v3.26.1
Purchase Commitments (Details)
$ in Millions
Jun. 30, 2026
USD ($)
Capital Addition Purchase Commitments Total Revenue Equipment [Member]  
Long-term Purchase Commitment [Line Items]  
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year $ 402.0
Purchase Obligation, to be Paid, Year One 402.0
Purchase Obligation, to be Paid, Year Two 0.0
Purchase Obligation, to be Paid, Year Three 0.0
Purchase Obligation, Due in Fourth and Fifth Year 0.0
Purchase Obligation, Due after Fifth Year 0.0
Capital Addition Purchase Commitments of Tractors [Member]  
Long-term Purchase Commitment [Line Items]  
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year 270.4
Capital Addition Purchase Commitments Non revenue equipment [Member]  
Long-term Purchase Commitment [Line Items]  
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year 79.9
Purchase Obligation, to be Paid, Year One 79.9
Purchase Obligation, Due in Second and Third Year 55.1
Purchase Obligation, Due in Fourth and Fifth Year 6.3
Purchase Obligation, Due after Fifth Year $ 0.0