000		151,000,000
Properties and equipment, net		40,000,000		40,000,000
Cash and other assets		58,000,000		58,000,000
Total other branch related assets held for sale		249,000,000		249,000,000
Total branch assets held for sale		2,690,000,000		2,690,000,000
Deposits held for sale		8,750,000,000		8,750,000,000
Other branch related liabilities held for sale:
Lease liabilities		144,000,000		144,000,000
Other liabilities		8,000,000		8,000,000
Total other branch related liabilities held for sale		152,000,000		152,000,000
Total branch liabilities held for sale		8,902,000,000		8,902,000,000
Retail Branches Sold | Residential mortgages
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		1,845,000,000		1,845,000,000
Retail Branches Sold | Home Equity Mortgages
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		217,000,000		217,000,000
Retail Branches Sold | Credit cards
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		178,000,000		178,000,000
Retail Branches Sold | Other consumer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		129,000,000		129,000,000
Retail Branches Sold | Commercial loans:
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale		$ 72,000,000		$ 72,000,000
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Trading Assets and Liabilitie_2

Trading Assets and Liabilities - Summary (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Debt and Equity Securities, FV-NI [Line Items]
Trading assets	[1]	$ 24,043	$ 27,284
Trading liabilities	[1]	3,023	5,397
U.S. Treasury
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		2,337	5,145
U.S. Government sponsored enterprises
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		432	192
Asset-backed securities
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		0	143
Foreign bonds
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		167	7,971
Equity securities
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		15,795	6,043
Precious metals
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		3,907	4,989
Trading liabilities		46	2,312
Securities sold, not yet purchased
Debt and Equity Securities, FV-NI [Line Items]
Trading liabilities		1,103	727
Derivatives, net
Debt and Equity Securities, FV-NI [Line Items]
Trading assets		1,405	2,801
Derivatives, net
Debt and Equity Securities, FV-NI [Line Items]
Trading liabilities		$ 1,874	$ 2,358
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Trading Assets and Liabilitie_3

Trading Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt and Equity Securities, FV-NI [Line Items]
Derivatives included in trading assets, amount offset	$ 2,797	$ 4,079
Derivatives included in trading liabilities, amount offset	1,296	3,377
Dividend income on equity securities held for trading	157	78	$ 37
Trading Assets
Debt and Equity Securities, FV-NI [Line Items]
Derivatives included in trading assets, amount offset	1,419	2,763
Trading Liabilities
Debt and Equity Securities, FV-NI [Line Items]
Derivatives included in trading liabilities, amount offset	$ 1,296	$ 3,377

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Asset Backed Securities (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Securities available-for-sale:
Amortized Cost		$ 35,356	$ 39,636
Allowance for Credit Losses		(1)	(1)
Unrealized Gains		305	1,109
Unrealized Losses		(362)	(72)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)	[1]	35,298	40,672
Securities held-to-maturity:
Amortized Cost		5,204	8,983
Allowance for Credit Losses		(1)	(2)
Unrealized Gains		157	388
Unrealized Losses		(1)	0
Fair Value		5,359	9,369
U.S. Treasury
Securities available-for-sale:
Amortized Cost		9,490	16,087
Allowance for Credit Losses		0	0
Unrealized Gains		144	608
Unrealized Losses		(72)	(47)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		9,562	16,648
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Securities available-for-sale:
Amortized Cost		7,365	5,986
Allowance for Credit Losses		0	0
Unrealized Gains		114	280
Unrealized Losses		(115)	(2)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		7,364	6,264
Securities held-to-maturity:
Amortized Cost		684	1,137
Allowance for Credit Losses		0	0
Unrealized Gains		21	44
Unrealized Losses		0	0
Fair Value		705	1,181
Collateralized Mortgage Obligations, Issued by U.S. Government Sponsored Enterprises
Securities available-for-sale:
Amortized Cost		1,787	1,676
Allowance for Credit Losses		0	0
Unrealized Gains		8	19
Unrealized Losses		(48)	(2)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		1,747	1,693
Securities held-to-maturity:
Amortized Cost		492	780
Allowance for Credit Losses		0	0
Unrealized Gains		26	53
Unrealized Losses		0	0
Fair Value		518	833
Direct Agency Obligations U S Government Sponsored Enterprises
Securities available-for-sale:
Amortized Cost		1,775	1,236
Allowance for Credit Losses		0	0
Unrealized Gains		16	17
Unrealized Losses		(4)	0
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		1,787	1,253
Mortgage-backed Securities, Issued or Guaranteed by US Government Agency
Securities available-for-sale:
Amortized Cost		8,489	6,993
Allowance for Credit Losses		0	0
Unrealized Gains		7	152
Unrealized Losses		(66)	0
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		8,430	7,145
Securities held-to-maturity:
Amortized Cost		1,104	1,947
Allowance for Credit Losses		0	0
Unrealized Gains		24	76
Unrealized Losses		0	0
Fair Value		1,128	2,023
Collateralized Mortgage Obligations, Issued or Guaranteed by US Government Agency
Securities available-for-sale:
Amortized Cost		3,730	2,093
Allowance for Credit Losses		0	0
Unrealized Gains		7	22
Unrealized Losses		(49)	(11)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		3,688	2,104
Securities held-to-maturity:
Amortized Cost		2,915	5,107
Allowance for Credit Losses		0	0
Unrealized Gains		85	212
Unrealized Losses		(1)	0
Fair Value		2,999	5,319
Direct Agency Obligations, Issued or Guaranteed by US Government Agency
Securities available-for-sale:
Amortized Cost		282	296
Allowance for Credit Losses		0	0
Unrealized Gains		6	5
Unrealized Losses		0	0
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		288	301
Home equity
Securities available-for-sale:
Amortized Cost		20	28
Allowance for Credit Losses		(1)	(1)
Unrealized Gains		0	0
Unrealized Losses		0	0
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		19	27
Other
Securities available-for-sale:
Amortized Cost		107	114
Allowance for Credit Losses		0	0
Unrealized Gains		0	0
Unrealized Losses		(6)	(10)
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		101	104
Foreign debt securities
Securities available-for-sale:
Amortized Cost		2,311	5,127
Allowance for Credit Losses		0	0
Unrealized Gains		3	6
Unrealized Losses		(2)	0
Securities available-for-sale (includes amortized cost of $35.4 billion and $39.6 billion at December 31, 2021 and 2020, respectively, an allowance for credit losses of $1 million at both December 31, 2021 and 2020, and $2.4 billion and $2.1 billion pledged to creditors at December 31, 2021 and 2020, respectively)		2,312	5,133
Obligations of U.S. states and political subdivisions
Securities held-to-maturity:
Amortized Cost		8	10
Allowance for Credit Losses		0	0
Unrealized Gains		0	1
Unrealized Losses		0	0
Fair Value		8	11
Asset-backed securities collateralized by residential mortgages
Securities held-to-maturity:
Amortized Cost		1	2
Allowance for Credit Losses		(1)	(2)
Unrealized Gains		1	2
Unrealized Losses		0	0
Fair Value		$ 1	$ 2
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Securities - Additional Informa

Securities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Securities available-for-sale, allowance for credit losses	$ 1,000,000	$ 1,000,000
Securities held-to-maturity, allowance for credit losses	1,000,000	2,000,000
Securities held-to-maturity, nonaccrual	0	0
Equity securities without readily determinable fair values, impairment loss adjustment	3,000,000	2,000,000	$ 0
Financial Asset, Past Due
Debt Securities, Available-for-sale [Line Items]
Securities held-to-maturity, past due	0	0
Other assets:
Debt Securities, Available-for-sale [Line Items]
Federal Home Loan Bank stock	110,000,000	259,000,000
Federal Reserve Bank stock	$ 558,000,000	$ 559,000,000

Securities - Gross unrealized l

Securities - Gross unrealized losses and related fair values (Detail) $ in Millions	Dec. 31, 2021USD ($)security	Dec. 31, 2020USD ($)security
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	141	42
Securities available-for-sale gross unrealized losses one year or less	$ (276)	$ (29)
Securities available-for-sale aggregate fair value of investment one year or less	$ 18,168	$ 3,818
Number of Securities available for sale greater than one year | security	41	31
Securities available-for-sale gross unrealized losses greater than one year	$ (86)	$ (43)
Securities available-for-sale aggregate fair value of investment greater than one year	$ 2,080	$ 1,566
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	11	5
Securities available-for-sale gross unrealized losses one year or less	$ (28)	$ (5)
Securities available-for-sale aggregate fair value of investment one year or less	$ 1,784	$ 751
Number of Securities available for sale greater than one year | security	9	13
Securities available-for-sale gross unrealized losses greater than one year	$ (44)	$ (42)
Securities available-for-sale aggregate fair value of investment greater than one year	$ 856	$ 1,271
U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	63	15
Securities available-for-sale gross unrealized losses one year or less	$ (155)	$ (3)
Securities available-for-sale aggregate fair value of investment one year or less	$ 6,224	$ 715
Number of Securities available for sale greater than one year | security	14	8
Securities available-for-sale gross unrealized losses greater than one year	$ (12)	$ (1)
Securities available-for-sale aggregate fair value of investment greater than one year	$ 354	$ 46
U.S. Government agency issued or guaranteed
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	59	13
Securities available-for-sale gross unrealized losses one year or less	$ (91)	$ (11)
Securities available-for-sale aggregate fair value of investment one year or less	$ 8,972	$ 1,482
Number of Securities available for sale greater than one year | security	15	3
Securities available-for-sale gross unrealized losses greater than one year	$ (24)	$ 0
Securities available-for-sale aggregate fair value of investment greater than one year	$ 769	$ 8
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	0	3
Securities available-for-sale gross unrealized losses one year or less	$ 0	$ (10)
Securities available-for-sale aggregate fair value of investment one year or less	$ 0	$ 104
Number of Securities available for sale greater than one year | security	3	2
Securities available-for-sale gross unrealized losses greater than one year	$ (6)	$ 0
Securities available-for-sale aggregate fair value of investment greater than one year	$ 101	$ 0
Foreign debt securities
Debt Securities, Available-for-sale [Line Items]
Number of securities available for sale in one year or less | security	8	6
Securities available-for-sale gross unrealized losses one year or less	$ (2)	$ 0
Securities available-for-sale aggregate fair value of investment one year or less	$ 1,188	$ 766
Number of Securities available for sale greater than one year | security	0	5
Securities available-for-sale gross unrealized losses greater than one year	$ 0	$ 0
Securities available-for-sale aggregate fair value of investment greater than one year	$ 0	$ 241

Securities - Realized gains and

Securities - Realized gains and losses on investment securities Transactions Attributable to available-for-sale securities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 159	$ 174	$ 148
Gross realized losses	(86)	(37)	(60)
Net realized gains	$ 73	$ 137	$ 88

Securities - Distribution of ma

Securities - Distribution of maturities of debt securities with approximate yield of portfolio (Detail) $ in Millions	Dec. 31, 2021USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 1,439
Available-for-sale yield within one year (percent)	0.43%
Available-for-sale amount after one but within five years	$ 6,288
Available-for-sale yield after one but within five years (percent)	1.30%
Available-for-sale amount after five but within ten years	$ 4,262
Available-for-sale yield after five but within ten years (percent)	1.93%
Available-for-sale amount after ten years	$ 23,367
Available-for-sale yield after ten years (percent)	1.78%
Total fair value within one year	$ 1,442
Total fair value after one but within five years	6,340
Total fair value after five but within ten years	4,346
Total fair value after ten years	23,170
Held-to-maturity amount within one year	$ 7
Held-to-maturity yield within one year (percent)	3.33%
Held-to-maturity amount after one but within five years	$ 182
Held-to-maturity yield after one but within five years (percent)	2.65%
Held-to-maturity after five but within ten years	$ 309
Held-to-maturity yield after five but within ten years (percent)	2.36%
Held-to-maturity after ten years	$ 4,706
Held-to-maturity yield after ten years (percent)	2.66%
Total fair value within one year	$ 8
Total fair value after one but within five years	184
Total fair value after five but within ten years	318
Total fair value after ten years	4,849
U.S. Treasury
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 246
Available-for-sale yield within one year (percent)	1.99%
Available-for-sale amount after one but within five years	$ 3,364
Available-for-sale yield after one but within five years (percent)	1.38%
Available-for-sale amount after five but within ten years	$ 2,075
Available-for-sale yield after five but within ten years (percent)	1.39%
Available-for-sale amount after ten years	$ 3,805
Available-for-sale yield after ten years (percent)	1.87%
U.S. Government sponsored enterprises
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 0
Available-for-sale yield within one year (percent)	0.00%
Available-for-sale amount after one but within five years	$ 1,712
Available-for-sale yield after one but within five years (percent)	1.63%
Available-for-sale amount after five but within ten years	$ 2,079
Available-for-sale yield after five but within ten years (percent)	2.35%
Available-for-sale amount after ten years	$ 7,136
Available-for-sale yield after ten years (percent)	1.64%
Held-to-maturity amount within one year	$ 3
Held-to-maturity yield within one year (percent)	2.69%
Held-to-maturity amount after one but within five years	$ 179
Held-to-maturity yield after one but within five years (percent)	2.64%
Held-to-maturity after five but within ten years	$ 299
Held-to-maturity yield after five but within ten years (percent)	2.26%
Held-to-maturity after ten years	$ 695
Held-to-maturity yield after ten years (percent)	3.31%
U.S. Government agency issued or guaranteed
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 71
Available-for-sale yield within one year (percent)	0.24%
Available-for-sale amount after one but within five years	$ 23
Available-for-sale yield after one but within five years (percent)	1.17%
Available-for-sale amount after five but within ten years	$ 1
Available-for-sale yield after five but within ten years (percent)	5.54%
Available-for-sale amount after ten years	$ 12,406
Available-for-sale yield after ten years (percent)	1.83%
Held-to-maturity amount within one year	$ 1
Held-to-maturity yield within one year (percent)	3.51%
Held-to-maturity amount after one but within five years	$ 0
Held-to-maturity yield after one but within five years (percent)	0.00%
Held-to-maturity after five but within ten years	$ 8
Held-to-maturity yield after five but within ten years (percent)	5.38%
Held-to-maturity after ten years	$ 4,010
Held-to-maturity yield after ten years (percent)	2.55%
Obligations of U.S. states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Held-to-maturity amount within one year	$ 3
Held-to-maturity yield within one year (percent)	3.92%
Held-to-maturity amount after one but within five years	$ 3
Held-to-maturity yield after one but within five years (percent)	2.68%
Held-to-maturity after five but within ten years	$ 2
Held-to-maturity yield after five but within ten years (percent)	4.32%
Held-to-maturity after ten years	$ 0
Held-to-maturity yield after ten years (percent)	0.00%
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 0
Available-for-sale yield within one year (percent)	0.00%
Available-for-sale amount after one but within five years	$ 0
Available-for-sale yield after one but within five years (percent)	0.00%
Available-for-sale amount after five but within ten years	$ 107
Available-for-sale yield after five but within ten years (percent)	4.14%
Available-for-sale amount after ten years	$ 20
Available-for-sale yield after ten years (percent)	0.23%
Held-to-maturity amount within one year	$ 0
Held-to-maturity yield within one year (percent)	0.00%
Held-to-maturity amount after one but within five years	$ 0
Held-to-maturity yield after one but within five years (percent)	0.00%
Held-to-maturity after five but within ten years	$ 0
Held-to-maturity yield after five but within ten years (percent)	0.00%
Held-to-maturity after ten years	$ 1
Held-to-maturity yield after ten years (percent)	7.52%
Foreign debt securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale amount within one year	$ 1,122
Available-for-sale yield within one year (percent)	0.10%
Available-for-sale amount after one but within five years	$ 1,189
Available-for-sale yield after one but within five years (percent)	0.57%
Available-for-sale amount after five but within ten years	$ 0
Available-for-sale yield after five but within ten years (percent)	0.00%
Available-for-sale amount after ten years	$ 0
Available-for-sale yield after ten years (percent)	0.00%

Securities - Equity securities

Securities - Equity securities that are not classified as trading (Details) - Other assets: - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Equity securities carried at fair value	$ 282	$ 284
Equity securities without readily determinable fair values	$ 16	$ 14

Loans - Components of Loans (De

Loans - Components of Loans (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	[1]	$ 55,864	$ 62,088
Loans, designated under fair value option		0	32
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		39,796	41,599
Commercial loans: | Real Estate, including Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		8,234	10,464
Commercial loans: | Business and corporate banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		13,958	13,479
Loans funded under the Payroll Protection Program		262	1,043
Commercial loans: | Global banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		11,109	13,519
Commercial loans: | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		6,495	4,137
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		16,068	20,489
Consumer loans: | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		15,469	18,377
Consumer loans: | Home equity mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		325	727
Consumer loans: | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		204	1,066
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		70	319
Consumer loans: | Student Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, designated under fair value option		25	32
Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,793	1,100
Affiliated Entity | Commercial loans: | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,793	1,100
Other [Member] | Commercial loans: | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 3,702	$ 3,037
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Additional Information

Loans - Additional Information (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net deferred origination costs (fees)		$ 40,000,000	$ 57,000,000
Net unamortized premium (discount)		5,000,000	9,000,000
Interest income that was recorded on nonaccrual loans and included in interest income during the period		34,000,000	12,000,000	$ 15,000,000
Commercial loans removed from TDR classification		0	0	$ 12,000,000
Loans	[1]	55,864,000,000	62,088,000,000
Interest only residential mortgage loans		$ 3,739,000,000	$ 3,597,000,000
Affiliated Entity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Executive loans as percent of total equity, maximum (in percent)		5.00%	5.00%
Payment Deferral | COVID-19
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 76,000,000
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 16,068,000,000	$ 20,489,000,000
Weighted average rate of reduction		2.08%	1.75%	2.18%
Loans which were classified as TDR loans during previous 12 months which became contractually delinquent		$ 5,000,000	$ 5,000,000	$ 3,000,000
Threshold period for troubled debt restructuring status		60 days	60 days	60 days
Consumer loans: | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral-dependent loans		$ 214,000,000	$ 817,000,000
Loans		15,469,000,000	18,377,000,000
Loans which were classified as TDR loans during previous 12 months which became contractually delinquent		5,000,000	5,000,000	$ 3,000,000
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral-dependent loans		347,000,000	456,000,000
Loans		39,796,000,000	41,599,000,000
Loans which were classified as TDR loans during previous 12 months which became contractually delinquent		$ 0	$ 0	$ 0
Threshold period for troubled debt restructuring status		90 days	90 days	90 days
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Summary of Past Due Sta

Loans - Summary of Past Due Status of Loans (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	[1]	$ 55,864	$ 62,088
Commercial loans:
Financing Receivable, Past Due [Line Items]
Loans		39,796	41,599
Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Loans		8,234	10,464
Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Loans		13,958	13,479
Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Loans		11,109	13,519
Commercial loans: | Other commercial
Financing Receivable, Past Due [Line Items]
Loans		6,495	4,137
Consumer loans:
Financing Receivable, Past Due [Line Items]
Loans		16,068	20,489
Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Loans		15,469	18,377
Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Loans		325	727
Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Loans		204	1,066
Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Loans		70	319
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans		453	1,141
Financial Asset, Past Due | Commercial loans:
Financing Receivable, Past Due [Line Items]
Loans		241	307
Financial Asset, Past Due | Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Loans		38	78
Financial Asset, Past Due | Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Loans		129	145
Financial Asset, Past Due | Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Loans		27	60
Financial Asset, Past Due | Commercial loans: | Other commercial
Financing Receivable, Past Due [Line Items]
Loans		47	24
Financial Asset, Past Due | Consumer loans:
Financing Receivable, Past Due [Line Items]
Loans		212	834
Financial Asset, Past Due | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Loans held for sale
Financing Receivable, Past Due [Line Items]
Loans		419
Financial Asset, Past Due | Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Loans		201	746
Financial Asset, Past Due | Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Loans		3	33
Financial Asset, Past Due | Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Loans		7	42
Financial Asset, Past Due | Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Loans		1	13
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans		343	704
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial loans:
Financing Receivable, Past Due [Line Items]
Loans		197	228
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Loans		38	78
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Loans		112	126
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Loans		0	0
Financing Receivables, 30 to 89 Days Past Due [Member] | Commercial loans: | Other commercial
Financing Receivable, Past Due [Line Items]
Loans		47	24
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer loans:
Financing Receivable, Past Due [Line Items]
Loans		146	476
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Loans		138	435
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Loans		2	11
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Loans		5	23
Financing Receivables, 30 to 89 Days Past Due [Member] | Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Loans		1	7
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans		110	437
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial loans:
Financing Receivable, Past Due [Line Items]
Loans		44	79
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Loans		0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Loans		17	19
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Loans		27	60
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial loans: | Other commercial
Financing Receivable, Past Due [Line Items]
Loans		0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer loans:
Financing Receivable, Past Due [Line Items]
Loans		66	358
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Loans		63	311
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Loans		1	22
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Loans		2	19
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Loans		0	6
Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans		55,411	60,947
Financial Asset, Not Past Due [Member] | Commercial loans:
Financing Receivable, Past Due [Line Items]
Loans		39,555	41,292
Financial Asset, Not Past Due [Member] | Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Loans		8,196	10,386
Financial Asset, Not Past Due [Member] | Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Loans		13,829	13,334
Financial Asset, Not Past Due [Member] | Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Loans		11,082	13,459
Financial Asset, Not Past Due [Member] | Commercial loans: | Other commercial
Financing Receivable, Past Due [Line Items]
Loans		6,448	4,113
Financial Asset, Not Past Due [Member] | Consumer loans:
Financing Receivable, Past Due [Line Items]
Loans		15,856	19,655
Financial Asset, Not Past Due [Member] | Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Loans		15,268	17,631
Financial Asset, Not Past Due [Member] | Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Loans		322	694
Financial Asset, Not Past Due [Member] | Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Loans		197	1,024
Financial Asset, Not Past Due [Member] | Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Loans		$ 69	$ 306
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Contractual Maturities

