Contingencies (Detail) $ / shares in Units, € in Billions, $ in Billions	1 Months Ended
	Jun. 30, 2012 $ / shares	May. 31, 2009 USD ($)	May. 31, 2009 EUR (€)	Aug. 19, 2010 $ / shares
McAfee, Inc. [Member] | McAfee Shareholder Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Cash Per Share of Acquiree Common Stock and Common Stock Subject to Restricted Stock Awards, Vested Restricted Stock Unit Awards, and Vested Performance Stock Unit Awards Upon Completion of Acquisition				$ 48.00
McAfee, Inc. [Member] | McAfee Shareholder Litigation [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Plaintiffs Damages Expert Value Assertion of Share of Acquiree for Purposes of Assessing Damages	$ 62.08
EC Fine [Member]
Loss Contingencies [Line Items]
Loss Contingency, Fine		$ 1.4	€ 1.1