Organization and Nature of Operations (Details) - 6 months ended Jun. 30, 2026 $ in Trillions	segment company exchangeTradedProduct exchange country	exchangeTradedProduct	USD ($)	financialInstitution
Organization And Basis Of Presentation [Line Items]
Number of operating segments (in segments) | segment	3
Capital Access Platforms
Organization And Basis Of Presentation [Line Items]
Total number of listed companies within Nordic and Baltic exchanges (in companies) | company	5,768
Number of exchange traded products licensed to Nasdaq's Indexes (in exchange traded products) | exchangeTradedProduct	481
Number of equity exchanges (in exchanges) | exchange	28
Number of countries services are provided (in countries) | country	20
Assets management value			$ 1.1
Financial Technology | Financial Crime Management Technology
Organization And Basis Of Presentation [Line Items]
Number of financial institution | financialInstitution				2,800
Market Services
Organization And Basis Of Presentation [Line Items]
Number of equity exchanges (in exchanges) | exchange	18
United States | Capital Access Platforms
Organization And Basis Of Presentation [Line Items]
Total number of listings on The Nasdaq Stock Market (in companies)	4,659	1,243
Approximate combined market capitalization			45.7
Europe | Capital Access Platforms
Organization And Basis Of Presentation [Line Items]
Total number of listed companies within Nordic and Baltic exchanges (in companies) | company	1,109
Approximate combined market capitalization			$ 2.4