Loans - Contractual Maturities (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		$ 23,816
2023 - 2026		15,804
2027 - 2036		1,677
Thereafter		14,567
Total	[1]	55,864	$ 62,088
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		39,796	41,599
Commercial loans: | Real Estate, including Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		4,843
2023 - 2026		3,183
2027 - 2036		202
Thereafter		6
Total		8,234	10,464
Commercial loans: | Business and corporate banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		8,211
2023 - 2026		5,395
2027 - 2036		342
Thereafter		10
Total		13,958	13,479
Commercial loans: | Global banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		6,535
2023 - 2026		4,294
2027 - 2036		272
Thereafter		8
Total		11,109	13,519
Commercial loans: | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		3,821
2023 - 2026		2,511
2027 - 2036		159
Thereafter		4
Total		6,495	4,137
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total		16,068	20,489
Consumer loans: | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		223
2023 - 2026		57
2027 - 2036		667
Thereafter		14,522
Total		15,469	18,377
Consumer loans: | Home equity mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		118
2023 - 2026		157
2027 - 2036		33
Thereafter		17
Total		325	727
Consumer loans: | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		0
2023 - 2026		204
2027 - 2036		0
Thereafter		0
Total		204	1,066
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
2022		65
2023 - 2026		3
2027 - 2036		2
Thereafter		0
Total		$ 70	$ 319
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Contractual Maturity of

Loans - Contractual Maturity of Loans Outstanding by Repricing Characteristic (Details) $ in Millions	Dec. 31, 2021USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	$ 6,390
Receivables at Floating or Adjustable Rates	25,658
Total Loans Due After One Year	32,048
Commercial loans: | Real Estate, including Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	240
Receivables at Floating or Adjustable Rates	3,151
Total Loans Due After One Year	3,391
Commercial loans: | Business and corporate banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	407
Receivables at Floating or Adjustable Rates	5,340
Total Loans Due After One Year	5,747
Commercial loans: | Global banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	324
Receivables at Floating or Adjustable Rates	4,250
Total Loans Due After One Year	4,574
Commercial loans: | Other commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	189
Receivables at Floating or Adjustable Rates	2,485
Total Loans Due After One Year	2,674
Consumer loans: | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	5,181
Receivables at Floating or Adjustable Rates	10,065
Total Loans Due After One Year	15,246
Consumer loans: | Home equity mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	23
Receivables at Floating or Adjustable Rates	184
Total Loans Due After One Year	207
Consumer loans: | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	26
Receivables at Floating or Adjustable Rates	178
Total Loans Due After One Year	204
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receivables at Predetermined Interest Rates	0
Receivables at Floating or Adjustable Rates	5
Total Loans Due After One Year	$ 5

Loans - Summary of Nonaccrual L

Loans - Summary of Nonaccrual Loans and Accruing Receivables 90 Days or More Delinquent (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 617	$ 1,686
Accruing Loans Contractually Past Due 90 Days or More	3	21
Nonaccrual Loans With No Allowance For Credit Losses	211	400
Residential mortgage loans carried at lower of cost or fair value of the collateral less cost to sell	86	375
Commercial loans:
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	379	544
Accruing Loans Contractually Past Due 90 Days or More	1	0
Nonaccrual Loans With No Allowance For Credit Losses	152	125
Commercial loans: | Real Estate, including Construction
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	140	44
Accruing Loans Contractually Past Due 90 Days or More	0	0
Nonaccrual Loans With No Allowance For Credit Losses	20	31
Commercial loans: | Business and corporate banking
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	134	163
Accruing Loans Contractually Past Due 90 Days or More	1	0
Nonaccrual Loans With No Allowance For Credit Losses	69	1
Commercial loans: | Global banking
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	105	337
Accruing Loans Contractually Past Due 90 Days or More	0	0
Nonaccrual Loans With No Allowance For Credit Losses	63	93
Consumer loans:
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	238	1,142
Accruing Loans Contractually Past Due 90 Days or More	2	21
Nonaccrual Loans With No Allowance For Credit Losses	59	275
Consumer loans: | Loans held for sale | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	698
Accruing Loans Contractually Past Due 90 Days or More	21
Consumer loans: | Residential mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	229	1,079
Accruing Loans Contractually Past Due 90 Days or More	0	0
Nonaccrual Loans With No Allowance For Credit Losses	55	241
Consumer loans: | Home equity mortgages
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	9	63
Accruing Loans Contractually Past Due 90 Days or More	0	0
Nonaccrual Loans With No Allowance For Credit Losses	4	34
Consumer loans: | Credit cards
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	0
Accruing Loans Contractually Past Due 90 Days or More	2	19
Nonaccrual Loans With No Allowance For Credit Losses	0	0
Consumer loans: | Other consumer
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	0	0
Accruing Loans Contractually Past Due 90 Days or More	0	2
Nonaccrual Loans With No Allowance For Credit Losses	0	0
Consumer loans: | Mortgage Loans Under Covid-19 Payment Deferral | Cares Act Election
Financing Receivable, Past Due [Line Items]
Nonaccrual Loans	$ 12	$ 590

Loans - Summary of TDRs (Detail

Loans - Summary of TDRs (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	$ 200	$ 786
Residential mortgage loan TDR carried at lower of amortized cost or fair value less cost to sell	104	487
Non Accrual loans included in TDR loan	115	463
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	63	168
Additional commitments to lend to commercial borrowers with modified TDRs	13	107
Commercial loans: | Cares Act Election
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans excluded from TDR classification	42	924
Commercial loans: | Business and corporate banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	38	94
Commercial loans: | Global banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	25	74
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	137	618
Consumer loans: | Loans held for sale | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	416
Consumer loans: | Residential mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	125	582
Consumer loans: | Home equity mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	9	31
Consumer loans: | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDR Loans	3	5
Consumer loans: | Mortgage Loans Under Covid-19 Payment Deferral | Cares Act Election
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans excluded from TDR classification	$ 16	$ 736

Loans - Summary of Receivables

Loans - Summary of Receivables which were Modified and as Result Became Classified as TDR Loans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	$ 65	$ 224	$ 12
Commercial loans:
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	26	139	0
Commercial loans: | Business and corporate banking
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	11	95	0
Commercial loans: | Global banking
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	15	44	0
Consumer loans:
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	39	85	12
Consumer loans: | Residential mortgages
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	36	78	8
Consumer loans: | Home equity mortgages
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	1	3	1
Consumer loans: | Credit cards
Financing Receivable, Impaired [Line Items]
Loans which were modified and as a result became classified as TDR Loans	$ 2	$ 4	$ 3

Loans - Loans Classified as TDR

Loans - Loans Classified as TDR Loans (Detail) - Consumer loans: - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans which were classified as TDR loans during previous 12 months which became contractually delinquent	$ 5	$ 5	$ 3
Residential mortgages
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans which were classified as TDR loans during previous 12 months which became contractually delinquent	$ 5	$ 5	$ 3

Loans - Summary of Criticized A

Loans - Summary of Criticized Assets for Commercial Loans (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 55,864	$ 62,088
Commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2021		3,735	2,510
2020		2,458	5,322
2019		3,778	3,469
2018		2,590	2,039
2017		1,184	639
Prior		11,747	11,882
Revolving Loans		14,071	15,396
Revolving Loans Converted to Term Loans		233	342
Total		39,796	41,599
Commercial loans: | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		969	545
2020		653	3,775
2019		2,516	2,799
2018		2,116	1,368
2017		593	264
Prior		1,325	1,614
Revolving Loans		46	79
Revolving Loans Converted to Term Loans		16	20
Total		8,234	10,464
Commercial loans: | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,630	1,080
2020		713	621
2019		608	265
2018		220	335
2017		238	152
Prior		4,757	3,488
Revolving Loans		5,575	7,216
Revolving Loans Converted to Term Loans		217	322
Total		13,958	13,479
Commercial loans: | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		547	507
2020		540	495
2019		203	190
2018		80	231
2017		243	104
Prior		4,620	6,150
Revolving Loans		4,876	5,842
Revolving Loans Converted to Term Loans		0	0
Total		11,109	13,519
Commercial loans: | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		589	378
2020		552	431
2019		451	215
2018		174	105
2017		110	119
Prior		1,045	630
Revolving Loans		3,574	2,259
Revolving Loans Converted to Term Loans		0	0
Total		6,495	4,137
Commercial loans: | Criticized
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	18
2020		20	607
2019		829	231
2018		841	395
2017		427	126
Prior		1,370	1,604
Revolving Loans		983	1,867
Revolving Loans Converted to Term Loans		19	49
Total		4,497	4,897
Commercial loans: | Criticized | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		1	492
2019		702	115
2018		752	340
2017		398	85
Prior		773	523
Revolving Loans		20	0
Revolving Loans Converted to Term Loans		11	0
Total		2,657	1,555
Commercial loans: | Criticized | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	18
2020		19	115
2019		127	68
2018		89	55
2017		29	41
Prior		528	612
Revolving Loans		613	1,092
Revolving Loans Converted to Term Loans		8	49
Total		1,413	2,050
Commercial loans: | Criticized | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	0
2020		0	0
2019		0	48
2018		0	0
2017		0	0
Prior		62	355
Revolving Loans		310	735
Revolving Loans Converted to Term Loans		0	0
Total		380	1,138
Commercial loans: | Criticized | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		7	114
Revolving Loans		40	40
Revolving Loans Converted to Term Loans		0	0
Total		47	154
Commercial loans: | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	17
2020		1	377
2019		441	158
2018		547	203
2017		116	95
Prior		548	1,013
Revolving Loans		220	738
Revolving Loans Converted to Term Loans		0	48
Total		1,881	2,649
Commercial loans: | Special mention | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	306
2019		350	115
2018		487	171
2017		90	85
Prior		259	437
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		1,186	1,114
Commercial loans: | Special mention | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	17
2020		1	71
2019		91	43
2018		60	32
2017		26	10
Prior		274	390
Revolving Loans		173	600
Revolving Loans Converted to Term Loans		0	48
Total		625	1,211
Commercial loans: | Special mention | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		8	142
Revolving Loans		47	98
Revolving Loans Converted to Term Loans		0	0
Total		63	240
Commercial loans: | Special mention | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		7	44
Revolving Loans		0	40
Revolving Loans Converted to Term Loans		0	0
Total		7	84
Commercial loans: | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	1
2020		19	230
2019		308	73
2018		272	192
2017		311	31
Prior		741	468
Revolving Loans		716	912
Revolving Loans Converted to Term Loans		19	1
Total		2,386	1,908
Commercial loans: | Substandard | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		1	186
2019		272	0
2018		263	169
2017		308	0
Prior		461	86
Revolving Loans		20	0
Revolving Loans Converted to Term Loans		11	0
Total		1,336	441
Commercial loans: | Substandard | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	1
2020		18	44
2019		36	25
2018		9	23
2017		3	31
Prior		226	181
Revolving Loans		424	435
Revolving Loans Converted to Term Loans		8	1
Total		724	741
Commercial loans: | Substandard | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	48
2018		0	0
2017		0	0
Prior		54	131
Revolving Loans		232	477
Revolving Loans Converted to Term Loans		0	0
Total		286	656
Commercial loans: | Substandard | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	70
Revolving Loans		40	0
Revolving Loans Converted to Term Loans		0	0
Total		40	70
Commercial loans: | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		80	0
2018		22	0
2017		0	0
Prior		81	123
Revolving Loans		47	217
Revolving Loans Converted to Term Loans		0	0
Total		230	340
Commercial loans: | Doubtful | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		80	0
2018		2	0
2017		0	0
Prior		53	0
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		135	0
Commercial loans: | Doubtful | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		20	0
2017		0	0
Prior		28	41
Revolving Loans		16	57
Revolving Loans Converted to Term Loans		0	0
Total		64	98
Commercial loans: | Doubtful | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	82
Revolving Loans		31	160
Revolving Loans Converted to Term Loans		0	0
Total		31	242
Commercial loans: | Doubtful | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		$ 0	$ 0
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Status of Loan Portfoli

Loans - Status of Loan Portfolios (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 55,864	$ 62,088
Commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2021		3,735	2,510
2020		2,458	5,322
2019		3,778	3,469
2018		2,590	2,039
2017		1,184	639
Prior		11,747	11,882
Revolving Loans		14,071	15,396
Revolving Loans Converted to Term Loans		233	342
Total		39,796	41,599
Commercial loans: | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		969	545
2020		653	3,775
2019		2,516	2,799
2018		2,116	1,368
2017		593	264
Prior		1,325	1,614
Revolving Loans		46	79
Revolving Loans Converted to Term Loans		16	20
Total		8,234	10,464
Commercial loans: | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,630	1,080
2020		713	621
2019		608	265
2018		220	335
2017		238	152
Prior		4,757	3,488
Revolving Loans		5,575	7,216
Revolving Loans Converted to Term Loans		217	322
Total		13,958	13,479
Commercial loans: | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		547	507
2020		540	495
2019		203	190
2018		80	231
2017		243	104
Prior		4,620	6,150
Revolving Loans		4,876	5,842
Revolving Loans Converted to Term Loans		0	0
Total		11,109	13,519
Commercial loans: | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		589	378
2020		552	431
2019		451	215
2018		174	105
2017		110	119
Prior		1,045	630
Revolving Loans		3,574	2,259
Revolving Loans Converted to Term Loans		0	0
Total		6,495	4,137
Commercial loans: | Performing loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021		3,735	2,509
2020		2,452	5,307
2019		3,684	3,433
2018		2,520	1,979
2017		1,133	638
Prior		11,688	11,732
Revolving Loans		13,971	15,115
Revolving Loans Converted to Term Loans		233	342
Total		39,416	41,055
Commercial loans: | Performing loans | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		969	545
2020		651	3,775
2019		2,436	2,775
2018		2,076	1,368
2017		593	264
Prior		1,307	1,594
Revolving Loans		46	79
Revolving Loans Converted to Term Loans		16	20
Total		8,094	10,420
Commercial loans: | Performing loans | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,630	1,079
2020		709	606
2019		594	253
2018		190	275
2017		187	151
Prior		4,756	3,485
Revolving Loans		5,540	7,145
Revolving Loans Converted to Term Loans		217	322
Total		13,823	13,316
Commercial loans: | Performing loans | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		547	507
2020		540	495
2019		203	190
2018		80	231
2017		243	104
Prior		4,580	6,023
Revolving Loans		4,811	5,632
Revolving Loans Converted to Term Loans		0	0
Total		11,004	13,182
Commercial loans: | Performing loans | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		589	378
2020		552	431
2019		451	215
2018		174	105
2017		110	119
Prior		1,045	630
Revolving Loans		3,574	2,259
Revolving Loans Converted to Term Loans		0	0
Total		6,495	4,137
Commercial loans: | Nonaccrual loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	1
2020		6	15
2019		94	36
2018		70	60
2017		51	1
Prior		59	150
Revolving Loans		99	281
Revolving Loans Converted to Term Loans		0	0
Total		379	544
Commercial loans: | Nonaccrual loans | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		2	0
2019		80	24
2018		40	0
2017		0	0
Prior		18	20
Revolving Loans		0	0
Revolving Loans Converted to Term Loans		0	0
Total		140	44
Commercial loans: | Nonaccrual loans | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	1
2020		4	15
2019		14	12
2018		30	60
2017		51	1
Prior		1	3
Revolving Loans		34	71
Revolving Loans Converted to Term Loans		0	0
Total		134	163
Commercial loans: | Nonaccrual loans | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		40	127
Revolving Loans		65	210
Revolving Loans Converted to Term Loans		0	0
Total		105	337
Commercial loans: | Accruing loans contractually past due 90 days or more
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0
2020		0
2019		0
2018		0
2017		0
Prior		0
Revolving Loans		1
Revolving Loans Converted to Term Loans		0
Total		1
Commercial loans: | Accruing loans contractually past due 90 days or more | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0
2020		0
2019		0
2018		0
2017		0
Prior		0
Revolving Loans		1
Revolving Loans Converted to Term Loans		0
Total		1
Consumer loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,521	4,666
2020		3,343	2,566
2019		1,531	1,465
2018		891	1,694
2017		987	1,985
Prior		4,589	6,991
Revolving Loans		206	1,122
Total		16,068	20,489
Consumer loans: | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,498	4,529
2020		3,305	2,476
2019		1,496	1,431
2018		872	1,658
2017		969	1,930
Prior		4,329	6,353
Revolving Loans		0	0
Total		15,469	18,377
Consumer loans: | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		15	50
2020		30	51
2019		30	34
2018		18	35
2017		17	47
Prior		215	510
Revolving Loans		0	0
Total		325	727
Consumer loans: | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		204	1,066
Total		204	1,066
Consumer loans: | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	87
2020		8	39
2019		5	0
2018		1	1
2017		1	8
Prior		45	128
Revolving Loans		2	56
Total		70	319
Consumer loans: | Performing loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,519	4,628
2020		3,334	2,459
2019		1,516	1,371
2018		870	1,607
2017		973	1,905
Prior		4,412	6,255
Revolving Loans		204	1,101
Total		15,828	19,326
Consumer loans: | Performing loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,496	4,491
2020		3,296	2,369
2019		1,481	1,338
2018		851	1,572
2017		955	1,852
Prior		4,161	5,676
Revolving Loans		0	0
Total		15,240	17,298
Consumer loans: | Performing loans | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		15	50
2020		30	51
2019		30	33
2018		18	34
2017		17	45
Prior		206	451
Revolving Loans		0	0
Total		316	664
Consumer loans: | Performing loans | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		202	1,047
Total		202	1,047
Consumer loans: | Performing loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	87
2020		8	39
2019		5	0
2018		1	1
2017		1	8
Prior		45	128
Revolving Loans		2	54
Total		70	317
Consumer loans: | Nonaccrual loans
Financing Receivable, Credit Quality Indicator [Line Items]
2021		2	38
2020		9	107
2019		15	94
2018		21	87
2017		14	80
Prior		177	736
Revolving Loans		0	0
Total		238	1,142
Consumer loans: | Nonaccrual loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		2	38
2020		9	107
2019		15	93
2018		21	86
2017		14	78
Prior		168	677
Revolving Loans		0	0
Total		229	1,079
Consumer loans: | Nonaccrual loans | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	1
2018		0	1
2017		0	2
Prior		9	59
Revolving Loans		0	0
Total		9	63
Consumer loans: | Accruing loans contractually past due 90 days or more
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		2	21
Total		2	21
Consumer loans: | Accruing loans contractually past due 90 days or more | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		2	19
Total		$ 2	19
Consumer loans: | Accruing loans contractually past due 90 days or more | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021			0
2020			0
2019			0
2018			0
2017			0
Prior			0
Revolving Loans			2
Total			$ 2
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Credit Risk Profile of

