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Accounting for Share-Based Payments (Tables)
 12 Months Ended
Jan. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Option Pricing Assumptions The weighted average assumptions used in the Black-Scholes option-pricing model and weighted-average grant date fair value for options granted in 2019, 2018, and 2017 are as follows:
 
2019
 
2018
 
2017
Weighted-average assumptions used:
 
 
 
 
 
Expected volatility
23.0
%
 
23.3
%
 
23.6
%
Dividend yield
1.73
%
 
1.71
%
 
1.68
%
Risk-free interest rate
2.28
%
 
2.71
%
 
2.14
%
Expected term, in years
6.38

 
6.58

 
6.43

 
 
 
 
 
 
Weighted-average grant date fair value
$
23.66

 
$
21.12

 
$
18.30
Schedule of Stock Option Activity
Transactions related to stock options for the fiscal year ended January 31, 2020 are summarized as follows:
 
Shares
(In thousands)
 
Weighted-Average Exercise Price Per Share
 
Weighted-Average Remaining Term (In years)
 
Aggregate Intrinsic Value (In thousands)
Outstanding at February 1, 2019
2,691

 
$
70.87

 
 
 
 
Granted
683

 
108.95

 
 
 
 
Canceled, forfeited or expired
(189
)
 
95.79

 
 
 
 
Exercised
(842
)
 
54.04

 
 
 
 
Outstanding at January 31, 2020
2,343

 
$
86.01

 
7.42
 
$
70,977

Vested and expected to vest at January 31, 20201
2,263

 
$
85.29

 
7.36
 
$
70,136

Exercisable at January 31, 2020
1,287

 
$
72.86

 
6.28
 
$
55,834

1 
Includes outstanding vested options as well as outstanding nonvested options after a forfeiture rate is applied.
Schedule of Restricted Stock Awards Activity
Transactions related to restricted stock awards for the fiscal year ended January 31, 2020 are summarized as follows:
 
Shares
(In thousands)
 
Weighted-Average Grant-Date Fair Value Per Share
Nonvested at February 1, 2019
1,790

 
$
81.16

Granted
1,136

 
109.04

Vested
(570
)
 
72.26

Canceled or forfeited
(359
)
 
90.86

Nonvested at January 31, 2020
1,997

 
$
97.81
Schedule of Performance Share Units Pricing Assumptions The weighted-average assumptions used in the Monte Carlo simulations for these awards granted in 2019 and 2018 are as follows:
 
2019
 
2018
Weighted-average assumptions used:
 
 
 
Expected volatility
24.1
%
 
22.8
%
Dividend yield
1.89
%
 
1.77
%
Risk-free interest rate
2.28
%
 
2.36
%
Expected term, in years
2.84

 
2.81
Schedule of Performance Share Units Activity
Transactions related to performance share units classified as equity awards for the fiscal year ended January 31, 2020 are summarized as follows:
 
Units
(In thousands)1
 
Weighted-Average Grant-Date Fair Value Per Unit
Nonvested at February 1, 2019
613

 
$
83.83

Granted
249

 
115.93

Vested
(171
)
 
77.75

Canceled or forfeited
(122
)
 
92.50

Nonvested at January 31, 2020
569

 
$
97.86


¹
The number of units presented is based on achieving the targeted performance goals as defined in the performance share unit agreements. As of January 31, 2020, the maximum number of nonvested units that could vest under the provisions of the agreements was 0.7 million for the RONCAA awards and 0.4 million for the ROIC awards.
Schedule of Restricted Stock Unit Activity
Transactions related to restricted stock units for the fiscal year ended January 31, 2020 are summarized as follows:

Shares
(In thousands)
 
Weighted-Average Grant-Date Fair Value Per Share
Nonvested at February 1, 2019
329

 
$
74.95

Granted
452

 
103.40

Vested
(82
)
 
67.62

Canceled or forfeited
(193
)
 
88.57

Nonvested at January 31, 2020
506

 
$
96.39