REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 1,481.1	$ 1,228.9	$ 4,036.9	$ 3,587.6
Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	1,067.9	932.8	2,914.7	2,721.0
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	413.2	296.1	1,122.2	866.6
Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	907.3	706.3	2,415.6	2,061.3
Services & spares
Disaggregation of Revenue [Line Items]
Net sales	388.0	365.4	1,094.7	1,049.1
Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	185.8	157.2	526.6	477.2
Americas
Disaggregation of Revenue [Line Items]
Net sales	712.6	537.2	1,894.9	1,603.6
Americas | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	492.7	363.5	1,323.3	1,111.1
Americas | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	219.9	173.7	571.6	492.5
Americas | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	417.3	291.9	1,080.5	877.2
Americas | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	203.6	180.2	555.9	513.4
Americas | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	91.7	65.1	258.5	213.0
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	436.1	394.6	1,176.1	1,149.9
Asia Pacific | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	343.4	316.0	909.5	913.3
Asia Pacific | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	92.7	78.6	266.6	236.6
Asia Pacific | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	265.7	234.0	692.5	690.0
Asia Pacific | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	113.3	104.4	330.8	305.8
Asia Pacific | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	57.1	56.2	152.8	154.1
Europe, Middle East, & Africa
Disaggregation of Revenue [Line Items]
Net sales	332.4	297.1	965.9	834.1
Europe, Middle East, & Africa | Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Net sales	231.8	253.3	681.9	696.6
Europe, Middle East, & Africa | Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	100.6	43.8	284.0	137.5
Europe, Middle East, & Africa | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales	224.3	180.4	642.6	494.1
Europe, Middle East, & Africa | Services & spares
Disaggregation of Revenue [Line Items]
Net sales	71.1	80.8	208.0	229.9
Europe, Middle East, & Africa | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales	$ 37.0	$ 35.9	$ 115.3	$ 110.1