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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule Of Stock-Based Compensation Expense
Duke Energy recorded pretax stock-based compensation expense as follows.
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in millions)
2014

 
2013

 
2014

 
2013

Stock options
—

 
$
—

 
—

 
$
2

Restricted stock unit awards
8

 
10

 
30

 
36

Performance awards
4

 
7

 
14

 
25

Total
$
12

 
$
17

 
$
44

 
$
63

Tax benefit associated with stock-based compensation expense
$
5

 
$
6

 
17

 
$
24

Stock-based compensation costs capitalized
1

 
1

 
3

 
3