Segment Information (Tables)

9 Months Ended

Sep. 30, 2014

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,
	2014			2013			2014			2013
Revenue:
IAN	$	1,464.6		$	1,370.9		$	4,276.3		$	4,047.7
CMG	376.5			329.5			1,053.7			951.9
Total	$	1,841.1		$	1,700.4		$	5,330.0		$	4,999.6
Segment operating income (loss):
IAN	$	165.5		$	119.9		$	361.0		$	266.5
CMG	47.0			39.7			105.8			88.3
Corporate and other	(41.2		)	(18.1		)	(111.4		)	(80.9		)
Total	171.3			141.5			355.4			273.9
Interest expense	(20.7		)	(23.7		)	(63.5		)	(98.0		)
Interest income	7.5			5.8			20.3			18.0
Other expense, net	(0.6		)	(46.6		)	(10.1		)	(40.0		)
Income before income taxes	$	157.5		$	77.0		$	302.1		$	153.9
Depreciation and amortization of fixed assets and intangible assets:
IAN	$	31.0		$	32.9		$	92.7		$	95.4
CMG	4.9			3.9			13.7			11.6
Corporate and other	5.1			3.7			15.3			10.9
Total	$	41.0		$	40.5		$	121.7		$	117.9
Capital expenditures:
IAN	$	20.9		$	24.5		$	52.0		$	48.0
CMG	2.6			2.4			8.2			6.5
Corporate and other	12.2			17.9			34.2			37.1
Total	$	35.7		$	44.8		$	94.4		$	91.6
	September 30, 2014			December 31, 2013
Total assets:
IAN	$	10,689.4		$	11,425.1
CMG	1,311.5			1,203.8
Corporate and other	(222.5		)	276.1
Total	$	11,778.4		$	12,905.0