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Shareholders' Equity (Tables)
6 Months Ended
Jun. 28, 2014
Stockholders' Equity Note [Abstract]  
schedule of weighted average assumptions to measure grant date fair values of performance share awards [Table Text Block]
The assumptions used in the Company's Monte Carlo simulation related to grants for PSUs were as follows:
 
June 28, 2014
 
June 29, 2013
Risk-free interest rate
0.9
%
 
0.3
%
Expected life (years)
3.0

 
3.0

Expected volatility
32.0
%
 
35.0
%
Expected dividend yield
1.1
%
 
1.2
%
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The assumptions used in the Company's Black-Scholes valuation related to grants for options and SARs were as follows:
 
June 28, 2014
 
June 29, 2013
Risk-free interest rate
2.0
%
 
1.1
%
Expected life (years)
7.0

 
7.0

Expected volatility
37.7
%
 
38.5
%
Expected dividend yield
1.2
%
 
1.2
%
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
ollowing is a summary of PSU activity for the six months ended June 28, 2014:
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (Years)
Unvested PSUs at December 28, 2013
35,730

 
$
56.71

 
2.3
Granted
25,310

 
83.74

 
 
Vested

 

 
 
Forfeited
1,645

 
56.71

 
 
Unvested PSUs at June 28, 2014
59,395

 
$
68.23

 
2.5
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Following is a summary of RSU award activity for the six months ended June 28, 2014:
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (Years)
Unvested RSUs at December 28, 2013
210,264

 
65.57

 
1.9
Granted
77,950

 
75.76

 
 
Vested
45,873

 
71.35

 
 
Forfeited
5,035

 
63.05

 
 
Unvested RSUs at June 28, 2014
237,306

 
67.85

 
2.2
Summary of Share-Based Awards
A summary of share-based awards (options and SARs) as of June 28, 2014 follows below. Forfeitures of share-based awards during the six months ended June 28, 2014 were immaterial.
Number of Shares
Shares
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining
Contractual Term
(years)
 
Aggregate Intrinsic
Value (in
millions)
Outstanding
1,508,436

 
$59.21
 
6.3
 
$
28.4

Exercisable
886,254

 
$53.04
 
4.9
 
22.1

Nonvested Restricted Stock Shares Activity [Table Text Block]
Following is a summary of RSA award activity for the six months ended June 28, 2014:
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (Years)
Unvested RSAs at December 28, 2013
40,717

 
$
66.50

 
2.0
Granted
12,144

 
75.76

 
 
Vested
27,170

 
67.90

 
 
Forfeited

 

 
 
Unvested RSAs June 28, 2014
25,691

 
$
69.40

 
0.8