Business Segments, Geographic Information, and Major Customers - Balance Sheet Items (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts receivable, net:
Accounts receivable	$ 2,432.6	$ 2,735.5
Total assets:
Total assets	6,731.8	7,375.3
Operating Segments
Total assets:
Total assets	6,448.5	7,083.5
Corporate
Total assets:
Total assets	283.3	291.8
Aviation | Operating Segments
Accounts receivable, net:
Accounts receivable	1,166.2	1,285.7
Total assets:
Total assets	2,548.2	2,767.4
Land | Operating Segments
Accounts receivable, net:
Accounts receivable	651.1	767.4
Total assets:
Total assets	2,970.6	3,323.4
Marine | Operating Segments
Accounts receivable, net:
Accounts receivable	615.3	682.4
Total assets:
Total assets	$ 929.6	$ 992.8