GOODWILL AND OTHER INTANGIBLES - Changes in goodwill (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Goodwill | |||
| Balance, December 31, 2019 | $ 605.8 | $ 634.0 | $ 596.1 |
| Foreign currency translation | 5.9 | (28.2) | (11.1) |
| Measurement period adjustments | 12.3 | ||
| Acquisitions | 36.7 | ||
| Balance, September 30, 2020 | 611.7 | 605.8 | 634.0 |
| Americas | |||
| Goodwill | |||
| Balance, December 31, 2019 | 371.5 | 396.5 | 356.4 |
| Foreign currency translation | (1.3) | (25.0) | 1.9 |
| Measurement period adjustments | 9.0 | ||
| Acquisitions | 29.2 | ||
| Balance, September 30, 2020 | 370.2 | 371.5 | 396.5 |
| Asia Pacific | |||
| Goodwill | |||
| Balance, December 31, 2019 | 50.3 | 50.9 | 53.1 |
| Foreign currency translation | 3.0 | (0.6) | (2.5) |
| Measurement period adjustments | 0.3 | ||
| Balance, September 30, 2020 | 53.3 | 50.3 | 50.9 |
| Europe, Middle East & Africa | |||
| Goodwill | |||
| Balance, December 31, 2019 | $ 184.0 | 186.6 | 186.6 |
| Foreign currency translation | (2.6) | (10.5) | |
| Measurement period adjustments | 3.0 | ||
| Acquisitions | 7.5 | ||
| Balance, September 30, 2020 | $ 184.0 | $ 186.6 | |