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Segment Reporting - Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Feb. 28, 2013 | Feb. 29, 2012 | Feb. 28, 2013 | Feb. 29, 2012 | Aug. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 9,882,378 | $ 8,843,812 | $ 21,592,316 | $ 18,577,971 |
Cost of goods sold | 9,411,731 | 8,612,235 | 20,576,151 | 17,706,387 |
Gross profit | 470,647 | 231,577 | 1,016,165 | 871,584 |
Marketing, general and administrative | 134,680 | 126,556 | 259,162 | 239,076 |
Operating earnings | 335,967 | 105,021 | 757,003 | 632,508 |
Loss (gain) on investments | (45) | 484 | (45) | 446 |
Interest, net | 53,385 | 34,631 | 120,595 | 55,438 |
Equity income from investments | (16,760) | (19,952) | (44,832) | (44,081) |
Income before income taxes | 299,387 | 89,858 | 681,285 | 620,705 |
Intersegment Revenue | 0 | 0 | 0 | 0 |
Goodwill | 88,147 | 78,201 | 88,147 | 78,201 | 81,700
Capital expenditures |  |  | 264,332 | 197,887 |
Depreciation and amortization |  |  | 116,912 | 104,732 |
Total identifiable assets | 12,953,201 | 11,366,995 | 12,953,201 | 11,366,995 | 13,423,151
Energy |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 2,815,736 | 2,918,852 | 6,139,964 | 6,315,826 |
Cost of goods sold | 2,505,801 | 2,821,733 | 5,496,643 | 5,786,901 |
Gross profit | 309,935 | 97,119 | 643,321 | 528,925 |
Marketing, general and administrative | 41,183 | 38,268 | 77,654 | 71,171 |
Operating earnings | 268,752 | 58,851 | 565,667 | 457,754 |
Loss (gain) on investments |  |  |  |  |
Interest, net | 32,388 | 18,803 | 78,171 | 22,305 |
Equity income from investments | 2,155 | (2,053) | 271 | (3,943) |
Income before income taxes | 234,209 | 42,101 | 487,225 | 439,392 |
Intersegment Revenue | (102,957) | (99,098) | (236,563) | (229,228) |
Goodwill | 1,165 | 1,165 | 1,165 | 1,165 |
Capital expenditures |  |  | 173,669 | 126,200 |
Depreciation and amortization |  |  | 57,256 | 53,031 |
Total identifiable assets | 3,648,852 | 3,803,977 | 3,648,852 | 3,803,977 |
Ag Business |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 7,150,228 | 6,008,402 | 15,651,969 | 12,458,223 |
Cost of goods sold | 7,009,448 | 5,890,328 | 15,317,563 | 12,150,199 |
Gross profit | 140,780 | 118,074 | 334,406 | 308,024 |
Marketing, general and administrative | 74,401 | 71,688 | 145,388 | 133,531 |
Operating earnings | 66,379 | 46,386 | 189,018 | 174,493 |
Loss (gain) on investments | (45) | 484 | (45) | 446 |
Interest, net | 17,826 | 12,837 | 36,038 | 26,751 |
Equity income from investments | (1,792) | (3,088) | (9,739) | (10,250) |
Income before income taxes | 50,390 | 36,153 | 162,764 | 157,546 |
Goodwill | 80,084 | 70,138 | 80,084 | 70,138 |
Capital expenditures |  |  | 87,466 | 68,716 |
Depreciation and amortization |  |  | 51,072 | 42,242 |
Total identifiable assets | 7,493,776 | 5,694,095 | 7,493,776 | 5,694,095 |
Corporate and Other |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 19,371 | 15,656 | 36,946 | 33,150 |
Cost of goods sold | (561) | (728) | (1,492) | (1,485) |
Gross profit | 19,932 | 16,384 | 38,438 | 34,635 |
Marketing, general and administrative | 19,096 | 16,600 | 36,120 | 34,374 |
Operating earnings | 836 | (216) | 2,318 | 261 |
Loss (gain) on investments |  |  |  |  |
Interest, net | 3,171 | 2,991 | 6,386 | 6,382 |
Equity income from investments | (17,123) | (14,811) | (35,364) | (29,888) |
Income before income taxes | 14,788 | 11,604 | 31,296 | 23,767 |
Goodwill | 6,898 | 6,898 | 6,898 | 6,898 |
Capital expenditures |  |  | 3,197 | 2,971 |
Depreciation and amortization |  |  | 8,584 | 9,459 |
Total identifiable assets | 1,810,573 | 1,868,923 | 1,810,573 | 1,868,923 |
Reconciling Amounts |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | (102,957) | (99,098) | (236,563) | (229,228) |
Cost of goods sold | (102,957) | (99,098) | (236,563) | (229,228) |
Gross profit | 0 | 0 | 0 | 0 |
Operating earnings | 0 | 0 | 0 | 0 |
Income before income taxes | 0 | 0 | 0 | 0 |
Intersegment Revenue | $ 102,957 | $ 99,098 | $ 236,563 | $ 229,228 |

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