Statement Of Financial Position [Abstract]

TP ICAP Group PLC - Filing #1596614

Concept	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 2021-12-31	As at 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	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	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 financial position [abstract]
Assets [abstract]
Property, plant and equipment	—	—	—	—	—	—	123,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	101,000,000 GBP	72,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Right-of-use assets	—	—	—	—	—	—	187,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	163,000,000 GBP	91,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Deferred tax assets	—	—	—	—	—	—	17,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	4,000,000 GBP	3,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	—	—	—	—	784,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	656,000,000 GBP	676,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Assets	—	—	—	—	—	—	5,450,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	4,6 3 9 GBP	3 ,9 5 4 GBP	—	—	—	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Issued capital	—	—	—	—	—	—	197,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	141,000,000 GBP	141,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Retained earnings	—	—	—	—	—	—	2 , 76 9 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1, 3 8 3 GBP	1 ,375 GBP	—	—	—	—	—	—	—	—	—	—	—
Share premium	—	—	—	—	—	—	– GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	17,000,000 GBP	17,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Other reserves	—	—	—	—	—	—	1, 005 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1, 2 4 6 GBP	1 ,205 GBP	—	—	—	—	—	—	—	—	—	—	—
Equity attributable to owners of parent	—	—	—	—	—	—	1 ,9 6 1 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1,67 9 GBP	1,7 1 2 GBP	—	—	—	—	—	—	—	—	—	—	—
Non-controlling interests	—	—	—	—	—	—	17,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	19,000,000 GBP	18,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
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	41,000,000 GBP	1 , 182 GBP	1,3 8 3 GBP	4,000,000 GBP	19,000,000 GBP	1,67 9 GBP	141,000,000 GBP	1, 3 8 4 GBP	27,000,000 GBP	17,000,000 GBP	1,6 9 8 GBP	1 , 730 GBP	18,000,000 GBP	1, 3 8 4 GBP	1 , 730 GBP	17,000,000 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
Liabilities [abstract]
Current tax liabilities	—	—	—	—	—	—	2 8 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	28,000,000 GBP	4 8 GBP	—	—	—	—	—	—	—	—	—	—	—
Deferred tax liabilities	—	—	—	—	—	—	1 07 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	79,000,000 GBP	83,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—
Liabilities	—	—	—	—	—	—	3,472,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2, 941 GBP	2,224,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—