REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 1,742.6	$ 1,481.1	$ 4,997.8	$ 4,036.9
Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	1,279.2	1,067.9	3,710.9	2,914.7
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	463.4	413.2	1,286.9	1,122.2
Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	1,138.3	907.3	3,214.2	2,415.6
Services & spares
Disaggregation of Revenue [Line Items]
Net sales	393.3	388.0	1,168.1	1,094.7
Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	211.0	185.8	615.5	526.6
Americas
Disaggregation of Revenue [Line Items]
Net sales	1,003.2	712.6	2,824.9	1,894.9
Americas | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	772.8	492.7	2,164.2	1,323.3
Americas | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	230.4	219.9	660.7	571.6
Americas | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	670.8	417.3	1,868.2	1,080.5
Americas | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	206.2	203.6	602.5	555.9
Americas | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	126.2	91.7	354.2	258.5
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	388.6	436.1	1,097.4	1,176.1
Asia Pacific | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	296.0	343.4	830.6	909.5
Asia Pacific | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	92.6	92.7	266.8	266.6
Asia Pacific | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	244.3	265.7	646.9	692.5
Asia Pacific | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	103.1	113.3	317.3	330.8
Asia Pacific | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	41.2	57.1	133.2	152.8
Europe, Middle East, & Africa
Disaggregation of Revenue [Line Items]
Net sales	350.8	332.4	1,075.5	965.9
Europe, Middle East, & Africa | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	210.4	231.8	716.1	681.9
Europe, Middle East, & Africa | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	140.4	100.6	359.4	284.0
Europe, Middle East, & Africa | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	223.2	224.3	699.1	642.6
Europe, Middle East, & Africa | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	84.0	71.1	248.3	208.0
Europe, Middle East, & Africa | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	$ 43.6	$ 37.0	$ 128.1	$ 115.3