Revenue - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 394.8	$ 170.5	$ 810.4	$ 538.9
Infrastructure
Segment Reporting Information [Line Items]
Revenue	383.0	160.7	776.3	508.9
Spectrum
Segment Reporting Information [Line Items]
Revenue	10.2	9.7	31.3	29.3
Life Sciences
Segment Reporting Information [Line Items]
Revenue	1.6	0.0	2.8	0.0
Operating Segments | Infrastructure
Segment Reporting Information [Line Items]
Revenue	383.0	160.8	776.3	509.6
Operating Segments | Spectrum
Segment Reporting Information [Line Items]
Revenue	10.2	9.7	31.3	29.3
Operating Segments | Life Sciences
Segment Reporting Information [Line Items]
Revenue	$ 1.6	$ 0.0	$ 2.8	$ 0.0