Statement Of Comprehensive Income [Abstract]

TP ICAP Group PLC - Filing #1596611

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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31
Statement of comprehensive income [abstract]
Profit (loss)	3,000,000 GBP	– GBP	– GBP	– GBP	– GBP	– GBP	– GBP	5,000,000 GBP	– GBP	– GBP	8,000,000 GBP	5,000,000 GBP	97,000,000 GBP	– GBP	– GBP	96,000,000 GBP	– GBP	– GBP	– GBP	– GBP	1,000,000 GBP	– GBP	96,000,000 GBP
Other comprehensive income [abstract]
Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract]
Other comprehensive income, before tax, gains (losses) from investments in equity instruments	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—
Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans	—	—	—	—	—	—	—	—	—	—	3,000,000 GBP	—	2,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract]
Exchange differences on translation [abstract]
Other comprehensive income, before tax, exchange differences on translation of foreign operations	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	30,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Hedges of net investment in foreign operations [abstract]
Other comprehensive income, before tax, hedges of net investments in foreign operations	—	—	—	—	—	—	—	—	—	—	3,000,000 GBP	—	2,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	—	—	—	—	—	—	—	—	—	—	– GBP	—	– GBP	—	—	—	—	—	—	—	—	—	—
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract]
Income tax relating to components of other comprehensive income that will be reclassified to profit or loss	—	—	—	—	—	—	—	—	—	—	1,000,000 GBP	—	1,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Other comprehensive income	– GBP	– GBP	– GBP	– GBP	3,000,000 GBP	– GBP	1,000,000 GBP	7,000,000 GBP	– GBP	– GBP	7,000,000 GBP	3,000,000 GBP	27,000,000 GBP	– GBP	– GBP	2,000,000 GBP	– GBP	29,000,000 GBP	– GBP	– GBP	– GBP	– GBP	27,000,000 GBP
Comprehensive income	3,000,000 GBP	– GBP	– GBP	– GBP	3,000,000 GBP	– GBP	1,000,000 GBP	12,000,000 GBP	– GBP	– GBP	15,000,000 GBP	8,000,000 GBP	70,000,000 GBP	– GBP	– GBP	98,000,000 GBP	– GBP	29,000,000 GBP	– GBP	– GBP	1,000,000 GBP	– GBP	69,000,000 GBP
Comprehensive income attributable to [abstract]
Comprehensive income, attributable to owners of parent	—	—	—	—	—	—	—	—	—	—	12,000,000 GBP	—	69,000,000 GBP	—	—	—	—	—	—	—	—	—	—
Comprehensive income, attributable to non-controlling interests	—	—	—	—	—	—	—	—	—	—	3,000,000 GBP	—	1,000,000 GBP	—	—	—	—	—	—	—	—	—	—