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Earnings Per Share
 9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share ("EPS")
There are no adjustments required to be made to net income for purposes of computing EPS. The average number of common shares outstanding is reconciled to those used in the basic and diluted EPS computations as follows:
Three Months Ended
September 30		Nine Months Ended
September 30
(Millions of shares)2020201920202019
Basic341.0 343.8 341.1 344.1 
Dilutive effect of stock options and restricted share unit awards1.3 2.1 1.2 1.9 
Diluted342.3 345.9 342.3 346.0 
The impact of options outstanding that were not included in the computation of diluted EPS because their exercise price was greater than the average market price of the common shares was insignificant. The number of common shares outstanding as of September 30, 2020 and 2019 was 340.4 million and 343.1 million, respectively.