Segments (Tables)

9 Months Ended

Sep. 30, 2013

Business Segment Information

Business Segment Information

(IN MILLIONS)	Buy		Watch		Expositions		Corporate			Total
Three Months Ended September30, 2013
Revenues	$	871	$	516	$	—	$	—		$	1,387
Depreciation and amortization	$	51	$	64	$	—	$	2		$	117
Restructuring charges	$	10	$	7	$	—	$	3		$	20
Stock-based compensation	$	3	$	3	$	—	$	5		$	11
Operating income/(loss)	$	110	$	160	$	—	$	(26	)	$	244
Total assets as of September30, 2013	$	6,808	$	8,419	$	—	$	476		$	15,703
(IN MILLIONS)	Buy		Watch		Expositions		Corporate			Total
Three Months Ended September30, 2012
Revenues	$	852	$	499	$	—	$	—		$	1,351
Depreciation and amortization	$	52	$	68	$	—	$	4		$	124
Restructuring charges	$	2	$	2	$	—	$	—		$	4
Stock-based compensation	$	3	$	2	$	—	$	5		$	10
Operating income/(loss)	$	118	$	141	$	—	$	(14	)	$	245
Total assets as of December31, 2012	$	6,885	$	6,706	$	758	$	234		$	14,583

(IN MILLIONS)	Buy		Watch		Corporate			Total
Nine Months Ended September30, 2013
Revenues	$	2,563	$	1,529	$	—		$	4,092
Depreciation and amortization	$	156	$	202	$	6		$	364
Restructuring charges	$	28	$	18	$	17		$	63
Stock-based compensation	$	10	$	7	$	15		$	32
Operating income/(loss)	$	270	$	439	$	(83	)	$	626
(IN MILLIONS)	Buy		Watch		Corporate			Total
Nine Months Ended September30, 2012
Revenues	$	2,500	$	1,466	$	—		$	3,966
Depreciation and amortization	$	154	$	204	$	9		$	367
Restructuring charges	$	41	$	14	$	2		$	57
Stock-based compensation	$	7	$	5	$	11		$	23
Operating income/(loss)	$	263	$	389	$	(52	)	$	600