| Operating revenues | 5,290.5a | 5,498.9a | 6,604.4a |
| Operating expenses | — | — | — |
| Purchased transportation | -1,991.3a | -2,184.5a | -2,902.9a |
| Salaries, wages, and benefits | -1,409.7a | -1,359.1a | -1,376a |
| Fuel and fuel taxes | -398.2a | -437.4a | -521a |
| Depreciation and amortization | -413.7a | -382.5a | -350a |
| Operating supplies and expenses-net | -636.5a | -576a | -534a |
| Insurance and related expenses | -151.5a | -114.3a | -103a |
| Other general expenses | -124.4a | -148.7a | -217.1a |
| Total operating expenses | -5,125.3a | -5,202.5a | -6,004a |
| Income from operations | 165.2a | 296.4a | 600.4a |
| Other expenses (income) | — | — | — |
| Interest income | -4.3a | -7a | -2.9a |
| Interest expense | -16.6a | -14.2a | -9.6a |
| Other expenses (income)-net | 0.7a | -16.9a | -10.3a |
| Total other expenses (income)-net | 13a | -9.7a | -3.6a |
| Income before income taxes | 152.2a | 306.1a | 604a |
| Provision for income taxes | -35.2a | -67.6a | -146.2a |
| Net income | 117a | 238.5a | 457.8a |