Segments (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Segment Reporting [Abstract]

Business Segment Information

Business Segment Information

(IN MILLIONS)	Buy		Watch		Expositions		Corporate			Total
Three Months Ended March 31, 2013
Revenues	$	825	$	494	$	57	$	—		$	1,376
Depreciation and amortization	$	51	$	68	$	6	$	1		$	126
Restructuring charges	$	12	$	7	$	—	$	16		$	35
Stock-based compensation expense	$	3	$	2	$	—	$	5		$	10
Operating income/(loss)	$	53	$	122	$	26	$	(30	)	$	171
Total assets as of March 31, 2013	$	6,705	$	6,696	$	752	$	261		$	14,414
(IN MILLIONS)	Buy		Watch		Expositions		Corporate			Total
Three Months Ended March 31, 2012
Revenues	$	799	$	474	$	61	$	—		$	1,334
Depreciation and amortization	$	53	$	68	$	6	$	2		$	129
Restructuring charges	$	31	$	5	$	—	$	1		$	37
Stock-based compensation expense	$	2	$	2	$	—	$	4		$	8
Operating income/(loss)	$	35	$	111	$	30	$	(18	)	$	158
Total assets as of December 31, 2012	$	6,885	$	6,706	$	758	$	234		$	14,583

Business Segment Information

	Year Ended December 31,
(IN MILLIONS)	2012			2011			2010
Revenues
Buy	$	3,420		$	3,409		$	3,108
Watch		1,987			1,919			1,827
Expositions		183			179			168
Total	$	5,590		$	5,507		$	5,103
	Year Ended December 31,
(IN MILLIONS)	2012			2011			2010
Depreciation and amortization
Buy	$	208		$	198		$	202
Watch		274			294			313
Expositions		23			25			27
Corporate and eliminations		8			7			12
Total	$	513		$	524		$	554
	Year Ended December 31,
(IN MILLIONS)	2012			2011			2010
Restructuring charges
Buy	$	60		$	57		$	27
Watch		18			15			15
Expositions		(1	)		2			2
Corporate and eliminations		7			10			17
Total	$	84		$	84		$	61
	Year Ended December 31,
(IN MILLIONS)	2012			2011			2010
Stock-based compensation expense
Buy	$	10		$	8		$	7
Watch		7			5			3
Expositions		—			—			—
Corporate and eliminations		16			13			8
Total	$	33		$	26		$	18
	Year Ended December 31,
(IN MILLIONS)	2012			2011			2010
Operating income/(loss)
Buy	$	409		$	432		$	414
Watch		547			464			368
Expositions		72			60			49
Corporate and eliminations		(64	)		(158	)		(100	)
Total	$	964		$	798		$	731

(IN MILLIONS)	December 31, 2012		December 31, 2011
Total assets
Buy	$	6,885	$	6,782
Watch		6,706		6,560
Expositions		758		794
Corporate and eliminations(1)		234		336
Total	$	14,583	$	14,472

(1) Includes deferred financing costs of $60 million and $68 million as of December 31, 2012 and 2011, respectively.

	Year ended December 31,
(IN MILLIONS)	2012		2011		2010
Capital expenditures
Buy	$	171	$	178	$	156
Watch		179		182		164
Expositions		5		7		6
Corporate and eliminations		3		—		8
Total	$	358	$	367	$	334

Geographic Segment Information

Geographic Segment Information

(IN MILLIONS)	Revenues(1)		Operating Income/ (Loss)			Long- lived Assets(2)
2012
United States	$	2,820	$	529		$	9,540
North and South America, excluding the United States		640		170			1,313
The Netherlands		39		4			8
Other Europe, Middle East & Africa		1,353		178			1,097
Asia Pacific		738		83			509
Total	$	5,590	$	964		$	12,467
(IN MILLIONS)	Revenues(1)		Operating Income/ (Loss)			Long- lived Assets(2)
2011
United States	$	2,677	$	425		$	9,531
North and South America, excluding the United States		625		184			1,212
The Netherlands		43		(90	)		3
Other Europe, Middle East & Africa		1,447		184			1,074
Asia Pacific		715		95			505
Total	$	5,507	$	798		$	12,325

(IN MILLIONS)	Revenues(1)		Operating Income/ (Loss)
2010
United States	$	2,557	$	297
North and South America, excluding the United States		551		157
The Netherlands		41		(5	)
Other Europe, Middle East & Africa		1,330		191
Asia Pacific		624		91
Total	$	5,103	$	731

(1) Revenues are attributed to geographic areas based on the location of customers.

(2) Long-lived assets include property, plant and equipment, goodwill and other intangible assets.