Revenue - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 243.8	$ 181.8	$ 415.6	$ 368.4
Infrastructure
Segment Reporting Information [Line Items]
Revenue	232.0	171.7	393.3	348.2
Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Revenue	232.0	172.3	393.3	348.8
Operating Segments | Spectrum
Segment Reporting Information [Line Items]
Revenue	10.6	9.5	21.1	19.6
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenue	$ 1.2	$ 0.0	$ 1.2	$ 0.0