Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 210,549	$ 130,223	$ 554,376	$ 410,021
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, with no tax benefit for each of the three and nine months ended September 30, 2025 and 2024	(3,471)	10,014	12,743	7,211
Unrealized gain on available-for-sale debt security, net of tax expense of $1,521 and $2,320 for the three and nine months ended September 30, 2025	4,412	0	7,138	0
Other comprehensive income (loss), net of tax	941	10,014	19,881	7,211
Comprehensive income	211,490	140,237	574,257	417,232
Less: Net income attributable to non-controlling interests	24,913	16,307	66,576	50,724
Less: Other comprehensive income (loss) attributable to non-controlling interests	223	979	2,150	704
Comprehensive income attributable to Tradeweb Markets Inc.	$ 186,354	$ 122,951	$ 505,531	$ 365,804