|**Accumulated Other Comprehensive Loss**                                                                                             | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|**Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]**                                                             |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Accumulated Other Comprehensive Loss                                                                                                 | Accumulated Other Comprehensive LossThe components of accumulated other comprehensive loss are summarized below:December 30, 2016 (1)July 1, 2016 (1)(In millions)Foreign currency translation, net of income taxes of $30 million and $29 million at December 30, 2016 and July 1, 2016, respectively$(160)$(131)Net unrealized loss on hedging derivatives, net of income taxes of $11 million at December 30, 2016 and July 1, 2016(19)(18)Unrecognized postretirement obligations, net of income taxes of $213 million at December 30, 2016 and July 1, 2016(344)(346)$(523)$(495)(1)Reclassifications out of accumulated other comprehensive loss to earnings were not material for the two quarters endedDecember 30, 2016orJanuary 1, 2016.
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|                                                                                                                                     | December 30, 2016 (1)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
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|                                                                                                                                     | (In millions)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Foreign currency translation, net of income taxes of $30 million and $29 million at December 30, 2016 and July 1, 2016, respectively | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Net unrealized loss on hedging derivatives, net of income taxes of $11 million at December 30, 2016 and July 1, 2016                 | (19                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Unrecognized postretirement obligations, net of income taxes of $213 million at December 30, 2016 and July 1, 2016                   | (344                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|(1)                                                                                                                                  | Reclassifications out of accumulated other comprehensive loss to earnings were not material for the two quarters endedDecember 30, 2016orJanuary 1, 2016.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         

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duration X- DefinitionThe entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.
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