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BUSINESS SEGMENTS (Summary of Certain Financial Information from Continuing Operations by Reportable Segment) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2019 | May 31, 2019 | [1] | Feb. 28, 2019 | [1] | Nov. 30, 2018 | [1] | Aug. 31, 2018 | May 31, 2018 | [1] | Feb. 28, 2018 | [1] | Nov. 30, 2017 | [1] | Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ 1,543,005 | [1] | $ 1,605,872 | $ 1,402,783 | $ 1,277,342 | $ 1,308,438 | $ 1,204,484 | $ 1,054,268 | $ 1,076,533 | $ 5,829,002 | $ 4,643,723 | $ 3,844,069
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | 424,085 | 352,221 | 235,822
Interest expense |  |  |  |  |  |  |  |  |  |  | 71,373 | 40,957 | 44,151
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 138,836 | 174,655 | 213,120
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 158,652 | 131,508 | 124,490
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 384 | 14,372 | 1,730
Total assets |  | 3,758,771 |  |  |  |  | 3,328,304 |  |  |  | 3,758,771 | 3,328,304 |
Continuing Operations |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 5,829,002 | 4,643,723 | 3,844,069
Americas Recycling |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 908,451 | 1,117,714 | 865,462
Americas Mills |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,882,994 | 1,204,181 | 917,689
Americas Fabrication |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 2,209,671 | 1,416,572 | 1,364,826
International Mill |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 815,723 | 885,919 | 636,402
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 12,163 | 19,337 | 59,690
Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 5,829,002 | 4,643,723 | 3,844,069
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | 424,085 | 352,221 | 235,822
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 71,373 | 40,957 | 44,151
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 138,836 | 171,367 | 213,074
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 384 | 14,372 | 1,730
Total assets | [3] | 3,758,771 |  |  |  |  | 3,328,304 |  |  |  | 3,758,771 | 3,328,304 | 2,975,131
Segments | Americas Recycling |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,146,546 | 1,365,429 | 1,011,500
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | 42,124 | 68,694 | 33,541
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 3,097 | 3,605 | 2,979
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 22,560 | 8,592 | 7,148
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 16,825 | 17,246 | 15,501
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 0 | 180 | 559
Total assets | [3] | 257,517 |  |  |  |  | 291,838 |  |  |  | 257,517 | 291,838 | 240,371
Segments | Americas Mills |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 3,068,274 | 1,996,903 | 1,565,454
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | 545,215 | 301,805 | 224,183
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 16,186 | 5,317 | (3,394)
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 54,069 | 121,029 | 172,738
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 91,326 | 61,512 | 49,419
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 0 | 8 | 0
Total assets | [3] | 1,667,366 |  |  |  |  | 1,115,339 |  |  |  | 1,667,366 | 1,115,339 | 933,022
Segments | Americas Fabrication |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 2,223,379 | 1,427,882 | 1,375,928
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | (123,014) | (39,394) | 27,259
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 27,656 | 14,295 | 9,899
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 12,490 | 14,386 | 15,495
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 17,567 | 13,537 | 13,400
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 369 | 14,157 | 0
Total assets | [3] | 1,106,420 |  |  |  |  | 739,151 |  |  |  | 1,106,420 | 739,151 | 683,609
Segments | International Mill |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 817,048 | 887,038 | 637,273
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | 100,102 | 131,720 | 76,068
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 2,493 | 2,699 | 3,079
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 40,337 | 23,552 | 12,603
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 25,993 | 27,255 | 25,830
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 15 | 27 | 150
Total assets | [3] | 464,177 |  |  |  |  | 485,548 |  |  |  | 464,177 | 485,548 | 464,428
Segments | Corporate |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | (1,426,245) | (1,033,529) | (746,086)
Adjusted operating profit (loss) |  |  |  |  |  |  |  |  |  |  | (140,342) | (110,604) | (125,229)
Interest expense | [2] |  |  |  |  |  |  |  |  |  | 21,941 | 15,041 | 31,588
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 9,380 | 3,808 | 5,090
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 6,941 | 11,958 | 20,340
Impairment of assets |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 1,021
Total assets | [3] | $ 263,291 |  |  |  |  | $ 696,428 |  |  |  | 263,291 | 696,428 | 653,701
Intersegment | Continuing Operations |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intersegment | Americas Recycling |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 238,095 | 247,715 | 146,038
Intersegment | Americas Mills |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,185,280 | 792,722 | 647,765
Intersegment | Americas Fabrication |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 13,708 | 11,310 | 11,102
Intersegment | International Mill |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | 1,325 | 1,119 | 871
Intersegment | Corporate |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  | $ (1,438,408) | $ (1,052,866) | $ (805,776)
[1] | Excludes discontinued operations.
[2] | Includes intercompany interest expense (income) in the segments, which is eliminated within Corporate and Other.
[3] | Total assets listed in Corporate and Other includes assets from discontinued operations

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