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BUSINESS SEGMENTS (Summary of Certain Financial Information from Continuing Operations by Reportable Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
May 31, 2016 | May 31, 2015 | May 31, 2016 | May 31, 2015 | Aug. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | $ 1,227,390 | $ 1,506,002 | $ 3,401,946 | $ 4,577,109 |
Adjusted operating profit (loss) |  | 60,940 | 82,168 | 146,969 | 187,044 |
Total assets |  | 3,110,686 |  | 3,110,686 |  | $ 3,445,588
Continuing Operations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 1,227,390 | 1,506,002 | 3,401,946 | 4,577,109 |
Adjusted operating profit (loss) |  | 60,940 | 82,168 | 146,969 | 187,044 |
Total assets | [1] | 3,107,760 |  | 3,107,760 |  | 3,414,063
Americas Recycling |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 156,352 | 194,081 | 430,829 | 691,382 |
Adjusted operating profit (loss) |  | (1,978) | (3,651) | (16,171) | (15,260) |
Total assets | [1] | 229,557 |  | 229,557 |  | 261,676
Americas Mills |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 227,736 | 244,632 | 634,926 | 796,218 |
Adjusted operating profit (loss) |  | 54,976 | 63,320 | 164,739 | 195,438 |
Total assets | [1] | 758,336 |  | 758,336 |  | 738,669
Americas Fabrication |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 382,607 | 415,763 | 1,096,049 | 1,165,679 |
Adjusted operating profit (loss) |  | 22,794 | 13,720 | 58,964 | 3,770 |
Total assets | [1] | 656,055 |  | 656,055 |  | 713,860
International Mill |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 141,043 | 156,286 | 368,949 | 472,364 |
Adjusted operating profit (loss) |  | 5,467 | 6,146 | 10,189 | 11,188 |
Total assets | [1] | 360,734 |  | 360,734 |  | 403,706
International Marketing and Distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 315,067 | 494,639 | 867,084 | 1,447,316 |
Adjusted operating profit (loss) |  | 892 | 25,615 | (3,570) | 49,669 |
Total assets | [1] | 591,105 |  | 591,105 |  | 798,914
Corporate |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 4,585 | 601 | 4,109 | 4,150 |
Adjusted operating profit (loss) |  | (22,542) | (19,502) | (69,415) | (55,513) |
Total assets | [1] | 1,015,991 |  | 1,015,991 |  | 1,049,815
Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 0 | 0 | 0 | 0 |
Adjusted operating profit (loss) |  | 1,331 | (3,480) | 2,233 | (2,248) |
Total assets | [1] | (504,018) |  | (504,018) |  | $ (552,577)
Segments | Continuing Operations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 1,227,390 | 1,506,002 | 3,401,946 | 4,577,109 |
Segments | Americas Recycling |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 182,477 | 225,096 | 510,030 | 800,234 |
Segments | Americas Mills |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 396,481 | 446,821 | 1,117,442 | 1,400,517 |
Segments | Americas Fabrication |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 385,080 | 417,895 | 1,103,538 | 1,174,793 |
Segments | International Mill |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 141,438 | 156,318 | 369,344 | 472,396 |
Segments | International Marketing and Distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 319,604 | 518,244 | 879,517 | 1,521,288 |
Segments | Corporate |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 4,585 | 601 | 4,109 | 4,150 |
Segments | Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | (202,275) | (258,973) | (582,034) | (796,269) |
Intersegment | Continuing Operations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 0 | 0 | 0 | 0 |
Intersegment | Americas Recycling |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 26,125 | 31,015 | 79,201 | 108,852 |
Intersegment | Americas Mills |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 168,745 | 202,189 | 482,516 | 604,299 |
Intersegment | Americas Fabrication |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 2,473 | 2,132 | 7,489 | 9,114 |
Intersegment | International Mill |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 395 | 32 | 395 | 32 |
Intersegment | International Marketing and Distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 4,537 | 23,605 | 12,433 | 73,972 |
Intersegment | Corporate |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | 0 | 0 | 0 | 0 |
Intersegment | Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales |  | $ (202,275) | $ (258,973) | $ (582,034) | $ (796,269) |
[1] | Excludes total assets from discontinued operations of $2.9 million at May 31, 2016 and $31.5 million at August 31, 2015.

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