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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Reconciliation of the Earnings (Losses) and Number of Shares Used in Calculations of Basic and Diluted Earnings Per Share
The table below illustrates the reconciliation of the earnings and number of shares used in our calculations of basic and diluted earnings per share, the latter of which uses the treasury stock method in order to calculate the dilutive effect of the Company’s potential common stock:
(in millions, except per share amounts)202120202019
Computation of Basic Earnings Per Share
Net income (loss)$1,099 $(267)$1,273 
Shares for basic earnings per share327.2 325.8 332.7 
Basic earnings (loss) per share$3.36 $(0.82)$3.83 
Computation of Diluted Earnings Per Share
Net income (loss)$1,099 $(267)$1,273 
Shares for basic earnings per share327.2 325.8 332.7 
Effect of dilutive securities
Stock-based compensation(1)
2.1 — 2.8 
Shares for diluted earnings per share329.3 325.8 335.5 
Diluted earnings (loss) per share$3.34 $(0.82)$3.80 
(1) For the calculation of diluted loss per share for 2020, we excluded share-based compensation securities of 1.4 million because the effect was anti-dilutive.