Segment and Other Supplemental Information - Regional Segment Revenue and Gross Margin for Company (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information
Revenue	$ 552	$ 606	$ 1,696	$ 1,811
Gross margin	298	316	891	941
Stock-based compensation costs	(3)	(3)	(11)	(10)
Amortization of acquisition-related intangible assets costs	0	(4)	(2)	(15)
Acquisition, integration and reorganization-related costs	(1)	(2)	(5)	(5)
Selling, general and administrative expenses	159	179	505	553
Research and development expenses	46	51	154	173
Impairment of goodwill, acquired intangibles and other assets	0	0	80	340
Income (loss) from operations	89	77	134	(155)
Americas Data and Analytics
Segment Reporting Information
Revenue	317	347	937	1,031
Gross margin	185	197	532	580
International Data and Analytics
Segment Reporting Information
Revenue	235	221	690	666
Gross margin	113	104	326	315
Data and Analytics
Segment Reporting Information
Revenue	552	568	1,627	1,697
Gross margin	298	301	858	895
Marketing Applications
Segment Reporting Information
Revenue	0	38	69	114
Gross margin	$ 0	$ 15	$ 33	$ 46

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Amortization of Intangible Assets, Due to Acquisition

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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