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EARNINGS PER SHARE - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Basic:                
Net income $ 340.1 $ 489.5 $ 338.2 $ 325.2 $ (121.9) $ 310.6 $ 1,167.8 $ 513.9
Weighted-average shares outstanding (in shares) 623.6     622.1     623.0 622.3
Basic earnings per share (in dollars per share) $ 0.55     $ 0.52     $ 1.87 $ 0.83
Diluted:                
Net income $ 340.1 $ 489.5 $ 338.2 $ 325.2 $ (121.9) $ 310.6 $ 1,167.8 $ 513.9
Weighted-average shares outstanding (in shares) 623.6     622.1     623.0 622.3
Dilutive effect of stock plans (in shares) 8.1     8.9     8.0 6.5
Dilutive weighted-average shares outstanding (in shares) 631.7     631.0     631.0 628.8
Diluted earnings per share (in dollars per share) $ 0.54     $ 0.52     $ 1.85 $ 0.82