Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 106.7	$ 88.3	$ 251.0	$ 265.6
Foreign currency translation:
Foreign currency translation adjustment	54.5	(70.7)	(124.6)	(46.8)
Benefit (expense) for income taxes	0.0	0.5	1.9	0.2
Foreign currency translation, net	54.5	(70.2)	(122.7)	(46.6)
Hedge instruments:
Hedge instruments: Net change on interest rate cap	0.0	(0.4)	4.1	(12.2)
Hedge instruments: Net change on interest rate swap	6.4	(5.6)	(53.3)	(43.7)
Hedge instruments: Cumulative effect of adopting ASU 2017-12	0.0	0.0	0.0	1.0
Hedge instruments: Expense for income taxes	(1.4)	1.2	12.4	13.7
Hedge instruments, net	5.0	(4.8)	(36.8)	(41.2)
Available-for-sale debt securities:
Available-for-sale debt securities: Net unrealized loss	0.0	0.1	0.0	0.1
Available-for-sale debt securities: Benefit for income taxes	0.0	0.0	0.0	0.0
Available-for-sale debt securities, net	0.0	0.1	0.0	0.1
Total other comprehensive (loss) income, net of tax	59.5	(74.9)	(159.5)	(87.7)
Comprehensive income	166.2	13.4	91.5	177.9
Less: comprehensive income attributable to noncontrolling interests	(4.5)	4.8	(8.2)	(0.9)
Comprehensive income attributable to TransUnion	$ 161.7	$ 18.2	$ 83.3	$ 177.0