Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common stock	Additional paid-in capital	Common stock in treasury, at cost	Accumulated other comprehensive loss	Retained earnings	Total Nasdaq stockholders’ equity	Noncontrolling interests
Beginning balance (in shares) at Dec. 31, 2018	165
Beginning balance, stockholders' equity at Dec. 31, 2018		$ 2	$ 2,716	$ (297)	$ (1,530)	$ 4,558
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation (in shares)			1
Share-based compensation			$ 16
Other employee stock activity				(30)
Other comprehensive loss					(115)
Net income	$ 247					247
Cash dividends declared per common share						(73)
Ending balance (in shares) at Mar. 31, 2019	166
Ending balance, stockholders' equity at Mar. 31, 2019	$ 5,494	2	2,732	(327)	(1,645)	4,732	$ 5,494
Beginning balance (in shares) at Dec. 31, 2019	165
Beginning balance, stockholders' equity at Dec. 31, 2019	$ 5,639	2	$ 2,632	$ (336)	(1,686)	5,027
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares repurchase program (in shares)			(1)
Share repurchase program	(122)		$ (122)
Share-based compensation (in shares)			1
Share-based compensation			$ 17
Other employee stock activity (in shares)				(1)
Other employee stock activity				$ (28)
Other comprehensive loss					(223)
Net income	$ 203					203
Cash dividends declared per common share						(78)
Ending balance (in shares) at Mar. 31, 2020	164
Ending balance, stockholders' equity at Mar. 31, 2020	$ 5,398	$ 2	$ 2,527	$ (364)	$ (1,909)	$ 5,140	$ 5,396	$ 2