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Reportable Segments Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]                      
Number of Operating Segments                 10    
Number of Remaining Reportable Segments Which are Based on Geographical Location                 3    
Net sales $ 3,317 $ 3,469 $ 3,360 $ 3,401 $ 3,185 $ 3,246 $ 3,175 $ 3,248 $ 13,547 $ 12,854 $ 12,965
Walmart Stores Inc [Member]                      
Segment Reporting Information [Line Items]                      
Largest customer, percentage of consolidated net sales                 19.00% 20.00% 20.00%
Cookie and fruit snacks                      
Segment Reporting Information [Line Items]                      
Net sales                 $ 900