Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 28, 2020	Jan. 02, 2021	Dec. 28, 2019	Dec. 30, 2018
Accounting Policies and New Accounting Standards [Line Items]
Assets		$ 17,996	$ 17,564
Income tax examination percentage likelihood of being realized upon settlement		50.00%
Maximum length of time, forward contracts and options		18 months
Maximum length of time hedged in price risk cash flow hedge		18 months
Payables Placed On Tracking System		$ 909	812
Payables Financed By Participating Suppliers		670	605
Reclassification of tax effects relating to U.S. Tax Reform			0
Operating lease, right-of-use assets		658	541
Operating lease, liability		$ 637
Minimum
Accounting Policies and New Accounting Standards [Line Items]
Expected rates of return		25th
Maximum
Accounting Policies and New Accounting Standards [Line Items]
Expected rates of return		75th
Machinery and Equipment [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		15 years
Machinery and Equipment [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		30 years
Office Equipment [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Computer Equipment and Capitalized Software [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		3 years
Computer Equipment and Capitalized Software [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		7 years
Building [Member] | Minimum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Building [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		50 years
Building Components [Member] | Maximum
Accounting Policies and New Accounting Standards [Line Items]
Property, Plant and Equipment, Useful Life		20 years
Leases ASU
Accounting Policies and New Accounting Standards [Line Items]
Operating lease, right-of-use assets				$ 453
Operating lease, liability				$ 461
AOCI
Accounting Policies and New Accounting Standards [Line Items]
Reclassification of tax effects relating to U.S. Tax Reform	$ (22)		(22)
Retained earnings
Accounting Policies and New Accounting Standards [Line Items]
Reclassification of tax effects relating to U.S. Tax Reform	$ 22		$ 22