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Common Share Repurchases
9 Months Ended
Sep. 30, 2020
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]  
Common Share Repurchases COMMON SHARE REPURCHASES
 
During the three months ended September 30, 2020, the Company did not repurchase any common shares under its share repurchase authorization. For the nine months ended September 30, 2020, the Company repurchased 3.5 million shares under its share repurchase authorization, for a total cost of $425 million, all of which were repurchased during the three months ended March 31, 2020.  The average cost per share repurchased was $123.09.  In addition, the Company acquired 1,368 shares and 0.3 million shares for a total cost of approximately $159,000 and $46 million during the three months and nine months ended September 30, 2020, respectively, that were not part of the publicly announced share repurchase authorization.  These shares consisted of shares retained to cover payroll withholding taxes in connection with the vesting of restricted stock unit awards and performance share awards, and shares used by employees to cover the price of certain stock options that were exercised. At September 30, 2020, the Company had $1.36 billion of capacity remaining under its share repurchase authorization.