Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

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

	Three months ended September 30,				Nine months ended September 30,
	2025		2024		2025		2024
Net income available to IPG common stockholders	$	124.2	$	20.1	$	201.3	$	345.0
Weighted-average number of common shares outstanding - basic	365.0		373.9		368.4		376.2
Dilutive effect of stock options and restricted shares	3.0		2.9		2.5		2.5
Weighted-average number of common shares outstanding - diluted	368.0		376.8		370.9		378.7
Earnings per share available to IPG common stockholders:
Basic	$	0.34	$	0.05	$	0.55	$	0.92
Diluted	$	0.34	$	0.05	$	0.54	$	0.91