Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Millions |
9 Months Ended |
12 Months Ended |
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
$ 3,064.9
|
$ 3,259.7
|
$ 4,431.2
|
$ 4,285.6
|
$ 3,879.4
|
| Transferred at Point in Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
2,247.7
|
2,472.3
|
3,348.4
|
3,205.9
|
|
| Transferred over Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
817.2
|
787.4
|
1,082.8
|
1,079.7
|
|
| Critical infrastructure & solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
1,678.1
|
1,820.4
|
$ 2,632.6
|
$ 2,451.8
|
$ 2,136.5
|
| Critical infrastructure & solutions | Restatement Adjustment |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
|
(118.4)
|
|
|
|
| Services & spares |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
964.9
|
985.4
|
|
|
|
| Services & spares | Restatement Adjustment |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
|
28.1
|
|
|
|
| Integrated rack solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
421.9
|
453.9
|
|
|
|
| Integrated rack solutions | Restatement Adjustment |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
|
90.3
|
|
|
|
| Americas |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
1,483.3
|
1,675.4
|
|
|
|
| Americas | Transferred at Point in Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
1,022.3
|
1,217.1
|
|
|
|
| Americas | Transferred over Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
461.0
|
458.3
|
|
|
|
| Americas | Critical infrastructure & solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
769.9
|
937.1
|
|
|
|
| Americas | Services & spares |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
491.0
|
505.5
|
|
|
|
| Americas | Integrated rack solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
222.4
|
232.8
|
|
|
|
| Asia Pacific |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
926.3
|
906.1
|
|
|
|
| Asia Pacific | Transferred at Point in Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
720.3
|
706.5
|
|
|
|
| Asia Pacific | Transferred over Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
206.0
|
199.6
|
|
|
|
| Asia Pacific | Critical infrastructure & solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
565.2
|
527.9
|
|
|
|
| Asia Pacific | Services & spares |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
263.5
|
268.2
|
|
|
|
| Asia Pacific | Integrated rack solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
97.6
|
110.0
|
|
|
|
| Europe, Middle East, & Africa |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
655.3
|
678.2
|
|
|
|
| Europe, Middle East, & Africa | Transferred at Point in Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
505.1
|
548.7
|
|
|
|
| Europe, Middle East, & Africa | Transferred over Time |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
150.2
|
129.5
|
|
|
|
| Europe, Middle East, & Africa | Critical infrastructure & solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
343.0
|
355.4
|
|
|
|
| Europe, Middle East, & Africa | Services & spares |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
210.4
|
211.7
|
|
|
|
| Europe, Middle East, & Africa | Integrated rack solutions |
|
|
|
|
|
| Disaggregation of Revenue [Line Items] |
|
|
|
|
|
| Net sales |
$ 101.9
|
$ 111.1
|
|
|
|