Loans - Credit Risk Profile of Commercial Loans (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 55,864	$ 62,088
Commercial loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2021		3,735	2,510
2020		2,458	5,322
2019		3,778	3,469
2018		2,590	2,039
2017		1,184	639
Prior		11,747	11,882
Revolving Loans		14,071	15,396
Revolving Loans Converted to Term Loans		233	342
Total		39,796	41,599
Commercial loans: | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		969	545
2020		653	3,775
2019		2,516	2,799
2018		2,116	1,368
2017		593	264
Prior		1,325	1,614
Revolving Loans		46	79
Revolving Loans Converted to Term Loans		16	20
Total		8,234	10,464
Commercial loans: | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,630	1,080
2020		713	621
2019		608	265
2018		220	335
2017		238	152
Prior		4,757	3,488
Revolving Loans		5,575	7,216
Revolving Loans Converted to Term Loans		217	322
Total		13,958	13,479
Commercial loans: | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		547	507
2020		540	495
2019		203	190
2018		80	231
2017		243	104
Prior		4,620	6,150
Revolving Loans		4,876	5,842
Revolving Loans Converted to Term Loans		0	0
Total		11,109	13,519
Commercial loans: | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		589	378
2020		552	431
2019		451	215
2018		174	105
2017		110	119
Prior		1,045	630
Revolving Loans		3,574	2,259
Revolving Loans Converted to Term Loans		0	0
Total		6,495	4,137
Commercial loans: | Investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,532	1,517
2020		1,596	1,910
2019		1,073	1,017
2018		1,062	688
2017		404	348
Prior		7,223	7,269
Revolving Loans		10,277	8,718
Revolving Loans Converted to Term Loans		55	47
Total		23,222	21,514
Commercial loans: | Investment grade | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1	339
2020		361	1,123
2019		491	817
2018		772	318
2017		57	179
Prior		248	640
Revolving Loans		12	6
Revolving Loans Converted to Term Loans		0	0
Total		1,942	3,422
Commercial loans: | Investment grade | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		881	342
2020		254	147
2019		240	37
2018		52	34
2017		43	23
Prior		2,122	1,486
Revolving Loans		2,498	2,499
Revolving Loans Converted to Term Loans		55	47
Total		6,145	4,615
Commercial loans: | Investment grade | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		530	464
2020		539	477
2019		189	46
2018		64	231
2017		235	30
Prior		3,910	4,618
Revolving Loans		4,240	4,281
Revolving Loans Converted to Term Loans		0	0
Total		9,707	10,147
Commercial loans: | Investment grade | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		120	372
2020		442	163
2019		153	117
2018		174	105
2017		69	116
Prior		943	525
Revolving Loans		3,527	1,932
Revolving Loans Converted to Term Loans		0	0
Total		5,428	3,330
Commercial loans: | Non-investment grade
Financing Receivable, Credit Quality Indicator [Line Items]
2021		2,203	993
2020		862	3,412
2019		2,705	2,452
2018		1,528	1,351
2017		780	291
Prior		4,524	4,613
Revolving Loans		3,794	6,678
Revolving Loans Converted to Term Loans		178	295
Total		16,574	20,085
Commercial loans: | Non-investment grade | Real Estate, including Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2021		968	206
2020		292	2,652
2019		2,025	1,982
2018		1,344	1,050
2017		536	85
Prior		1,077	974
Revolving Loans		34	73
Revolving Loans Converted to Term Loans		16	20
Total		6,292	7,042
Commercial loans: | Non-investment grade | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		749	738
2020		459	474
2019		368	228
2018		168	301
2017		195	129
Prior		2,635	2,002
Revolving Loans		3,077	4,717
Revolving Loans Converted to Term Loans		162	275
Total		7,813	8,864
Commercial loans: | Non-investment grade | Global banking
Financing Receivable, Credit Quality Indicator [Line Items]
2021		17	43
2020		1	18
2019		14	144
2018		16	0
2017		8	74
Prior		710	1,532
Revolving Loans		636	1,561
Revolving Loans Converted to Term Loans		0	0
Total		1,402	3,372
Commercial loans: | Non-investment grade | Other commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2021		469	6
2020		110	268
2019		298	98
2018		0	0
2017		41	3
Prior		102	105
Revolving Loans		47	327
Revolving Loans Converted to Term Loans		0	0
Total		$ 1,067	$ 807
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Delinquency Ratio for C

Loans - Delinquency Ratio for Consumer Loan (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total	[1]	$ 55,864	$ 62,088
Residential Mortgage Loan Delinquency Carried At Lower Of Amortized Cost Or Fair Value Less Cost To Sell		24	281
Consumer loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,521	4,666
2020		3,343	2,566
2019		1,531	1,465
2018		891	1,694
2017		987	1,985
Prior		4,589	6,991
Revolving Loans		206	1,122
Total		16,068	20,489
Mortgage Loans in Process of Foreclosure, Amount		87	109
Consumer loans: | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		4,498	4,529
2020		3,305	2,476
2019		1,496	1,431
2018		872	1,658
2017		969	1,930
Prior		4,329	6,353
Revolving Loans		0	0
Total		15,469	18,377
Consumer loans: | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		15	50
2020		30	51
2019		30	34
2018		18	35
2017		17	47
Prior		215	510
Revolving Loans		0	0
Total		325	727
Consumer loans: | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		204	1,066
Total		204	1,066
Consumer loans: | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021		8	87
2020		8	39
2019		5	0
2018		1	1
2017		1	8
Prior		45	128
Revolving Loans		2	56
Total		70	319
Consumer loans: | Summary of Two Months and Over Contractual Delinquency
Financing Receivable, Credit Quality Indicator [Line Items]
2021		5	4
2020		2	16
2019		11	13
2018		13	25
2017		8	19
Prior		65	358
Revolving Loans		3	30
Total		107	465
Consumer loans: | Summary of Two Months and Over Contractual Delinquency | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		5	3
2020		2	15
2019		11	13
2018		13	25
2017		8	19
Prior		64	329
Revolving Loans		0	0
Total		103	404
Consumer loans: | Summary of Two Months and Over Contractual Delinquency | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		1	25
Revolving Loans		0	0
Total		1	25
Consumer loans: | Summary of Two Months and Over Contractual Delinquency | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		3	28
Total		3	28
Consumer loans: | Summary of Two Months and Over Contractual Delinquency | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2021		0	1
2020		0	1
2019		0	0
2018		0	0
2017		0	0
Prior		0	4
Revolving Loans		0	2
Total		$ 0	$ 8
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans - Summary of TDRs in Cons

Loans - Summary of TDRs in Consumer Portfolio (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Total	[1]	$ 55,864	$ 62,088
Consumer loans:
Financing Receivable, Impaired [Line Items]
2021		4,521	4,666
2020		3,343	2,566
2019		1,531	1,465
2018		891	1,694
2017		987	1,985
Prior		4,589	6,991
Revolving Loans		206	1,122
Total		16,068	20,489
Consumer loans: | Residential mortgages
Financing Receivable, Impaired [Line Items]
2021		4,498	4,529
2020		3,305	2,476
2019		1,496	1,431
2018		872	1,658
2017		969	1,930
Prior		4,329	6,353
Revolving Loans		0	0
Total		15,469	18,377
Consumer loans: | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2021		15	50
2020		30	51
2019		30	34
2018		18	35
2017		17	47
Prior		215	510
Revolving Loans		0	0
Total		325	727
Consumer loans: | Credit cards
Financing Receivable, Impaired [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		204	1,066
Total		204	1,066
Consumer loans: | Troubled Debt Restructuring
Financing Receivable, Impaired [Line Items]
2021		0	3
2020		1	5
2019		3	6
2018		3	3
2017		0	2
Prior		127	594
Revolving Loans		3	5
Total		137	618
Consumer loans: | Troubled Debt Restructuring | Residential mortgages
Financing Receivable, Impaired [Line Items]
2021		0	3
2020		1	5
2019		3	6
2018		3	3
2017		0	2
Prior		118	563
Revolving Loans		0	0
Total		125	582
Consumer loans: | Troubled Debt Restructuring | Home equity mortgages
Financing Receivable, Impaired [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		9	31
Revolving Loans		0	0
Total		9	31
Consumer loans: | Troubled Debt Restructuring | Credit cards
Financing Receivable, Impaired [Line Items]
2021		0	0
2020		0	0
2019		0	0
2018		0	0
2017		0	0
Prior		0	0
Revolving Loans		3	5
Total		$ 3	$ 5
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Allowance for Credit Losses - N

Allowance for Credit Losses - Narrative (Details) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2021USD ($)scenario	Sep. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)scenario	Dec. 31, 2020USD ($)
Measurement of ECL Measurements [Line Items]
Number of forward-looking economic scenarios | scenario	3			3
Number of updated forward-looking economic scenarios | scenario	4			4
Reduction to the provision for credit losses	$ 22
Increase in allowance for credit losses	$ 14
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Measurement of ECL Measurements [Line Items]
Reduction to the provision for credit losses			$ 101
Reversal or charge-off of allowances for credit losses			157
Commercial loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Measurement of ECL Measurements [Line Items]
Reduction to the provision for credit losses			$ 0
Commercial loans: | Real Estate, including Construction
Measurement of ECL Measurements [Line Items]
Reduction to the provision for credit losses		$ 24
Commercial loans held for sale
Measurement of ECL Measurements [Line Items]
Charge-off of accrued interest receivables				$ 5	$ 7

Allowance for Credit Losses - F

Allowance for Credit Losses - Forecasted Economic Scenarios (Details)	Dec. 31, 2021	Dec. 31, 2020
For the Quarter ended June 30, 2022
Measurement of ECL Measurements [Line Items]
Unemployment rate (percent)	4.30%	5.90%
GDP growth rate (percent)	4.10%	3.10%
For the Quarter ended December 31, 2022
Measurement of ECL Measurements [Line Items]
Unemployment rate (percent)	4.00%	5.40%
GDP growth rate (percent)	2.80%	1.80%

Allowance for Credit Losses - A

Allowance for Credit Losses - Allowance for Credit Losses and Liability for Off-balance Sheet Credit Exposures (Details) - USD ($) $ in Millions	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019	Dec. 31, 2018
Credit Loss [Abstract]
Loans	$ 447	[1]	$ 1,015	[1]	$ 637	$ 541
Securities held-to-maturity	1		2
Other financial assets measured at amortized cost	1		2
Securities available-for-sale	1		1
Total allowance for credit losses	450		1,020
Liability for off-balance sheet credit exposures	$ 103		$ 237		$ 104	$ 96
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Allowance for Credit Losses - S

Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses and Related Loan Balance by Product (Detail) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Dec. 31, 2021		Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2021		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							$ 1,015,000,000	[1]	$ 637,000,000		$ 541,000,000
Provision charged (credited) to income							(437,000,000)		736,000,000		195,000,000
Charge offs							(165,000,000)		(228,000,000)		(125,000,000)
Recoveries							34,000,000		40,000,000		26,000,000
Net (charge offs) recoveries							(131,000,000)		(188,000,000)		(99,000,000)
Allowance for credit losses - end of period	$ 447,000,000	[1]			$ 447,000,000	[1]	447,000,000	[1]	1,015,000,000	[1]	637,000,000
Reduction to the provision for credit losses	22,000,000
Increase in allowance for credit losses	14,000,000
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Allowance for Loan and Lease Losses [Roll Forward]
Reduction to the provision for credit losses				$ 101,000,000
Lower of amortized cost or fair value adjustment				0
Commercial loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Allowance for Loan and Lease Losses [Roll Forward]
Reduction to the provision for credit losses				0
Lower of amortized cost or fair value adjustment				0
Commercial loans: | Real Estate, including Construction
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							145,000,000		153,000,000		116,000,000
Provision charged (credited) to income							(72,000,000)		116,000,000		37,000,000
Charge offs							0		(12,000,000)		0
Recoveries							0		0		0
Net (charge offs) recoveries							0		(12,000,000)		0
Allowance for credit losses - end of period	73,000,000				73,000,000		73,000,000		145,000,000		153,000,000
Reduction to the provision for credit losses			$ 24,000,000
Commercial loans: | Business and corporate banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							375,000,000		239,000,000		219,000,000
Provision charged (credited) to income							(107,000,000)		274,000,000		62,000,000
Charge offs							(29,000,000)		(90,000,000)		(45,000,000)
Recoveries							4,000,000		12,000,000		3,000,000
Net (charge offs) recoveries							(25,000,000)		(78,000,000)		(42,000,000)
Allowance for credit losses - end of period	243,000,000				243,000,000		243,000,000		375,000,000		239,000,000
Commercial loans: | Global banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							287,000,000		106,000,000		108,000,000
Provision charged (credited) to income							(174,000,000)		149,000,000		1,000,000
Charge offs							(13,000,000)		(20,000,000)		(3,000,000)
Recoveries							0		1,000,000		0
Net (charge offs) recoveries							(13,000,000)		(19,000,000)		(3,000,000)
Allowance for credit losses - end of period	100,000,000				100,000,000		100,000,000		287,000,000		106,000,000
Commercial loans: | Other commercial
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							7,000,000		9,000,000		15,000,000
Provision charged (credited) to income							(3,000,000)		2,000,000		(6,000,000)
Charge offs							0		0		0
Recoveries							0		1,000,000		0
Net (charge offs) recoveries							0		1,000,000		0
Allowance for credit losses - end of period	4,000,000				4,000,000		4,000,000		7,000,000		9,000,000
Consumer loans:
Allowance for Loan and Lease Losses [Roll Forward]
Charge offs	(4,000,000)
Reduction to the provision for credit losses	22,000,000
Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Allowance for Loan and Lease Losses [Roll Forward]
Charge offs				(56,000,000)
Reduction to the provision for credit losses				100,000,000
Lower of amortized cost or fair value adjustment				$ 0	7,000,000
Consumer loans: | Residential Mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							(9,000,000)		12,000,000		13,000,000
Provision charged (credited) to income							21,000,000		55,000,000		(3,000,000)
Charge offs							(19,000,000)		(2,000,000)		(8,000,000)
Recoveries							15,000,000		12,000,000		10,000,000
Net (charge offs) recoveries							(4,000,000)		10,000,000		2,000,000
Allowance for credit losses - end of period	8,000,000				8,000,000		8,000,000		(9,000,000)		12,000,000
Consumer loans: | Home equity mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							22,000,000		6,000,000		7,000,000
Provision charged (credited) to income							(18,000,000)		6,000,000		(2,000,000)
Charge offs							(5,000,000)		(3,000,000)		(4,000,000)
Recoveries							6,000,000		6,000,000		5,000,000
Net (charge offs) recoveries							1,000,000		3,000,000		1,000,000
Allowance for credit losses - end of period	5,000,000				5,000,000		5,000,000		22,000,000		6,000,000
Consumer loans: | Credit cards
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							161,000,000		105,000,000		58,000,000
Provision charged (credited) to income							(66,000,000)		107,000,000		101,000,000
Charge offs							(89,000,000)		(90,000,000)		(60,000,000)
Recoveries							8,000,000		7,000,000		6,000,000
Net (charge offs) recoveries							(81,000,000)		(83,000,000)		(54,000,000)
Allowance for credit losses - end of period	14,000,000				14,000,000		14,000,000		161,000,000		105,000,000
Consumer loans: | Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period							27,000,000		7,000,000		5,000,000
Provision charged (credited) to income							(18,000,000)		27,000,000		5,000,000
Charge offs							(10,000,000)		(11,000,000)		(5,000,000)
Recoveries							1,000,000		1,000,000		2,000,000
Net (charge offs) recoveries							(9,000,000)		(10,000,000)		(3,000,000)
Allowance for credit losses - end of period	$ 0				$ 0		$ 0		27,000,000		7,000,000
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(170,000,000)
Allowance for credit losses - end of period											(170,000,000)
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans: | Real Estate, including Construction
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(112,000,000)
Allowance for credit losses - end of period											(112,000,000)
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans: | Business and corporate banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(60,000,000)
Allowance for credit losses - end of period											(60,000,000)
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans: | Global banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									51,000,000
Allowance for credit losses - end of period											51,000,000
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans: | Other commercial
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(5,000,000)
Allowance for credit losses - end of period											(5,000,000)
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans: | Residential Mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(86,000,000)
Allowance for credit losses - end of period											(86,000,000)
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans: | Home equity mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									7,000,000
Allowance for credit losses - end of period											7,000,000
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans: | Credit cards
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									32,000,000
Allowance for credit losses - end of period											32,000,000
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans: | Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									3,000,000
Allowance for credit losses - end of period											3,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									467,000,000
Allowance for credit losses - end of period											467,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans: | Real Estate, including Construction
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									41,000,000
Allowance for credit losses - end of period											41,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans: | Business and corporate banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									179,000,000
Allowance for credit losses - end of period											179,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans: | Global banking
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									157,000,000
Allowance for credit losses - end of period											157,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans: | Other commercial
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									4,000,000
Allowance for credit losses - end of period											4,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans: | Residential Mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									(74,000,000)
Allowance for credit losses - end of period											(74,000,000)
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans: | Home equity mortgages
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									13,000,000
Allowance for credit losses - end of period											13,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans: | Credit cards
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									137,000,000
Allowance for credit losses - end of period											137,000,000
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans: | Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for credit losses - beginning of period									$ 10,000,000
Allowance for credit losses - end of period											$ 10,000,000
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Allowance for Credit Losses - C

Allowance for Credit Losses - Change in Liability for Off-balance Sheet Credit Exposures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 237	$ 104	$ 96
Provision charged (credited) to income	(134)	79	8
Balance at end of period	103	237	104
Cumulative Effect, Period of Adoption, Adjustment
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	0	54	0
Balance at end of period		0	54
Cumulative Effect, Period of Adoption, Adjusted Balance
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 237	158	96
Balance at end of period		$ 237	$ 158

Allowance for Credit Losses -_2

Allowance for Credit Losses - Accrued Interest Receivables (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Total accrued interest receivables	$ 205	$ 264
Allowance for credit losses	1	2
Accrued interest receivables, net	204	262
Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total accrued interest receivables	109	140
Securities held-to-maturity
Financing Receivable, Allowance for Credit Loss [Line Items]
Total accrued interest receivables	13	23
Other financial assets measured at amortized cost
Financing Receivable, Allowance for Credit Loss [Line Items]
Total accrued interest receivables	1	1
Securities available-for-sale ("AFS")
Financing Receivable, Allowance for Credit Loss [Line Items]
Total accrued interest receivables	$ 82	$ 100

Loans Held for Sale (Details)

Loans Held for Sale (Details) - USD ($) $ in Millions		Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	[1]	$ 4,217		$ 337
Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale			$ 1,100
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		461		129
Commercial loans: | Real Estate, including Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		0		10
Commercial loans: | Business and corporate banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		123		0
Commercial loans: | Global banking
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		338		119
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,756		208
Consumer loans: | Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,082		208
Consumer loans: | Home Equity Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		275		0
Consumer loans: | Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		195		0
Consumer loans: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		$ 204		$ 0
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Loans Held for Sale - Additiona

Loans Held for Sale - Additional Information (Details) - USD ($)		3 Months Ended			6 Months Ended	12 Months Ended
		Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	[1]	$ 4,217,000,000			$ 4,217,000,000	$ 4,217,000,000	$ 337,000,000
Loans, designated under fair value option		0			0	0	32,000,000
Loans	[1]	55,864,000,000			55,864,000,000	55,864,000,000	62,088,000,000
Revenue (losses) associated with the economic hedging program						1,055,000,000	824,000,000	$ 2,082,000,000
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lower of amortized cost or fair value adjustment				$ 0
Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		461,000,000			461,000,000	461,000,000	129,000,000
Loans		39,796,000,000			39,796,000,000	39,796,000,000	41,599,000,000
Valuation allowance		5,000,000			5,000,000	5,000,000	1,000,000
Commercial loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		79,000,000		149,000,000	79,000,000	79,000,000
Lower of amortized cost or fair value adjustment				0
Consumer loans held for sale | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		778,000,000			778,000,000	778,000,000
Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,756,000,000			3,756,000,000	3,756,000,000	208,000,000
Loans		16,068,000,000			16,068,000,000	16,068,000,000	20,489,000,000
Valuation allowance		7,000,000			7,000,000	7,000,000	0
Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,681,000,000		3,616,000,000	3,681,000,000	3,681,000,000
Lower of amortized cost or fair value adjustment				0	7,000,000
Commercial Loans - Transferred to Held for Sale | Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		359,000,000			359,000,000	359,000,000	93,000,000
Commercial Real Estate Loans - Transferred to Held for Sale | Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lower of amortized cost or fair value adjustment			$ 0
Sales of loans held for sale		1,032,000,000
Gain on sale of loans		0
Commercial Loans - Fair Value Option | Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		23,000,000			23,000,000	23,000,000	36,000,000
Residential mortgages | Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,082,000,000			3,082,000,000	3,082,000,000	208,000,000
Loans		15,469,000,000			15,469,000,000	15,469,000,000	18,377,000,000
Residential mortgages | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		3,007,000,000		2,364,000,000	3,007,000,000	3,007,000,000
Home Equity Mortgages | Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		275,000,000			275,000,000	275,000,000	0
Home Equity Mortgages | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		275,000,000		265,000,000	275,000,000	275,000,000
Credit cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale				1,100,000,000
Credit cards | Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		195,000,000			195,000,000	195,000,000	0
Loans		204,000,000			204,000,000	204,000,000	1,066,000,000
Credit cards | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		195,000,000		829,000,000	195,000,000	195,000,000
Sales of loans held for sale		382,000,000
Gain on sale of loans		$ 9,000,000
Credit cards | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Period of loan servicing after sale		1 year
Student Loans | Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, designated under fair value option		$ 25,000,000			25,000,000	25,000,000	32,000,000
Other consumer | Consumer loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		204,000,000			204,000,000	204,000,000	0
Loans		70,000,000			70,000,000	70,000,000	319,000,000
Other consumer | Consumer loans: | Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale		$ 204,000,000		$ 158,000,000	$ 204,000,000	204,000,000
Other income (loss) | Commercial loans:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lower of amortized cost or fair value adjustment						7,000,000	23,000,000	0
Residential mortgage banking revenue (expense)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenue (losses) associated with the economic hedging program						$ (2,000,000)	$ (6,000,000)	$ (1,000,000)
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Properties and Equipment, Net_2

