Disclosure Of Effect Of Changes In Foreign Exchange Rates [Text Block]

SANTANDER UK PLC - Filing #5588864

Concept	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2024-01-01 to 2024-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2023-01-01 to 2023-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31	2022-01-01 to 2022-12-31
Disclosure of effect of changes in foreign exchange rates [text block]		—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of information when currency is not exchangeable into another currency [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of information when foreign operation’s functional currency is not exchangeable into presentation currency [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of summarised financial information about foreign operation [text block]	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
Disclosure of summarised financial information about foreign operation [abstract]
Disclosure of summarised financial information about foreign operation [line items]
Profit (loss)	971,000,000 GBP	—	—	971,000,000 GBP	971,000,000 GBP	1,541,000,000 GBP	—	1,541,000,000 GBP	1,541,000,000 GBP	—	—	1,394,000,000 GBP	1,394,000,000 GBP	—	1,394,000,000 GBP
Other comprehensive income	281,000,000 GBP	31,000,000 GBP	11,000,000 GBP	301,000,000 GBP	281,000,000 GBP	327,000,000 GBP	780,000,000 GBP	442,000,000 GBP	327,000,000 GBP	11,000,000 GBP	1,235,000,000 GBP	1,690,000,000 GBP	1,690,000,000 GBP	20,000,000 GBP	435,000,000 GBP
Comprehensive income	690,000,000 GBP	31,000,000 GBP	11,000,000 GBP	670,000,000 GBP	690,000,000 GBP	1,868,000,000 GBP	780,000,000 GBP	1,099,000,000 GBP	1,868,000,000 GBP	11,000,000 GBP	1,235,000,000 GBP	296,000,000 GBP	296,000,000 GBP	20,000,000 GBP	959,000,000 GBP