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Financial risk management - Liquidity ratios (Details) - Liquidity risk	12 Months Ended
	Dec. 31, 2021 shareholder
Disclosure of nature and extent of risks arising from financial instruments [line items]
Number of top investors	10
Calculation term of LCR	30 days
LCR below 3.00 times for critical situation
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	3.00
LCR above 2.99 and below 5.00 times for satisfactory situation | Minimum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	2.99
LCR above 2.99 and below 5.00 times for satisfactory situation | Maximum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	5.00
LCR above 4.99 and below 8.00 times for comfortable situation | Minimum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	4.99
LCR above 4.99 and below 8.00 times for comfortable situation | Maximum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	8.00
LCR above 7.99 for excess liquidity situation
Disclosure of nature and extent of risks arising from financial instruments [line items]
Liquidity Coverage Ratio	7.99

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- Definition

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+ References

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+ Details

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- Definition

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+ Details

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- 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.

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