Statement Of Changes In Equity [Abstract]

TP ICAP Group PLC - Filing #1596611

Concept	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	As at 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 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	2021-01-01 to 2021-12-31	As at 2021-12-31	2021-01-01 to 2021-12-31	As at 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	As at 2021-12-31	2021-01-01 to 2021-12-31	2021-01-01 to 2021-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	As at 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	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	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	2020-01-01 to 2020-12-31	As at 2020-01-01	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31	As at 2019-12-31
Statement of changes in equity [abstract]
Statement of changes in equity [line items]
Equity	—	2 6 GBP	2 , 76 9 GBP	—	5,000,000 GBP	94 6 GBP	– GBP	—	—	—	38,000,000 GBP	—	—	—	1,9 7 8 GBP	—	– GBP	1 ,9 6 1 GBP	– GBP	—	17,000,000 GBP	197,000,000 GBP	—	—	– GBP	—	1 , 182 GBP	4,000,000 GBP	19,000,000 GBP	—	141,000,000 GBP	1,67 9 GBP	—	—	—	—	41,000,000 GBP	1,3 8 3 GBP	1, 3 8 4 GBP	27,000,000 GBP	17,000,000 GBP	—	—	1,6 9 8 GBP	—	—	—	1 , 730 GBP	1 , 730 GBP	17,000,000 GBP	1, 3 8 4 GBP	1 ,375 GBP	1 , 182 GBP	12,000,000 GBP	16,000,000 GBP	141,000,000 GBP	5,000,000 GBP	1,7 1 2 GBP	18,000,000 GBP
Changes in equity [abstract]
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	– 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	—	—	—	—	—	—	—	—	—	—	—	—
Dividends recognised as distributions to owners	2,000,000 GBP	—	—	– GBP	—	—	—	– GBP	– GBP	– GBP	—	– GBP	– GBP	4 7 GBP	—	– GBP	—	—	—	– GBP	—	—	4 9 GBP	4 7 GBP	—	95,000,000 GBP	—	—	—	– GBP	—	—	– GBP	94,000,000 GBP	– GBP	– GBP	—	—	—	—	—	– GBP	– GBP	—	1,000,000 GBP	– GBP	94,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—