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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Shares Used in the Earnings Per Share Calculations The number of shares used in the earnings per share calculations are reconciled as follows:
For the three months ended March 31
(in millions)20222021
Weighted-average basic shares outstanding929.7 666.5 
Dilutive effect of stock options3.0 3.1 
Weighted-average diluted shares outstanding932.7 669.6