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Debt Obligations - Schedule of Debt (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2021	Feb. 01, 2021
Debt Instrument [Line Items]
Obligations under finance leases	$ 0.2
Total aggregate finance lease and debt payments	641.3	$ 668.3
Unamortized issuance discount, issuance premium, and deferred financing costs	(3.7)	(5.5)
Less: current portion of debt obligations	(477.5)	(162.2)
Debt obligations, net of current portion	160.1	500.6
Infrastructure
Debt Instrument [Line Items]
Obligations under finance leases	0.2	0.6
Total aggregate finance lease and debt payments	115.2	144.7
Spectrum
Debt Instrument [Line Items]
Total aggregate finance lease and debt payments	69.7	69.7
Life Sciences
Debt Instrument [Line Items]
Total aggregate finance lease and debt payments	26.5	24.0
Non-Operating Corporate
Debt Instrument [Line Items]
Total aggregate finance lease and debt payments	429.9	429.9
8.50% Note | Spectrum
Debt Instrument [Line Items]
Outstanding debt	19.3	19.3
11.45% Notes | Spectrum
Debt Instrument [Line Items]
Outstanding debt	$ 50.4	50.4
20.00% Notes | Life Sciences
Debt Instrument [Line Items]
Interest rate	20.00%
8.50% Senior Secured Notes | Secured Debt | Non-Operating Corporate
Debt Instrument [Line Items]
Interest rate	8.50%		8.50%	8.50%
Outstanding debt	$ 330.0	330.0
7.50% Convertible Senior Notes | Non-Operating Corporate
Debt Instrument [Line Items]
Interest rate	7.50%
Outstanding debt	$ 48.9	48.9
SOFR plus 5.75% Line of Credit | Non-Operating Corporate
Debt Instrument [Line Items]
Basis spread on variable rate	5.75%
Outstanding debt	$ 20.0	20.0
CGIC Unsecured Note | Non-Operating Corporate
Debt Instrument [Line Items]
Outstanding debt	$ 31.0	31.0
Revolving Credit Facility | SOFR plus 3.00% Line of Credit | Line of Credit | Infrastructure | DBM Global Credit Facilities
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Outstanding debt	$ 30.0	0.0
Revolving Credit Facility | SOFR plus 3.00% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Outstanding debt	$ 85.0	$ 0.0
Revolving Credit Facility | PRIME minus 0.75% Line of Credit | Line of Credit | Infrastructure | DBM Global Credit Facilities
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Outstanding debt	$ 0.0	$ 45.0
Revolving Credit Facility | 3.25% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities
Debt Instrument [Line Items]
Interest rate	3.25%
Outstanding debt	$ 0.0	74.6
Revolving Credit Facility | PRIME minus 0.75% Term Loan | Term Loan | Infrastructure | DBM Global Credit Facilities
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Outstanding debt	$ 0.0	$ 24.5

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