Properties and Equipment, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 360	$ 677
Accumulated depreciation and amortization		(320)	(533)
Properties and equipment, net	[1]	40	144
Depreciation and amortization		22	34	$ 43
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross		2	5
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross		291	543
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 67	129
Retail branch properties | Corporate Center
Property, Plant and Equipment [Line Items]
Gain on sale of certain owned retail branch properties			$ 18
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 458	[1]	$ 458	[1]	$ 1,242
Accumulated impairment loss	1,819		1,819
Goodwill impairment charge	$ 0		784		365
Wealth and Personal Banking
Goodwill [Line Items]
Goodwill					737
Goodwill impairment charge			$ 784		$ 365
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Leases - Components of Operatin

Leases - Components of Operating Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease cost	$ 87	$ 127	$ 136
Variable lease cost	48	59	63
Short-term lease cost	0	0	4
Sublease income	(43)	(54)	(60)
Total operating lease costs, net	92	132	143
Cash paid for amounts included in the measurement of operating lease liabilities	129	135	126
ROU assets recognized for new operating lease liabilities	$ 0	$ 24	$ 132

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2021branch	Mar. 31, 2020branch	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)branch
Leases [Abstract]
Impairment charge			$ 63	$ 76	$ 13
Number of branches closing | branch	30	60			20
Operating leases, not yet commenced			$ 0

Leases - Operating ROU Assets a

Leases - Operating ROU Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease ROU assets	$ 181	$ 527
Operating lease liabilities	$ 305	$ 625
Weighted-average remaining lease term	6 years 8 months 12 days	6 years 9 months 18 days
Weighted-average discount rate (percent)	3.00%	3.00%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, net of allowance for credit losses of $1 million and $2 million at December 31, 2021 and 2020, respectively	Other assets, net of allowance for credit losses of $1 million and $2 million at December 31, 2021 and 2020, respectively
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Interest, taxes and other liabilities	Interest, taxes and other liabilities

Leases - Maturity Analysis of O

Leases - Maturity Analysis of Operating Lease Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Maturity of Operating Lease Liabilities
2022	$ 79
2023	78
2024	70
2025	35
2026	15
Thereafter	65
Total future operating lease payments	342
Less - imputed interest	(37)
Total operating lease liabilities	$ 305	$ 625

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Deposits	$ 143,032	$ 145,150		$ 119,693
Deposits held for sale	8,750	0	[1]
Gain on extinguishment of time deposits		12
Overdraft deposits	345	392
Other Expense
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
FDIC assessment fees	63	71		$ 24
Deposits
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Deposits, Fair Value Disclosure	$ 2,749	$ 4,155
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Deposits - Time Deposits (Detai

Deposits - Time Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Time Deposits, $250,000 or More	$ 6,405	$ 14,502
Domestic Deposits
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Time Deposits, $250,000 or More	6,140	14,270
Foreign Deposits
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Time Deposits, $250,000 or More	$ 265	$ 232

Deposits - Maturity (Details)

Deposits - Maturity (Details) $ in Millions	Dec. 31, 2021USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
2022	$ 5,986
2023	541
2024	391
2025	315
2026	1,719
Thereafter	558
Time Deposits	9,510
Domestic Deposits
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
2022	5,721
2023	541
2024	391
2025	315
2026	1,719
Thereafter	558
Time Deposits	9,245
Foreign Deposits
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
2022	265
2023	0
2024	0
2025	0
2026	0
Thereafter	0
Time Deposits	$ 265

Short-Term Borrowings-Schedule

Short-Term Borrowings-Schedule (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term borrowings	[1]		$ 6,338	$ 4,952
Securities sold under repurchase agreements
Short-term Debt [Line Items]
Short-term borrowings			$ 2,315	$ 1,765
Weighted average interest rate, point in time (percent)			0.05%	0.22%
Loss on extinguishment of certain repurchase agreements		$ (14)
Commercial paper
Short-term Debt [Line Items]
Short-term borrowings			$ 3,683	$ 2,998
Weighted average interest rate, point in time (percent)			0.36%	0.52%
Other
Short-term Debt [Line Items]
Short-term borrowings			$ 340	$ 189
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Long-Term Debt-Schedule (Detail

Long-Term Debt-Schedule (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt	[1]	$ 17,236	$ 19,979
Repayments of long-term debt		10,044	10,427	$ 10,705
HNAH
Debt Instrument [Line Items]
Long-term debt		5,500	2,900
Repayments of long-term debt		850
HSBC USA
Debt Instrument [Line Items]
Long-term debt		14,060	13,544
Mark-to-market adjustment on fair value option debt		1,145	1,344
Repayments of long-term debt		6,000	7,565	$ 5,897
HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		3,176	6,435
Mark-to-market adjustment on fair value option debt		222	308
Structured notes
Debt Instrument [Line Items]
Long-term debt		1,853	448
Senior debt: | HSBC USA
Debt Instrument [Line Items]
Long-term debt		12,693	10,928
Senior debt: | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		1,513	4,686
Senior debt: | Fixed-rate notes | HSBC USA
Debt Instrument [Line Items]
Long-term debt		$ 6,347	2,990
Interest rate, weighted average		2.63%
Senior debt: | Fixed-rate notes | HSBC USA | Minimum
Debt Instrument [Line Items]
Interest rate, fixed		1.12%
Senior debt: | Fixed-rate notes | HSBC USA | Maximum
Debt Instrument [Line Items]
Interest rate, fixed		4.20%
Senior debt: | Structured notes | HSBC USA
Debt Instrument [Line Items]
Long-term debt		$ 6,346	7,938
Interest rate, weighted average		0.62%
Senior debt: | Structured notes | HSBC USA | Minimum
Debt Instrument [Line Items]
Interest rate, floating		0.13%
Senior debt: | Structured notes | HSBC USA | Maximum
Debt Instrument [Line Items]
Interest rate, floating		2.51%
Senior debt: | Structured notes | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		$ 488	394
Interest rate, weighted average		1.22%
Senior debt: | Structured notes | HSBC Bank USA and its Subsidiaries | Minimum
Debt Instrument [Line Items]
Interest rate, floating		(0.08%)
Senior debt: | Structured notes | HSBC Bank USA and its Subsidiaries | Maximum
Debt Instrument [Line Items]
Interest rate, floating		3.04%
Senior debt: | Floating Rate Notes | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		$ 25	42
Interest rate, weighted average		0.31%
Senior debt: | Floating Rate Notes | HSBC Bank USA and its Subsidiaries | Minimum
Debt Instrument [Line Items]
Interest rate, floating		0.02%
Senior debt: | Floating Rate Notes | HSBC Bank USA and its Subsidiaries | Maximum
Debt Instrument [Line Items]
Interest rate, floating		0.91%
Senior debt: | FHLB advances - fixed-rate | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		$ 0	3,250
Senior debt: | FHLB advances - floating-rate | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		$ 1,000	1,000
Interest rate, weighted average		0.23%
Interest rate, floating		0.23%
Subordinated debt: | HSBC USA
Debt Instrument [Line Items]
Long-term debt		$ 222	1,272
Subordinated debt: | Fixed-rate notes | HSBC USA
Debt Instrument [Line Items]
Long-term debt		$ 222	422
Interest rate, weighted average		7.20%
Subordinated debt: | Fixed-rate notes | HSBC USA | Minimum
Debt Instrument [Line Items]
Interest rate, fixed		7.20%
Subordinated debt: | Fixed-rate notes | HSBC Bank USA and its Subsidiaries
Debt Instrument [Line Items]
Long-term debt		$ 1,441	1,441
Interest rate, weighted average		6.36%
Subordinated debt: | Fixed-rate notes | HSBC Bank USA and its Subsidiaries | Minimum
Debt Instrument [Line Items]
Interest rate, fixed		5.63%
Subordinated debt: | Fixed-rate notes | HSBC Bank USA and its Subsidiaries | Maximum
Debt Instrument [Line Items]
Interest rate, fixed		7.00%
Subordinated debt: | Floating Rate Notes | HSBC USA
Debt Instrument [Line Items]
Long-term debt		$ 0	$ 850
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Long-Term Debt-Additional Infor

Long-Term Debt-Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Long-term debt | Secured Debt | FHLB and Federal Reserve Bank of New York Secured Borrowing Facilities
Debt Instrument [Line Items]
Current borrowing capacity		$ 15,057
Federal Home Loan Bank of New York | Long-term debt | Secured Debt
Debt Instrument [Line Items]
Amount outstanding under the loan agreement		1,000	$ 4,250
Borrowings
Debt Instrument [Line Items]
Fixed rate long-term debt, Fair Value		945	1,030
Outstanding debt repurchased	$ 1,269
Pre-tax gain on extinguishment of debt	$ 84
Borrowings | Structured notes
Debt Instrument [Line Items]
Long-term debt, Fair value		$ 7,997	$ 9,695

Long-Term Debt-Maturity Schedul

Long-Term Debt-Maturity Schedule (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Long-term Debt, Fiscal Year Maturity [Abstract]
2022		$ 2,930
2023		1,593
2024		2,014
2025		4,474
2026		631
Thereafter		5,594
Total	[1]	$ 17,236	$ 19,979
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Derivative Financial Instrume_3

Derivative Financial Instruments - Fair Value of Derivatives and Balance Offsetting (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 16,229	$ 32,468
Derivative Liabilities	15,285	31,461
Netting assets	11,991	25,537
Netting liabilities	11,991	25,537
Less: Gross amounts of cash collateral received subject to enforceable master netting agreements	2,797	4,079
Less: Gross amounts of cash collateral posted subject to enforceable master netting agreements	1,296	3,377
Derivative asset	1,441	2,852
Derivative liability	1,998	2,547
Less: Gross amounts of financial instrument collateral received not offset	179	817
Less: Gross amounts of financial instrument collateral posted not offset	194	691
Net amount of derivative asset	1,262	2,035
Net amount of derivative liability	1,804	1,856
Trading Assets
Derivatives, Fair Value [Line Items]
Less: Gross amounts of cash collateral received subject to enforceable master netting agreements	1,419	2,763
Trading Liabilities
Derivatives, Fair Value [Line Items]
Less: Gross amounts of cash collateral posted subject to enforceable master netting agreements	1,296	3,377
Designated as Hedging Instrument | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	29	0
Designated as Hedging Instrument | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	7	55
Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	1,801	6,598
Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1,887	6,622
Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	11,321	18,467
Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	11,125	18,549
Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	940	1,323
Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	779	1,578
Credit contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Credit contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	57	64
OTC Cleared | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	37	0
OTC Cleared | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	58
OTC Cleared | Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	0	168
OTC Cleared | Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
OTC Cleared | Credit contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
OTC Cleared | Credit contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	19	14
Bilateral OTC | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	1,756	6,584
Bilateral OTC | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1,877	6,555
Bilateral OTC | Interest rate contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	47	89
Bilateral OTC | Interest rate contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	5	1
Bilateral OTC | Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	11,321	18,299
Bilateral OTC | Foreign exchange contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	11,125	18,549
Bilateral OTC | Foreign exchange contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Bilateral OTC | Foreign exchange contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1	1
Bilateral OTC | Equity contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	588	4,009
Bilateral OTC | Equity contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1,240	4,200
Bilateral OTC | Equity contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	1,470	1,607
Bilateral OTC | Equity contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	121	91
Bilateral OTC | Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	936	1,323
Bilateral OTC | Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	779	1,550
Bilateral OTC | Credit contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	28	367
Bilateral OTC | Credit contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	25	233
Bilateral OTC | Credit contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Bilateral OTC | Credit contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	38	50
Bilateral OTC | Other Contracts | Not Designated as Hedging Instrument, Other | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	5	8
Bilateral OTC | Other Contracts | Not Designated as Hedging Instrument, Other | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	38	67
Bilateral OTC | Fair Value Hedging | Interest rate contracts | Designated as Hedging Instrument | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Bilateral OTC | Fair Value Hedging | Interest rate contracts | Designated as Hedging Instrument | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	5	2
Bilateral OTC | Cash Flow Hedging | Interest rate contracts | Designated as Hedging Instrument | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Bilateral OTC | Cash Flow Hedging | Interest rate contracts | Designated as Hedging Instrument | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	2	0
Bilateral OTC | Cash Flow Hedging | Foreign exchange contracts | Designated as Hedging Instrument | Other assets:
Derivatives, Fair Value [Line Items]
Derivative Assets	29	0
Bilateral OTC | Cash Flow Hedging | Foreign exchange contracts | Designated as Hedging Instrument | Interest taxes and other liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	53
Exchange Traded | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	8	14
Exchange Traded | Interest rate contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	10	9
Exchange Traded | Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	4	0
Exchange Traded | Precious metals contracts | Not Designated as Hedging Instrument, Trading | Trading Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 0	$ 28

Derivative Financial Instrume_4

Derivative Financial Instruments - Carrying Value of Hedged Items in Fair Value Hedge (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Securities available-for-sale ("AFS")
Derivatives, Fair Value [Line Items]
Carrying amount of hedged items	$ 7,919	$ 7,966
Active hedged asset adjustments	(72)	681
Discontinued hedged asset adjustments	1,010	738
Total hedged asset adjustments	938	1,419
Deposits
Derivatives, Fair Value [Line Items]
Carrying amount of hedged liability items	1,598	5,214
Active hedged liability adjustments	(27)	214
Discontinued hedged liability adjustments	125	0
Total hedged liability adjustments	98	214
Long-term debt
Derivatives, Fair Value [Line Items]
Carrying amount of hedged liability items	5,587	2,227
Active hedged liability adjustments	(61)	242
Discontinued hedged liability adjustments	148	(15)
Total hedged liability adjustments	$ 87	$ 227

Derivative Financial Instrume_5

Derivative Financial Instruments - Gains and Losses on Hedged Items in Fair Value Hedges (Detail) - Net interest income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivatives	$ 50	$ (418)	$ (541)
Gain (Loss) on Hedged Items	(49)	378	383
Securities available-for-sale ("AFS") | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivatives	129	(731)	(776)
Gain (Loss) on Hedged Items	(29)	900	1,086
Deposits | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivatives	(49)	148
Gain (Loss) on Hedged Items	(6)	(261)
Long-term Debt | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Derivatives	(30)	165	235
Gain (Loss) on Hedged Items	$ (14)	$ (261)	$ (703)

Derivative Financial Instrume_6

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
(Gains) Losses related to discontinued cash flow hedge relationships amortized to earnings	$ 13	$ (11)	$ (35)
Next twelve months, reclassification of remaining losses to earnings resulting from cash flow hedges	10
Aggregate fair value of all derivative instruments with credit-risk related contingent features	361	221
Collateral already posted aggregate fair value	$ 172	$ 67

Derivative Financial Instrume_7

Derivative Financial Instruments - Gains and Losses on Derivative Instruments Designated and Qualifying As Hedging Instruments in Cash Flow Hedges (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives	$ (65)	$ 84	$ (24)
Gain (Loss) Reclassified From AOCI into Income	13	(11)	(35)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives	(1)	0	3
Foreign exchange contracts | Net interest income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified From AOCI into Income	0	0	0
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives	(64)	84	(27)
Interest rate contracts | Net interest income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified From AOCI into Income	$ 13	$ (11)	$ (35)

Derivative Financial Instrume_8

Derivative Financial Instruments - Gains and Losses on Derivative Instruments Held For Trading Purpose (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ (1,941)	$ (256)	$ (408)
Trading revenue | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(11)	396	(89)
Trading revenue | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	274	(747)	310
Trading revenue | Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(2,432)	57	(496)
Trading revenue | Precious metals contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	145	594	312
Trading revenue | Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ 83	$ (556)	$ (445)

Derivative Financial Instrume_9

Derivative Financial Instruments - Gains and Losses on Derivative Instruments Held For Other Purpose (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ 1,055	$ 824	$ 2,082
Gain (loss) on instruments designated at fair value and related derivatives
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	1,040	824	2,131
Gain (loss) on instruments designated at fair value and related derivatives | Interest rate contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(61)	229	364
Gain (loss) on instruments designated at fair value and related derivatives | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	0	(1)	(3)
Gain (loss) on instruments designated at fair value and related derivatives | Equity contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	1,139	592	1,809
Gain (loss) on instruments designated at fair value and related derivatives | Credit contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	0	37	0
Other income (loss) | Interest rate contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(2)	(6)	(1)
Other income (loss) | Credit contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	(19)	(18)	(24)
Other income (loss) | Other Contracts
Derivatives, Fair Value [Line Items]
Gain (Loss) Recognized in Income on Derivatives	$ (2)	$ (9)	$ (63)

Derivative Financial Instrum_10

Derivative Financial Instruments - Credit-Risk Related Contingent Features (Detail) $ in Millions	Dec. 31, 2021USD ($)
One-notch downgrade
Derivative [Line Items]
Amount of additional collateral to be posted upon downgrade	$ 20
Two-notch downgrade
Derivative [Line Items]
Amount of additional collateral to be posted upon downgrade	$ 68

Derivative Financial Instrum_11

Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Total	$ 1,395,345	$ 2,021,133
Interest rate contracts
Derivative [Line Items]
Total	246,092	509,403
Futures and forwards
Derivative [Line Items]
Total	44,686	37,098
Swaps
Derivative [Line Items]
Total	177,876	406,609
Options written
Derivative [Line Items]
Total	10,842	33,269
Options purchased
Derivative [Line Items]
Total	12,688	32,427
Foreign exchange contracts
Derivative [Line Items]
Total	1,063,299	1,359,284
Swaps, futures and forwards
Derivative [Line Items]
Total	974,725	1,195,449
Options written
Derivative [Line Items]
Total	28,577	53,200
Options purchased
Derivative [Line Items]
Total	28,678	53,595
Spot
Derivative [Line Items]
Total	31,319	57,040
Total commodities, equities and precious metals
Derivative [Line Items]
Total	77,727	98,619
Swaps, futures and forwards
Derivative [Line Items]
Total	60,054	54,458
Options written
Derivative [Line Items]
Total	5,873	17,078
Options purchased
Derivative [Line Items]
Total	11,800	27,083
Credit contracts
Derivative [Line Items]
Total	7,023	52,611
Other Contracts
Derivative [Line Items]
Total	$ 1,204	$ 1,216

Fair Value Option - Additional

Fair Value Option - Additional Information (Details) - Commercial loans held for sale - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value option, loans 90 days or more past due	$ 0	$ 0
Fair value option loan in nonaccrual status	$ 0	$ 0

Fair Value Option - Summary of

Fair Value Option - Summary of Fair Value and Unpaid Principal Balance (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans, designated under fair value option	$ 0	$ 32
Commercial loans held for sale, Fair Value	48	36
Student Loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans, designated under fair value option	25	32
Loans held for investment, Unpaid Principal Balance	28	34
Fair Value Over (Under) Unpaid Principal Balance	(3)	(2)
Commercial loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Commercial loans held for sale, Fair Value	23	36
Commercial loans held for sale, Unpaid Principal Balance	23	36
Fair Value Over (Under) Unpaid Principal Balance	0	0
Fixed rate long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Over (Under) Unpaid Principal Balance	204	289
Fixed rate long-term debt, Fair Value	945	1,030
Fixed rate long-term debt, Unpaid Principal Balance	741	741
Fixed rate long-term debt | Structured notes
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Over (Under) Unpaid Principal Balance	1,163	1,363
Hybrid instruments, Unpaid Principal Balance	6,834	8,332
Hybrid instruments, structured notes, Fair Value	7,997	9,695
Structured deposits
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Over (Under) Unpaid Principal Balance	284	311
Hybrid instruments, structured deposits, Fair Value	2,749	4,155
Hybrid instruments, Unpaid Principal Balance	$ 2,465	$ 3,844

