CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (39.7)	$ (38.9)
Other comprehensive loss
Foreign currency translation adjustment, net of tax	(2.3)	(0.6)
Disposition of equity method investment, net of tax	0.0	(9.1)
Other comprehensive loss	(2.3)	(9.7)
Comprehensive loss	(42.0)	(48.6)
Comprehensive loss attributable to non-controlling interests and redeemable non-controlling interests	5.3	6.4
Comprehensive loss attributable to INNOVATE Corp.	$ (36.7)	$ (42.2)