Discontinued Operations - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Feb. 03, 2014 Harris Interactive, Inc.
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Business acquisition price per share of common stock						$ 2.04
Net proceeds associated with sale of business					$ 950
Gain on sale, net of tax		303			303
Loss on shut down of business in discontinued operations			3
Disposal group, including discontinued operation, interest expense	$ 0	$ 3		$ 0	$ 8