Reportable Segments Supplemental product information (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Oct. 01, 2016 |
Jul. 02, 2016 |
Apr. 02, 2016 |
Jan. 02, 2016 |
Oct. 03, 2015 |
Jul. 04, 2015 |
Apr. 04, 2015 |
Dec. 31, 2016 |
Jan. 02, 2016 |
Jan. 03, 2015 |
|
Segment Reporting Information [Line Items] | |||||||||||
Sales Revenue, Goods, Net | $ 3,097 | $ 3,254 | $ 3,268 | $ 3,395 | $ 3,142 | $ 3,329 | $ 3,498 | $ 3,556 | $ 13,014 | $ 13,525 | $ 14,580 |
Cereal [Member] | |||||||||||
Segment Reporting Information [Line Items] | |||||||||||
Sales Revenue, Goods, Net | 5,440 | 5,871 | 6,570 | ||||||||
Snacks [Member] | |||||||||||
Segment Reporting Information [Line Items] | |||||||||||
Sales Revenue, Goods, Net | 6,660 | 6,698 | 7,002 | ||||||||
Frozen [Member] | |||||||||||
Segment Reporting Information [Line Items] | |||||||||||
Sales Revenue, Goods, Net | $ 914 | $ 956 | $ 1,008 |