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Business Combinations Asset Acquisition - Assets and Liabilties (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Aug. 01, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2024	Dec. 31, 2023
Business Acquisition
Goodwill				$ 331.7	$ 331.7
M&M Transport Services, Inc.
Business Acquisition
Goodwill				$ 103.5
Date of acquisition	Aug. 01, 2023
Percentage of business acquired	100.00%
Fair value of consideration transferred	$ 243.8
Pro forma operating revenues		$ 1,361.6	$ 4,197.8

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