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Commitments, Contingencies And Legal Matters (Tables)
12 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]  
Unrecorded Unconditional Purchase Obligations Disclosure
As of September 30, 2018, we had unconditional purchase obligations during the next five fiscal years as follows (in thousands):
2019
 
$
756,800

2020
 
527,100

2021
 
353,700

2022
 
168,300

2023
 
156,300

Total
 
$
1,962,200