Statement Of Changes In Equity [Abstract]

METRO BANK PLC - Filing #1866608

Concept	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	As at 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	956,000,000 GBP	—	—	—	1,964,000,000 GBP	20,000,000 GBP	1 ,015 GBP	– GBP	—	13,000,000 GBP	—	—	9 42 GBP	1 ,035 GBP	—	5,000,000 GBP	—	—	1,964,000,000 GBP	18,000,000 GBP	—	– GBP	—	—	6 9 4 GBP	– GBP	1,964,000,000 GBP	16,000,000 GBP	1, 28 9 GBP	3,000,000 GBP
Changes in equity [abstract]
Comprehensive income [abstract]
Profit (loss)	—	– GBP	7 2.7 GBP	73,000,000 GBP	—	—	—	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	– GBP	– GBP	—	—	– GBP	—	24 8 . 2 GBP	24 8 GBP	—	—	—	—	—	—
Other comprehensive income	—	– GBP	7. 6 GBP	– GBP	—	—	—	—	8,000,000 GBP	—	– GBP	– GBP	—	—	– GBP	—	– GBP	8,000,000 GBP	—	—	– GBP	—	8 . 4 GBP	– GBP	—	—	—	—	—	—
Comprehensive income	—	—	8 0. 3 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	25 6 . 6 GBP	—	—	—	—	—	—	—
Increase (decrease) through share-based payment transactions, equity	—	– GBP	2,000,000 GBP	– GBP	—	—	—	—	– GBP	—	2,000,000 GBP	– GBP	—	—	– GBP	—	2,000,000 GBP	– GBP	—	—	– GBP	—	2,000,000 GBP	– GBP	—	—	—	—	—	—