Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Summarized financial information concerning our reportable segments is shown in the following table.

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Revenue:
IAN	$	1,435.7		$	1,423.3		$	2,676.8		$	2,667.2
CMG	320.5			292.4			622.4			555.3
Total	$	1,756.2		$	1,715.7		$	3,299.2		$	3,222.5
Segment operating income:
IAN	$	169.2		$	177.3		$	146.6		$	162.0
CMG	34.6			31.2			48.6			38.7
Corporate and other	(29.0		)	(32.1		)	(62.8		)	(63.7		)
Total	174.8			176.4			132.4			137.0
Interest expense	(37.5		)	(32.7		)	(74.3		)	(65.3		)
Interest income	5.8			6.7			12.2			14.7
Other income, net	4.8			4.7			6.6			3.4
Income before income taxes	$	147.9		$	155.1		$	76.9		$	89.8
Depreciation and amortization of fixed assets and intangible assets:
IAN	$	31.6		$	29.9		$	62.5		$	58.3
CMG	3.9			3.3			7.7			6.7
Corporate and other	3.7			3.6			7.2			6.4
Total	$	39.2		$	36.8		$	77.4		$	71.4
Capital expenditures:
IAN	$	13.5		$	19.9		$	23.5		$	32.7
CMG	3.1			3.6			4.1			5.6
Corporate and other	12.4			12.3			19.2			19.9
Total	$	29.0		$	35.8		$	46.8		$	58.2
	June 30, 2013			December 31, 2012
Total assets:
IAN	$	10,602.4		$	11,035.3
CMG	1,143.3			1,073.1
Corporate and other	591.0			1,385.5
Total	$	12,336.7		$	13,493.9