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Operating Segments and Related Information (Tables)
12 Months Ended
Dec. 31, 2023
Segment Reporting [Abstract]  
Schedules of Concentration of Risk, by Risk Factor
The Company's revenue concentrations of 10% and greater were as follows:

Year Ended December 31,
Segment20232022
Customer AInfrastructure29.2%23.8%
Customer BInfrastructure11.4%*
* Less than 10% revenue concentration
Schedule of Company's Operating Segments
Summarized financial information with respect to the Company’s operating segments is as follows (in millions):

 Year Ended December 31,
 20232022
Revenue
Infrastructure
$1,397.2 $1,594.3 
Life Sciences3.3 4.3 
Spectrum22.5 38.7 
Total revenue$1,423.0 $1,637.3 

 Year Ended December 31,
 20232022
Income (loss) from operations
Infrastructure
$64.4 $57.5 
Life Sciences(15.0)(20.1)
Spectrum(3.4)(3.8)
Other(3.1)(0.6)
Non-Operating Corporate
(16.4)(19.6)
Total income from operations
$26.5 $13.4 

 Year Ended December 31,
20232022
Reconciliation of the consolidated segment income from operations to consolidated loss from operations before income taxes:
Income from operations$26.5 $13.4 
Interest expense(68.2)(52.0)
Loss from equity investees(9.4)(1.3)
Other income (expense), net16.7 (1.2)
Loss from operations before income taxes$(34.4)$(41.1)

 Year Ended December 31,
 20232022
Depreciation and Amortization
Infrastructure
$14.4 $21.0 
Infrastructure recognized within cost of revenue
15.7 15.0 
Total Infrastructure30.1 36.0 
Life Sciences0.5 0.3 
Life Sciences recognized within cost of revenue
0.1 — 
Total Life Sciences
0.6 0.3 
Spectrum5.2 5.8 
Non-Operating Corporate
0.1 0.1 
Total depreciation and amortization$36.0 $42.2 

Year Ended December 31,
 20232022
Capital Expenditures (*)
Infrastructure
$16.6 $16.5 
Life Sciences0.5 0.8 
Spectrum1.0 3.3 
Non-Operating Corporate
0.3 0.1 
Total$18.4 $20.7 
(*) 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
December 31,
 20232022
Investments
Life Sciences$1.8 $7.6 
Other— 51.9 
Total$1.8 $59.5 

December 31,
20232022
Equity Method Investments (included in Investments above)
Life Sciences$0.9 $3.0 
Other— 40.6 
Total$0.9 $43.6 

December 31,
 20232022
Total Assets
Infrastructure
$851.4 $879.3 
Life Sciences8.3 15.4 
Spectrum176.6 188.2 
Other— 53.6 
Non-Operating Corporate
7.3 15.2 
Total$1,043.6 $1,151.7