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Nasdaq Stockholders' Equity (Narrative) (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2022
shares
Dec. 31, 2022
USD ($)
vote
$ / shares
shares
Dec. 31, 2021
vote
$ / shares
shares
Dec. 31, 2020
$ / shares
Jan. 31, 2022
USD ($)
Stockholders Equity [Line Items]          
Common stock, shares authorized (in shares)   900,000,000 900,000,000    
Common stock, shares issued (in shares)   513,157,630 520,256,817    
Common stock, shares outstanding (in shares)   491,592,491 500,038,905    
Common stock (in votes per share) | vote   1 1    
Common stock holder voting rights, maximum percentage of the then-outstanding shares of Nasdaq common stock   5.00% 5.00%    
Common stock in treasury (in shares)   21,565,139 20,217,912    
Authorized amount under share repurchase program | $   $ 650      
Preferred stock, shares authorized (in shares)   30,000,000 30,000,000    
Preferred stock par value (in dollars per share) | $ / shares   $ 0.01 $ 0.01    
Preferred stock, shares issued (in shares)   0 0    
Preferred stock, shares outstanding (in shares)   0 0    
Payments of dividends | $   $ 383      
Cash dividends declared per common share (in dollars per share) | $ / shares   $ 0.78 $ 0.70 $ 0.65  
Dividends declared | $   $ 383      
Common stock | ASR agreement          
Stockholders Equity [Line Items]          
Authorized amount under share repurchase program | $         $ 325
Share repurchase program (in shares) 5,629,161