v3.26.1
Business Segment Information - Significant expenses for each segment (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Business Segment Information      
Number of reportable segments not disclosed true    
Sales $ 3,308.0 $ 2,780.5 $ 2,318.9
Cost of Sales 2,686.0 2,252.8 1,876.6
Selling, General and Administrative 349.3 347.7 312.2
Operating Income 277.8 185.2 129.2
Bargain purchase gain 29.5    
Pension settlement charge     (26.7)
Gain on sale of headquarters building 9.8    
Gain (loss) related to sale and exit of businesses, net 1.4 (72.4) (2.8)
Other expense, net (2.1) (0.3) (0.4)
Interest expense (72.1) (75.4) (43.2)
Interest income 1.6 1.8 2.2
Income before income taxes 245.9 38.9 58.3
Inter-segment Sales      
Business Segment Information      
Sales 113.2 111.8 97.2
Total Sales      
Business Segment Information      
Sales 3,421.2 2,892.3 2,416.1
Reportable segment, aggregation before corporate and other operating segment      
Business Segment Information      
Sales 3,308.0 2,780.5 2,318.9
Cost of Sales 2,685.8 2,250.3 1,876.8
Selling, General and Administrative 301.7 250.4 253.0
Other Segment Items (7.0) (4.7) (0.6)
Operating Income 327.5 284.5 189.7
Parts Supply      
Business Segment Information      
Sales 1,487.7 1,099.6 967.0
Cost of Sales 1,192.9 868.8 758.4
Selling, General and Administrative 116.0 76.2 98.3
Other Segment Items (7.4) (2.2) 0.5
Operating Income 186.2 156.8 109.8
Parts Supply | Inter-segment Sales      
Business Segment Information      
Sales 32.6 19.8 8.6
Parts Supply | Total Sales      
Business Segment Information      
Sales 1,520.3 1,119.4 975.6
Repair, Engineering, and Software      
Business Segment Information      
Sales 1,080.8 931.0 681.3
Cost of Sales 862.8 724.9 534.7
Selling, General and Administrative 132.7 124.8 99.1
Other Segment Items 0.7 (2.7) (0.4)
Operating Income 84.6 84.0 47.9
Repair, Engineering, and Software | Inter-segment Sales      
Business Segment Information      
Sales 72.7 90.2 87.7
Repair, Engineering, and Software | Total Sales      
Business Segment Information      
Sales 1,153.5 1,021.2 769.0
Government Solutions      
Business Segment Information      
Sales 502.3 495.4 451.7
Cost of Sales 405.8 424.1 386.9
Selling, General and Administrative 39.8 36.2 40.6
Other Segment Items     (0.6)
Operating Income 56.7 35.1 24.8
Government Solutions | Inter-segment Sales      
Business Segment Information      
Sales 4.2 1.3 0.9
Government Solutions | Total Sales      
Business Segment Information      
Sales 506.5 496.7 452.6
Legacy Commercial Programs      
Business Segment Information      
Sales 237.2 254.5 218.9
Cost of Sales 224.3 232.5 196.8
Selling, General and Administrative 13.2 13.2 15.0
Other Segment Items (0.3) 0.2 (0.1)
Operating Income   8.6 7.2
Legacy Commercial Programs | Inter-segment Sales      
Business Segment Information      
Sales 3.7 0.5  
Legacy Commercial Programs | Total Sales      
Business Segment Information      
Sales 240.9 255.0 218.9
Corporate and other      
Business Segment Information      
Operating Income $ (49.7) $ (99.3) $ (60.5)