Earnings Per Share Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders

The following sets forth basic and diluted earnings per common share available to IPG common stockholders.

	Years ended December 31,
	2019		2018		2017
Net income available to IPG common stockholders	$	656.0	$	618.9	$	554.4
Weighted-average number of common shares outstanding - basic	386.1		383.3		389.6
Dilutive effect of stock options and restricted shares	5.1		5.7		7.7
Weighted-average number of common shares outstanding - diluted	391.2		389.0		397.3
Earnings per share available to IPG common stockholders:
Basic	$	1.70	$	1.61	$	1.42
Diluted	$	1.68	$	1.59	$	1.40