Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Financial Designation, Predecessor and Successor [Fixed List]		Predecessor		Predecessor
Gross revenue	$ 200,981	$ 165,253	$ 578,258	$ 505,771
Contingent consideration		2,537		(26,830)
Net revenue	200,981	167,790	578,258	478,941
Expenses
Employee compensation and benefits	79,644	69,076	252,912	209,053
Depreciation and amortization	35,133	16,362	102,928	48,808
Technology and communications	9,527	9,112	29,086	26,598
General and administrative	7,507	9,386	25,961	23,056
Professional fees	7,272	7,546	20,981	20,360
Occupancy	3,640	3,491	10,900	10,732
Total expenses	142,723	114,973	442,768	338,607
Operating income	58,258	52,817	135,490	140,334
Net interest income	636	673	1,669	1,726
Income before taxes	58,894	53,490	137,159	142,060
Provision for income taxes	(10,316)	(7,535)	(21,413)	(11,900)
Net income	48,578	45,955	115,746	130,160
Less: Pre-IPO net income attributable to Tradeweb Markets LLC			42,352
Net income attributable to Tradeweb Markets Inc. and non-controlling interests	48,578		73,394
Less: Net income attributable to non-controlling interests	18,966		30,954
Net income attributable to Tradeweb Markets Inc.	$ 29,612		$ 42,440	$ 42,440
Earnings per share
Basic	$ 0.21		$ 0.30	$ 0.30
Diluted	$ 0.20		$ 0.28	$ 0.28
Weighted average interests outstanding
Basic	142,935,206		142,934,221	142,934,221
Diluted	151,362,643		151,158,760	151,158,760
Transaction fees
Revenues
Gross revenue	$ 112,746	92,582	$ 319,338	$ 273,751
Subscription fees
Revenues
Gross revenue	35,387	33,157	104,398	107,130
Commissions
Revenues
Gross revenue	37,590	24,394	108,200	79,830
Refinitiv market data fees
Revenues
Gross revenue	13,251	12,533	40,252	36,851
Other
Revenues
Gross revenue	$ 2,007	2,587	6,070	8,209
Tradeweb Markets LLC
Expenses
Less: Pre-IPO net income attributable to Tradeweb Markets LLC		45,955	42,352	130,160
Net income attributable to Tradeweb Markets Inc.		$ 45,955	$ 42,352	$ 130,160
Earnings per share
Basic		$ 0.21	$ 0.19	$ 0.60
Diluted		$ 0.21	$ 0.19	$ 0.60
Weighted average interests outstanding
Basic		219,165,997	222,222,197	215,365,920
Diluted		219,165,997	223,320,457	215,365,920