Segment Information (Tables)

9 Months Ended

Sep. 30, 2011

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 September 30,						Nine months ended September 30,
	2011			2010			2011			2010
Revenue:
IAN	$	1,432.7		$	1,284.7		$	4,140.3		$	3,757.1
CMG	293.8			268.7			801.7			745.0
Total	$	1,726.5		$	1,553.4		$	4,942.0		$	4,502.1
Segment operating income:
IAN	$	180.6		$	111.5		$	343.9		$	268.2
CMG	27.9			23.8			66.6			53.3
Corporate and other	(35.5		)	(33.7		)	(107.8		)	(101.2		)
Total	173.0			101.6			302.7			220.3
Restructuring and other reorganization-related reversals (charges), net	0.2			(1.4		)	(0.8		)	(2.3		)
Interest expense	(32.9		)	(34.7		)	(97.9		)	(102.3		)
Interest income	9.7			6.8			27.7			19.4
Other income (expense), net	137.1			(3.1		)	136.3			(4.7		)
Income before income taxes	$	287.1		$	69.2		$	368.0		$	130.4
Depreciation and amortization of fixed assets and intangible assets:
IAN	$	29.9		$	29.4		$	90.6		$	86.8
CMG	3.1			3.7			9.5			10.7
Corporate and other	3.2			4.2			9.4			14.0
Total	$	36.2		$	37.3		$	109.5		$	111.5
Capital expenditures:
IAN	$	19.3		$	18.0		$	56.1		$	42.3
CMG	3.3			1.8			7.5			3.7
Corporate and other	7.6			1.6			19.7			3.7
Total	$	30.2		$	21.4		$	83.3		$	49.7
	September 30, 2011			December 31, 2010
Total assets:
IAN	$	9,957.9		$	10,481.7
CMG	1,000.4			930.5
Corporate and other	867.6			1,658.6
Total	$	11,825.9		$	13,070.8