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Earnings Per Share
 3 Months Ended
Mar. 31, 2021
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
(in millions, except per share amounts)March 31, 2021March 31, 2020
Computation of Basic (Loss) Earnings Per Share
Net (loss) income$(11)$31 
Shares for basic (loss) earnings per share326.7 325.4 
Basic (loss) earnings per share$(0.03)$0.10 
Computation of Diluted (Loss) Earnings Per Share
Net (loss) income$(11)$31 
Shares for basic (loss) earnings per share326.7 325.4 
Effect of dilutive securities
Stock-based compensation (1)
— 2.0 
Shares for diluted (loss) earnings per share326.7 327.4 
Diluted (loss) earnings per share$(0.03)$0.09 
(1) For the calculation of diluted loss per share for the three months ended March 31, 2021, we excluded stock-based compensation securities of 2.3 million because the effect was anti-dilutive.