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Share-Based Compensation - Share-Based Compensation and Related Income Tax Benefit (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 23, 2016
Sep. 30, 2017
Sep. 23, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Share-Based Compensation Expense $ 19 $ 9 $ 101 $ 24
Income Tax Benefit 7 3 32 9
Performance Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Share-Based Compensation Expense 3 5 41 9
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Share-Based Compensation Expense 14 2 47 5
Restricted Stock Units and Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Share-Based Compensation Expense 2 2 11 8
Stock Awards for Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total Share-Based Compensation Expense $ 0 $ 0 $ 2 $ 2