Fair Value Option - Components

Fair Value Option - Components of Gain (Loss) on Instruments at Fair Value and Related Derivatives (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components Of Gain On Instruments At Fair Value And Related Derivatives [Line Items]
Mark-to-market on related derivatives	$ 1,055	$ 824	$ 2,082
Gain (loss) on instruments designated at fair value and related derivatives	35	34	(13)
Gain (loss) on instruments designated at fair value and related derivatives
Components Of Gain On Instruments At Fair Value And Related Derivatives [Line Items]
Interest rate and other components	(1,045)	(774)	(2,186)
Credit risk component, total	2	(49)	3
Total mark-to-market on financial instruments designated at fair value	(1,043)	(823)	(2,183)
Mark-to-market on related derivatives	1,040	824	2,131
Net realized gain on related long-term debt derivatives	38	33	39
Gain (loss) on instruments designated at fair value and related derivatives	35	34	(13)
Gain (loss) on instruments designated at fair value and related derivatives | Loans
Components Of Gain On Instruments At Fair Value And Related Derivatives [Line Items]
Interest rate and other components	0	0	0
Credit risk component, assets	2	(49)	3
Total mark-to-market on financial instruments designated at fair value	2	(49)	3
Mark-to-market on related derivatives	0	37	0
Net realized gain on related long-term debt derivatives	0	0	0
Gain (loss) on instruments designated at fair value and related derivatives	2	(12)	3
Gain (loss) on instruments designated at fair value and related derivatives | Fixed rate long-term debt
Components Of Gain On Instruments At Fair Value And Related Derivatives [Line Items]
Interest rate and other components	74	(79)	(200)
Credit risk component, liabilities	0	0	0
Total mark-to-market on financial instruments designated at fair value	74	(79)	(200)
Mark-to-market on related derivatives	(88)	88	148
Net realized gain on related long-term debt derivatives	38	33	39
Gain (loss) on instruments designated at fair value and related derivatives	24	42	(13)
Gain (loss) on instruments designated at fair value and related derivatives | Hybrid Instruments
Components Of Gain On Instruments At Fair Value And Related Derivatives [Line Items]
Interest rate and other components	(1,119)	(695)	(1,986)
Credit risk component, liabilities	0	0	0
Total mark-to-market on financial instruments designated at fair value	(1,119)	(695)	(1,986)
Mark-to-market on related derivatives	1,128	699	1,983
Net realized gain on related long-term debt derivatives	0	0	0
Gain (loss) on instruments designated at fair value and related derivatives	$ 9	$ 4	$ (3)

Income Taxes - Continuing Opera

Income Taxes - Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ 224	$ (42)	$ 157
Income tax expense (benefit) included in common equity related to:
Unrealized gains (losses) on investment securities	(258)	274	128
Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread	4	8	(98)
Unrealized gains (losses) on derivatives designated as cash flow hedges	(19)	23	3
Employer accounting for post-retirement plans	1	(1)	(5)
Total income taxes	$ (48)	$ 262	$ 185

Income Taxes - Components (Deta

Income Taxes - Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ (111)	$ (45)	$ (3)
State and local	(7)	(9)	35
Foreign	2	(13)	16
Total current	(116)	(67)	48
Deferred	340	25	109
Provision (benefit) for income taxes	$ 224	$ (42)	$ 157

Income Taxes - Effective tax ra

Income Taxes - Effective tax rates (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income tax reconciliation
Tax expense (benefit) at the U.S. Federal statutory income tax rate	$ 192	$ (206)	$ 57
State and local taxes, net of Federal benefit	31	(2)	23
Non-deductible FDIC assessment fees	13	15	5
Non-deductible goodwill impairment	0	165	77
Items affecting prior periods	0	3	7
Uncertain tax positions	6	(8)	5
Low income housing and other tax credit investments	(15)	(14)	(13)
Other	(3)	5	(4)
Provision (benefit) for income taxes	$ 224	$ (42)	$ 157
Effective income tax reconciliation
Tax expense (benefit) at the U.S. federal statutory income tax rate (in percent)	21.00%	(21.00%)	21.00%
State and local taxes, net of federal benefit (in percent)	3.40%	(0.20%)	8.50%
Non-deductible FDIC assessment fees (in percent)	1.40%	1.50%	1.90%
Non-deductible goodwill impairment (in percent)	0.00%	16.80%	28.50%
Items affecting prior periods (in percent)	0.00%	0.30%	2.60%
Uncertain tax positions (in percent)	0.70%	(0.80%)	1.90%
Low income housing and other tax credit investments (in percent)	(1.70%)	(1.40%)	(4.80%)
Other (in percent)	(0.20%)	0.50%	(1.50%)
Effective tax rate (in percent)	24.60%	(4.30%)	58.10%

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Position (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 150	$ 245
Accrued expenses	64	108
Interests in real estate mortgage investment conduits	127	158
Unrealized losses on investment securities	21	0
Capitalized costs	495	501
Lease liabilities	111	152
Other	219	268
Total deferred tax assets	1,187	1,432
Deferred tax liabilities:
Lease ROU assets	80	127
Unrealized gains on investment securities	0	237
Amortization of intangible assets	21	19
Fair value adjustments	43	1
Other	14	37
Total deferred tax liabilities	158	421
Net deferred tax asset	$ 1,029	$ 1,011

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of unrecognized tax benefits
Balance at January 1,	$ 20	$ 30	$ 24
Additions for tax positions of prior years	9	0	7
Reductions for tax positions of prior years	(3)	(1)	(1)
Reductions related to settlements with taxing authorities	0	(9)	0
Balance at December 31,	$ 26	$ 20	$ 30

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefit, affect the effective tax rate	$ 22	$ 16	$ 24
Accruals for payment of interest and penalties associated with uncertain tax positions	6	5	$ 10
Increase (decrease) in accruals for payment of interest and penalties associated with uncertain tax positions	1	(5)
Net deferred tax asset	$ 1,029	$ 1,011

Income Taxes - Operating Loss C

Income Taxes - Operating Loss Carryforwards (Details) - State $ in Millions	Dec. 31, 2021USD ($)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 13
Tax Year 2028
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1
Tax Year 2030
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 12

Preferred Stock (Details)

Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Preferred stock outstanding	$ 1,265	$ 1,265
Preferred stock, shares outstanding (shares)	1,265	1,265
6.0% Non-Cumulative Preferred Stock, Series I
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)	1,265	1,265
Dividend rate	6.00%	6.00%
Preferred stock, redemption price per share (usd per share)	$ 1,000,000

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	$ 17,026	$ 16,991
Balance at end of period, common equity	15,775	17,026	$ 16,991
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	679	(279)	(366)
Balance at end of period, common equity	(179)	679	(279)
Accumulated other comprehensive income (loss) | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	679	(277)	(366)
Balance at end of period, common equity		679	(277)
Unrealized gains (losses) on investment securities:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	750	(116)	(519)
Net unrealized gains (losses) arising during the period, net of tax	(774)	944	459
Reclassification adjustment for (gains) losses realized in net income (loss)	(55)	(104)	(67)
Reversal of provision for credit losses realized in net income (loss), net of tax	0	(2)	0
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income (loss), net of tax	14	26	11
Total other comprehensive income (loss) for period	(815)	864	403
Balance at end of period, common equity	(65)	750	(116)
Unrealized gains (losses) on investment securities: | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity		2
Balance at end of period, common equity			2
Unrealized gains (losses) on investment securities: | Cumulative Effect, Period of Adoption, Adjusted Balance
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	750	(114)	(519)
Balance at end of period, common equity		750	(114)
Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	15	(9)	301
Net unrealized gains (losses) arising during the period, net of tax	12	24	(217)
Reclassification adjustment for (gains) losses realized in net income (loss)	0	0	(93)
Total other comprehensive income (loss) for period	12	24	(310)
Balance at end of period, common equity	27	15	(9)
Unrealized gains (losses) on derivatives designated as cash flow hedges:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	(79)	(151)	(159)
Net unrealized gains (losses) arising during the period, net of tax	(49)	64	(19)
Reclassification adjustment for (gains) losses realized in net income (loss)	(10)	8	27
Total other comprehensive income (loss) for period	(59)	72	8
Balance at end of period, common equity	(138)	(79)	(151)
Pension and postretirement benefit liability:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period, common equity	(7)	(3)	11
Net unrealized gains (losses) arising during the period, net of tax	4	(4)	(14)
Total other comprehensive income (loss) for period	4	(4)	(14)
Balance at end of period, common equity	$ (3)	$ (7)	$ (3)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrealized gains (losses) on investment securities:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax on net unrealized gains (losses) arising during period	$ (244)	$ 298	$ 145
Tax on reclassification adjustment	(18)	(33)	(21)
Tax on reversal of provision for credit losses realized in net income (loss)	0	(1)	0
Tax on amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity realized in net income (loss)	4	8	4
Unrealized gains (losses) on fair value option liabilities attributable to our own credit spread:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax on net unrealized gains (losses) arising during period	4	8	(68)
Tax on reclassification adjustment			(30)
Unrealized gains (losses) on derivatives designated as cash flow hedges:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax on net unrealized gains (losses) arising during period	(16)	20	(5)
Tax on reclassification adjustment	(3)	3	8
Pension and postretirement benefit liability:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax on net unrealized gains (losses) arising during period	$ 1	(1)	$ (5)
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment | Unrealized gains (losses) on investment securities:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax on cumulative effect adjustment		$ 1

Share-Based Plans - Narrative (

Share-Based Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee stock purchase plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense (less than in all years for ESPP)	$ 1,000,000	$ 1,000,000	$ 1,000,000
Restricted stock units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Stock compensation expense (less than in all years for ESPP)	$ 15,000,000	22,000,000	25,000,000
Compensation expense not yet recognized	$ 7,000,000
Compensation expense not yet recognized, period for recognition	1 year
Restricted stock units (RSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Restricted stock units (RSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
ShareMatch | Employee stock purchase plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum monthly purchase per employee	$ 342	$ 327	$ 302
Employee investment shares (in shares)	3
Award vesting period	3 years

Pension and Other Postretirem_3

Pension and Other Postretirement Benefits-Net Periodic Benefit Cost (Detail) - HSBC North America - HSBC North America Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 42	$ 45	$ 56
Expected return on plan assets	(58)	(68)	(78)
Amortization of net actuarial loss	0	4	21
Administrative costs	3	4	4
Pension (income) expense	$ (13)	$ (15)	$ 3

Pensions and Other Postretireme

Pensions and Other Postretirement Benefits-Assumptions (Details)	3 Months Ended												6 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
HSBC North America Pension Plan
Net Benefit Cost [Abstract]
Discount rate	2.80%	2.70%	3.10%	2.45%	2.55%	2.70%	3.20%	3.15%	3.15%	3.55%	3.85%	4.25%
Expected long-term rate of return on Plan assets													5.00%	3.50%	3.50%	5.00%
Postretirement Plans Other Than Pensions
Projected Benefit Obligation [Abstract]
Discount rate	2.70%				2.25%				3.00%					2.70%	2.25%	3.00%
Salary increase assumption	3.00%				3.00%				3.00%					3.00%	3.00%	3.00%

Pensions and Other Postretire_2

Pensions and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, total cost recognized	$ 26	$ 28	$ 31
Defined contribution plan and other non-qualified supplemental retirement plan, total expense recognized	2	2	$ 2
Postretirement Plans Other Than Pensions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Funded status of plan, asset (liability)	(40)	$ (45)
Defined Benefit Plan, Expected Future Benefit Payment, Year One	$ 4
Health care cost trend rate assumed for current fiscal year, participants under 65	6.30%
Health care cost trend rate assumed for current fiscal year, participants over 65	6.50%
Ultimate health care cost trend rate in 2032	4.50%

Fee Income from Contracts wit_3

Fee Income from Contracts with Customers - Disaggregation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Other non-fee revenues	$ 113	$ 444	$ 670
Total other revenues	1,237	1,535	1,854
Total Fee Income
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	1,124	1,091	1,184
Credit card fees, net
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	37	38	67
Trust and investment management fees
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	108	132	132
Account services
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	290	251	264
Credit facilities
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	320	268	302
Other fees
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	42	48	53
Other fees and commissions
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	652	567	619
Servicing and other fees from HSBC affiliates
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	321	347	354
Insurance
Disaggregation of Revenue [Line Items]
Total fee income from contracts with customers	$ 6	$ 7	$ 12

Fee Income from Contracts wit_4

Fee Income from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Deferred fee income	$ 4	$ 3
Credit card fees, net
Disaggregation of Revenue [Line Items]
Rewards program costs	67	41	$ 44
Interchange fees	$ 93	$ 71	$ 101

Related Party Transactions - Su

Related Party Transactions - Summary of Related Party Transactions (Details) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Assets:
Cash and due from banks	[1]	$ 954		$ 1,302
Interest bearing deposits with banks	[1]	47,400		14,353
Securities purchased under agreements to resell	[1]	10,514		35,746
Trading assets	[1]	24,043		27,284
Loans	[1]	55,864		62,088
Other	[1]	5,439		6,084
Total assets		189,232	[1]	196,434	[1]	$ 175,375
Liabilities:
Deposits		143,032		145,150		$ 119,693
Trading liabilities	[1]	3,023		5,397
Short-term borrowings	[1]	6,338		4,952
Long-term debt	[1]	17,236		19,979
Other	[1]	2,411		2,665
Total liabilities	[1]	172,192		178,143
Affiliated Entity
Assets:
Cash and due from banks		300		516
Interest bearing deposits with banks		59		187
Securities purchased under agreements to resell		594		3,941
Trading assets		119		314
Loans		2,793		1,100
Other		401		319
Total assets		4,266		6,377
Liabilities:
Deposits		9,137		15,163
Trading liabilities		130		2,375
Short-term borrowings		309		270
Long-term debt		5,511		2,878
Other		277		268
Total liabilities		$ 15,364		$ 20,954
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Related Party Transactions - _2

Related Party Transactions - Summary of Related Party Transactions (Income - Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Interest income	$ 2,675	$ 3,572	$ 4,990
Interest expense	(592)	(1,398)	(2,878)
Net interest income	2,083	2,174	2,112
Trading revenue (expense)	24	273	591
Servicing and other fees from HSBC affiliates: [Abstract]
Gain on instruments designated at fair value and related derivatives	35	34	(13)
Support services from HSBC affiliates:
Total support services from HSBC affiliates	(1,620)	(1,551)	(1,638)
Affiliated Entity
Related Party Transaction [Line Items]
Interest income	26	55	168
Interest expense	(237)	(354)	(538)
Net interest income	(211)	(299)	(370)
Trading revenue (expense)	(3,182)	(93)	(2,669)
Servicing and other fees from HSBC affiliates: [Abstract]
Gain on instruments designated at fair value and related derivatives	1,128	699	1,986
Support services from HSBC affiliates:
Total support services from HSBC affiliates	(1,620)	(1,551)	(1,638)
Rental income from HSBC affiliates, net	42	44	55
Stock based compensation expense	(15)	(22)	(25)
HSBC Markets (USA) Inc. (HMUS) and subsidiaries [Member]
Support services from HSBC affiliates:
Total support services from HSBC affiliates	(118)	(89)	(100)
Other HSBC affiliates
Support services from HSBC affiliates:
Total support services from HSBC affiliates	(441)	(396)	(385)
HSBC Technology and Services (USA) (HTSU) [Member]
Support services from HSBC affiliates:
Total support services from HSBC affiliates	(1,061)	(1,066)	(1,153)
Servicing and other fees from HSBC affiliates
Servicing and other fees from HSBC affiliates: [Abstract]
Other revenues	321	347	354
Servicing and other fees from HSBC affiliates | Affiliated Entity
Servicing and other fees from HSBC affiliates: [Abstract]
Other revenues	321	347	354
Servicing and other fees from HSBC affiliates | HSBC Bank plc [Member]
Servicing and other fees from HSBC affiliates: [Abstract]
Other revenues	176	186	171
Servicing and other fees from HSBC affiliates | HSBC Markets (USA) Inc. (HMUS) and subsidiaries [Member]
Servicing and other fees from HSBC affiliates: [Abstract]
Other revenues	91	107	111
Servicing and other fees from HSBC affiliates | Other HSBC affiliates
Servicing and other fees from HSBC affiliates: [Abstract]
Other revenues	$ 54	$ 54	$ 72

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($)		3 Months Ended	12 Months Ended
		Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Long-term debt	[1]	$ 17,236,000,000	$ 17,236,000,000	$ 19,979,000,000
Notional value of derivative contracts		1,395,345,000,000	1,395,345,000,000	2,021,133,000,000
Preferred stock issued		1,265,000,000	1,265,000,000	1,265,000,000
Preferred stock outstanding		1,265,000,000	1,265,000,000	1,265,000,000
Return of capital to parent			1,000,000,000	0	$ 2,400,000,000
HNAH
Related Party Transaction [Line Items]
Return of capital to parent		1,000,000,000
HNAH
Related Party Transaction [Line Items]
Long-term debt		5,500,000,000	5,500,000,000	2,900,000,000
Maximum borrowing capacity		4,000,000,000	4,000,000,000
Amount outstanding under the loan agreement		0	0	0
Loans receivable from related parties		1,000,000,000	1,000,000,000	0
Preferred stock issued		1,265,000,000	1,265,000,000	1,265,000,000
Preferred stock outstanding		1,265,000,000	1,265,000,000	1,265,000,000
HMUS
Related Party Transaction [Line Items]
Extended loans and lines of credit		11,900,000,000	11,900,000,000	12,000,000,000
Amount outstanding on line of credit		1,600,000,000	1,600,000,000	1,100,000,000
Loans receivable from related parties		1,576,000,000	1,576,000,000	1,088,000,000
Other HSBC affiliates
Related Party Transaction [Line Items]
Extended loans and lines of credit		4,000,000,000	4,000,000,000	4,700,000,000
Amount outstanding on line of credit		0	0	0
Loans receivable from related parties		217,000,000	217,000,000	12,000,000
Affiliated Entity
Related Party Transaction [Line Items]
Long-term debt		5,511,000,000	5,511,000,000	2,878,000,000
Loans receivable from related parties		2,793,000,000	2,793,000,000	1,100,000,000
Notional value of derivative contracts		753,200,000,000	753,200,000,000	923,600,000,000
Fair value of derivative assets and liabilities		127,000,000	127,000,000	$ 66,000,000
Fixed Rate Note Maturing September 2025 | HNAH | Senior debt:
Related Party Transaction [Line Items]
Long-term debt		2,000,000,000	2,000,000,000
Fixed Rate Note Maturing June 2030 | HNAH | Senior debt:
Related Party Transaction [Line Items]
Long-term debt		1,500,000,000	1,500,000,000
Fixed Rate Note Maturing June 2025 | HNAH | Senior debt:
Related Party Transaction [Line Items]
Long-term debt		$ 2,000,000,000	$ 2,000,000,000
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Related Party Transactions - _3

Related Party Transactions - Summary of Loans (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
HMUS
Related Party Transaction [Line Items]
Loans receivable from related parties	$ 1,576	$ 1,088
HNAH
Related Party Transaction [Line Items]
Loans receivable from related parties	1,000	0
Other short-term affiliate lending [Member]
Related Party Transaction [Line Items]
Loans receivable from related parties	217	12
Affiliated Entity
Related Party Transaction [Line Items]
Loans receivable from related parties	$ 2,793	$ 1,100

Business Segments Additional In

Business Segments Additional Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)	[1]		$ 4,217	$ 337
Credit cards
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)		$ 1,100
Consumer loans:
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)			3,756	208
Consumer loans: | Credit cards
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)			195	0
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Consumer loans:
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)		3,616	3,681
Exit of Mass Market Retail Banking Business and Remaining Retail Credit Card Portfolio | Consumer loans: | Credit cards
Segment Reporting Information [Line Items]
Loans held for sale (includes $48 million and $36 million designated under fair value option at December 31, 2021 and 2020, respectively, and $2,441 million related to branch disposal group held for sale at December 31, 2021)		829	195
Occupancy Expense, Net | Write Down of Leasehold Improvement Assets
Segment Reporting Information [Line Items]
Fixed asset impairment charges		$ 18	$ 18	$ 16
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Business Segments - Impacts of

Business Segments - Impacts of Changes to Internal Management Reporting (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
GB
Segment Reporting Information [Line Items]
Segment profit (loss) before tax:	$ 209	$ 544
Segment total assets:	11,473	16,002
Segment total deposits:	37,320	24,596
MSS
Segment Reporting Information [Line Items]
Segment profit (loss) before tax:	194	132
Segment total assets:	67,293	71,742
Segment total deposits:	3,417	2,956
GBM Other
Segment Reporting Information [Line Items]
Segment profit (loss) before tax:	(16)	(105)
Segment total assets:	53,597	38,966
Segment total deposits:	3,931	1,498
As Previously Reported | GBM
Segment Reporting Information [Line Items]
Segment profit (loss) before tax:	387	571
Segment total assets:	132,363	126,710
Segment total deposits:	$ 44,668	$ 29,050

