Goodwill and Other Intangibles - Narrative (Details) $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2020
USD ($)
|
Jun. 30, 2020
USD ($)
|
Sep. 30, 2019
USD ($)
|
Sep. 30, 2020
USD ($)
reporting_unit
|
Sep. 30, 2019
USD ($)
|
Dec. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| Finite-Lived Intangible Assets [Line Items] | ||||||||
| Amortization | $ 35.8 | $ 36.9 | $ 107.8 | $ 109.2 | $ 145.8 | $ 156.6 | $ 224.8 | |
| Impairment charge | 9.4 | $ 0.0 | $ 21.7 | $ 0.0 | ||||
| Number of reporting units | reporting_unit | 3 | |||||||
| Capitalized software | ||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||
| Asset impairment | $ 12.3 | |||||||
| Technology-Based Intangible Assets and Trademarks | ||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||
| Impairment charge | $ 9.4 | |||||||