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Shareholders' Equity (Tables)
12 Months Ended
Jan. 02, 2016
Stockholders' Equity Note [Abstract]  
Assumptions used in Black-Scholes Valuation for Options and SAR's
The assumptions used in the Company's Black-Scholes valuation related to grants for options and SARs were as follows:
 
2015
 
2014
 
2013
Per share weighted average fair value of grants
$
27.15

 
$
28.01

 
$
23.01

Risk-free interest rate
1.9
%
 
2.0
%
 
1.1
%
Expected life (years)
7.0

 
7.0

 
7.0

Expected volatility
35.6
%
 
37.7
%
 
38.5
%
Expected dividend yield
1.2
%
 
1.2
%
 
1.2
%
Share-based Incentive Plan Grant Activity (Options and SAR's)
Following is a summary of share-based incentive plan grant activity (options and SARs) for fiscal 2015.
Number of Shares Under Options and SARs
Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (years)
 
Aggregate Intrinsic Value (in millions)
Exercisable at January 3, 2015
1,488,832

 
$
59.34

 
 
 
 
Granted
206,500

 
78.15

 
 
 
 
Exercised
(129,366
)
 
43.32

 
 
 
 
Forfeited
(14,925
)
 
66.61

 
 
 
 
Expired
(2,775
)
 
71.30

 
 
 
 
Outstanding at January 2, 2016
1,548,266

 
$
63.09

 
5.7
 
$
5.7

Exercisable at January 2, 2016
953,347

 
$
57.22

 
4.3
 
5.7

RSA Award Activity
Following is a summary of RSA award activity for fiscal 2015:
 
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (years)
Unvested RSAs at January 3, 2015
 
24,814

 
$
69.53

 
0.3
Granted
 
14,400

 
78.15

 
 
Vested
 
(24,814
)
 
69.53

 
 
Forfeited
 

 

 
 
Unvested RSAs January 2, 2016
 
14,400

 
$
78.15

 
0.4
RSU Award Activity
Following is a summary of RSU award activity for fiscal 2015:
 
 
 
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (years)
Unvested RSUs at January 3, 2015
 
237,946

 
$
68.28

 
1.8
Granted
 
106,600

 
77.38

 
 
Vested
 
(67,701
)
 
63.86

 
 
Forfeited
 
(8,190
)
 
71.01

 
 
Unvested RSUs at January 2, 2016
 
268,655

 
$
72.91

 
1.8
PSU Award Activity
Following is a summary of PSU award activity for fiscal 2015:
 
 
 
 
Shares
 
Weighted Average Fair Value at Grant Date
 
Weighted Average Remaining Contractual Term (years)
Unvested PSUs at January 3, 2015
 
59,115

 
$
68.25

 
2.0
Granted
 
30,845

 
89.98

 
 
Vested
 

 

 
 
Forfeited
 
(2,065
)
 
70.97

 
 
Unvested PSUs January 2, 2016
 
87,895

 
$
75.81

 
1.9