| Sales | 4,362.1a | 4,173.7a | 3,836a |
| Cost of sales | -3,463.9a | -3,371.1a | -3,121.8a |
| Gross profit | 898.2a | 802.6a | 714.2a |
| Selling and administrative expenses | -342.3a | -328.1a | -297.5a |
| Restructuring charges (credits) | -4.1a | -7.7a | -4.8a |
| Loss (gain) on asset sales and sales of businesses, net | -57.1a | 0.4a | 105.4a |
| Operating income | 608.9a | 466.4a | 316.1a |
| Nonoperating retirement benefit income (expense) | -29a | -79.7a | 138.4a |
| Interest expense, net | -108.2a | -92.8a | -87.4a |
| Other income (loss), net | 14.4a | 1.3a | -12.5a |
| Income before income taxes | 486.1a | 295.2a | 354.6a |
| Income tax provision (benefit) | -103.4a | -128.2a | -15.5a |
| Net income | 382.7a | 423.4a | 339.1a |
| Less: Net income attributable to noncontrolling interests | 14.9a | 12.6a | 15.6a |
| Net income attributable to ATI | 367.8a | 410.8a | 323.5a |