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STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Jul. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Table Of Weighted Average Black Scholes Fair Value Assumptions [Table Text Block]
The following summarizes the assumptions used to estimate the fair value of service-based stock options granted during the twenty-six weeks ended July 30, 2017 and July 31, 2016:
 
Twenty-Six Weeks Ended
 
7/30/17
 
7/31/16
Weighted average risk-free interest rate
2.10
%
 
1.45
%
Weighted average expected option term (in years)    
6.25

 
6.25

Weighted average Company volatility
29.46
%
 
34.64
%
Expected annual dividends per share    
$
0.15

 
$
0.15

Weighted average grant date fair value per option
$
33.50

 
$
35.60


The risk-free interest rate is based on United States Treasury yields in effect at the date of grant for periods corresponding to the expected option term. The expected option term represents the weighted average period of time that options granted are expected to be outstanding, based on vesting schedules and the contractual term of the options. Company volatility is based on the historical volatility of the Company’s common stock over a period of time corresponding to the expected option term. Expected dividends are based on the Company’s common stock cash dividend rate at the date of grant.

The Company has continued to utilize the simplified method to estimate the expected term for its “plain vanilla” stock options granted due to a lack of relevant historical data resulting, in part, from changes in the pool of employees receiving option grants. The Company will continue to evaluate the appropriateness of utilizing such method.
Share-based Compensation, Stock Options, Activity [Table Text Block]
Service-based stock option activity for the twenty-six weeks ended July 30, 2017 was as follows:
(In thousands, except per option data)
Options
 
Weighted Average Exercise Price
Per Option
Outstanding at January 29, 2017
1,466

 
$
75.74

  Granted
142

 
101.94

  Exercised
105

 
66.49

  Cancelled
10

 
108.23

Outstanding at July 30, 2017
1,493

 
$
78.67

Exercisable at July 30, 2017
1,062

 
$
68.51
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
RSU activity for the twenty-six weeks ended July 30, 2017 was as follows:
(In thousands, except per RSU data)
RSUs
 
Weighted Average Grant Date Fair Value Per RSU
Non-vested at January 29, 2017
812

 
$
105.96

  Granted
441

 
103.04

  Vested
247

 
108.98

  Cancelled
38

 
105.19

Non-vested at July 30, 2017
968

 
$
103.89
Table of Weighted Average Monte Carlo Fair Value Assumptions Performance Awards [Table Text Block]
The fair value of the awards granted in the first quarters of 2017 and 2016 was established for each grant on the grant date using the Monte Carlo simulation model, which was based on the following assumptions:

 
2017
 
2016
Risk-free interest rate
1.49
%
 
1.04
%
Expected Company volatility
31.29
%
 
28.33
%
Expected annual dividends per share
$
0.15

 
$
0.15

Weighted average grant date fair value per PSU
$
96.81

 
$
87.16



Certain of the awards granted in the first quarters of 2017 and 2016 are subject to a holding period of one year after the vesting date. For such awards, the grant date fair value was discounted 12.67% and 12.99%, respectively, for the restriction of liquidity.
Schedule of Nonvested Performance-based Units Activity [Table Text Block]

PSU activity for the twenty-six weeks ended July 30, 2017 was as follows:
(In thousands, except per PSU data)
PSUs
 
Weighted Average Grant Date Fair Value Per PSU
Non-vested at January 29, 2017
125

 
$
92.32

  Granted
72

 
96.81

  Vested
—

 
—

  Cancelled
—

 
—

Non-vested at July 30, 2017
197

 
$
93.97