v3.10.0.1
Share-Based Compensation, Stock Options and Restricted Stock Units (Tables)
12 Months Ended
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of recognized share-based compensation expense
The tables below provide information on our share-based compensation.
Recognized Share-Based Compensation Expense


 


 


Year ended December 31 (in millions)
2018

 
2017

 
2016

Restricted share units
$
402

 
$
349

 
$
306

Stock options
205

 
205

 
173

Employee stock purchase plans
32

 
32

 
28

Total
$
639

 
$
586

 
$
507

Schedule of stock option and restricted share units activity
Stock Options and Restricted Share Units
 
 
 
As of December 31, 2018, unless otherwise stated (in millions, except per share data)
Stock
Options

 
RSUs

Awards granted during 2018
41

 
24

Weighted-average exercise price of awards granted during 2018
$
35.81

 
 
Stock options outstanding and nonvested RSUs
200

 
51

Weighted-average exercise price of stock options outstanding
$
27.69

 
 
Weighted-average fair value at grant date of nonvested RSUs
 
 
$
33.77

Schedule of stock option and restricted share units fair value and significant assumptions
The table below presents the weighted-average fair value on the date of grant of RSUs and stock options awarded under our various plans and the related weighted-average valuation assumptions.
Year ended December 31
2018

 
2017

 
2016

RSUs fair value
$
35.56

 
$
37.77

 
$
30.02

Stock options fair value
$
7.14

 
$
7.01

 
$
5.78

Stock Option Valuation Assumptions:
 
 
 
 
 
Dividend yield
2.1
%
 
1.7
%
 
1.8
%
Expected volatility
22.0
%
 
20.1
%
 
23.0
%
Risk-free interest rate
2.7
%
 
2.2
%
 
1.5
%
Expected option life (in years)
6.0

 
6.1

 
6.1