Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,156.4	$ 1,098.4
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	856.2	837.1
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	300.2	261.3
Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	664.9	627.9
Services & spares
Disaggregation of Revenue [Line Items]
Net sales	334.2	321.8
Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	157.3	148.7
Americas
Disaggregation of Revenue [Line Items]
Net sales	535.1	501.5
Americas | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	378.1	360.5
Americas | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	157.0	141.0
Americas | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	294.3	279.2
Americas | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	164.7	154.2
Americas | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	76.1	68.1
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	332.8	357.4
Asia Pacific | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	256.4	281.6
Asia Pacific | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	76.4	75.8
Asia Pacific | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	183.8	216.3
Asia Pacific | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	104.6	95.5
Asia Pacific | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	44.4	45.6
Europe, Middle East, & Africa
Disaggregation of Revenue [Line Items]
Net sales	288.5	239.5
Europe, Middle East, & Africa | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	221.7	195.0
Europe, Middle East, & Africa | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	66.8	44.5
Europe, Middle East, & Africa | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	186.8	132.4
Europe, Middle East, & Africa | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	64.9	72.1
Europe, Middle East, & Africa | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	$ 36.8	$ 35.0