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Earnings Per Share Earnings Per Share (Tables)
 12 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Summary of Basic and Diluted EPS
 
 
Fiscal
 
 
2017
 
2016
 
2015
Net loss from continuing operations attributable to controlling interest
 
$
(20.6
)
 
$
(1.6
)
 
$
(242.1
)
Net income (loss) from discontinued operations attributable to controlling interest
 
126.6

 
(197.2
)
 
(314.7
)
Net income (loss) attributable to controlling interest
 
$
106.0

 
$
(198.8
)
 
$
(556.8
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding - basic and diluted
 
199,990

 
198,374

 
198,142

 
 
 
 
 
 
 
Net income (loss) per common share attributable to controlling interest:
 
 
 
 
 
 
Basic loss from continuing operations
 
$
(0.10
)
 
$
(0.01
)
 
$
(1.22
)
Basic income (loss) from discontinued operations
 
0.63

 
(0.99
)
 
(1.59
)
Basic
 
$
0.53

 
$
(1.00
)
 
$
(2.81
)
 
 
 
 
 
 
 
Diluted loss from continuing operations
 
$
(0.10
)
 
$
(0.01
)
 
$
(1.22
)
Diluted income (loss) from discontinued operations
 
0.63

 
(0.99
)
 
(1.59
)
Diluted
 
$
0.53

 
$
(1.00
)
 
$
(2.81
)