Net Income per Share (Tables)

3 Months Ended

Mar. 31, 2025

Net Income per Share [Abstract]

Basic and Diluted Net Income per Share

Basic and diluted net income per share:

	Three Months Ended March 31,
	2025		2024
Net Income - Omnicom Group Inc.	$	287.7	$	318.6
Weighted Average Shares (millions):
Basic	196.7		197.9
Dilutive stock options and restricted shares	1.6		2.2
Diluted	198.3		200.1
Anti-dilutive stock options and restricted shares (millions)	1.1		—
Net Income per Share - Omnicom Group Inc.:
Basic	$1.46		$1.61
Diluted	$1.45		$1.59