Earnings Per Share (Notes)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

Earnings Per Share

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

	Three Months Ended March 31,
	2021		2020
Net income available to IPG common stockholders	$	91.7	$	4.7
Weighted-average number of common shares outstanding - basic	391.5		387.7
Dilutive effect of stock options and restricted shares	4.5		4.0
Weighted-average number of common shares outstanding - diluted	396.0		391.7
Earnings per share available to IPG common stockholders:
Basic	$	0.23	$	0.01
Diluted	$	0.23	$	0.01