Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Other Comprehensive Income (Loss), Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Dec. 30, 2017
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (683)   $ 862  
Other comprehensive income (loss) before reclassifications 314      
Amounts reclassified out of accumulated other comprehensive income (9) $ (240)    
Tax effects (60)      
Other comprehensive income (loss) 245 757    
Unrealized holding gains (losses) on available-for-sale investments [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) 0   1,745 $ 0
Other comprehensive income (loss) before reclassifications 0      
Amounts reclassified out of accumulated other comprehensive income 0      
Tax effects 0      
Other comprehensive income (loss) 0      
Unrealized holding gains (losses) on derivatives [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) 249   106 130
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     24  
Other comprehensive income (loss) before reclassifications 203      
Amounts reclassified out of accumulated other comprehensive income (53)      
Tax effects (31)      
Other comprehensive income (loss) 119      
Actuarial gains (losses) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) (880)   (963) (1,028)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     (65)  
Other comprehensive income (loss) before reclassifications 140      
Amounts reclassified out of accumulated other comprehensive income 45 $ 24    
Tax effects (37)      
Other comprehensive income (loss) 148      
Foreign currency translation adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) (52)   (26) (30)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     (4)  
Other comprehensive income (loss) before reclassifications (29)      
Amounts reclassified out of accumulated other comprehensive income (1)      
Tax effects 8      
Other comprehensive income (loss) (22)      
Accumulated other comprehensive income (loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated other comprehensive income (loss) $ (683)   862 $ (928)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     (1,790)  
Accounting Standards Update 2016-01 [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax     $ (1,745)