Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net Income	$ 236.3	$ 229.8
Unamortized loss on cash flow hedge, net of income taxes of ($20.3) and ($1.7) for the three months ended March 31, 2016 and 2015, respectively	(28.5)	(2.5)
Unrealized gain on available-for-sale securities, net of income taxes of $0.1 for the three months ended March 31, 2015	0.0	0.2
Foreign currency translation adjustment, net of income taxes of $58.2 and ($175.8) for the three months ended March 31, 2016 and 2015, respectively	113.1	(341.3)
Defined benefit pension and postemployment plans adjustment, net of income taxes of $1.0 and $1.5 for the three months ended March 31, 2016 and 2015, respectively	2.3	2.2
Other Comprehensive Income (Loss)	86.9	(341.4)
Comprehensive Income (Loss)	323.2	(111.6)
Comprehensive Income (Loss) Attributed to Noncontrolling Interests	38.7	(2.2)
Comprehensive Income (Loss) - Omnicom Group Inc.	$ 284.5	$ (109.4)