Segment Information - Schedule of Sales by Products and Services Offering (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from External Customer [Line Items]
Net sales	$ 1,098.4	$ 897.3
Critical infrastructure & solutions
Revenue from External Customer [Line Items]
Net sales	627.9	461.5
Services & spares
Revenue from External Customer [Line Items]
Net sales	321.8	306.3
Integrated rack solutions
Revenue from External Customer [Line Items]
Net sales	$ 148.7	$ 129.5