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Earnings Per Share
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE
The table below presents the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share:
Three Months Ended Nine Months Ended
(in millions, except per share amounts)September 30, 2020September 30, 2019September 30, 2020September 30, 2019
Computation of Basic Earnings Per Share
Net income (loss)$100 $387 $(103)$994 
Shares for basic earnings (loss) per share325.9 329.9 325.7 334.4 
Basic earnings (loss) per share$0.31 $1.17 $(0.32)$2.97 
Computation of Diluted Earnings (Loss) Per Share
Net income (loss)$100 $387 $(103)$994 
Shares for basic earnings (loss) per share325.9 329.9 325.7 334.4 
Effect of dilutive securities
Share-based compensation (1)
0.9 2.6 — 2.8 
Shares for diluted earnings (loss) per share326.8 332.5 325.7 337.2 
Diluted earnings (loss) per share$0.31 $1.16 $(0.32)$2.95 
(1) For the calculation of diluted loss per share for the nine months ended September 30, 2020, we excluded share-based compensation securities of 1.2 million because the effect was anti-dilutive.