Estimated Future Investments To A More Sustainable Future

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Share-Based Compensation Arrangement By Share-Based Payment Award, Critical Financial Performance Measure Used To Evaluate Entity's Performance Against Stated Objectives, Payout, Percentage

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Metric, Average Return On Equity

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Metric, Capital Reallocation To Asia

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

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Metric, Environment And Sustainability, Sustainable Finance And Investment

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Metric, Measurement Weight, Percentage

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Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Period

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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.

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The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2021-01-01
-Paragraph 112
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-URIDate 2021-03-24

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Report of Directors Corporate Governance - Long-term incentive awards (Details)	12 Months Ended			36 Months Ended
	Dec. 31, 2021 USD ($) installment	Dec. 31, 2020 USD ($)	Dec. 31, 2019	Dec. 31, 2020
Noel Quinn
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expense from share-based payment transactions with employees	$ 4,131,000
Ewen Stevenson
Disclosure of terms and conditions of share-based payment arrangement [line items]
Expense from share-based payment transactions with employees	2,410,000
Bottom of range
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated future investments	750,000,000,000
Top of range
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated future investments	$ 1,000,000,000,000
Long-Term Incentive Awards
Disclosure of terms and conditions of share-based payment arrangement [line items]
Performance period	3 years		3 years
Number of installments \| installment	5
Return on tangible equity (with CET1 underpin)	9.50%	9.00%
Capital reallocation to Asia (with CET1 underpin)	48.00%	47.00%
Carbon reduction	56.00%	48.00%
Sustainable finance and investment	$ 340,000,000,000.0	$ 240,000,000,000.0
Long-Term Incentive Awards \| Return on tangible equity
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighting %	25.00%	25.00%
Long-Term Incentive Awards \| Capital reallocation to Asia
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighting %	25.00%	25.00%
Long-Term Incentive Awards \| Environment and sustainability
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighting %	25.00%	25.00%
Long-Term Incentive Awards \| Relative TSR
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighting %	25.00%	25.00%
Long-Term Incentive Awards \| Bottom of range
Disclosure of terms and conditions of share-based payment arrangement [line items]
Return on tangible equity (with CET1 underpin)	8.00%	8.00%
Capital reallocation to Asia (with CET1 underpin)	46.00%	45.00%
Carbon reduction	52.00%	42.00%
Sustainable finance and investment	$ 285,000,000,000.0	$ 200,000,000,000.0
Long-Term Incentive Awards \| Bottom of range \| Return on tangible equity
Disclosure of terms and conditions of share-based payment arrangement [line items]
% ROI objective				10.00%
Long-Term Incentive Awards \| Top of range
Disclosure of terms and conditions of share-based payment arrangement [line items]
Return on tangible equity (with CET1 underpin)	11.00%	10.00%
Capital reallocation to Asia (with CET1 underpin)	50.00%	50.00%
Carbon reduction	60.00%	51.00%
Sustainable finance and investment	$ 370,000,000,000.0	$ 260,000,000,000.0