Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Jul. 31, 2020	Jul. 31, 2019
Significant Observable Inputs (Level 2) \| Fair Value \| Long-term Debt
Debt Instrument
Long-term debt, fair value	$ 297.3	$ 281.5
Significant Observable Inputs (Level 2) \| Fair Value \| Long-Term Debt, Variable Interest Rate
Debt Instrument
Long-term debt, fair value	344.3	310.9
Significant Observable Inputs (Level 2) \| Carrying Value \| Long-term Debt
Debt Instrument
Long-term debt, fair value	275.0	275.0
Significant Observable Inputs (Level 2) \| Carrying Value \| Long-Term Debt, Variable Interest Rate
Debt Instrument
Long-term debt, fair value	344.3	310.9
Significant Unobservable Inputs (Level 3) \| Carrying Value
Debt Instrument
Carrying value of equity method investments	$ 21.7	$ 23.0

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

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Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117311354&loc=d3e32014-111567

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