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Share-Based Compensation and Capital Stock (Tables)
 3 Months Ended
Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Pre-Tax Stock-Based Compensation Expenses And Associated Income Tax Benefits
The components of the Company’s pretax share-based compensation expense and associated income tax benefits are as follows for the three months ended March 31, 2019 and 2018:
 
 
Three Months Ended March 31,
(In millions)
 
2019
 
2018
Stock options
 
$
0.6

 
$
0.7

Restricted stock
 
2.0

 
1.7

Performance vested restricted stock units
 
1.1

 
1.1

Total
 
$
3.7

 
$
3.5

Income tax benefits
 
$
0.9

 
$
0.8
Summary Of Change In Stock-Based Award Activity
A summary of stock-based award activity as of March 31, 2019 and changes during the three months ended are presented below:
 
Stock Options
 
Restricted Stock
 
Performance Vested
Restricted Stock Units
 
Options
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
 
Shares
 
Weighted
Average
Grant Date
Fair Value
 
Shares
 
Weighted
Average
Grant Date
Fair Value
Outstanding at January 1, 2019
1,186,180

 
$
54.13

 
 
 
303,765

 
$
65.06

 
336,820

 
$
63.28

Granted
141,827

 
81.15

 
 
 
136,350

 
81.04

 
83,934

 
81.15

Performance-Based Leveraging(1)
—

 
—

 
 
 
—

 
—

 
1,583

 
51.49

Exercised/Vested
(205,030
)
 
44.89

 
 
 
(65,538
)
 
62.67

 
(73,199
)
 
50.67

Expired
—

 
—

 
 
 
—

 
—

 
—

 
—

Forfeited
—

 
—

 
 
 
(6,034
)
 
65.77

 
(2,736
)
 
70.18

Outstanding at March 31, 2019
1,122,977

 
$
59.23

 
3.9 years
 
368,543

 
$
71.38

 
346,402

 
$
70.16

Options exercisable at March 31, 2019
752,844

 
$
53.62

 
3.1 years
 
 
 
 
 
 
 
 
(1) PVRSU units outstanding have been increased by 1,583 units due to the Company exceeding the targeted performance conditions contained in PVRSUs granted in prior periods.
Weighted Average Assumptions Of Black-Scholes Option-Pricing Model
The fair value of the options granted was estimated on the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions:
 
2019 Grants
Risk-free interest rate
2.46
%
Expected volatility
21.49
%
Expected life of stock option
4.4 years

Dividend yield
1.06
%
Requisite service period
4 years

Contractual life
7 years

Weighted average fair value of options granted (per option)
$
15.84