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Share-Based Compensation (Tables)
 12 Months Ended
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Recognized Share-Based Compensation Cost Share-based compensation cost recognized in the consolidated income statements is summarized below:
 
2018

2017

2016

Before-Tax Share-Based Compensation Cost – Total

$38.8


$40.7


$37.6

Before-Tax Share-Based Compensation Cost – Discontinued Operations
—

.8

6.6

Before-Tax Share-Based Compensation Cost – Continuing Operations

$38.8


$39.9


$31.0

Income tax benefit – Continuing Operations
(9.1
)
(14.0
)
(10.8
)
After-Tax Share-Based Compensation Cost – Continuing Operations

$29.7


$25.9


$20.2
Schedule of Before-Tax Share-Based Compensation Costs by Type of Program On a total company basis, before-tax share-based compensation cost by type of program was as follows:
 
2018

2017

2016

Deferred stock units

$38.3


$34.5


$29.9

Stock options
.2

1.4

4.2

Restricted stock
.3

4.8

3.5

Before-Tax Share-Based Compensation Cost – Total

$38.8


$40.7


$37.6
Schedule of Assumptions for Fair Value of Market-Based Deferred Stock Units The calculation of the fair value used the following assumptions:
 
 
2018
 
2017
2016
Expected volatility
 
18.7
%
 
20.6
%
20.5
%
Risk-free interest rate
 
1.9
%
 
1.4
%
1.2
%
Expected dividend yield
 
2.6
%
 
2.5
%
2.2
%
Schedule of Deferred Stock Units and Restricted Stock Activity
Deferred Stock Units
 
Shares (000)

 
Weighted Average
Grant-Date Fair Value

Outstanding at 30 September 2017
 
975

 

$127.29

Granted
 
249

 
179.21

Paid out
 
(237
)
 
134.99

Forfeited/adjustments
 
(47
)
 
153.57

Outstanding at 30 September 2018
 
940

 

$137.78


A summary of restricted stock activity is presented below:
Restricted Stock
 
Shares (000)

 
Weighted Average
Grant-Date Fair Value

Outstanding at 30 September 2017
 
56

 

$135.74

Vested
 
(14
)
 
121.90

Outstanding at 30 September 2018
 
42

 

$140.28
Schedule of Stock Option Activity A summary of stock option activity is presented below:
Stock Options
 
Shares (000)

 
Weighted Average
Exercise Price

Outstanding at 30 September 2017
 
3,202

 

$84.85

Exercised
 
(1,015
)
 
75.15

Forfeited
 
(1
)
 
124.76

Outstanding and Exercisable at 30 September 2018
 
2,186

 

$89.33

Stock Options
 
Weighted Average Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value

Outstanding and Exercisable at 30 September 2018
 
3.9
 

$170