Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 203	$ 247
Other comprehensive loss:
Foreign currency translation losses		(215)	(106)
Income tax expense	[1]	(8)	(9)
Foreign currency translation, net		(223)	(115)
Comprehensive income (loss) attributable to Nasdaq		$ (20)	$ 132

[1] Primarily relates to the tax effect of unrealized gains on Euro denominated notes.