Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 74.3	$ 73.4
Foreign currency translation:
Foreign currency translation adjustment	(183.0)	66.3
Benefit (expense) for income taxes	0.4	(0.2)
Foreign currency translation, net	(182.6)	66.1
Hedge instruments:
Hedge instruments: Net change on interest rate cap	(0.5)	(4.6)
Hedge instruments: Net change on interest rate swap	(46.9)	(13.8)
Hedge instruments: Cumulative effect of adopting ASU 2017-12	0.0	1.0
Hedge instruments: Expense for income taxes	11.7	4.6
Hedge instruments, net	(35.7)	(12.8)
Available-for-sale debt securities:
Available-for-sale debt securities: Net unrealized loss	0.0	0.0
Available-for-sale debt securities: Benefit for income taxes	0.0	0.0
Available-for-sale debt securities, net	0.0	0.0
Total other comprehensive (loss) income, net of tax	(218.3)	53.3
Comprehensive income	(144.0)	126.7
Less: comprehensive income attributable to noncontrolling interests	(2.4)	(2.5)
Comprehensive (loss) income attributable to TransUnion	$ (146.4)	$ 124.2