Net Income per Share (Tables)

12 Months Ended

Dec. 31, 2019

Net Income per Share [Abstract]

Computations of Basic and Diluted Net Income per Share

The computations of basic and diluted net income per share were (in millions, except per share amounts):

	Year Ended December 31,
	2019		2018		2017
Net income available for common shares:
Net income - Omnicom Group Inc.	$	1,339.1	$	1,326.4	$	1,088.4
Net income allocated to participating securities	—		(0.1)		(1.6)
	$	1,339.1	$	1,326.3	$	1,086.8
Weighted average shares
Basic	219.8		226.6		232.3
Dilutive stock options and restricted shares	1.1		1.0		1.6
Diluted	220.9		227.6		233.9
Anti-dilutive stock options and restricted shares	—		1.0		1.0
Net Income per Share - Omnicom Group Inc.:
Basic	$	6.09	$	5.85	$	4.68
Diluted	$	6.06	$	5.83	$	4.65