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EARNINGS PER SHARE
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE
The numerator for both basic and diluted earnings per share (EPS) is net income attributable to Baxter stockholders. The denominator for basic EPS is the weighted-average number of shares outstanding during the period. The dilutive effect of outstanding stock options, RSUs and PSUs is reflected in the denominator for diluted EPS using the treasury stock method.
The following table is a reconciliation of basic shares to diluted shares.
years ended December 31(in millions)202120202019
Basic shares502 509 509 
Effect of dilutive securities6 8 10 
Diluted shares508 517 519 
The effect of dilutive securities included unexercised stock options, unvested RSUs and contingently issuable shares related to granted PSUs. The computation of diluted EPS excluded 7 million, 4 million, and 4 million equity awards in 2021, 2020, and 2019, respectively, because their inclusion would have had an anti-dilutive effect on diluted EPS. Refer to Note 8 for additional information regarding items impacting basic shares.