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
Mar. 30, 2013
Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income (loss) - beginning balance $ (399)  
Other comprehensive income before reclassifications (1)  
Amounts reclassified out of accumulated other comprehensive ncome 20  
Tax effects (30)  
Other comprehensive income (loss) (11) 177
Accumulated other comprehensive income (loss) - ending balance (410)  
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 273  
Amounts reclassified out of accumulated other comprehensive ncome (4)  
Tax effects (96)  
Other comprehensive income (loss) 173  
Accumulated other comprehensive income (loss) - ending balance 874  
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 0  
Other comprehensive income (loss) 0  
Accumulated other comprehensive income (loss) - ending balance 93  
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 (235)  
Amounts reclassified out of accumulated other comprehensive ncome (2)  
Tax effects 81  
Other comprehensive income (loss) (156)  
Accumulated other comprehensive income (loss) - ending balance (63)  
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 1  
Tax effects 0  
Other comprehensive income (loss) 1  
Accumulated other comprehensive income (loss) - ending balance (31)  
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 29  
Amounts reclassified out of accumulated other comprehensive ncome 25  
Tax effects (20)  
Other comprehensive income (loss) 34  
Accumulated other comprehensive income (loss) - ending balance (1,088)  
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 (68)  
Amounts reclassified out of accumulated other comprehensive ncome 0  
Tax effects 5  
Other comprehensive income (loss) (63)  
Accumulated other comprehensive income (loss) - ending balance $ (195)