Quarterly report pursuant to Section 13 or 15(d)

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

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Other Comprehensive Income (Loss), Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 28, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 1,120   $ 1,120   $ 1,243
Other comprehensive income before reclassifications     (42)    
Amounts reclassified out of accumulated other comprehensive income (loss)     (118)    
Tax effects     37    
Other comprehensive income (loss) (36) 555 (123) 544  
Unrealized holding gains (losses) on available-for-sale investments [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment Including Other Than Temporary Impairments, Net of Tax 1,796   1,796   1,882
Other comprehensive income before reclassifications     (13)    
Amounts reclassified out of accumulated other comprehensive income (loss)     (121)    
Tax effects     48    
Other comprehensive income (loss)     (86)    
Deferred Tax Asset Valuation Allowance [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other comprehensive income before reclassifications     0    
Amounts reclassified out of accumulated other comprehensive income (loss)     0    
Tax effects     (4)    
Other comprehensive income (loss)     (4)    
Accumulated Other Comprehensive Income (Loss), Net Change In Deferred Tax Asset Valuation Allowance 63   63   67
Unrealized holding gains (losses) on derivatives [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other comprehensive income before reclassifications     38    
Amounts reclassified out of accumulated other comprehensive income (loss)     (18)    
Tax effects     (9)    
Other comprehensive income (loss)     11    
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax 15   15   4
Prior service credits (costs) [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other comprehensive income before reclassifications     (50)    
Amounts reclassified out of accumulated other comprehensive income (loss)     2    
Tax effects     5    
Other comprehensive income (loss)     (43)    
Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost, Net Of Tax (57)   (57)   (14)
Actuarial gains (losses) [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other comprehensive income before reclassifications     (10)    
Amounts reclassified out of accumulated other comprehensive income (loss)     19    
Tax effects     (4)    
Other comprehensive income (loss)     5    
Accumulated Other Comprehensive Income (Loss), Net Actuarial Gains Loss, Net Of Tax (597)   (597)   (602)
Foreign currency translation adjustment [Member]
          
Accumulated Other Comprehensive Income (Loss) [Line Items]          
Other comprehensive income before reclassifications     (7)    
Amounts reclassified out of accumulated other comprehensive income (loss)     0    
Tax effects     1    
Other comprehensive income (loss)     (6)    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax $ (100)   $ (100)   $ (94)