XML 49 R36.htm IDEA: XBRL DOCUMENT v3.19.2
Revenues (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Oct. 01, 2018
Sep. 30, 2018
Revenue from External Customer [Line Items]            
Contract with Customer, Liability $ 9.9   $ 9.9   $ 6.4 $ 0.0
Deferred income 9.4   9.4     $ 11.6
Other 0.6 $ 0.3 1.9 $ 0.8    
Revenue, Net (Deprecated 2018-01-31) 88.2 23.6 192.0 77.0    
Retail Land Sales, Improvement Revenue, Prior Sales (Deprecated 2018-01-31) 1.0   4.8      
Real Estate [Member] | Residential Real Estate [Member]            
Revenue from External Customer [Line Items]            
Residential lot sales 87.6 19.9 171.6 61.3    
Land [Member] | Residential Real Estate [Member]            
Revenue from External Customer [Line Items]            
Residential lot sales 0.0 3.4 0.0 5.7    
Land [Member] | Commercial Real Estate [Member]            
Revenue from External Customer [Line Items]            
Residential lot sales $ 0.0 $ 0.0 $ 18.5 $ 9.2