Assets and Liabilities Held for Sale - Schedule of Debt Obligation (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025	Aug. 04, 2025
Debt Instrument [Line Items]
Total outstanding principal	$ 626.4	$ 617.5
Unamortized premium net of unamortized deferred financing costs	10.4	18.6
Debt obligations, net of current portion	62.1	80.3
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Spectrum Segment
Debt Instrument [Line Items]
Total outstanding principal	105.8	69.7
Unamortized premium net of unamortized deferred financing costs	0.7	(6.9)
Debt obligations, net of current portion	106.5	62.8
Bridge Loan Facility \| Senior Notes \| Disposal Group, Held-for-Sale, Not Discontinued Operations \| Spectrum Segment
Debt Instrument [Line Items]
Outstanding debt	105.8	0.0
8.50% Note \| Senior Notes \| Disposal Group, Held-for-Sale, Not Discontinued Operations \| Spectrum Segment
Debt Instrument [Line Items]
Outstanding debt	0.0	19.3
Interest rate			8.50%
11.45% Notes \| Senior Notes \| Disposal Group, Held-for-Sale, Not Discontinued Operations \| Spectrum Segment
Debt Instrument [Line Items]
Outstanding debt	$ 0.0	$ 50.4
Interest rate			11.45%

Contractual interest rate for funds borrowed, under the debt agreement.

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