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Nasdaq Stockholders' Equity (Common Stock in Treasury) (Details) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2022 USD ($) $ / shares shares
Other repurchases of common stock |
Dividends Payable [Line Items] |
Number of shares of common stock repurchased (in shares) | 307,668
Share repurchase program |
Dividends Payable [Line Items] |
Share repurchase program (in shares) | 735,865
Average price paid per share (in dollars per share) | $ / shares | $ 191.91
Total purchase price (in millions) | $ | $ 142

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