Revenue - Deferred Revenue (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Deferred revenue - current	$ 44.7	$ 49.0
Deferred revenue - noncurrent	15.0	32.2
Total Deferred Revenue	59.7	81.2
Deferred revenue	59.7	$ 81.2
Operating Segments | HST
Disaggregation of Revenue [Line Items]
Total Deferred Revenue	17.9
Deferred revenue	$ 17.9