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Earnings Per Common Share ("EPS") (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Net Income $ 300 $ 399
Weighted-average common shares outstanding (for basic calculation) 281.0 289.0
Effect of dilutive share-based employee compensation 4.0 5.0
Weighted-average common and dilutive potential common shares outstanding (for diluted calculation) 285.0 294.0
Basic EPS $ 1.07 $ 1.38
Diluted EPS $ 1.05 $ 1.36
Unexercised employee stock options and stock appreciation rights (in millions) excluded from the diluted EPS computation [1] 1.5 1.2
[1] These unexercised employee stock options and stock appreciation rights were not included in the computation of diluted EPS because to do so would have been antidilutive for the periods presented.