Current Expected Credit Losses - Year of Origination of Financing Receivables (Details) $ in Millions	Dec. 31, 2020 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
2020	$ 3.0
2019	3.5
2018	8.1
2017	6.4
2016	1.3
Prior	63.0
Total	85.3
Notes receivable, short-term
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1.5
2019	2.6
2018	8.1
2017	6.4
2016	0.0
Prior	0.1
Total	18.7
Lease Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2020	1.5
2019	0.9
2018	0.0
2017	0.0
2016	1.3
Prior	19.0
Total	22.7
Equipment Receivables
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0.0
2019	0.0
2018	0.0
2017	0.0
2016	0.0
Prior	43.9
Total	$ 43.9