Segment Information - Schedule of Revenue and Operating Income (Loss) by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 2,314.0	$ 2,224.6	$ 2,165.6
Revenue adjustment			4.8
Adjusted EBITDA:	892.2	863.5	847.1
Depreciation and amortization	(586.8)	(587.2)	(615.9)
Interest expense - net	(216.1)	(191.0)	(205.7)
Benefit (provision) for income taxes	34.2	28.8	(23.4)
Other income (expense) - net	(5.3)	13.9	14.9
Equity in net income of affiliates	3.2	2.5	2.7
Net income (loss) attributable to non-controlling interest	(3.3)	(6.4)	(5.8)
Equity-based compensation	(83.4)	(66.0)	(33.3)
Restructuring charges	(13.2)	(20.5)	(25.1)
Merger, acquisition and divestiture-related operating costs	(7.1)	(23.4)	(14.1)
Transition costs	(52.9)	(24.4)	(11.6)
Other adjustments	(8.5)	7.9	(1.5)
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., basic	(47.0)	(2.3)	(71.7)
Capital expenditures:	4.7	12.6	86.3
Additions to computer software and other intangibles:	194.7	205.3	170.7
Right of use assets	16.3	4.1
Payments to acquire real estate			76.6
Operating Segments
Segment Reporting Information [Line Items]
Depreciation and amortization	(114.5)	(86.4)	(72.3)
Capital expenditures:	4.2	12.5	86.2
Additions to computer software and other intangibles:	153.9	192.3	169.8
Corporate and other
Segment Reporting Information [Line Items]
Revenue	0.0	0.0	(4.8)
Adjusted EBITDA:	(66.5)	(56.7)	(62.3)
Depreciation and amortization	(472.3)	(500.8)	(543.6)
Capital expenditures:	0.5	0.1	0.1
Additions to computer software and other intangibles:	40.8	13.0	0.9
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,644.5	1,587.1	1,499.4
Adjusted EBITDA:	743.3	718.0	715.3
Depreciation and amortization	(92.6)	(71.4)	(60.2)
Capital expenditures:	2.3	8.5	81.1
Additions to computer software and other intangibles:	127.9	161.8	144.0
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	669.5	637.5	671.0
Adjusted EBITDA:	215.4	202.2	194.1
Depreciation and amortization	(21.9)	(15.0)	(12.1)
Capital expenditures:	1.9	4.0	5.1
Additions to computer software and other intangibles:	$ 26.0	$ 30.5	$ 25.8