Revenue and Contracts in Process - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Jan. 01, 2024
Revenue from External Customer [Line Items]
Accounts receivable, net, contracts with customers				$ 273.2
Contract assets	$ 80.8		$ 106.3
Contract liabilities	175.5		$ 109.1
Infrastructure
Revenue from External Customer [Line Items]
Contract assets				118.6
Contract liabilities				$ 153.5
Contract assets, increase due to new projects	45.6	$ 63.6
Contract assets, reclassified to receivables	71.1	68.4
Contract liabilities, increase due to new projects	166.2	78.3
Contract liabilities, revenue recognized	99.8	$ 146.3
Remaining performance obligation amount	$ 1,537.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Infrastructure \| Within One Year
Revenue from External Customer [Line Items]
Remaining performance obligation period	1 year
Remaining performance obligation amount	$ 1,127.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Infrastructure \| Within Three Years
Revenue from External Customer [Line Items]
Remaining performance obligation period	5 years
Remaining performance obligation amount	$ 410.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Spectrum \| Broadcast station
Revenue from External Customer [Line Items]
Remaining performance obligation amount	$ 12.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Spectrum \| Broadcast station \| Within One Year
Revenue from External Customer [Line Items]
Remaining performance obligation period	1 year
Remaining performance obligation amount	$ 8.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Spectrum \| Broadcast station \| Within Three Years
Revenue from External Customer [Line Items]
Remaining performance obligation period	3 years
Remaining performance obligation amount	$ 4.1
DBMG \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 \| Infrastructure
Revenue from External Customer [Line Items]
Remaining performance obligation period	3 years 3 months 18 days

INNOVATE Corp. 10-Q