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Stock-Based Compensation
3 Months Ended
Mar. 21, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation
Stock-Based Compensation
The following table summarizes our total stock-based compensation expense:
 
 
12 Weeks Ended
 
 
3/21/2015

 
3/22/2014

Stock-based compensation expense
 
$
76

 
$
72

Restructuring and impairment benefits
 

 
(3
)
Total
 
$
76

 
$
69


Our weighted-average Black-Scholes fair value assumptions are as follows: 
 
12 Weeks Ended
 
3/21/2015

 
3/22/2014

Expected life
7 years

 
6 years

Risk free interest rate
1.8
%
 
1.8
%
Expected volatility (a)
15
%
 
16
%
Expected dividend yield
2.7
%
 
2.9
%
(a)
Reflects movements in our stock price over the most recent historical period equivalent to the expected life.
The following table summarizes awards granted under the terms of our 2007 Long-Term Incentive Plan:
 
 
12 Weeks Ended
 
 
3/21/2015
 
3/22/2014
 
 
Granted (a)
 
Weighted-Average Grant Price
 
Granted (a)
 
Weighted-Average Grant Price
Stock options
 
1.6

 
$
99.25

 
3.0

 
$
79.75

Restricted stock units (RSUs) and Performance stock units (PSUs)
 
2.6

 
$
99.25

 
4.2

 
$
79.76

PepsiCo equity performance units (PEPunits)
 
0.3

 
$
99.25

 
0.4

 
$
79.75

(a)
In millions.