Nasdaq Stockholders' Equity (Schedule of Dividends Declared) (Details) - USD ($) $ / shares in Units, $ in Millions									1 Months Ended	12 Months Ended
	Dec. 16, 2022	Oct. 19, 2022	Sep. 30, 2022	Jul. 19, 2022	Jun. 24, 2022	Apr. 20, 2022	Mar. 25, 2022	Jan. 26, 2022	Jan. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)										$ 0.78	$ 0.70	$ 0.65
Total Amount Paid										$ 383
Subsequent Event
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)									$ 0.20
Total Amount Paid									$ 98
Dividend declaration date, first quarter
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)								$ 0.18
Total Amount Paid							$ 88
Dividend declaration date, second quarter
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)						$ 0.20
Total Amount Paid					$ 98
Dividend declaration date, third quarter
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)				$ 0.20
Total Amount Paid			$ 99
Dividend declaration date, fourth quarter
Dividends Payable [Line Items]
Dividend per common share (in dollars per share)		$ 0.20
Total Amount Paid	$ 98