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Revenues (Tables)
12 Months Ended
Aug. 31, 2019
Disaggregation of Revenue [Abstract]  
Disaggregation of Revenue [Table Text Block]
Reportable Segment*
 
ASC 606
 
ASC 815
 
Other Guidance
 
Total Revenues
 
 
(Dollars in thousands)
Energy
 
$
6,393,075

 
$
726,001

 
$

 
$
7,119,076

Ag
 
6,319,304

 
18,268,977

 
131,791

 
24,720,072

Corporate and Other
 
20,262

 

 
41,043

 
61,305

Total revenues
 
$
12,732,641

 
$
18,994,978

 
$
172,834

 
$
31,900,453