Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales		$ 4,998.1	$ 4,370.6	$ 4,431.2
E&I Acquisition
Disaggregation of Revenue [Line Items]
Net sales		67.4
Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		3,838.4	3,249.3	3,348.4
Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		1,159.7	1,121.3	1,082.8
Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales		2,900.4	2,434.6	2,467.5
Critical infrastructure & solutions | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Net sales			(23.1)
Services & spares
Disaggregation of Revenue [Line Items]
Net sales		1,438.7	1,317.1	1,338.1
Services & spares | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Net sales			(7.7)
Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales		659.0	618.9	625.6
Integrated rack solutions | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Net sales			30.8
Americas
Disaggregation of Revenue [Line Items]
Net sales		2,187.4	2,040.6	2,229.1
Americas | E&I Acquisition
Disaggregation of Revenue [Line Items]
Net sales	$ 21.7
Americas | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		1,514.6	1,418.9	1,592.4
Americas | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		672.8	621.7	636.7
Americas | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales		1,189.6	1,074.2	1,225.6
Americas | Services & spares
Disaggregation of Revenue [Line Items]
Net sales		705.1	662.6	689.8
Americas | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales		292.7	303.8	313.7
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales		1,609.0	1,368.4	1,278.0
Asia Pacific | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		1,304.3	1,078.5	1,007.1
Asia Pacific | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		304.7	289.9	270.9
Asia Pacific | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales		971.7	830.7	755.5
Asia Pacific | Services & spares
Disaggregation of Revenue [Line Items]
Net sales		421.5	366.3	361.1
Asia Pacific | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales		215.8	171.4	161.4
Europe, Middle East, & Africa
Disaggregation of Revenue [Line Items]
Net sales		1,201.7	961.6	924.1
Europe, Middle East, & Africa | E&I Acquisition
Disaggregation of Revenue [Line Items]
Net sales	$ 45.7
Europe, Middle East, & Africa | Products and services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales		1,019.5	751.9	748.9
Europe, Middle East, & Africa | Products and services transferred over time
Disaggregation of Revenue [Line Items]
Net sales		182.2	209.7	175.2
Europe, Middle East, & Africa | Critical infrastructure & solutions
Disaggregation of Revenue [Line Items]
Net sales		739.1	529.7	486.4
Europe, Middle East, & Africa | Services & spares
Disaggregation of Revenue [Line Items]
Net sales		312.1	288.2	287.2
Europe, Middle East, & Africa | Integrated rack solutions
Disaggregation of Revenue [Line Items]
Net sales		$ 150.5	$ 143.7	$ 150.5