Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Denominator For Basic And Diluted Earnings Per Share

The denominator for basic and diluted earnings per share at December 31, 2020, 2019 and 2018 is as follows:

	2020	2019	2018
Denominator for basic earnings per share—weighted-average shares	250.8	255.5	258.1
Effect of dilutive securities—employee stock options, non-vested restricted stock awards, convertible debentures and equity units	3.5	4.8	6.1
Denominator for diluted earnings per share	254.3	260.3	264.2