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Contingencies (Detail)
$ / shares in Units, € in Billions, $ in Billions
1 Months Ended 6 Months Ended
Jun. 30, 2012
$ / shares
May 31, 2009
USD ($)
May 31, 2009
EUR (€)
Jun. 30, 2018
lawsuit
Aug. 19, 2010
$ / shares
Class Action [Domain] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       46  
Securities Class Action [Domain] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       3  
Shareholder Derivative Action [Member] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       7  
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 | $ / shares         $ 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 | $ / shares $ 62.08        
EC Fine [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, Damages Paid Value   $ 1.4 € 1.1    
UNITED STATES | Class Action [Domain] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       42  
CANADA | Class Action [Domain] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       2  
ISRAEL | Class Action [Domain] | Pending Litigation [Member]          
Loss Contingencies [Line Items]          
Loss Contingency, New Claims Filed, Number       2