Income Taxes (Narrative) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 29, 2018	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Effective income tax rate		13.60%	24.80%	25.20%
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			$ 8
Tax benefit from U.S. corporate tax rate reduction		$ (11)
Transition tax estimate	$ (16)
Discrete tax expense related to changes in our reinvestment assertion		5
Remeasurement of deferred taxes Tax Cuts Jobs Act of 2017			149
Transition tax liability on accumulated foreign earnings	$ (16)	94	157
Tax reserves for transition tax on foreign earnings		47
Pension contributions		287	44	$ 33
Discrete tax benefit remeasurement of deferred taxes following a legal entity restructuring		44
Undistributed earnings of foreign subsidiaries		700	2,400
Amount of unrecognized deferred tax liability on undistributed earnings of foreign subsidiaries		20
Excess Tax Benefit From Share Based Compensation				36
Venezuela Deconsolidation Loss Amount		0	0	(72)
Accumulated foreign earnings considered permanently reinvested			2,600
Deferred Tax Benefit Resulting From Intercompany Transfer Of Intellectual Property			39
Tax benefits of carryforwards		270	239
Valuation allowance		166	153
Income taxes paid		$ 188	352	$ 256
U.S percentage of tax provision		65.00%
Unrecognized tax benefits classified as current liabilities		$ 12
Projected additions to unrecognized tax benefits related to ongoing intercompany pricing activity		4
Unrecognized tax benefits that would affect the Company's effective tax rate in future periods		86
Deferred Tax Liabilities, Gross		852	588
Deferred tax liabilities		484	$ 109
Discretionary pension contribution
Operating Loss Carryforwards [Line Items]
Pension contributions		250
Multipro
Operating Loss Carryforwards [Line Items]
Deferred tax liabilities		$ 253