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Postretirement Benefit Plans - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2017
Apr. 01, 2016
Mar. 31, 2017
Apr. 01, 2016
Jul. 01, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Net periodic benefit income $ 26 $ 6 $ 79 $ 141  
Defined benefit plan, contributions by employer during period     143 $ 134  
Defined benefit plans, estimated future employer contributions in current fiscal year     $ 446    
U.S SRP          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Value of defined benefit pension plan assets         $ 3,800
Projected benefit obligation of defined pension plan         $ 5,900
Cash balance percentage to replace frozen benefits under defined pension plan 1.00%   1.00%    
Change in Assumptions for Pension Plans | U.S SRP          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Net periodic benefit income     $ 35    
Discontinued Operations | Discontinued Operations, Net of Income Taxes          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Net periodic benefit income $ 1   $ 2