| Component: (Network and Table) | |
|---|---|
| Network | 2401405 - Disclosure - Summary of Significant Accounting Policies (Inventories) (Details) (http://www.sjm.com/role/SummaryOfSignificantAccountingPoliciesInventoriesDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000203077 (http://www.sec.gov/CIK) |
| Accounting Policies [Abstract] | Period [Axis] | |
|---|---|---|
2016-01-02 | 2015-01-03 | |
Accounting Policies [Abstract] | ||
Finished goods | ||
Work in process | ||
Raw materials | ||
Inventories | 909,000,000 | 784,000,000 |