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Real Estate (Tables)
 3 Months Ended
Dec. 31, 2019
Real Estate [Abstract]  
Real Estate
Real estate consists of:
 
December 31,
2019
 
September 30,
2019
 
(In millions)
Developed and under development projects
$
1,051.4

 
$
1,011.8

Undeveloped land
15.4

 
17.1

 
$
1,066.8

 
$
1,028.9