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Operating Segments and Related Information (Tables)
9 Months Ended
Sep. 30, 2023
Segment Reporting [Abstract]  
Schedules of Concentration of Risk, by Risk Factor
The Company's revenue concentrations of 10% and greater were as follows:

Three Months Ended September 30,Nine Months Ended September 30,
Segment2023202220232022
Customer AInfrastructure26.8%25.2%27.5%24.2%
Customer BInfrastructure13.9%*12.9%*
Customer CInfrastructure*10.1%**
*Less than 10% revenue concentration
Summary of Company's Operating Segments
Summarized financial information with respect to the Company’s operating segments is as follows (in millions):

 Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Revenue
Infrastructure
$369.3 $412.7 $1,043.4 $1,197.0 
Life Sciences0.6 1.2 1.8 3.0 
Spectrum5.4 9.1 16.8 28.0 
Total revenue$375.3 $423.0 $1,062.0 $1,228.0 

 Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Income (loss) from operations
Infrastructure
$20.9 $18.5 $41.9 $42.2 
Life Sciences(3.3)(5.5)(11.6)(15.7)
Spectrum(2.1)(0.6)(3.2)(4.1)
Other— (0.3)(1.9)(0.4)
Non-operating Corporate(4.8)(5.5)(12.7)(15.1)
Total income from operations
$10.7 $6.6 $12.5 $6.9 

 Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Reconciliation of the consolidated segment income from operations to consolidated loss from operations before income taxes
Income from operations$10.7 $6.6 $12.5 $6.9 
Interest expense(17.1)(13.3)(49.0)(38.4)
Loss from equity investees(1.5)(1.1)(5.8)(2.1)
Other income (expense), net0.4 (0.9)17.2 0.5 
Loss from operations before income taxes$(7.5)$(8.7)$(25.1)$(33.1)

 Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Depreciation and Amortization
Infrastructure
$2.6 $5.3 $11.6 $15.9 
Infrastructure recognized within cost of revenue
3.8 3.9 11.8 11.2 
Total Infrastructure6.4 9.2 23.4 27.1 
Life Sciences0.1 0.1 0.3 0.2 
Spectrum1.3 1.4 3.9 4.4 
Non-operating Corporate— — 0.1 0.1 
Total depreciation and amortization$7.8 $10.7 $27.7 $31.8 
Three Months Ended September 30,Nine Months Ended September 30,
 2023202220232022
Capital Expenditures (*)
Infrastructure
$5.5 $6.9 $12.5 $13.5 
Life Sciences— 0.2 0.3 0.3 
Spectrum0.2 0.4 0.8 2.5 
Non-operating Corporate— — 0.3 — 
Total$5.7 $7.5 $13.9 $16.3 
(*) The above capital expenditures exclude assets acquired under finance lease and other financing obligations.
Schedule of Segment Reporting for Long-term investments, Property and Equipment - Net and Assets
September 30, 2023December 31, 2022
 
Investments
Life Sciences$7.0 $7.6 
Other— 51.9 
Total$7.0 $59.5 

September 30, 2023December 31, 2022
Equity Method Investments (included in Investments above)
Life Sciences$2.4 $3.0 
Other— 40.6 
Total$2.4 $43.6 

September 30, 2023December 31, 2022
 
Total Assets
Infrastructure
$893.2 $879.3 
Life Sciences14.6 15.4 
Spectrum177.8 188.2 
Other1.2 53.6 
Non-operating Corporate9.3 15.2 
Total$1,096.1 $1,151.7