Noncontrolling Interests (Tables)

12 Months Ended

Dec. 31, 2019

Noncontrolling Interests [Abstract]

Changes in Ownership Interests in Less than 100% Owned Subsidiaries

Changes in the ownership interests in our less than 100% owned subsidiaries were (in millions):

	Year Ended December 31,
	2019		2018		2017
Net income attributed to Omnicom Group Inc.	$	1,339.1	$	1,326.4	$	1,088.4
Transfers (to) from noncontrolling interests:
Increase in additional paid-in capital from sale of shares in noncontrolling interests	—		4.4		1.8
Decrease in additional paid-in capital from purchase of shares in noncontrolling interests	(22.3)		(44.1)		(27.5)
Net transfers (to) from noncontrolling interests	(22.3)		(39.7)		(25.7)
Change from net income attributed to Omnicom Group Inc. and        transfers (to) from noncontrolling interests	$	1,316.8	$	1,286.7	$	1,062.7