Business Segments - Income Statement Items (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Revenue	$ 12,382.0	$ 5,957.9
Income from operations:
Income from operations	41.3	37.6
Corporate overhead - unallocated
Income from operations:
Income from operations	(22.8)	(24.5)
Aviation segment
Revenue:
Revenue	5,010.5	2,095.0
Aviation segment | Operating Segments
Income from operations:
Income from operations	7.5	23.0
Land segment
Revenue:
Revenue	4,380.8	2,188.2
Land segment | Operating Segments
Income from operations:
Income from operations	33.4	32.8
Marine segment
Revenue:
Revenue	2,990.6	1,674.7
Marine segment | Operating Segments
Income from operations:
Income from operations	$ 23.1	$ 6.4