Earnings (Loss) Per Share - Basic and Diluted Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net income (loss) attributable to Dun & Bradstreet Holdings, Inc.	$ (23.2)	$ (33.7)
Weighted average number of shares outstanding-basic (in shares)	431,555,922	429,584,681
Weighted average number of shares outstanding-diluted (in shares)	431,555,922	429,584,681
Earnings (loss) per share of common stock attributable to Dun & Bradstreet Holdings, Inc.:
Basic (in USD per share)	$ (0.05)	$ (0.08)
Diluted (in USD per share)	$ (0.05)	$ (0.08)
Antidilutive securities excluded from computation of EPS (in shares)	10,900,000	11,700,000