Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue	$ 15,134.4	$ 15,317.8	$ 14,584.5
Operating Expenses	13,214.3	13,373.7	12,759.2
Operating Income	1,920.1	1,944.1	1,825.3
Interest Expense	181.1	177.2	197.2
Interest Income	39.6	43.1	32.8
Income Before Income Taxes and Income From Equity Method Investments	1,778.6	1,810.0	1,660.9
Income Tax Expense	583.6	593.1	565.2
Income From Equity Method Investments	8.4	16.2	15.9
Net Income	1,203.4	1,233.1	1,111.6
Net Income Attributed To Noncontrolling Interests	109.5	129.1	120.5
Net Income - Omnicom Group Inc.	$ 1,093.9	$ 1,104.0	$ 991.1
Net Income Per Share - Omnicom Group Inc.:
Basic	$ 4.43	$ 4.27	$ 3.73
Diluted	4.41	4.24	3.71
Dividends Declared Per Common Share	$ 2.00	$ 1.90	$ 1.60