Analysis Of Income And Expense [Abstract]

mBank S.A. - Filing #6228904

Concept	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Analysis of income and expense [abstract]
Revenue [abstract]
Interest income	—	—	—	4 431 737 PLN	—	—	—	—	—	4 688 353 PLN	—	—	—	—	—	—
Dividend income	—	—	—	5 046 PLN	—	—	—	—	—	4 926 PLN	—	—	—	—	—	—
Material income and expense [abstract]
Interest expense	—	—	—	327 694 PLN	—	—	—	—	—	679 053 PLN	—	—	—	—	—	—
Interest income (expense)	—	—	—	4 104 043 PLN	—	—	—	—	—	4 009 300 PLN	—	—	—	—	—	—
Fee and commission income (expense) [abstract]
Fee and commission income [abstract]
Fee and commission income	—	—	—	2 714 896 PLN	—	—	—	—	—	2 244 561 PLN	—	—	—	—	—	—
Fee and commission expense [abstract]
Fee and commission expense	—	—	—	824 875 PLN	—	—	—	—	—	736 276 PLN	—	—	—	—	—	—
Fee and commission income (expense)	—	—	—	1 890 021 PLN	—	—	—	—	—	1 508 285 PLN	—	—	—	—	—	—
Expenses by nature [abstract]
Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract]
Depreciation and amortisation expense [abstract]
Depreciation and amortisation expense	—	—	—	436 254 PLN	—	—	—	—	—	430 628 PLN	—	—	—	—	—	—
Tax expense other than income tax expense	—	—	—	608 627 PLN	—	—	—	—	—	531 379 PLN	—	—	—	—	—	—
Other expenses, by nature	—	—	—	320 898 PLN	—	—	—	—	—	234 820 PLN	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of attribution of expenses by nature to their function [abstract]
Disclosure of attribution of expenses by nature to their function [line items]
Comprehensive income, continuing and discontinued operations [abstract]
Comprehensive income	60,000 PLN	1 788 889 PLN	- PLN	2 967 702 PLN	- PLN	- PLN	2 967 642 PLN	1 178 753 PLN	- PLN	511 548 PLN	74,000 PLN	- PLN	- PLN	103 831 PLN	511 622 PLN	407 791 PLN
Comprehensive income attributable to owners of parent, continuing and discontinued operations [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	2 967 642 PLN	—	—	—	—	—	511 622 PLN	—	—	—	—	—	—
Comprehensive income attributable to non-controlling interests, continuing and discontinued operations [abstract]
Comprehensive income, attributable to non-controlling interests	—	—	—	60,000 PLN	—	—	—	—	—	74,000 PLN	—	—	—	—	—	—