Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 70.0	$ 104.0	$ 144.3	$ 177.3
Foreign currency translation:
Foreign currency translation adjustment	3.9	(42.5)	(179.1)	23.9
Benefit (expense) for income taxes	1.6	(0.1)	2.0	(0.3)
Foreign currency translation, net	5.5	(42.6)	(177.1)	23.6
Hedge instruments:
Hedge instruments: Net change on interest rate cap	4.5	(7.1)	4.1	(11.7)
Hedge instruments: Net change on interest rate swap	(12.8)	(24.3)	(59.7)	(38.1)
Hedge instruments: Cumulative effect of adopting ASU 2017-12	0.0	0.0	0.0	1.0
Hedge instruments: Expense for income taxes	2.1	7.9	13.8	12.4
Hedge instruments, net	(6.2)	(23.5)	(41.8)	(36.4)
Available-for-sale debt securities:
Available-for-sale debt securities: Net unrealized loss	0.0	0.0	0.0	0.0
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	0.0	0.0	0.0
Total other comprehensive (loss) income, net of tax	(0.7)	(66.1)	(218.9)	(12.8)
Comprehensive income	69.3	37.9	(74.6)	164.5
Less: comprehensive income attributable to noncontrolling interests	(1.4)	(3.2)	(3.8)	(5.7)
Comprehensive (loss) income attributable to TransUnion	$ 67.9	$ 34.7	$ (78.4)	$ 158.8