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Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jan. 31, 2022
Accounting Policies [Abstract] |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
| January 31, 2022
| Carrying Value |  | Estimated Fair Value
6.25% Notes | $ | 600,000 |  |  | $ | 623,124 |
0.0% Convertible Notes | $ | 487,824 |  |  | $ | 576,466 |
EPR Secured Notes | $ | 134,909 |  |  | $ | 203,120 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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