Segment Information - Schedule of Revenue and Operating Income (Loss) by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 540.4	$ 536.0
Adjusted EBITDA:	190.0	190.1
Depreciation and amortization	(145.4)	(149.4)
Interest expense - net	(53.9)	(46.9)
Benefit (provision) for income taxes	11.8	9.3
Other income (expense) - net	0.6	(9.3)
Equity in net income of affiliates	0.8	0.7
Net income (loss) attributable to non-controlling interest	(0.9)	(1.5)
Equity-based compensation	(20.5)	(10.7)
Restructuring charges	(4.2)	(5.3)
Merger, acquisition and divestiture-related operating costs	(2.6)	(5.1)
Transition costs	(8.4)	(6.9)
Other adjustments	(1.0)	3.7
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc., Basic	(33.7)	(31.3)
Depreciation and amortization	145.4	149.4
Capital expenditures:	1.3	4.1
Additions to computer software and other intangibles:	44.6	43.6
Finance lease, right-of-use asset	7.2		$ 4.1
Finance lease, liability			$ 4.1
Finance lease, liability, paid off	11.3
Operating segments
Segment Reporting Information [Line Items]
Depreciation and amortization	(25.2)	(20.5)
Depreciation and amortization	25.2	20.5
Capital expenditures:	0.8	4.1
Additions to computer software and other intangibles:	39.4	42.1
Corporate and other
Segment Reporting Information [Line Items]
Adjusted EBITDA:	(16.1)	(18.3)
Depreciation and amortization	(120.2)	(128.9)
Depreciation and amortization	120.2	128.9
Capital expenditures:	0.5	0.0
Additions to computer software and other intangibles:	5.2	1.5
North America | Operating segments
Segment Reporting Information [Line Items]
Revenue	374.7	367.3
Adjusted EBITDA:	150.5	153.3
Depreciation and amortization	(20.1)	(17.2)
Depreciation and amortization	20.1	17.2
Capital expenditures:	0.6	3.3
Additions to computer software and other intangibles:	31.4	35.6
International | Operating segments
Segment Reporting Information [Line Items]
Revenue	165.7	168.7
Adjusted EBITDA:	55.6	55.1
Depreciation and amortization	(5.1)	(3.3)
Depreciation and amortization	5.1	3.3
Capital expenditures:	0.2	0.8
Additions to computer software and other intangibles:	$ 8.0	$ 6.5