v3.25.4

Insurance business - (C) Insurance and participating investment contracts assets and liabilities (Details) - GBP (£) £ in Millions	Dec. 31, 2025	Jun. 11, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Insurance contract assets	£ 113		£ 0
Liabilities arising from insurance and participating investment contracts	(135,318)		(122,087)
Net liability	(135,205)		(127,355)
Insurance acquisition assets	34		23
Net liabilities	(135,171)		(127,332)
Disposal group
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Liabilities arising from insurance and participating investment contracts	0	£ (5,100)	(5,268)
Life
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Insurance contract assets	113		0
Liabilities arising from insurance and participating investment contracts	(134,906)		(121,700)
Net liability	(134,793)		(126,968)	£ (119,783)
Insurance acquisition assets	0		0
Net liabilities	(134,793)		(126,968)
Life | Disposal group
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Liabilities arising from insurance and participating investment contracts	0		(5,268)
Non-life
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Insurance contract assets	0		0
Liabilities arising from insurance and participating investment contracts	(412)		(387)
Net liability	(412)		(387)	£ (364)
Insurance acquisition assets	34		23
Net liabilities	(378)		(364)
Non-life | Disposal group
Disclosure of reconciliation of changes in insurance contracts by remaining coverage and incurred claims [line items]
Liabilities arising from insurance and participating investment contracts	£ 0		£ 0

X

- Definition

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

+ References

No definition available.

+ Details

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- Definition

The amount of insurance contracts liability (asset). [Refer: Assets; Liabilities; Insurance contracts [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2025-01-01
-Paragraph 99
-Subparagraph b
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-URIDate 2025-03-27

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- Definition

The amount of insurance contracts that are assets. [Refer: Assets; Insurance contracts [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2025-01-01
-Paragraph 99
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2025-en-r&anchor=para_99_b&doctype=Standard
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- Definition

The amount of insurance contracts that are liabilities. [Refer: Liabilities; Insurance contracts [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2025-01-01
-Paragraph 99
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2025-en-r&anchor=para_99_b&doctype=Standard
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- Definition

Insurance Acquisition Cash Flows Assets

+ References

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- Definition

Insurance Contracts Issued That Are Liabilities, Net of Insurance Acquisition Assets

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