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Revenue (Notes)
 6 Months Ended
Mar. 31, 2024
Revenues [Abstract]  
Revenue from Contract with Customer [Text Block] Revenues
Revenues consist of:
Three Months Ended March 31,Six Months Ended March 31,
 2024202320242023
 (In millions)
Residential lot sales$325.9 $252.9 $630.1 $459.5 
Deferred development lot sales1.7 7.5 3.0 14.3 
Tract sales and other6.2 41.1 6.6 44.4 
$333.8 $301.5 $639.7 $518.2 

In the three and six months ended March 31, 2024, the Company recognized $1.7 million and $3.0 million of revenues as a result of its progress towards completion of its remaining unsatisfied performance obligations on deferred development projects, compared to $7.5 million and $14.3 million in the prior year periods.