Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Operating Loss Carryforwards [Line Items]
Effective income tax rate		24.60%	25.20%	20.60%
U.S. Federal Corporate Tax Rate Prior to Tax Cuts and Jobs Act of 2017		35.00%
U.S. Federal Corporate Tax Rate after Tax Cuts and Jobs Act of 2017		21.00%
Transition tax on unrepatriated earnings of foreign subsidiaries payment term		8 years
Year end tax provision net of reduction in U.S. Corporate tax rate and transition tax		$ 4
Tax benefit from U.S. corporate tax rate reduction		153
Transition tax on accumulated foreign earnings		157
Current portion of transition tax on accumulated foreign earnings		17
Excess Tax Benefit From Share Based Compensation			$ 36
Venezuela Deconsolidation Loss Amount	$ (72)	0	(72)	$ 0
Non-cash gain from deconsolidation		0	0	49
Amount Recognized in Income Due to Inflationary Accounting				112
Accumulated foreign earnings considered permanently reinvested		2,600	1,900	2,000
Deferred Tax Benefit Resulting From Intercompany Transfer Of Intellectual Property		39
Tax benefits of carryforwards	181	239	181
Valuation allowance	131	153	131
Income taxes paid		$ 352	256	337
U.S percentage of tax provision		80.00%
Unrecognized tax benefits classified as current liabilities		$ 8
Projected additions to unrecognized tax benefits related to ongoing intercompany pricing activity		5
Unrecognized tax benefits that would affect the Company's effective tax rate in future periods		47
Income Tax Examination, Interest Expense		2	2	3
Accrued tax-related interest and penalties	$ 19	$ 21	$ 19	17
U.S. Snacks | SGA [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Operating Loss Carryforwards [Line Items]
Non-cash gain from deconsolidation				$ 67