Report of Directors Corporate Governance - Performance conditions for current year LTI awards (Details) - Long-term incentive awards $ in Billions	12 Months Ended
Dec. 31, 2024 USD ($)
Disclosure of transactions between related parties [line items]
RoTE with CET1 capital ratio underpin	16.00%
Carbon reduction (own emissions)	73.00%
Sustainable finance and investment	$ 720.0
Minimum
Disclosure of transactions between related parties [line items]
RoTE with CET1 capital ratio underpin	14.00%
Carbon reduction (own emissions)	71.00%
Sustainable finance and investment	$ 648.0
Maximum
Disclosure of transactions between related parties [line items]
RoTE with CET1 capital ratio underpin	18.00%
Carbon reduction (own emissions)	78.00%
Sustainable finance and investment	$ 792.0
Return on tangible equity
Disclosure of transactions between related parties [line items]
Measures (weighting)	40.00%
Relative TSR
Disclosure of transactions between related parties [line items]
Measures (weighting)	40.00%
Environment
Disclosure of transactions between related parties [line items]
Measures (weighting)	20.00%

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Metric, Environment, Carbon Reduction

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