Quarterly report pursuant to Section 13 or 15(d)

Comprehensive Income, Accumulated Other Comprehensive Income (Loss) (Detail)

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Comprehensive Income, Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     $ (399)  
Other comprehensive income before reclassifications     2,259  
Amounts reclassified out of accumulated other comprehensive ncome     (24)  
Tax effects     (788)  
Other comprehensive income (loss) 903 356 1,447 280
Accumulated other comprehensive income (loss) - ending balance 1,048   1,048  
Unrealized holding gains (losses) on available-for-sale investments [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     701  
Other comprehensive income before reclassifications     2,258  
Amounts reclassified out of accumulated other comprehensive ncome     (142)  
Tax effects     (740)  
Other comprehensive income (loss)     1,376  
Accumulated other comprehensive income (loss) - ending balance 2,077   2,077  
Accumulated Deferred Tax Asset Valuation Allowance [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     93  
Other comprehensive income before reclassifications     0  
Amounts reclassified out of accumulated other comprehensive ncome     0  
Tax effects     (20)  
Other comprehensive income (loss)     (20)  
Accumulated other comprehensive income (loss) - ending balance 73   73  
Unrealized holding gains (losses) on derivatives [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     93  
Other comprehensive income before reclassifications     (105)  
Amounts reclassified out of accumulated other comprehensive ncome     37  
Tax effects     31  
Other comprehensive income (loss)     (37)  
Accumulated other comprehensive income (loss) - ending balance 56   56  
Prior service credits (costs) [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     (32)  
Other comprehensive income before reclassifications     0  
Amounts reclassified out of accumulated other comprehensive ncome     4  
Tax effects     0  
Other comprehensive income (loss)     4  
Accumulated other comprehensive income (loss) - ending balance (28)   (28)  
Actuarial gains (losses) [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     (1,122)  
Other comprehensive income before reclassifications     77  
Amounts reclassified out of accumulated other comprehensive ncome     77  
Tax effects     (53)  
Other comprehensive income (loss)     101  
Accumulated other comprehensive income (loss) - ending balance (1,021)   (1,021)  
Foreign currency translation adjustment [Member]
        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) - beginning balance     (132)  
Other comprehensive income before reclassifications     29  
Amounts reclassified out of accumulated other comprehensive ncome     0  
Tax effects     (6)  
Other comprehensive income (loss)     23  
Accumulated other comprehensive income (loss) - ending balance $ (109)   $ (109)