XML 26 R18.htm IDEA: XBRL DOCUMENT
v3.19.2

Deferred Revenue | 12 Months Ended
--- | ---
Dec. 31, 2018
Tradeweb Markets LLC |
Entity Information [Line Items] |
Deferred Revenue | 10. Deferred Revenue The Company records deferred revenue when cash payments are received or due in advance of services to be performed. The recognized revenue and remaining balance is shown below (in thousands):
|  | Successor |  |  | Predecessor |  | Predecessor
|  | October 1, |  |  | January 1, |  | Year Ended
|  | 2018 to |  |  | 2018 to |  | December 31,
|  | December 31, 2018 |  |  | September 30, 2018 |  | 2017
Deferred revenue balance – beginning of period |  | $ | 28,280 |  |  | $ | 29,673 |  | $ | 42,184
New billings |  |  | 26,609 |  |  |  | 100,091 |  |  | 127,312
Revenue recognized |  |  | (27,006) |  |  |  | (101,484) |  |  | (139,823)
Deferred revenue balance – end of period |  | $ | 27,883 |  |  | $ | 28,280 |  | $ | 29,673

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | dei_EntityInformationLineItems
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure about the contract with customer liability. + References No definition available. + Details
Name: | tw_ContractWithCustomerLiabilityTextBlock
Namespace Prefix: | tw_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=tw_TradewebMarketsLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |