Consolidated Statements of Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Gross revenue		$ 212,107	$ 190,485	$ 446,713	$ 377,277
Expenses
Employee compensation and benefits		88,866	95,995	179,386	173,268
Depreciation and amortization		37,919	34,292	75,095	67,795
Technology and communications		12,042	9,519	22,360	19,559
General and administrative		7,523	9,365	15,863	18,454
Professional fees		6,609	6,738	13,520	13,709
Occupancy		3,509	3,621	7,235	7,260
Total expenses		156,468	159,530	313,459	300,045
Operating income		55,639	30,955	133,254	77,232
Net interest income (expense)		(286)	175	413	1,033
Income before taxes		55,353	31,130	133,667	78,265
Provision for income taxes		(12,945)	(6,314)	(28,774)	(11,097)
Net income		42,408	24,816	104,893	67,168
Less: Net income attributable to non-controlling interests		11,912	11,988	30,469	11,988
Net income attributable to Tradeweb Markets Inc.		$ 30,496	$ 12,828	$ 74,424	12,828
EPS calculations for post-IPO and pre-IPO periods
Basic (in dollars per share)	[1]	$ 0.17	$ 0.09	$ 0.43
Diluted (in dollars per share)	[1]	$ 0.16	$ 0.09	$ 0.41
Weighted average shares outstanding
Basic (in shares)	[1]	177,649,501	142,933,192	171,942,125
Diluted (in shares)	[1]	185,489,824	150,847,183	180,008,891
Tradeweb Markets LLC
Expenses
Less: Net income attributable to non-controlling interests		$ 0	$ 0	$ 0	$ 42,352
EPS calculations for post-IPO and pre-IPO periods
Basic (in dollars per share)	[1]				$ 0.19
Diluted (in dollars per share)	[1]				$ 0.19
Weighted average shares outstanding
Basic (in shares)	[1]				222,222,197
Diluted (in shares)	[1]				223,320,457
Tradeweb Markets Inc
Expenses
Net income		42,408	24,816	104,893	$ 24,816
Less: Net income attributable to non-controlling interests		$ 11,912	$ 11,988	$ 30,469	$ 11,988
EPS calculations for post-IPO and pre-IPO periods
Basic (in dollars per share)		$ 0.17	$ 0.09	$ 0.43	$ 0.09	[2]
Diluted (in dollars per share)		$ 0.16	$ 0.09	$ 0.41	$ 0.09	[2]
Weighted average shares outstanding
Basic (in shares)		177,649,501	142,933,192	171,942,125	142,933,192	[2]
Diluted (in shares)		185,489,824	150,847,183	180,008,891	150,847,183	[2]
Transaction fees
Revenues
Gross revenue		$ 122,146	$ 103,952	$ 262,970	$ 206,592
Subscription fees
Revenues
Gross revenue		35,006	34,566	69,489	69,011
Commissions
Revenues
Gross revenue		38,115	36,413	80,608	70,610
Refinitiv market data fees
Revenues
Gross revenue		14,565	13,385	29,193	27,001
Other
Revenues
Gross revenue		$ 2,275	$ 2,169	$ 4,453	$ 4,063

[1] Presents information for Tradeweb Markets Inc. (post-IPO period).

[2] Presents information for Tradeweb Markets LLC (pre-IPO period).