Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue		$ 588.5	$ 556.3	$ 1,683.6	$ 1,629.6
Cost of services (exclusive of depreciation and amortization)		206.5	175.0	607.4	533.3
Selling and administrative expenses		181.6	184.1	552.2	548.9
Depreciation and amortization		146.7	145.1	437.1	441.5
Restructuring charges		1.6	6.6	10.4	14.3
Operating costs		536.4	510.8	1,607.1	1,538.0
Operating income (loss)		52.1	45.5	76.5	91.6
Interest income		1.7	0.5	4.2	1.1
Interest expense		(57.0)	(49.1)	(168.4)	(138.2)
Other income (expense) - net		(3.3)	8.8	(1.2)	10.7
Non-operating income (expense) - net		(58.6)	(39.8)	(165.4)	(126.4)
Income (loss) before provision (benefit) for income taxes and equity in net income of affiliates		(6.5)	5.7	(88.9)	(34.8)
Less: provision (benefit) for income taxes		(11.2)	(4.2)	(40.5)	(13.6)
Equity in net income of affiliates		0.6	0.5	2.1	1.8
Net income (loss)		5.3	10.4	(46.3)	(19.4)
Less: net (income) loss attributable to the non-controlling interest		(0.9)	(2.4)	(2.4)	(5.7)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., Basic		4.4	8.0	(48.7)	(25.1)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., Diluted		$ 4.4	$ 8.0	$ (48.7)	$ (25.1)
Basic earnings (loss) per share of common stock attributable to Dun & Bradstreet Holdings, Inc. (in USD per share)		$ 0.01	$ 0.02	$ (0.11)	$ (0.06)
Diluted earnings (loss) per share of common stock attributable to Dun & Bradstreet Holdings, Inc. (in USD per share)		$ 0.01	$ 0.02	$ (0.11)	$ (0.06)
Weighted average number of shares outstanding-basic (in shares)		430,816,432	429,209,862	430,295,432	429,043,929
Weighted average number of shares outstanding-diluted (in shares)		432,224,821	429,426,048	430,295,432	429,043,929
Other comprehensive income (loss), net of income taxes:
Net income (loss)		$ 5.3	$ 10.4	$ (46.3)	$ (19.4)
Foreign currency translation adjustments, net of tax	[1]	(31.9)	(93.1)	(33.7)	(220.0)
Net investment hedge derivative, net of tax	[2]	9.8	16.4	3.1	21.9
Cash flow hedge derivative, net of tax expense (benefit)	[3]	(3.7)	12.5	4.0	43.4
Defined benefit pension plans:
Prior service credit (cost), net of tax expense (benefit)	[4]	(0.1)	0.0	(0.3)	(0.2)
Net actuarial gain (loss), net of tax expense (benefit)	[5]	(0.6)	0.0	(1.7)	0.0
Total other comprehensive income (loss), net of tax		(26.5)	(64.2)	(28.6)	(154.9)
Comprehensive income (loss), net of tax		(21.2)	(53.8)	(74.9)	(174.3)
Less: comprehensive (income) loss attributable to the non-controlling interest		(0.7)	1.3	(2.3)	1.5
Comprehensive income (loss) attributable to Dun & Bradstreet Holdings, Inc.		$ (21.9)	$ (52.5)	$ (77.2)	$ (172.8)

[1] Tax Expense (Benefit) of $(0.2) million and $(4.0) million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $6.9 million and $(6.9) million for the nine months ended September 30, 2023 and 2022, respectively.

[2] Tax Expense (Benefit) of $0.1 million and $6.0 million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $(2.3) million and $8.0 million for the nine months ended September 30, 2023 and 2022, respectively.

[3] Tax Expense (Benefit) of $(2.2) million and $4.5 million for the three months ended September 30, 2023 and 2022, respectively. Tax Expense (Benefit) of $0.5 million and $15.9 million for the nine months ended September 30, 2023 and 2022, respectively.

[4] Tax Expense (Benefit) of less than $(0.1) million for the three months ended September 30, 2023. Tax Expense (Benefit) of less than $(0.1) million and $(0.1) million for the nine months ended September 30, 2023 and 2022, respectively.

[5] Tax Expense (Benefit) of less than $(0.1) million for the three months ended September 30, 2023. Tax Expense (Benefit) of $(0.1) million for the nine months ended September 30, 2023.