The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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