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

12 Months Ended

Dec. 31, 2023

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,
	2023		2022		2021
Net income available to IPG common stockholders	$	1,098.4	$	938.0	$	952.8
Weighted-average number of common shares outstanding - basic	384.1		391.5		393.0
Dilutive effect of stock options and restricted shares	1.8		3.6		5.4
Weighted-average number of common shares outstanding - diluted	385.9		395.1		398.4
Earnings per share available to IPG common stockholders:
Basic	$	2.86	$	2.40	$	2.42
Diluted	$	2.85	$	2.37	$	2.39