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Shareholders' Equity (Tables)
9 Months Ended
Sep. 27, 2014
Stockholders' Equity Note [Abstract]  
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:
 
September 27, 2014
 
September 28, 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
%
Summary of Share-Based Awards
A summary of share-based awards (options and SARs) as of September 27, 2014 follows below. Forfeitures of share-based awards during the nine months ended September 27, 2014 were immaterial.
Number of Shares
Shares
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining
Contractual Term
(years)
 
Aggregate Intrinsic
Value (in
millions)
Outstanding
1,498,486

 
$59.27
 
6.1
 
$
13.2

Exercisable
878,054

 
$53.10
 
4.7
 
12.3

Nonvested Restricted Stock Shares Activity [Table Text Block]
Following is a summary of RSA award activity for the nine months ended September 27, 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

 
0.8
Granted
12,144

 
75.76

 
 
Vested
28,047

 
67.83

 
 
Forfeited

 

 
 
Unvested RSAs September 27, 2014
24,814

 
$
69.53

 
0.6
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Following is a summary of RSU award activity for the nine months ended September 27, 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
83,850

 
75.41

 
 
Vested
47,048

 
70.89

 
 
Forfeited
5,885

 
63.51

 
 
Unvested RSUs at September 27, 2014
241,181

 
68.00

 
2.0
Schedule of Weighted Average Assumptions to Measure Grant Date Fair Values of Performance Share Awards
The assumptions used in the Company's Monte Carlo simulation related to grants for PSUs were as follows:
 
September 27,
2014
 
September 28,
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 Nonvested Performance-based Units Activity [Table Text Block]
ollowing is a summary of PSU activity for the nine months ended September 27, 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

 
2.4
Granted
25,310

 
83.74

 
 
Vested

 

 
 
Forfeited
1,645

 
56.71

 
 
Unvested PSUs at September 27, 2014
59,395

 
$
68.23

 
2.2