Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue		$ 536.0	$ 504.5
Cost of services (exclusive of depreciation and amortization)		176.7	160.9
Selling and administrative expenses		188.2	179.8
Depreciation and amortization		149.4	149.7
Restructuring charges		5.3	5.8
Operating costs		519.6	496.2
Operating income (loss)		16.4	8.3
Interest income		0.3	0.1
Interest expense		(47.2)	(48.9)
Other income (expense) - net		(9.3)	6.8
Non-operating income (expense) - net		(56.2)	(42.0)
Income (loss) before provision (benefit) for income taxes and equity in net income of affiliates		(39.8)	(33.7)
Less: provision (benefit) for income taxes		(9.3)	(9.8)
Equity in net income of affiliates		0.7	0.6
Net income (loss)		(29.8)	(23.3)
Less: net (income) loss attributable to the non-controlling interest		(1.5)	(1.7)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., Basic		(31.3)	(25.0)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., Diluted		$ (31.3)	$ (25.0)
Basic earnings (loss) per share of common stock attributable to Dun & Bradstreet Holdings, Inc. (USD per share)		$ (0.07)	$ (0.06)
Diluted earnings (loss) per share of common stock attributable to Dun & Bradstreet Holdings, Inc. (USD per share)		$ (0.07)	$ (0.06)
Weighted average number of shares outstanding-basic (shares)		428,779,816	428,503,820
Weighted average number of shares outstanding-diluted (shares)		428,779,816	428,503,820
Other comprehensive income (loss), net of income taxes:
Net income (loss)		$ (29.8)	$ (23.3)
Foreign currency translation adjustments, net of tax	[1]	(36.3)	(49.3)
Defined benefit pension plans:
Prior service credit (cost), net of tax expense (benefit)	[2]	(0.1)	0.0
Net actuarial gain (loss), net of tax expense (benefit)	[3]	0.0	0.4
Derivative financial instrument, net of tax expense (benefit)	[4]	23.6	1.8
Total other comprehensive income (loss), net of tax		(12.8)	(47.1)
Comprehensive income (loss), net of tax		(42.6)	(70.4)
Less: comprehensive (income) loss attributable to the non-controlling interest		(1.5)	(2.4)
Comprehensive income (loss) attributable to Dun & Bradstreet Holdings, Inc.		$ (44.1)	$ (72.8)

[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 less than $(0.1) million for the three months ended March 31, 2022.

[3] Tax Expense (Benefit) of $0.1 million for the three months ended March 31, 2021.

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