Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 01, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Obligations placed in accounts payable tracking system	$ 731	$ 677
Obligations sold by participating suppliers	543	$ 507
Reductions Credited To Income Tax Expense	$ 38

Amount of payables financed by suppliers that had been placed on the accounts payable tracking system which facilitates participating suppliers' ability to finance payment obligations from the company with designated third party financial institutions.

No definition available.

Name:	k_PayablesPlacedOnTrackingSystem
Namespace Prefix:	k_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant