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Discontinued Operations - Reconciliation of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disposal Group, Including Discontinued Operations [Line Items]
Equity in losses of unconsolidated affiliates	$ 1.8	$ (95.7)	$ (4.0)	$ (97.6)
Net loss from discontinued operations, net of tax	$ 0.0	(11.0)	$ 0.0	(87.3)
Dun And Bradstreet Corporation | Discontinued Operations, Held-for-Sale or Disposed of by Sale | Dun And Bradstreet Corporation
Disposal Group, Including Discontinued Operations [Line Items]
Recognized losses		(4.3)		(76.0)
Equity in losses of unconsolidated affiliates		(6.7)		(11.3)
Loss from discontinued operations before income taxes		(11.0)		(87.3)
Income tax expense (benefit)		$ 0.0		0.0
Net loss from discontinued operations, net of tax				$ (87.3)

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