Segments (Tables)

6 Months Ended

Jun. 30, 2014

Business Segment Information

Business Segment Information

(IN MILLIONS)	Buy		Watch		Corporate			Total
Three Months Ended June 30, 2014
Revenues	$	900	$	694	—			$	1,594
Depreciation and amortization	$	57	$	87	$	1		$	145
Restructuring charges	$	4	$	7	$	2		$	13
Stock-based compensation expense	$	3	$	2	$	7		$	12
Operating income/(loss)	$	103	$	203	$	(28	)	$	278
Total assets as of June 30, 2014	$	7,033	$	8,251	$	259		$	15,543

(IN MILLIONS)
Three Months Ended June 30, 2013
Revenues	$	844	$	542	—			$	1,386
Depreciation and amortization	$	52	$	72	$	2		$	126
Restructuring charges	$	6	$	4	$	(2	)	$	8
Stock-based compensation expense	$	4	$	2	$	5		$	11
Operating income/(loss)	$	105	$	159	$	(24	)	$	240
Total assets as of December 31, 2013	$	6,768	$	8,326	$	422		$	15,516

(IN MILLIONS)	Buy		Watch		Corporate			Total
Six Months Ended June 30, 2014
Revenues	$	1,737	$	1,346	—			$	3,083
Depreciation and amortization	$	111	$	173	$	2		$	286
Restructuring charges	$	22	$	10	$	5		$	37
Stock-based compensation expense	$	9	$	6	$	8		$	23
Operating income/(loss)	$	143	$	376	$	(48	)	$	471

(IN MILLIONS)
Six Months Ended June 30, 2013
Revenues	$	1,655	$	1,050	—			$	2,705
Depreciation and amortization	$	100	$	143	$	4		$	247
Restructuring charges	$	17	$	12	$	14		$	43
Stock-based compensation expense	$	7	$	4	$	10		$	21
Operating income/(loss)	$	161	$	278	$	(57	)	$	382