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Real Estate (Tables)
 9 Months Ended
Jun. 30, 2020
Real Estate [Abstract]  
Schedule of Real Estate Properties
Real estate consists of:
June 30,
2020		September 30,
2019
 (In millions)
Developed and under development projects$1,271.7  $1,011.8  
Undeveloped land15.4  17.1  
$1,287.1  $1,028.9