Business Segments - Balance Sheet Items (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Accounts receivable, net:
Allowance for credit losses	$ 19.1	$ 26.1
Accounts receivable	3,954.7	2,355.3
Total assets:
Total assets	8,795.7	5,942.4
Corporate
Total assets:
Total assets	412.4	507.9
Aviation segment
Accounts receivable, net:
Allowance for credit losses	11.4	18.4
Accounts receivable	1,607.0	972.9
Aviation segment | Operating Segments
Total assets:
Total assets	3,288.3	2,305.6
Land segment
Accounts receivable, net:
Allowance for credit losses	4.0	3.8
Accounts receivable	1,208.6	664.7
Land segment | Operating Segments
Total assets:
Total assets	3,632.9	2,106.1
Marine segment
Accounts receivable, net:
Allowance for credit losses	3.8	3.9
Accounts receivable	1,139.1	717.7
Marine segment | Operating Segments
Total assets:
Total assets	$ 1,462.2	$ 1,022.7