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Real Estate (Tables)
 6 Months Ended
Mar. 31, 2021
Real Estate [Abstract]  
Schedule of Real Estate Properties
Real estate consists of:
March 31,
2021		September 30,
2020
 (In millions)
Developed and under development projects$1,643.1 $1,304.3 
Undeveloped land55.5 5.4 
$1,698.6 $1,309.7