Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Financial Designation, Predecessor and Successor [Fixed List]		Predecessor		Predecessor
Net income attributable to Tradeweb Markets	$ 29,612		$ 42,440	$ 42,440
Foreign currency translation adjustments attributable to non-controlling interests	(1,329)		(1,976)
Total comprehensive income	28,283	$ 44,949	40,464
Net income attributable to non-controlling interests	18,966		30,954
Foreign currency translation adjustments attributable to noncontrolling interests	(737)		(1,096)
Comprehensive income attributable to non-controlling interests	$ 18,229		29,858
Tradeweb Markets LLC
Net income attributable to Tradeweb Markets		45,955	42,352	130,160
Foreign currency translation adjustments attributable to non-controlling interests		(1,006)	988	(3,064)
Total comprehensive income		$ 44,949	$ 43,340	$ 127,096