Credit Risk Derivatives And Guarantor Obligations, Maximum Exposure, Undiscounted

No definition available.

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Namespace Prefix:	hsbcusa_
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Balance Type:	credit
Period Type:	instant

- Definition

Average period covered by credit risk derivative contracts, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (a)(1)
-SubTopic 10
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

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Balance Type:	na
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- Definition

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

+ Details

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Balance Type:	credit
Period Type:	instant

- Details

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Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Summary of Credit Ratings of Credit Risk Related Guarantees (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	$ 4,459	$ 5,521
Total, Notional/Maximum Exposure to Loss	16,742	15,428
Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	$ 8,092	$ 6,827
Single name credit default swaps \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Average Life (in years)	1 year 2 months 12 days
Credit derivatives, Notional/Maximum Exposure to Loss	$ 2,646
Index credit derivatives \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Average Life (in years)	4 years 1 month 6 days
Credit derivatives, Notional/Maximum Exposure to Loss	$ 5,446
Standby Letters of Credit
Credit Derivatives [Line Items]
Average Life (in years)	10 months 24 days
Standby letters of credit, Notional/Maximum Exposure to Loss	$ 8,650
Investment Grade
Credit Derivatives [Line Items]
Total, Notional/Maximum Exposure to Loss	11,859
Investment Grade \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	5,385
Investment Grade \| Single name credit default swaps \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	1,734
Investment Grade \| Index credit derivatives \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	3,651
Investment Grade \| Standby Letters of Credit
Credit Derivatives [Line Items]
Standby letters of credit, Notional/Maximum Exposure to Loss	6,474
Non-Investment Grade
Credit Derivatives [Line Items]
Total, Notional/Maximum Exposure to Loss	4,883
Non-Investment Grade \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	2,707
Non-Investment Grade \| Single name credit default swaps \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	912
Non-Investment Grade \| Index credit derivatives \| Sell-protection Credit Derivatives
Credit Derivatives [Line Items]
Credit derivatives, Notional/Maximum Exposure to Loss	1,795
Non-Investment Grade \| Standby Letters of Credit
Credit Derivatives [Line Items]
Standby letters of credit, Notional/Maximum Exposure to Loss	$ 2,176