Investments in Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Investments in equity method affiliates	$ 10.2	$ 8.8
Undistributed earnings of equity method affiliates	6.5	5.4
Proceeds from Equity Method Investment, Distribution	$ 0.7	1.0	$ 1.5
Slifer, Smith, and Frampton/Vail Associates Real Estate, LLC ("SSF/VARE") [Member]
Ownership interest	50.00%
Keystone and Intrawest Llc [Member]
Ownership interest	50.00%
Clinton Ditch and Reservoir Company [Member]
Ownership interest	43.00%
Slifer Smith and Frampton and Vail Associates Real Estate Llc Ssf and Vare [Member]
Real estate revenue from leases		$ 0.0	$ 0.0

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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