Financial liabilities designated at fair value - Summary of financial liabilities at fair value (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of financial liabilities [line items]
Financial liabilities	$ 2,882,187	$ 2,682,252
Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	158,456	138,727
Deposits by banks and customer accounts \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	27,491	23,773
Liabilities to customers under investment contracts \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	5,288	5,931
Debt securities in issue
Disclosure of financial liabilities [line items]
Financial liabilities	216,217	205,564
Debt securities in issue \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	116,502	99,706
Subordinated liabilities \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	9,175	9,317
HSBC Holdings
Disclosure of financial liabilities [line items]
Financial liabilities	153,859	138,096
HSBC Holdings \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	52,907	41,582
HSBC Holdings \| Debt securities in issue
Disclosure of financial liabilities [line items]
Financial liabilities	113,711	97,588
HSBC Holdings \| Debt securities in issue \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	44,687	33,268
HSBC Holdings \| Subordinated liabilities
Disclosure of financial liabilities [line items]
Financial liabilities	34,334	31,862
HSBC Holdings \| Subordinated liabilities \| Financial liabilities designated at fair value
Disclosure of financial liabilities [line items]
Financial liabilities	$ 8,220	$ 8,314

- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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