Business Segments - Summary on

Business Segments - Summary on Reconciliation of Results Under IFRS to US GAAP (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Operating Statistics [Line Items]
Net interest income (expense)	$ 2,083		$ 2,174		$ 2,112
Other operating income	1,237		1,535		1,854
Total operating income	3,320		3,709		3,966
Provision for credit losses	(570)		810		195
Total income	3,890		2,899		3,771
Operating expenses	2,978		3,881		3,501
Income (loss) before income tax	912		(982)		270
Total assets	189,232	[1]	196,434	[1]	175,375
Total loans, net	55,417		61,073		67,916
Goodwill	458	[1]	458	[1]	1,242
Total deposits	143,032		145,150		119,693
Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	1,904		2,026		2,303
Other operating income	1,430		1,701		1,537
Total operating income (expense)	3,334		3,727		3,840
Expected credit losses / provision for credit losses	(205)		622		171
Total income	3,539		3,105		3,669
Operating expenses	2,898		4,034		3,313
Profit (loss) before income tax	641		(929)		356
Total assets	205,346		229,677		214,223
Total loans, net	55,245		59,489		66,449
Goodwill	358		358		1,051
Total deposits	128,936		137,037		103,589
Group Reporting Basis Adjustments
Operating Statistics [Line Items]
Net interest income (expense)	19		9		13
Other operating income	(51)		(46)		102
Total operating income (expense)	(32)		(37)		115
Expected credit losses / provision for credit losses	(365)		188		32
Total income	333		(225)		83
Operating expenses	62		(172)		169
Profit (loss) before income tax	271		(53)		(86)
Total assets	(16,114)		(33,243)		(38,848)
Total loans, net	(1,991)		(2,307)		(2,965)
Goodwill	100		100		191
Total deposits	(2,889)		(4,253)		(4,747)
Group Reporting Basis Reclassifications
Operating Statistics [Line Items]
Net interest income (expense)	160		139		(204)
Other operating income	(142)		(120)		215
Total operating income (expense)	18		19		11
Expected credit losses / provision for credit losses	0		0		(8)
Total income	18		19		19
Operating expenses	18		19		19
Profit (loss) before income tax	0		0		0
Total assets	0		0		0
Total loans, net	2,163		3,891		4,432
Goodwill	0		0		0
Total deposits	16,985		12,366		20,851
WPB
Operating Statistics [Line Items]
Goodwill					737
WPB | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	801		837		1,018
Other operating income	303		368		330
Total operating income (expense)	1,104		1,205		1,348
Expected credit losses / provision for credit losses	(21)		189		115
Total income	1,125		1,016		1,233
Operating expenses	1,221		2,203		1,645
Profit (loss) before income tax	(96)		(1,187)		(412)
Total assets	62,904		59,200		50,851
Total loans, net	22,285		24,048		24,243
Goodwill	0		0		693
Total deposits	40,232		50,000		44,553
CMB | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	771		821		829
Other operating income	297		234		239
Total operating income (expense)	1,068		1,055		1,068
Expected credit losses / provision for credit losses	(26)		293		55
Total income	1,094		762		1,013
Operating expenses	581		587		581
Profit (loss) before income tax	513		175		432
Total assets	43,052		36,354		34,241
Total loans, net	21,971		23,377		24,647
Goodwill	358		358		358
Total deposits	45,082		42,369		29,986
GB
Operating Statistics [Line Items]
Profit (loss) before income tax			209		544
Total assets			11,473		16,002
Total deposits			37,320		24,596
GB | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	315		369		513
Other operating income	409		351		415
Total operating income (expense)	724		720		928
Expected credit losses / provision for credit losses	(157)		139		1
Total income	881		581		927
Operating expenses	407		372		383
Profit (loss) before income tax	474		209		544
Total assets	10,486		11,473		16,002
Total loans, net	9,930		11,260		15,875
Goodwill	0		0		0
Total deposits	41,343		37,320		24,596
MSS
Operating Statistics [Line Items]
Profit (loss) before income tax			194		132
Total assets			67,293		71,742
Total deposits			3,417		2,956
MSS | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	47		91		91
Other operating income	318		454		358
Total operating income (expense)	365		545		449
Expected credit losses / provision for credit losses	0		0		0
Total income	365		545		449
Operating expenses	275		351		317
Profit (loss) before income tax	90		194		132
Total assets	43,007		67,293		71,742
Total loans, net	178		329		777
Goodwill	0		0		0
Total deposits	1,298		3,417		2,956
GBM Other
Operating Statistics [Line Items]
Profit (loss) before income tax			(16)		(105)
Total assets			53,597		38,966
Total deposits			3,931		1,498
GBM Other | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	(24)		(62)		(83)
Other operating income	100		165		127
Total operating income (expense)	76		103		44
Expected credit losses / provision for credit losses	(1)		1		0
Total income	77		102		44
Operating expenses	98		118		149
Profit (loss) before income tax	(21)		(16)		(105)
Total assets	44,151		53,597		38,966
Total loans, net	881		475		907
Goodwill	0		0		0
Total deposits	981		3,931		1,498
CC | Operating Segments
Operating Statistics [Line Items]
Net interest income (expense)	(6)		(30)		(65)
Other operating income	3		129		68
Total operating income (expense)	(3)		99		3
Expected credit losses / provision for credit losses	0		0		0
Total income	(3)		99		3
Operating expenses	316		403		238
Profit (loss) before income tax	(319)		(304)		(235)
Total assets	1,746		1,760		2,421
Total loans, net	0		0		0
Goodwill	0		0		0
Total deposits	$ 0		$ 0		$ 0
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Business Segments - Group Repor

Business Segments - Group Reporting Basis to US GAAP Adjustments from previous table (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt extinguishment
Segment Reporting Information [Line Items]
Net Interest Income			$ 0
Other Revenues			123
Provision for Credit Losses			0
Operating expenses			0
Profit (Loss) before Income Tax Expense			123
Total assets			0
Deposit incentives
Segment Reporting Information [Line Items]
Net Interest Income	$ 13	$ 14	15
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	9	21	32
Profit (Loss) before Income Tax Expense	4	(7)	(17)
Total assets	(25)	(28)	(23)
Derivatives
Segment Reporting Information [Line Items]
Net Interest Income	0	0	0
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	0	0	0
Profit (Loss) before Income Tax Expense	0	0	0
Total assets	(16,172)	(33,163)	(38,651)
Expected credit losses
Segment Reporting Information [Line Items]
Net Interest Income	0	(4)	(3)
Other Revenues	0	0	(1)
Provision for Credit Losses	(272)	200	32
Operating expenses	0	0	0
Profit (Loss) before Income Tax Expense	272	(204)	(36)
Total assets	(148)	(357)	(357)
Goodwill
Segment Reporting Information [Line Items]
Net Interest Income	0	0	0
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	0	91	156
Profit (Loss) before Income Tax Expense	0	(91)	(156)
Total assets	100	100	191
Leases
Segment Reporting Information [Line Items]
Net Interest Income	16	23	25
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	22	14	8
Profit (Loss) before Income Tax Expense	(6)	9	17
Total assets	13	33	15
Loan origination
Segment Reporting Information [Line Items]
Net Interest Income	(11)	(24)	(27)
Other Revenues	0	(2)	0
Provision for Credit Losses	0	0	0
Operating expenses	(20)	(20)	(19)
Profit (Loss) before Income Tax Expense	9	(6)	(8)
Total assets	23	18	38
Loans held for sale
Segment Reporting Information [Line Items]
Net Interest Income	0	0	2
Other Revenues	(31)	(25)	(1)
Provision for Credit Losses	(93)	(12)	0
Operating expenses	0	0	0
Profit (Loss) before Income Tax Expense	62	(13)	1
Total assets	(31)	0	(5)
Other long-lived assets impairment
Segment Reporting Information [Line Items]
Net Interest Income	0	0
Other Revenues	0	0
Provision for Credit Losses	0	0
Operating expenses	61	(264)
Profit (Loss) before Income Tax Expense	(61)	264
Total assets	152	201
Pension and other postretirement benefit costs
Segment Reporting Information [Line Items]
Net Interest Income	0	0	0
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	(10)	(15)	(12)
Profit (Loss) before Income Tax Expense	10	15	12
Total assets	0	0	0
Renewable energy tax credit investments
Segment Reporting Information [Line Items]
Net Interest Income	0	0	0
Other Revenues	(21)	(11)	(7)
Provision for Credit Losses	0	0	0
Operating expenses	0	0	0
Profit (Loss) before Income Tax Expense	(21)	(11)	(7)
Total assets	3	2	3
Securities transferred to held-to-maturity
Segment Reporting Information [Line Items]
Net Interest Income	0	0	0
Other Revenues	0	0	0
Provision for Credit Losses	0	0	0
Operating expenses	0	0	0
Profit (Loss) before Income Tax Expense	0	0	0
Total assets	(24)	(38)	(65)
Other
Segment Reporting Information [Line Items]
Net Interest Income	1	0	1
Other Revenues	1	(8)	(12)
Provision for Credit Losses	0	0	0
Operating expenses	0	1	4
Profit (Loss) before Income Tax Expense	2	(9)	(15)
Total assets	(5)	(11)	6
Total adjustments
Segment Reporting Information [Line Items]
Net Interest Income	19	9	13
Other Revenues	(51)	(46)	102
Provision for Credit Losses	(365)	188	32
Operating expenses	62	(172)	169
Profit (Loss) before Income Tax Expense	271	(53)	(86)
Total assets	$ (16,114)	$ (33,243)	$ (38,848)

Retained Earnings and Regulat_3

Retained Earnings and Regulatory Capital Requirements - Capital Amounts and Ratios in Accordance With Current Banking Regulations (Details) - HSBC USA $ in Millions	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Common equity Tier 1 ratio:
Capital Amount, Common equity Tier 1	$ 15,341	$ 15,891
Well-Capitalized Ratio, Common equity Tier 1	0.045	0.045
Actual Ratio, Common equity Tier 1	0.151	0.145
Tier 1 capital ratio:
Capital Amount, Tier 1 capital	$ 16,606	$ 17,156
Well-Capitalized Ratio, Tier 1 capital	0.060	0.060
Actual Ratio, Tier 1 capital	0.163	0.156
Total capital ratio:
Capital Amount, Total capital	$ 18,821	$ 20,680
Well-Capitalized Ratio, Total capital	0.100	0.100
Actual Ratio, Total capital	0.185	0.188
Tier 1 leverage ratio:
Capital Amount, Tier 1 leverage capital	$ 16,606	$ 17,156
Well-Capitalized Ratio, Tier 1 leverage capital	0.040	0.040
Actual Ratio, Tier 1 leverage capital	0.085	0.086
Supplementary leverage ratio ("SLR"):
Capital Amount, Supplementary Leverage Ratio	$ 16,606	$ 17,156
Well-Capitalized Ratio, Supplementary Leverage Ratio	0.030	0.030
Actual Ratio, Supplementary Leverage Ratio	0.066	0.078
Risk weighted assets:
Banking Regulation, Risk-Weighted Assets, Actual	$ 101,827	$ 109,809
Adjusted quarterly average assets
Adjusted quarterly average assets	194,469	198,698
Total leverage exposure
Total leverage exposure	251,531	$ 221,216
As Previously Reported
Common equity Tier 1 ratio:
Actual Ratio, Common equity Tier 1		0.147
Tier 1 capital ratio:
Actual Ratio, Tier 1 capital		0.159
Total capital ratio:
Actual Ratio, Total capital		0.192
Risk weighted assets:
Banking Regulation, Risk-Weighted Assets, Actual		$ 107,808
Capital Amount, Common equity Tier 1	$ 17,665	$ 18,180
Well-Capitalized Ratio, Common equity Tier 1	0.065	0.065
Actual Ratio, Common equity Tier 1	0.176	0.164
Capital Amount, Tier 1 capital	$ 20,165	$ 20,680
Well-Capitalized Ratio, Tier 1 capital	0.080	0.080
Actual Ratio, Tier 1 capital	0.201	0.187
Capital Amount, Total capital	$ 22,157	$ 23,303
Well-Capitalized Ratio, Total capital	0.100	0.100
Actual Ratio, Total capital	0.221	0.211
Capital Amount, Tier 1 leverage capital	$ 20,165	$ 20,680
Well-Capitalized Ratio, Tier 1 leverage capital	0.050	0.050
Actual Ratio, Tier 1 leverage capital	0.105	0.103
Capital Amount, Supplementary Leverage Ratio	$ 20,165	$ 20,680
Well-Capitalized Ratio, Supplementary Leverage Ratio	0.030	0.030
Actual Ratio, Supplementary Leverage Ratio	0.081	0.093
Banking Regulation, Risk-Weighted Assets, Actual	$ 100,363	$ 110,682
Adjusted quarterly average assets
Adjusted quarterly average assets	192,521	200,026
Total leverage exposure
Total leverage exposure	$ 248,584	$ 221,334
As Previously Reported
Common equity Tier 1 ratio:
Actual Ratio, Common equity Tier 1		0.172
Tier 1 capital ratio:
Actual Ratio, Tier 1 capital		0.196
Total capital ratio:
Actual Ratio, Total capital		0.220
Risk weighted assets:
Banking Regulation, Risk-Weighted Assets, Actual		$ 105,681

Retained Earnings and Regulat_4

Retained Earnings and Regulatory Capital Requirements - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Return of capital to parent		$ 1,000	$ 0	$ 2,400
HSBC USA
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Return of capital to parent	$ 1,000
HNAH
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Return of capital to parent	$ 1,000

Variable Interest Entities - Su

Variable Interest Entities - Summary of Assets and Liabilities Related to Consolidated Variable Interest Entities (Details) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Variable Interest Entity [Line Items]
Consolidated Assets		$ 189,232	[1]	$ 196,434	[1]	$ 175,375
Consolidated Liabilities	[1]	172,192		178,143
Variable interest entities
Variable Interest Entity [Line Items]
Consolidated Assets		101		89
Consolidated Liabilities		9		10
Low income housing limited liability partnership: | Variable interest entities
Variable Interest Entity [Line Items]
Consolidated Assets		54		79
Consolidated Liabilities		7		9
Low income housing limited liability partnership: | Variable interest entities | Other assets:
Variable Interest Entity [Line Items]
Consolidated Assets		54		79
Low income housing limited liability partnership: | Variable interest entities | Interest, taxes and other liabilities
Variable Interest Entity [Line Items]
Consolidated Liabilities		7		9
Venture debt financing entity: | Variable interest entities
Variable Interest Entity [Line Items]
Consolidated Assets		47		10
Consolidated Liabilities		2		1
Venture debt financing entity: | Variable interest entities | Other assets:
Variable Interest Entity [Line Items]
Consolidated Assets		1		0
Venture debt financing entity: | Variable interest entities | Loans
Variable Interest Entity [Line Items]
Consolidated Assets		46		10
Venture debt financing entity: | Variable interest entities | Interest, taxes and other liabilities
Variable Interest Entity [Line Items]
Consolidated Liabilities		$ 2		$ 1
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Variable Interest Entities - Va

Variable Interest Entities - Variable Interests Held by Us and Our Maximum Exposure to Loss Rising From Our Involvements in Those VIEs (Details) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Variable Interest Entity [Line Items]
Consolidated Assets		$ 189,232	[1]	$ 196,434	[1]	$ 175,375
Consolidated Liabilities	[1]	172,192		178,143
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets Held by Unconsolidated VIEs		7,733
Consolidated Assets		1,698
Consolidated Liabilities		407
Maximum Exposure to Loss		1,698
Limited partnership investments
Variable Interest Entity [Line Items]
Total Assets Held by Unconsolidated VIEs		6,700		4,266
Consolidated Assets		825		629
Consolidated Liabilities		407		285
Maximum Exposure to Loss		825		$ 629
Asset-backed financing SPE
Variable Interest Entity [Line Items]
Total Assets Held by Unconsolidated VIEs		1,033
Consolidated Assets		873
Consolidated Liabilities		0
Maximum Exposure to Loss		$ 873
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Guarantee Arrangements, Pledg_3

Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Carrying Value and Contractual Amounts of our Sell Protection Credit Derivatives and Major Off-Balance Sheet Guarantee Arrangements (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Guarantor Obligations [Line Items]
Carrying Value	$ 7	$ 144
Notional / Maximum Exposure to Loss	10,474	28,045
Credit derivatives
Guarantor Obligations [Line Items]
Carrying Value	7	144
Notional / Maximum Exposure to Loss	2,174	19,500
Financial standby letters of credit, net of participations
Guarantor Obligations [Line Items]
Carrying Value	0	0
Notional / Maximum Exposure to Loss	5,339	5,703
Performance standby letters of credit, net of participations
Guarantor Obligations [Line Items]
Carrying Value	0	0
Notional / Maximum Exposure to Loss	2,961	2,842
Affiliated Entity | Credit derivatives
Guarantor Obligations [Line Items]
Notional / Maximum Exposure to Loss	1,591	13,550
Affiliated Entity | Financial and performance standby letters of credit
Guarantor Obligations [Line Items]
Notional / Maximum Exposure to Loss	$ 1,969	$ 1,836

Guarantee Arrangements, Pledg_4

Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Net Credit Derivative Positions (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Credit Derivatives [Line Items]
Net position, Carrying/Fair Value	$ (55)	$ 70
Notional	2,675	13,611
Sell-protection credit derivative positions
Credit Derivatives [Line Items]
Carrying/Fair Value	7	144
Notional	2,174	19,500
Buy-protection credit derivative positions
Credit Derivatives [Line Items]
Carrying/Fair Value	(62)	(74)
Notional	$ 4,849	$ 33,111

Guarantee Arrangements, Pledg_5

Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Additional Information (Detail) - USD ($)	12 Months Ended			36 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2007
Guarantor Obligations [Line Items]
Deferred fees	$ 4,000,000	$ 3,000,000
Carrying value of swap	1,395,345,000,000	2,021,133,000,000
Estimate of reasonably possible loss	150,000,000
Pledged assets not separately reported, trading assets	1,773,000,000	1,265,000,000
Collateral accepted under security resale agreements, fair value	12,848,000,000	41,447,000,000
Collateral accepted under security repurchase agreements but not reported on the balance sheet that can be sold or repledged, fair value	12,848,000,000	41,047,000,000
Collateral accepted under security repurchase agreements that has been sold or repledged under repurchase agreements or to cover short sales	538,000,000	4,063,000,000
Obligation to Repurchase Receivables Sold
Guarantor Obligations [Line Items]
Estimated repurchase liability	3,000,000	3,000,000
Obligation to Repurchase Receivables Sold | Minimum
Guarantor Obligations [Line Items]
Estimate of reasonably possible loss	0
Obligation to Repurchase Receivables Sold | Maximum
Guarantor Obligations [Line Items]
Estimate of reasonably possible loss	25,000,000
Visa Class B Shares
Guarantor Obligations [Line Items]
Loss on Visa shares	3,000,000	9,000,000	$ 52,000,000
HSBC Securities
Guarantor Obligations [Line Items]
Whole loan securitization				$ 24,000,000,000
Securities available-for-sale ("AFS")
Guarantor Obligations [Line Items]
Securities pledged as collateral that can be sold or repledged by the secured party, fair value	2,410,000,000	2,077,000,000
Trading assets
Guarantor Obligations [Line Items]
Pledged assets not separately reported, trading assets	1,749,000,000	1,265,000,000
Other liabilities
Guarantor Obligations [Line Items]
Allowance for credit losses on unfunded standby letters of credit	14,000,000	32,000,000
Other liabilities | Standby Letters of Credit
Guarantor Obligations [Line Items]
Deferred fees	51,000,000	44,000,000
Swap
Guarantor Obligations [Line Items]
Carrying value of swap	$ 38,000,000	$ 67,000,000

Guarantee Arrangements, Pledg_6

Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Summary of Credit Ratings of Credit Risk Related Guarantees (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	$ 10,474	$ 28,045
Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	$ 2,174
Single name credit default swap | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Average Life (in years)	2 years 2 months 12 days
Credit Ratings of the Obligors	$ 1,719
Index credit derivatives | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Average Life (in years)	13 years 6 months
Credit Ratings of the Obligors	$ 455
Standby Letters of Credit
Credit Derivatives [Line Items]
Average Life (in years)	1 year 3 months 18 days
Credit Ratings of the Obligors	$ 8,300
Investment Grade
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	8,003
Investment Grade | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	1,525
Investment Grade | Single name credit default swap | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	1,125
Investment Grade | Index credit derivatives | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	400
Investment Grade | Standby Letters of Credit
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	6,478
Non-Investment Grade
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	2,471
Non-Investment Grade | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	649
Non-Investment Grade | Single name credit default swap | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	594
Non-Investment Grade | Index credit derivatives | Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	55
Non-Investment Grade | Standby Letters of Credit
Credit Derivatives [Line Items]
Credit Ratings of the Obligors	$ 1,822

Guarantee Arrangements, Pledg_7

Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Summary of Pledged Assets Included in Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Interest bearing deposits with banks	$ 563	$ 2,158
Trading assets	1,773	1,265
Securities available-for-sale	7,618	8,652
Securities held to maturity	599	1,076
Loans	17,777	18,146
Other assets	1,211	2,352
Total	$ 29,541	$ 33,649

Guarantee Arrangements and Pled

Guarantee Arrangements and Pledged Assets and Repurchase Agreements - Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Securities purchased under agreements to resell, Gross Amounts Recognized	$ 12,871	$ 41,382
Securities purchased under agreements to resell, Gross Amounts Offset in the Balance Sheet	2,357	5,636
Securities purchased under agreements to resell, Net amounts Presented in the Balance Sheet	10,514	35,746
Securities purchased under agreements to resell, Gross Amounts Not Offset in the Balance Sheet, Financial Instruments	10,464	35,746
Securities purchased under agreements to resell, Gross Amounts Not Offset in the Balance Sheet, Cash Collateral Receive / Pledged	50	0
Securities purchased under agreements to resell, Net amount	0	0
Securities sold under repurchase agreements, Gross Amounts Recognized	4,672	7,401
Securities sold under repurchase agreements, Gross Amounts Offset in the Balance Sheet	2,357	5,636
Securities sold under repurchase agreements, Net Amounts Presented in the Balance Sheet	2,315	1,765
Securities sold under repurchase agreements, Gross Amounts Not Offset in the Balance sheet, Financial Instruments	2,315	1,762
Securities sold under repurchase agreements, Gross Amounts Not Offset in the Balance Sheet, Cash Collateral Received / Pledged	0	0
Securities sold under repurchase agreements, Net amount	$ 0	$ 3

