Condensed Consolidated Statements of Stockholder Equity - USD ($) $ in Millions	Total		Total stockholder equity	Common stock	Capital surplus	(Accumulated deficit) Retained earnings	Treasury stock	Cumulative translation adjustment	Defined benefit postretirement plans	Cash flow hedging derivative	Non-controlling interest
Pension adjustments, tax benefit (expense)	$ (0.1)
Change in cumulative translation adjustment, tax expense (benefit)	(1.1)
Derivative financial instrument, tax expense (benefit)	(0.1)
Balance at beginning of period at Dec. 31, 2020	3,583.9		$ 3,525.6	$ 0.0	$ 4,310.2	$ (690.1)	$ 0.0	$ 26.2	$ (120.3)	$ (0.4)	$ 58.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(23.3)		(25.0)			(25.0)					1.7
Shares issued for Bisnode acquisition	158.9		158.9		158.9
Equity-based compensation plans	5.9		5.9		6.2		(0.3)
Pension adjustments, net of tax expense (benefit)	0.4		0.4						0.4
Change in cumulative translation adjustment, net of tax expense (benefit)	(49.3)	[1]	(50.0)					(50.0)			0.7
Derivative financial instruments, net of tax expense (benefit)	1.8	[2]	1.8							1.8
Payment to non-controlling interest	(0.1)										(0.1)
Balance at end of period at Mar. 31, 2021	3,678.2		3,617.6	0.0	4,475.3	(715.1)	(0.3)	(23.8)	(119.9)	1.4	60.6
Pension adjustments, tax benefit (expense)	0.1
Change in cumulative translation adjustment, tax expense (benefit)	0.9
Derivative financial instrument, tax expense (benefit)	8.7
Balance at beginning of period at Dec. 31, 2021	3,745.3		3,681.2	0.0	4,500.4	(761.8)	(0.3)	(52.6)	(11.9)	7.4	64.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(29.8)		(31.3)			(31.3)					1.5
Equity-based compensation plans	6.4		6.4		6.4		0.0
Pension adjustments, net of tax expense (benefit)	(0.1)		(0.1)						(0.1)
Change in cumulative translation adjustment, net of tax expense (benefit)	(36.3)	[1]	(36.3)					(36.3)			0.0
Derivative financial instruments, net of tax expense (benefit)	23.6	[2]	23.6							23.6
Payment to non-controlling interest	(0.2)										(0.2)
Balance at end of period at Mar. 31, 2022	$ 3,708.9		$ 3,643.5	$ 0.0	$ 4,506.8	$ (793.1)	$ (0.3)	$ (88.9)	$ (12.0)	$ 31.0	$ 65.4

[1] Tax Expense (Benefit) of $(0.9) million and $1.1 million for the three months ended March 31, 2022 and 2021, respectively.

[2] Tax Expense (Benefit) of $8.7 million and $(0.1) million for the three months ended March 31, 2022 and 2021, respectively.