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Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 25, 2022
Jan. 26, 2022
Mar. 31, 2022
Mar. 31, 2021
Dividends Payable [Line Items]        
Dividend Per Common Share (in dollars per share)     $ 0.54 $ 0.49
Dividend declaration date, first quarter        
Dividends Payable [Line Items]        
Dividend Per Common Share (in dollars per share)   $ 0.54    
Total Amount Paid $ 89