Guarantee Arrangements, Pledg_8

Guarantee Arrangements, Pledged Assets and Repurchase Agreements, Collateral Pledged and Remaining Contractual Maturity of Repurchase Agreements Accounted for as Secured Borrowings (Details) - U.S. Treasury, U.S. Government sponsored and U.S. Government agency securities - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	$ 4,672	$ 7,401
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	0	4,091
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	3,442	2,810
31 to 90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	1,151	500
91 Days to One Year
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	79	0
Greater Than One Year
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Collateral pledged and remaining contractual maturity of repurchase agreements accounted for as secured borrowings	$ 0	$ 0

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Recorded at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Netting, Assets		$ (11,991)	$ (25,537)
Netting Liabilities		(11,991)	(25,537)
Trading assets	[1]	24,043	27,284
Trading liabilities	[1]	3,023	5,397
Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		167	7,971
Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		15,795	6,043
Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		3,907	4,989
Trading liabilities		46	2,312
Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading liabilities		1,874	2,358
Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Trading assets		1,405	2,801
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		74,511	97,982
Netting, Assets		(14,788)	(29,616)
Net Balance, Assets		59,723	68,366
Gross Balance, Liabilities		28,125	49,380
Netting Liabilities		(13,287)	(28,914)
Net Balance, Liabilities		14,838	20,466
Fair Value, Recurring | Domestic Deposits | Domestic Deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2,749	4,155
Net Balance, Liabilities		2,749	4,155
Fair Value, Recurring | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,149	3,039
Net Balance, Liabilities		1,149	3,039
Fair Value, Recurring | Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		15,285	31,461
Netting Liabilities		(13,287)	(28,914)
Net Balance, Liabilities		1,998	2,547
Fair Value, Recurring | Derivatives | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,899	6,625
Netting Liabilities		0	0
Net Balance, Liabilities		1,899	6,625
Fair Value, Recurring | Derivatives | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11,126	18,603
Netting Liabilities		0	0
Net Balance, Liabilities		11,126	18,603
Fair Value, Recurring | Derivatives | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,361	4,291
Netting Liabilities		0	0
Net Balance, Liabilities		1,361	4,291
Fair Value, Recurring | Derivatives | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		779	1,578
Netting Liabilities		0	0
Net Balance, Liabilities		779	1,578
Fair Value, Recurring | Derivatives | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		82	297
Netting Liabilities		0	0
Net Balance, Liabilities		82	297
Fair Value, Recurring | Derivatives | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		38	67
Netting Liabilities		0	0
Net Balance, Liabilities		38	67
Fair Value, Recurring | Derivatives | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Netting Liabilities		(13,287)	(28,914)
Net Balance, Liabilities		(13,287)	(28,914)
Fair Value, Recurring | Long-term debt | Fixed rate long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		8,942	10,725
Net Balance, Liabilities		8,942	10,725
Fair Value, Recurring | Trading assets, excluding derivatives: | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,769	5,337
Net Balance, Assets		2,769	5,337
Fair Value, Recurring | Trading assets, excluding derivatives: | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		167	7,971
Net Balance, Assets		167	7,971
Fair Value, Recurring | Trading assets, excluding derivatives: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		15,795	6,043
Net Balance, Assets		15,795	6,043
Fair Value, Recurring | Trading assets, excluding derivatives: | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		3,907	4,989
Net Balance, Assets		3,907	4,989
Fair Value, Recurring | Trading assets, excluding derivatives: | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			63
Net Balance, Assets			63
Fair Value, Recurring | Trading assets, excluding derivatives: | Residential mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			15
Net Balance, Assets			15
Fair Value, Recurring | Trading assets, excluding derivatives: | Student loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			65
Net Balance, Assets			65
Fair Value, Recurring | Derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		16,229	32,468
Netting, Assets		(14,788)	(29,616)
Net Balance, Assets		1,441	2,852
Fair Value, Recurring | Derivative | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,848	6,687
Netting, Assets		0	0
Net Balance, Assets		1,848	6,687
Fair Value, Recurring | Derivative | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		11,350	18,467
Netting, Assets		0	0
Net Balance, Assets		11,350	18,467
Fair Value, Recurring | Derivative | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,058	5,616
Netting, Assets		0	0
Net Balance, Assets		2,058	5,616
Fair Value, Recurring | Derivative | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		940	1,323
Netting, Assets		0	0
Net Balance, Assets		940	1,323
Fair Value, Recurring | Derivative | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		28	367
Netting, Assets		0	0
Net Balance, Assets		28	367
Fair Value, Recurring | Derivative | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	8
Netting, Assets		0	0
Net Balance, Assets		5	8
Fair Value, Recurring | Derivative | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Netting, Assets		(14,788)	(29,616)
Net Balance, Assets		(14,788)	(29,616)
Fair Value, Recurring | Securities available-for-sale ("AFS") | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		32,866	35,408
Net Balance, Assets		32,866	35,408
Fair Value, Recurring | Securities available-for-sale ("AFS") | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,312	5,133
Net Balance, Assets		2,312	5,133
Fair Value, Recurring | Securities available-for-sale ("AFS") | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		19	27
Net Balance, Assets		19	27
Fair Value, Recurring | Securities available-for-sale ("AFS") | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		101	104
Net Balance, Assets		101	104
Fair Value, Recurring | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		48	36
Net Balance, Assets		48	36
Fair Value, Recurring | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			32
Net Balance, Assets			32
Fair Value, Recurring | Other assets: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		144	149
Net Balance, Assets		144	149
Fair Value, Recurring | Other assets: | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		16	7
Net Balance, Assets		16	7
Fair Value, Recurring | Other assets: | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		138	135
Net Balance, Assets		138	135
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		31,296	43,978
Gross Balance, Liabilities		1,113	764
Fair Value, Recurring | Level 1 | Domestic Deposits | Domestic Deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,103	727
Fair Value, Recurring | Level 1 | Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		10	37
Fair Value, Recurring | Level 1 | Derivatives | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		10	9
Fair Value, Recurring | Level 1 | Derivatives | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	28
Fair Value, Recurring | Level 1 | Derivatives | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Derivatives | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Long-term debt | Fixed rate long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,337	5,145
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		134	7,953
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		15,795	6,043
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Residential mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 1 | Trading assets, excluding derivatives: | Student loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 1 | Derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		12	15
Fair Value, Recurring | Level 1 | Derivative | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		8	15
Fair Value, Recurring | Level 1 | Derivative | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		4	0
Fair Value, Recurring | Level 1 | Derivative | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Derivative | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Securities available-for-sale ("AFS") | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		10,817	22,880
Fair Value, Recurring | Level 1 | Securities available-for-sale ("AFS") | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		2,201	1,942
Fair Value, Recurring | Level 1 | Securities available-for-sale ("AFS") | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Securities available-for-sale ("AFS") | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 1 | Other assets: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets: | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 1 | Other assets: | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		42,722	53,024
Gross Balance, Liabilities		24,414	46,996
Fair Value, Recurring | Level 2 | Domestic Deposits | Domestic Deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2,214	3,509
Fair Value, Recurring | Level 2 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		46	2,312
Fair Value, Recurring | Level 2 | Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		15,065	30,898
Fair Value, Recurring | Level 2 | Derivatives | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,888	6,615
Fair Value, Recurring | Level 2 | Derivatives | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		11,124	18,597
Fair Value, Recurring | Level 2 | Derivatives | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,194	3,845
Fair Value, Recurring | Level 2 | Derivatives | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		779	1,550
Fair Value, Recurring | Level 2 | Derivatives | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		80	291
Fair Value, Recurring | Level 2 | Derivatives | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 2 | Derivatives | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 2 | Long-term debt | Fixed rate long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		7,089	10,277
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		432	192
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		33	18
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		3,907	4,989
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			63
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Residential mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 2 | Trading assets, excluding derivatives: | Student loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			65
Fair Value, Recurring | Level 2 | Derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		15,998	31,761
Fair Value, Recurring | Level 2 | Derivative | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,839	6,637
Fair Value, Recurring | Level 2 | Derivative | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		11,350	18,452
Fair Value, Recurring | Level 2 | Derivative | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1,845	5,051
Fair Value, Recurring | Level 2 | Derivative | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		936	1,323
Fair Value, Recurring | Level 2 | Derivative | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		28	298
Fair Value, Recurring | Level 2 | Derivative | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Derivative | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Securities available-for-sale ("AFS") | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		22,049	12,528
Fair Value, Recurring | Level 2 | Securities available-for-sale ("AFS") | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		111	3,191
Fair Value, Recurring | Level 2 | Securities available-for-sale ("AFS") | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Securities available-for-sale ("AFS") | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		48	36
Fair Value, Recurring | Level 2 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			32
Fair Value, Recurring | Level 2 | Other assets: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		144	149
Fair Value, Recurring | Level 2 | Other assets: | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 2 | Other assets: | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		355	845
Gross Balance, Liabilities		2,598	1,620
Fair Value, Recurring | Level 3 | Domestic Deposits | Domestic Deposits
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		535	646
Fair Value, Recurring | Level 3 | Trading liabilities, excluding derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		210	526
Fair Value, Recurring | Level 3 | Derivatives | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1	1
Fair Value, Recurring | Level 3 | Derivatives | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2	6
Fair Value, Recurring | Level 3 | Derivatives | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		167	446
Fair Value, Recurring | Level 3 | Derivatives | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Derivatives | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		2	6
Fair Value, Recurring | Level 3 | Derivatives | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		38	67
Fair Value, Recurring | Level 3 | Derivatives | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		0	0
Fair Value, Recurring | Level 3 | Long-term debt | Fixed rate long-term debt
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Liabilities		1,853	448
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Precious metals trading
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Collateralized debt obligations
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Residential mortgages
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			15
Fair Value, Recurring | Level 3 | Trading assets, excluding derivatives: | Student loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 3 | Derivative
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		219	692
Fair Value, Recurring | Level 3 | Derivative | Interest rate contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		1	35
Fair Value, Recurring | Level 3 | Derivative | Foreign exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	15
Fair Value, Recurring | Level 3 | Derivative | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		213	565
Fair Value, Recurring | Level 3 | Derivative | Precious metals contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Derivative | Credit contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	69
Fair Value, Recurring | Level 3 | Derivative | Other Contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		5	8
Fair Value, Recurring | Level 3 | Derivative | Derivatives netting
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Securities available-for-sale ("AFS") | U.S. Treasury, U.S. Government agencies and sponsored enterprises
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Securities available-for-sale ("AFS") | Debt securities issued by foreign entities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Securities available-for-sale ("AFS") | Home equity
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		19	27
Fair Value, Recurring | Level 3 | Securities available-for-sale ("AFS") | Other
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		101	104
Fair Value, Recurring | Level 3 | Loans | Loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Loans | Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets			0
Fair Value, Recurring | Level 3 | Other assets: | Equity securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		0	0
Fair Value, Recurring | Level 3 | Other assets: | Mortgage servicing rights
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		16	7
Fair Value, Recurring | Level 3 | Other assets: | Equity securities measured at net asset value
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Gross Balance, Assets		$ 0	$ 0
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Fair Value Measurements - Chang

Fair Value Measurements - Changes in Fair Value of Level 3 Assets and Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	$ 74,511	$ 97,982
Gross Balance, Liabilities	28,125	49,380
Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	15,285	31,461
Interest rate contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	1,899	6,625
Foreign exchange contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	11,126	18,603
Equity contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	1,361	4,291
Credit contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	82	297
Other Contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	38	67
Derivative
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	692
Total assets, ending balance	219	692
Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total liabilities, beginning balance	(526)
Total liabilities, ending balance	(210)	(526)
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	319	707
Assets, Total Realized/Unrealized Gains (Losses) Included in Earnings	(317)	132
Assets, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)	(3)	(9)
Assets, Purchases	0	0
Assets, Issuances	9	5
Assets, Settlements	104	(521)
Assets, Transfers Into Level 3	(27)	3
Assets Transfers out of Level 3	60	2
Total assets, ending balance	145	319
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	8	158
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	(3)	(9)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total liabilities, beginning balance	(1,094)	(1,128)
Total Realized/Unrealized Gains (Losses) Included in Earnings	(51)	(27)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	2	(2)
Purchases	0	0
Issuances	(1,732)	(305)
Settlements	592	284
Transfers Into Level 3	(251)	(1)
Transfers Out of Level 3	146	85
Total liabilities, ending balance	(2,388)	(1,094)
Current Period Unrealized Gains (Losses) Still Held Included in Earnings	(29)	(50)
Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	2	(2)
Level 3 | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	355	845
Gross Balance, Liabilities	2,598	1,620
Level 3 | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	210	526
Level 3 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivatives, net, Beginning Balance	34	10
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Earnings	(34)	23
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Derivatives, net, Purchases	0	0
Derivatives, net, Issuances	0	0
Derivatives, net, Settlements	0	0
Derivatives, net, Transfers into Level 3	0	1
Derivatives, net, Transfers out of Level 3	0	0
Derivatives, net, Ending Balance	0	34
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	(4)	23
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income (Loss)	0	0
Level 3 | Interest rate contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	1	1
Level 3 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivatives, net, Beginning Balance	9	(1)
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Earnings	(11)	(1)
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Derivatives, net, Purchases	0	0
Derivatives, net, Issuances	0	0
Derivatives, net, Settlements	0	0
Derivatives, net, Transfers into Level 3	0	11
Derivatives, net, Transfers out of Level 3	0	0
Derivatives, net, Ending Balance	(2)	9
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	0	(1)
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income (Loss)	0	0
Level 3 | Foreign exchange contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	2	6
Level 3 | Equity contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivatives, net, Beginning Balance	119	72
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Earnings	(214)	129
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Derivatives, net, Purchases	0	0
Derivatives, net, Issuances	0	0
Derivatives, net, Settlements	84	(47)
Derivatives, net, Transfers into Level 3	(27)	(37)
Derivatives, net, Transfers out of Level 3	84	2
Derivatives, net, Ending Balance	46	119
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	14	147
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income (Loss)	0	0
Level 3 | Equity contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	167	446
Level 3 | Credit contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivatives, net, Beginning Balance	63	59
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Earnings	(65)	7
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Derivatives, net, Purchases	0	0
Derivatives, net, Issuances	0	0
Derivatives, net, Settlements	0	(3)
Derivatives, net, Transfers into Level 3	0	0
Derivatives, net, Transfers out of Level 3	0	0
Derivatives, net, Ending Balance	(2)	63
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	(2)	(7)
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income (Loss)	0	0
Level 3 | Credit contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	2	6
Level 3 | Other Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Derivatives, net, Beginning Balance	(59)	(75)
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Earnings	(2)	(9)
Derivatives, net, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Derivatives, net, Purchases	0	0
Derivatives, net, Issuances	0	0
Derivatives, net, Settlements	28	25
Derivatives, net, Transfers into Level 3	0	0
Derivatives, net, Transfers out of Level 3	0	0
Derivatives, net, Ending Balance	(33)	(59)
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	0	0
Derivatives, net, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income (Loss)	0	0
Level 3 | Other Contracts | Fair Value, Recurring | Derivatives
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Liabilities	38	67
Mortgage servicing rights | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	7	4
Assets, Total Realized/Unrealized Gains (Losses) Included in Earnings	0	(2)
Assets, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)	0	0
Assets, Purchases	0	0
Assets, Issuances	9	5
Assets, Settlements	0	0
Assets, Transfers Into Level 3	0	0
Assets Transfers out of Level 3	0	0
Total assets, ending balance	16	7
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	0	(2)
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	0	0
Derivative | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	16,229	32,468
Derivative | Interest rate contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	1,848	6,687
Derivative | Foreign exchange contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	11,350	18,467
Derivative | Equity contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	2,058	5,616
Derivative | Credit contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	28	367
Derivative | Other Contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	5	8
Derivative | Level 3 | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	219	692
Derivative | Level 3 | Interest rate contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	1	35
Derivative | Level 3 | Foreign exchange contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	0	15
Derivative | Level 3 | Equity contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	213	565
Derivative | Level 3 | Credit contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	0	69
Derivative | Level 3 | Other Contracts | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	5	8
Asset-backed securities collateralized by residential mortgages | Trading assets, excluding derivatives: | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets		15
Asset-backed securities collateralized by residential mortgages | Trading assets, excluding derivatives: | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	15	17
Assets, Total Realized/Unrealized Gains (Losses) Included in Earnings	9	(2)
Assets, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)	0	0
Assets, Purchases	0	0
Assets, Issuances	0	0
Assets, Settlements	0	0
Assets, Transfers Into Level 3	0	0
Assets Transfers out of Level 3	(24)	0
Total assets, ending balance	0	15
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	0	(2)
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	0	0
Asset-backed securities collateralized by residential mortgages | Trading assets, excluding derivatives: | Level 3 | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets		15
Corporate and other domestic debt securities | Trading assets, excluding derivatives: | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	0	510
Assets, Total Realized/Unrealized Gains (Losses) Included in Earnings		(13)
Assets, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)		0
Assets, Purchases		0
Assets, Issuances		0
Assets, Settlements		(497)
Assets, Transfers Into Level 3		0
Assets Transfers out of Level 3		0
Total assets, ending balance		0
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Earnings		0
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income		0
Other | Securities available-for-sale ("AFS") | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	101	104
Other | Securities available-for-sale ("AFS") | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total assets, beginning balance	131	111
Assets, Total Realized/Unrealized Gains (Losses) Included in Earnings	0	0
Assets, Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss)	(3)	(9)
Assets, Purchases	0	0
Assets, Issuances	0	0
Assets, Settlements	(8)	1
Assets, Transfers Into Level 3	0	28
Assets Transfers out of Level 3	0	0
Total assets, ending balance	120	131
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Earnings	0	0
Assets, Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	(3)	(9)
Other | Securities available-for-sale ("AFS") | Level 3 | Fair Value, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gross Balance, Assets	101	104
Domestic Deposits | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total liabilities, beginning balance	(646)	(774)
Total Realized/Unrealized Gains (Losses) Included in Earnings	(16)	(15)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	2	(2)
Purchases	0	0
Issuances	0	(43)
Settlements	184	125
Transfers Into Level 3	(151)	0
Transfers Out of Level 3	92	63
Total liabilities, ending balance	(535)	(646)
Current Period Unrealized Gains (Losses) Still Held Included in Earnings	(16)	(20)
Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	2	(2)
Fixed rate long-term debt | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total liabilities, beginning balance	(448)	(354)
Total Realized/Unrealized Gains (Losses) Included in Earnings	(35)	(12)
Total Realized/Unrealized Gains (Losses) Included in Other Comprehensive Income	0	0
Purchases	0	0
Issuances	(1,732)	(262)
Settlements	408	159
Transfers Into Level 3	(100)	(1)
Transfers Out of Level 3	54	22
Total liabilities, ending balance	(1,853)	(448)
Current Period Unrealized Gains (Losses) Still Held Included in Earnings	(13)	(30)
Current Period Unrealized Gains (Losses) Still Held Included in Other Comprehensive Income	$ 0	$ 0

