Net Income per Share (Tables)

9 Months Ended

Sep. 30, 2025

Net Income per Share [Abstract]

Basic and Diluted Net Income per Share

Basic and diluted net income per share:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Net Income - Omnicom Group Inc.	$	341.3	$	385.9	$	886.6	$	1,032.6
Weighted Average Shares (millions):
Basic	193.8		195.6		195.2		196.5
Dilutive stock options and restricted shares	1.1		2.6		1.2		2.4
Diluted	194.9		198.2		196.4		198.9
Anti-dilutive stock options and restricted shares (millions)	5.8		—		5.8		—
Net Income per Share - Omnicom Group Inc.:
Basic	$1.76		$1.97		$4.54		$5.25
Diluted	$1.75		$1.95		$4.51		$5.19