SEGMENT INFORMATION - Business Segments (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 |
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
$ 3,064.9
|
$ 3,259.7
|
$ 4,431.2
|
$ 4,285.6
|
$ 3,879.4
|
| Americas |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
2,229.1
|
2,145.7
|
|
| Asia Pacific |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
1,278.0
|
1,244.2
|
|
| Europe, Middle East, & Africa |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
924.1
|
895.7
|
|
| Operating segment |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
3,160.6
|
3,394.5
|
4,605.4
|
4,460.5
|
4,044.3
|
| Operating segment | Americas |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
2,251.4
|
2,175.6
|
1,886.7
|
| Operating segment | Asia Pacific |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
1,378.0
|
1,346.9
|
1,239.5
|
| Operating segment | Europe, Middle East, & Africa |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
|
|
976.0
|
938.0
|
918.1
|
| Eliminations |
|
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
|
| Revenue |
$ 95.7
|
$ 134.8
|
$ (174.2)
|
$ (174.9)
|
$ (164.9)
|