Segment Information - Schedule of Reconciliation of Segment Adjusted EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 2,381.7	$ 2,314.0	$ 2,224.6
Adjusted EBITDA	926.6	892.2	863.5
Depreciation and amortization	(577.6)	(586.8)	(587.2)
Interest expense - net	(256.4)	(216.1)	(191.0)
Other income (expense) - net	0.3	(5.3)	13.9
Equity-based compensation	(67.6)	(83.4)	(66.0)
Restructuring charges	(16.9)	(13.2)	(20.5)
Merger, acquisition and divestiture-related operating costs	(2.3)	(7.1)	(23.4)
Transition costs	(60.7)	(52.9)	(24.4)
Other adjustments	(6.7)	(8.5)	7.9
Income (loss) before provision (benefit) for income taxes and equity in net income of affiliates	(61.3)	(81.1)	(27.2)
Benefit (provision) for income taxes	33.7	34.2	28.8
Equity in net income of affiliates	3.1	3.2	2.5
Net income (loss) attributable to non-controlling interest	(4.1)	(3.3)	(6.4)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc.	(28.6)	(47.0)	(2.3)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,381.7	2,314.0	2,224.6
Operating costs	1,400.6	1,355.3	1,304.4
Adjusted EBITDA	981.1	958.7	920.2
Depreciation and amortization	(137.2)	(114.5)	(86.4)
Other EBITDA - Corporate and Other
Segment Reporting Information [Line Items]
Adjusted EBITDA	54.5	66.5	56.7
Depreciation and amortization	(440.4)	(472.3)	(500.8)
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,672.3	1,644.5	1,587.1
Operating costs	926.5	901.2	869.1
Adjusted EBITDA	745.8	743.3	718.0
Depreciation and amortization	(111.0)	(92.6)	(71.4)
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	709.4	669.5	637.5
Operating costs	474.1	454.1	435.3
Adjusted EBITDA	235.3	215.4	202.2
Depreciation and amortization	$ (26.2)	$ (21.9)	$ (15.0)