Revenues Contract Balances (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Trade Receivables, net	$ 93.0				$ 117.2
Contracts with Customers, Asset, Gross, Noncurrent	2.5				1.5
Contract Liability Beginning Balance	11.8	[1]	$ 9.2	[2]
Revenues recognized that were included in the contract liability balance at the beginning of the period	(3.3)		(1.4)
Increases due to cash received, excluding amounts recognized as revenues during the period	9.0		3.6
Contract Liability Ending Balance	17.5	[1]	11.4	[2]
Contract with Customer, Liability, Current	6.0		1.2		2.2	$ 0.5
Contract with Customer, Liability, Noncurrent	$ 11.5		$ 10.2		$ 9.6	$ 8.7

[1] As of September 30, 2020, and December 31, 2019, $6.0 million and $2.2 million were recorded in Deferred income (current portion) and $11.5 million and $9.6 million were recorded in Other Liabilities (noncurrent portion).

[2] As of September 30, 2019, and December 31, 2018, $1.2 million and $0.5 million were recorded in Deferred income (current portion) and $10.2 million and $8.7 million were recorded in Other Liabilities (noncurrent portion).