Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Mastery Logistics Systems, Inc.
Schedule of Equity Method Investments [Line Items]
Fair value of investment	$ 38.2		$ 38.2
Cumulative unrealized gain on interest in investment	28.2
Unrealized loss on interest in investment	0.0	$ 0.0
Investments in Autonomous Technology Companies
Schedule of Equity Method Investments [Line Items]
Unrealized loss on interest in investment	$ 9.8	$ 0.0