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Shareholders’ Equity (Tables)
 3 Months Ended
Mar. 31, 2017
Equity [Abstract]  
Schedule of Current Stock Repurchase Program

The transactions effectuated to date occurred in open market purchases.

 

Period     (a)
Total Number of Shares Purchased		     (b)
Average Price
Paid per Share		     (c)
Total Number of
Shares Purchased
as Part of Publicly
Announced Plans
or Programs		     (d)
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs (in $ millions)		  
January 2017       35,794     $ 12.29       35,794     $ 3.5  
February 2017       22,012       11.57       22,012       3.2  
March 2017       21,150       11.03       21,150       9.9  
Total       78,956       11.75       78,956          
Summary of Change in Shareholders' Equity

The following table summarizes the change in shareholders’ equity during the three months ended March 31, 2017 and 2016, respectively:

 

    Three months ended March 31,  
    2017     2016  
Balance at the beginning of the period   $ 77,449     $ 82,569  
Exercise of stock options     9       293  
Stock repurchased     (928 )     (404 )
Options repurchased     —       (1,752 )
Proceeds from stock purchase plan     19       25  
Dividends     (439 )     (459 )
Share-based compensation     171       148  
Tax benefit - stock option exercise     —       563  
Unrealized gain or loss on investments, net of tax     38       121  
Foreign currency translation adjustment     12       33  
Net income/(loss) during the period     (468 )     1,368  
Balance at end of the period   $ 75,863     $ 82,505