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative Information about Recurring Fair Value Measurement of Assets and Liabilities Classified as Level 3 (Detail) $ in Millions		Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Mortgage servicing rights		$ 16	$ 7
Domestic deposits		(535)	(646)
Long-term debt	[1]	(17,236)	(19,979)
Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Long-term debt		(1,853)	(448)
Asset-backed securities
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Asset-backed securities available-for-sale		120	131
Residential mortgages
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Asset-backed securities available-for-sale			15
Interest rate contracts
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Derivative assets (liability		0	34
Foreign exchange contracts
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Derivative assets (liability		(2)	9
Equity contracts
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Derivative assets (liability		46	119
Credit contracts
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Derivative assets (liability		(2)	63
Other Contracts
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Derivative assets (liability		$ (33)	$ (59)
Probability to fund for rate lock commitments | Interest rate contracts | Recurring | Minimum | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.36	0.41
Probability to fund for rate lock commitments | Interest rate contracts | Recurring | Maximum | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.99	1
Probability to fund for rate lock commitments | Interest rate contracts | Recurring | Weighted Average | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.83	0.78
Interest rate yield curve | Interest rate contracts | Recurring | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08
Interest rate yield curve | Interest rate contracts | Recurring | Minimum | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.04
Interest rate yield curve | Interest rate contracts | Recurring | Maximum | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.07
Interest rate yield curve | Interest rate contracts | Recurring | Weighted Average | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.06
Implied volatility of currency pairs | Recurring | Minimum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.09
Implied volatility of currency pairs | Recurring | Minimum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0	0.09
Implied volatility of currency pairs | Recurring | Maximum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.11
Implied volatility of currency pairs | Recurring | Maximum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.09	0.11
Implied volatility of currency pairs | Recurring | Weighted Average | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.10
Implied volatility of currency pairs | Recurring | Weighted Average | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.06	0.10
Implied volatility of currency pairs | Foreign exchange contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0	0.09
Implied volatility of currency pairs | Foreign exchange contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.09	0.11
Implied volatility of currency pairs | Foreign exchange contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.06	0.10
Cross-currency basis | Foreign exchange contracts | Recurring | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		(0.0086)
Cross-currency basis | Foreign exchange contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			(0.0009)
Cross-currency basis | Foreign exchange contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.0040
Cross-currency basis | Foreign exchange contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.0024
Equity / Equity Index volatility | Recurring | Minimum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08	0
Equity / Equity Index volatility | Recurring | Minimum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08	0
Equity / Equity Index volatility | Recurring | Maximum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.21	0.42
Equity / Equity Index volatility | Recurring | Maximum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.71	0.67
Equity / Equity Index volatility | Recurring | Weighted Average | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.15	0.15
Equity / Equity Index volatility | Recurring | Weighted Average | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.31	0.23
Equity / Equity Index volatility | Equity contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08	0
Equity / Equity Index volatility | Equity contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.85	0.67
Equity / Equity Index volatility | Equity contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.40	0.27
Equity / Equity and Equity / Index correlation | Recurring | Minimum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.49	0.43
Equity / Equity and Equity / Index correlation | Recurring | Minimum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.44	0.32
Equity / Equity and Equity / Index correlation | Recurring | Maximum | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.85	0.47
Equity / Equity and Equity / Index correlation | Recurring | Maximum | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.98	0.62
Equity / Equity and Equity / Index correlation | Recurring | Weighted Average | Option adjusted discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.62	0.45
Equity / Equity and Equity / Index correlation | Recurring | Weighted Average | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.82	0.52
Equity / Equity and Equity / Index correlation | Equity contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.44	0.17
Equity / Equity and Equity / Index correlation | Equity contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.98	0.62
Equity / Equity and Equity / Index correlation | Equity contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.81	0.30
Equity dividend yields and forward price | Equity contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		(0.04)	(0.01)
Equity dividend yields and forward price | Equity contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.01	0
Equity dividend yields and forward price | Equity contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0	0
Credit default swap spreads | Recurring | Option adjusted discounted cash flows | Structured notes
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.0798
Credit default swap spreads | Credit contracts | Recurring | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.0150
Credit default swap spreads | Credit contracts | Recurring | Minimum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.0076
Credit default swap spreads | Credit contracts | Recurring | Maximum | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.0325
Credit default swap spreads | Credit contracts | Recurring | Weighted Average | Option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.0234
Conversion rate | Other Contracts | Recurring | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		1.6	1.6
Expected duration | Other Contracts | Recurring | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		1	2
Market assumptions related to yields for comparable instruments | Asset-backed securities | Recurring | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.04
Market assumptions related to yields for comparable instruments | Asset-backed securities | Recurring | Minimum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.03
Market assumptions related to yields for comparable instruments | Asset-backed securities | Recurring | Maximum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.04
Market assumptions related to yields for comparable instruments | Asset-backed securities | Recurring | Weighted Average | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.03
Constant prepayment rates | Recurring | Minimum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.10	0.17
Constant prepayment rates | Recurring | Maximum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.16	0.26
Constant prepayment rates | Recurring | Weighted Average | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.12	0.19
Constant prepayment rates | Residential mortgages | Recurring | Broker quotes or consensus pricing and, where applicable, discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.10
Discount rate | Recurring | Minimum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08	0.09
Discount rate | Recurring | Maximum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.13	0.10
Discount rate | Recurring | Weighted Average | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		0.08	0.09
Estimated annualized costs to service | Recurring | Minimum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		72	73
Estimated annualized costs to service | Recurring | Maximum | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		85	157
Estimated annualized costs to service | Recurring | Weighted Average | Discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs		75	76
Conditional default rates | Residential mortgages | Recurring | Broker quotes or consensus pricing and, where applicable, discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.05
Loss severity rates | Residential mortgages | Recurring | Broker quotes or consensus pricing and, where applicable, discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.65
Discount margin | Residential mortgages | Recurring | Broker quotes or consensus pricing and, where applicable, discounted cash flows
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.0500
Likelihood of transaction being executed | Interest rate contracts | Recurring | Market comparable adjusted for probability to fund and, where applicable, discounted cash flows or option pricing model
Fair Value Measurements, Recurring, Valuation Techniques [Line Items]
Range of Inputs			0.90
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Unfunded commitments, equity securities measured at net asset value	$ 29	$ 33
Revaluation period	90 days
Deferred fees	$ 4	3
Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Transfers Out of Level 3	146	85
Assets Transfers out of Level 3	60	2
Fair Value Liability, Transfers Into Level 3	251	1
Assets, Transfers Into Level 3	(27)	3
Level 3 | Equity contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Derivatives, net, Transfers out of Level 3	84	2
Derivatives, net, Transfers into Level 3	27	37
Unfunded Loan Commitment
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Deferred fees	151	137
Deposits | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Transfers Out of Level 3	92	63
Fair Value Liability, Transfers Into Level 3	151	0
Fixed rate long-term debt | Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Transfers Out of Level 3	54	22
Fair Value Liability, Transfers Into Level 3	100	1
Residential mortgages | Level 3 | Trading assets, excluding derivatives:
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets Transfers out of Level 3	(24)	0
Assets, Transfers Into Level 3	0	0
Other | Level 3 | Available-for-sale securities
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets Transfers out of Level 3	0	0
Assets, Transfers Into Level 3	$ 0	$ 28

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets and Liabilities Recorded as Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	$ (62)	$ (1,048)
Consumer loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	(12)	0
Consumer loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	10	18
Commercial loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	(17)	(23)
Commercial Loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	60	(169)
Real Estate Owned
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)		2
Goodwill
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)		(784)
Leases
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total Gains (Losses)	(103)	(92)
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	2,202	658
Fair Value, Nonrecurring | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	201	385
Fair Value, Nonrecurring | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	2,001	273
Fair Value, Nonrecurring | Consumer loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	1,766	4
Fair Value, Nonrecurring | Consumer loans held for sale | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Consumer loans held for sale | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	24	4
Fair Value, Nonrecurring | Consumer loans held for sale | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	1,742	0
Fair Value, Nonrecurring | Consumer loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	102	312
Fair Value, Nonrecurring | Consumer loans | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Consumer loans | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	102	312
Fair Value, Nonrecurring | Consumer loans | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Commercial loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	143	68
Fair Value, Nonrecurring | Commercial loans held for sale | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Commercial loans held for sale | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	75	68
Fair Value, Nonrecurring | Commercial loans held for sale | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	68	0
Fair Value, Nonrecurring | Commercial Loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	186	270
Fair Value, Nonrecurring | Commercial Loans | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Commercial Loans | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Commercial Loans | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	186	270
Fair Value, Nonrecurring | Real Estate Owned
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		1
Fair Value, Nonrecurring | Real Estate Owned | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Real Estate Owned | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		1
Fair Value, Nonrecurring | Real Estate Owned | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Goodwill
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Goodwill | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Goodwill | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Goodwill | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		0
Fair Value, Nonrecurring | Leases
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	5	3
Properties held for sale	5
Fair Value, Nonrecurring | Leases | Level 1
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Leases | Level 2
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	0	0
Fair Value, Nonrecurring | Leases | Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	$ 5	3
Wealth and Personal Banking | Fair Value, Nonrecurring | Goodwill
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis		$ 0

Fair Value Measurements - Qua_2

Fair Value Measurements - Quantitative Information about Nonrecurring Fair Value Measurement of Assets and Liabilities Classified as Level 3 (Detail) - Fair Value, Nonrecurring $ in Millions	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	$ 2,202	$ 658
Consumer loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	1,766	4
Commercial loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	143	68
Commercial Loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	186	270
Level 3
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	2,001	273
Level 3 | Consumer loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	1,742	0
Level 3 | Commercial loans held for sale
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	68	0
Level 3 | Commercial Loans
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Total assets at fair value on a non-recurring basis	$ 186	$ 270
Adjusted market price | Level 3 | Consumer loans held for sale | Minimum | Market comparables and internal assumptions
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.10
Adjusted market price | Level 3 | Consumer loans held for sale | Maximum | Market comparables and internal assumptions
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	1
Adjusted market price | Level 3 | Consumer loans held for sale | Weighted Average | Market comparables and internal assumptions
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.98
Adjusted market price | Level 3 | Commercial loans held for sale | Market comparables and internal assumptions
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.94
Loss severity rates | Level 3 | Commercial Loans | Minimum | Valuation of third party appraisal on underlying collateral
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.02	0
Loss severity rates | Level 3 | Commercial Loans | Maximum | Valuation of third party appraisal on underlying collateral
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.76	0.76
Loss severity rates | Level 3 | Commercial Loans | Weighted Average | Valuation of third party appraisal on underlying collateral
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis [Line Items]
Range of Inputs	0.23	0.35

Fair Value Measurements - Add_2

Fair Value Measurements - Additional Information Relating To Asset-Backed Securities and Collateralized Debt Obligations (Detail) - Level 3 $ in Millions	Dec. 31, 2021USD ($)
Other | BBB - B
Fair Value Of Other Financial Instrument [Line Items]
Trading asset-backed securities and related collateral	$ 101
Available-for-sale securities
Fair Value Of Other Financial Instrument [Line Items]
Trading asset-backed securities and related collateral	120
Alt A | Home equity | AAA - A
Fair Value Of Other Financial Instrument [Line Items]
Trading asset-backed securities and related collateral	$ 19

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Value and Estimated Fair Value of Financial Instruments (Detail) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Federal funds sold and securities purchased under agreements to resell	[1]	$ 10,514	$ 35,746
Loans, net of allowance for credit losses		55,417	61,073	$ 67,916
Loans held for sale	[1]	4,217	337
Deposits		143,032	145,150	$ 119,693
Long-term debt	[1]	17,236	19,979
Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans held for sale		461	129
Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans held for sale		3,756	208
Level 1
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Short-term financial assets, net of allowance for credit losses		954	1,302
Federal funds sold and securities purchased under agreements to resell		0	0
Securities held-to-maturity, net of allowance for credit losses		0	0
Short-term financial liabilities		0	0
Deposits		0	0
Deposits held for sale		0
Long-term debt		0	0
Level 1 | Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		0	0
Loans held for sale		0	0
Level 1 | Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		0	0
Loans held for sale		0	0
Level 2
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Short-term financial assets, net of allowance for credit losses		47,400	14,353
Federal funds sold and securities purchased under agreements to resell		10,514	35,746
Securities held-to-maturity, net of allowance for credit losses		5,359	9,369
Short-term financial liabilities		6,338	4,952
Deposits		131,533	141,001
Deposits held for sale		8,750
Long-term debt		8,861	9,720
Level 2 | Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		0	0
Loans held for sale		359	93
Level 2 | Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		0	0
Loans held for sale		77	217
Level 3
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Short-term financial assets, net of allowance for credit losses		50	12
Federal funds sold and securities purchased under agreements to resell		0	0
Securities held-to-maturity, net of allowance for credit losses		0	0
Short-term financial liabilities		51	13
Deposits		0	0
Deposits held for sale		0
Long-term debt		0	0
Level 3 | Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		39,862	41,417
Loans held for sale		84	0
Level 3 | Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		15,672	19,865
Loans held for sale		3,732	0
Carrying Value
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Short-term financial assets, net of allowance for credit losses		48,404	15,667
Federal funds sold and securities purchased under agreements to resell		10,514	35,746
Securities held-to-maturity, net of allowance for credit losses		5,203	8,981
Short-term financial liabilities		6,389	4,965
Deposits		131,533	140,995
Deposits held for sale		8,750
Long-term debt		8,294	9,254
Carrying Value | Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		39,376	40,785
Loans held for sale		438	93
Carrying Value | Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		16,041	20,256
Loans held for sale		3,731	208
Fair Value
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Short-term financial assets, net of allowance for credit losses		48,404	15,667
Federal funds sold and securities purchased under agreements to resell		10,514	35,746
Securities held-to-maturity, net of allowance for credit losses		5,359	9,369
Short-term financial liabilities		6,389	4,965
Deposits		131,533	141,001
Deposits held for sale		8,750
Long-term debt		8,861	9,720
Fair Value | Commercial loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		39,862	41,417
Loans held for sale		443	93
Fair Value | Consumer loans:
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]
Loans, net of allowance for credit losses		15,672	19,865
Loans held for sale		$ 3,809	$ 217
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Litigation and Regulatory Mat_2

Litigation and Regulatory Matters - Additional Information (Details)	1 Months Ended			12 Months Ended		36 Months Ended
	Jun. 30, 2020financial_institution	Mar. 31, 2018USD ($)	Jan. 31, 2018transaction	Dec. 31, 2014USD ($)trust	Dec. 31, 2013USD ($)	Dec. 31, 2007USD ($)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Loss Contingencies [Line Items]
Estimate of reasonably possible loss							$ 150,000,000
FX DPA | HSBC Holdings plc
Loss Contingencies [Line Items]
Litigation settlement agreement, compliance period			3 years
Number of Transactions Investigated | transaction			2
South African Competition Tribunal, Revised Complaint
Loss Contingencies [Line Items]
Number of financial institutions | financial_institution	28
Mortgage Securitization Activity Related Litigation | HSBC Securities
Loss Contingencies [Line Items]
Mortgage securitization loan purchased and sold						$ 24,000,000,000
Mortgage securitization outstanding loan purchase and sold							$ 2,700,000,000	$ 3,100,000,000
Deutsche Bank Alleged Breach of Representation
Loss Contingencies [Line Items]
Damages sought					$ 508,000,000
Mortgage Securitizationn Pool Trust Litigation
Loss Contingencies [Line Items]
Damages sought				$ 38,000,000,000
Number of identified trusts | trust				280
Rigoberto Vasquez and Eva Garcia et al v. Hong Kong and Shanghai Banking Corporation Ltd., HSBC Bank USA, N.A., et al.
Loss Contingencies [Line Items]
Damages sought		$ 37,000,000

Financial Statements of HSBC _3

Financial Statements of HSBC USA Inc. (Parent) Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Investment in subsidiaries:
Other assets	[1]	$ 5,439		$ 6,084
Total assets		189,232	[1]	196,434	[1]	$ 175,375
Liabilities:
Interest, taxes and other liabilities	[1]	2,411		2,665
Total liabilities	[1]	172,192		178,143
Total equity		17,040		18,291		$ 18,256
Total liabilities and equity		189,232		196,434
HSBC USA
Assets:
Securities held-to-maturity, net of allowance for credit losses of less than $1 million at both December 31, 2021 and 2020 (fair value of $1 million and $2 million at December 31, 2021 and 2020, respectively)		1		2
Receivables and balances due from subsidiaries		12,944		14,585
Receivables from other HSBC affiliates		2,623		1,276
Investment in subsidiaries:
Banking		20,672		21,897
Other		75		12
Other assets		153		182
Total assets		36,468		37,954
Liabilities:
Interest, taxes and other liabilities		48		85
Payables due to subsidiaries		72		4
Payables due to other HSBC affiliates		65		32
Short-term borrowings		3,683		2,998
Short-term borrowings due to subsidiaries		1,500		3,000
Long-term debt		8,561		10,695
Long-term debt due to other HSBC affiliates		5,499		2,849
Total liabilities		19,428		19,663
Total equity		17,040		18,291
Total liabilities and equity		$ 36,468		$ 37,954
[1]	The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at December 31, 2021 and 2020. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 27, "Variable Interest Entities," for additional information. At December 31, 2021 2020 (in millions) Assets Loans $ 46 $ 10 Other assets 55 79 Total assets $ 101 $ 89 Liabilities Interest, taxes and other liabilities $ 9 $ 10 Total liabilities $ 9 $ 10

Financial Statements of HSBC _4

Financial Statements of HSBC USA Inc. (Parent) Balance Sheet (Phantom) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Fair Value	$ 5,359	$ 9,369
2022	2,930
2023	1,593
2024	2,014
2025	4,474
2026	631
Thereafter	5,594
HSBC USA
Condensed Financial Statements, Captions [Line Items]
Securities held-to-maturity, allowance for credit losses	1	1
Fair Value	1	$ 2
2022	2,900
2023	1,600
2024	2,000
2025	4,500
2026	600
Thereafter	$ 2,500

Financial Statements of HSBC _5

Financial Statements of HSBC USA Inc. (Parent) Statement of Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income:
Total income	$ 3,890	$ 2,899	$ 3,771
Expenses:
Other interest expense	11	16	35
Provision for credit losses	(437)	736	195
Income tax expense (benefit)	224	(42)	157
Net income (loss)	688	(940)	113
Other comprehensive income (loss)	(858)	956	87
Comprehensive income (loss)	(170)	16	200
HSBC USA
Income:
Dividends from banking subsidiaries	102	121	138
Interest from subsidiaries	28	101	350
Interest from other HSBC affiliates	23	43	91
Other income from subsidiaries	0	0	2
Other income from other HSBC Affiliates	1,027	552	1,645
Other income (loss)	(1,023)	(544)	(1,690)
Total income	157	273	536
Expenses:
Interest to subsidiaries	16	6	0
Interest to other HSBC Affiliates	128	115	140
Other interest expense	40	228	549
Provision for credit losses	0	(1)	0
Other expenses with subsidiaries	19	15	12
Other expenses	1	3	5
Total expenses	204	366	706
Income (loss) before income tax	(47)	(93)	(170)
Income tax expense (benefit)	(33)	(50)	(78)
Loss before equity in undistributed income (loss) of subsidiaries	(14)	(43)	(92)
Equity in undistributed income (loss) of subsidiaries	702	(897)	205
Net income (loss)	688	(940)	113
Other comprehensive income (loss)	(858)	956	87
Comprehensive income (loss)	$ (170)	$ 16	$ 200

Financial Statements of HSBC _6

Financial Statements of HSBC USA Inc. (Parent) Statement of Cash Flows (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Net income (loss)		$ 688		$ (940)		$ 113
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		22		34		43
Net change in other assets and liabilities		172		(839)		1,846
Net cash provided by (used in) operating activities		1,820		3,282		(4,259)
Proceeds from Sale and Maturity of Held-to-maturity Securities		1		0		0
Cash flows from investing activities
Other, net		103		(248)		119
Net cash provided by (used in) investing activities		35,072		(10,805)		(8,429)
Cash flows from financing activities
Net change in short-term borrowings		1,386		1,293		(535)
Issuance of long-term debt		7,711		8,487		4,686
Repayment of long-term debt		(10,044)		(10,427)		(10,705)
Return of capital to parent		(1,000)		0		(2,400)
Other increases (decreases) in capital surplus		(4)		10		0
Dividends paid		(77)		(77)		(77)
Net cash provided by (used in) financing activities		(4,135)		19,396		(744)
Net change in cash and due from banks and interest bearing deposits with banks		32,757		11,873		(13,432)
Cash and due from banks and interest bearing deposits with banks at beginning of period		15,655	[1]	3,782	[1]	17,214
Cash and due from banks and interest bearing deposits with banks at end of period	[1]	48,412		15,655		3,782
Cash paid for:
Interest		606		1,518		2,921
HSBC USA
Condensed Financial Statements, Captions [Line Items]
Net income (loss)		688		(940)		113
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		1		2		5
Net change in other assets and liabilities		(313)		256		1,463
Undistributed loss (gain) of subsidiaries		(702)		897		(205)
Other, net		(4)		(2)		4
Net cash provided by (used in) operating activities		(330)		213		1,380
Cash flows from investing activities
Net change in investments in and receivables due from subsidiaries		2,713		(552)		3,929
Net change in receivables from other HSBC affiliates		(1,345)		1,056		183
Other, net		0		0		1
Net cash provided by (used in) investing activities		1,369		504		4,113
Cash flows from financing activities
Net change in payables to other HSBC affiliates		13		(1)		4
Net change in short-term borrowings		(815)		3,522		(56)
Issuance of long-term debt		6,844		3,394		2,931
Repayment of long-term debt		(6,000)		(7,565)		(5,897)
Return of capital to parent		(1,000)		0		(2,400)
Other increases (decreases) in capital surplus		(4)		10		0
Dividends paid		(77)		(77)		(77)
Net cash provided by (used in) financing activities		(1,039)		(717)		(5,495)
Net change in cash and due from banks and interest bearing deposits with banks		0		0		(2)
Cash and due from banks and interest bearing deposits with banks at beginning of period		0		0		2
Cash and due from banks and interest bearing deposits with banks at end of period		0		0		0
Cash paid for:
Interest		$ 167		$ 379		$ 662
[1]	Includes $58 million of cash which is reported in other branch related assets held for sale on the consolidated balance sheet at December 31, 2021.