Intangible Assets Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying value of goodwill for our segments, IAN and CMG, for the years ended December 31,2011 and 2010 are listed below.

	IAN			CMG			Total 1
Balance as of December 31, 2009	$	2,844.7		$	476.3		$	3,321.0
Current year acquisitions	37.5			1.3			38.8
Contingent and deferred payments for prior acquisitions	34.4			0.7			35.1
Other 2	(10.6		)	(15.8		)	(26.4		)
Balance as of December 31, 2010	$	2,906.0		$	462.5		$	3,368.5
Current year acquisitions	68.5			28.4			96.9
Contingent and deferred payments for prior acquisitions	0.8			0.0			0.8
Other 2	(22.4		)	0.5			(21.9		)
Balance as of December 31, 2011	$	2,952.9		$	491.4		$	3,444.3

¹  For all periods presented we have not recorded a goodwill impairment charge.

²  Primarily includes foreign currency translation adjustments.

Schedule of Finite-Lived Intangible Assets by Major Class

The following table provides a summary of other intangible assets, which are included in other assets on our Consolidated Balance Sheets.

	December 31,
	2011							2010
	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists	$	165.9	$	(81.7	)	$	84.2	$	147.0	$	(69.0	)	$	78.0
Trade names	52.9		(12.3		)	40.6		45.1		(9.7		)	35.4
Other	17.3		(7.8		)	9.5		17.4		(7.7		)	9.7
Total	$	236.1	$	(101.8	)	$	134.3	$	209.5	$	(86.4	)	$	123.1

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated annual amortization expense for other intangible assets for the next five years as of December 31, 2011 is listed below.

	2012		2013		2014		2015		2016
Estimated amortization expense	$	26.9	$	26.8	$	24.3	$	16.4	$	5.5