Segment and Geographical Area Information Segment and Geographical Area Information - Operating Lease Assets by Geographical Area (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	$ 147.0	$ 144.8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	83.3	86.4
Total International
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	63.7	58.4
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	16.3	17.9
Continental Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	14.9	6.3
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	5.6	5.8
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	7.3	7.5
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	18.9	20.2
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated operating lease assets	$ 0.7	$ 0.7