Organization and Nature of Operations (Details) $ in Trillions	9 Months Ended
	Sep. 30, 2026 USD ($) exchange exchangeTradedProduct country company financialInstitution segment
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	5,829
Number of exchange traded products licensed to Nasdaq's Indexes (in exchange traded products) \| exchangeTradedProduct	487
Number of equity exchanges (in exchanges) \| exchange	28
Number of countries services are provided (in countries) \| country	20
Assets management value \| $	$ 1.2
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) \| company	4,726
Number of ETPs \| exchangeTradedProduct	1,292
Approximate combined market capitalization \| $	$ 47.1
Europe \| Capital Access Platforms
Organization And Basis Of Presentation [Line Items]
Total number of listed companies within Nordic and Baltic exchanges (in companies) \| company	1,103
Approximate combined market capitalization \| $	$ 2.4