Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 30, 2019	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017	Dec. 30, 2018
Accounting Policies and New Accounting Standards [Line Items]
Assets		$ 17,564	$ 17,780
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		$ 812	893
Payables Financed By Participating Suppliers		605	701
Excess Tax Benefit from Share-based Compensation, Operating Activities		(2)	11	$ 4
Reductions credited to income tax expense		(47)	(1)	$ (28)
Income tax credits and adjustments, transfer of intellectual property		39
Reclassification of tax effects relating to U.S. Tax Reform		$ 0
GILTI percentage excess of shareholder net tested income		50.00%
Credit for percentage of taxes paid or accrued for tested income of controlled foreign corporations		80.00%
Operating lease, right-of-use assets		$ 541	$ 0
Operating lease, liability		$ 547
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