Income Taxes - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 29, 2019	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Oct. 31, 2020	Oct. 31, 2019
Tax Credit Carryforward [Line Items]
U.S. statutory rate					21.00%	21.00%	21.00%	35.00%
Net decrease in tax rate					1.90%
Reversal of deferred tax liability		$ 600				$ 2,800
Reversal of deferred tax asset		200				900
TJCA foreign tax credits, net deferred tax expense (benefit)		$ (400)				$ 1,900
Effective income tax rate reconciliation, increase (decrease), percent						(2.30%)
TJCA, foreign tax credit percent	1.70%	(2.20%)
Increase (decrease) in earnings before taxes, percent			(23.50%)
Effective tax rate reconciliation, litigation settlement, percent			(2.10%)
TCJA, increase (decrease) in deferred tax asset	$ 300
Increase (decrease) in unrecognized tax benefits					$ 300
Effective tax rate reconciliation, unrecognized tax benefits, percent					1.50%
Effective income tax rate reconciliation, other reconciling items, percent					1.20%
Income tax expense recorded related to TRAF					$ 400	$ 100
TRAF effect on tax rate					2.60%	0.60%
Income tax expense related to change in tax rate from TRAF					$ 300	$ 600
Deferred tax asset recorded related to TRAF					450	900
Deferred tax expense related to TRAF					300	450
Tax Cuts and Jobs Act, incomplete accounting, net adjustments for provisional income tax expense (benefit)						200
Deferred tax liability foreign taxes	1,289	$ 1,435	$ 1,289		$ 1,435	1,289
GILTI, deferred tax cost				$ 1,400
Effective income tax rate reconciliation, deduction					(1.20%)
Unrecognized tax benefits	3,853	3,373	3,853	$ 3,326	$ 3,373	3,853	$ 3,326	$ 3,151
Unrecognized tax benefits, interest on income tax expense					32	50	53
Unrecognized tax benefits, interest on income taxes accrued	559	$ 468	559		$ 468	559
Talc
Tax Credit Carryforward [Line Items]
Effective tax rate reconciliation, litigation settlement, percent					23.50%
Opiods
Tax Credit Carryforward [Line Items]
Effective tax rate reconciliation, litigation settlement, percent					21.40%
Consumer
Tax Credit Carryforward [Line Items]
Litigation expense					$ 3,900	400	$ 300
Consumer | Talc
Tax Credit Carryforward [Line Items]
Litigation expense					4,000
Pharmaceutical
Tax Credit Carryforward [Line Items]
Litigation expense					800	4,300
Pharmaceutical | Opiods
Tax Credit Carryforward [Line Items]
Litigation expense					1,000
Internal Revenue Service (IRS)
Tax Credit Carryforward [Line Items]
Payment on unrecognized tax benefit liability					$ 700
Accrued Taxes On Income
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	$ 900		$ 900			$ 900
Pending Litigation
Tax Credit Carryforward [Line Items]
Loss contingency, estimate of possible loss									$ 5,000	$ 4,000