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PENSION AND OTHER POSTRETIREMENT BENEFITS - Reconciliation of Defined Benefit Plan Asset Balances (Details) - USD ($) $ in Millions	Jan. 01, 2021	Jan. 03, 2020	Jun. 29, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 9,600	$ 8,892	$ 5,159
Investments Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,254	1,901
Total | Total
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,395	6,986
Total | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,129	4,514
Total | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,239	2,453
Total | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	19
Domestic equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,513	2,968
Domestic equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,513	2,968
Domestic equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Domestic equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International equities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,280	1,217
International equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,280	1,217
International equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
International equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate Investment Trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	197	211
Real Estate Investment Trusts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	197	211
Real Estate Investment Trusts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real Estate Investment Trusts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,447	1,176
Corporate bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,422	1,159
Corporate bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25	17
Government securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	485	489
Government securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Government securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	485	489
Government securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Securitized assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	150	131
Securitized assets | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Securitized assets | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	150	131
Securitized assets | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	119	101
Fixed income funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	119	101
Fixed income funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed income funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	202	691
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	17
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	182	674
Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 3,088	$ 933
Investments Measured at NAV	us-gaap:FairValueMeasurementsFairValueHierarchyDomain	us-gaap:FairValueMeasurementsFairValueHierarchyDomain
Fixed income funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 532	$ 323
Investments Measured at NAV	us-gaap:FairValueMeasurementsFairValueHierarchyDomain	us-gaap:FairValueMeasurementsFairValueHierarchyDomain
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 321	$ 342
Investments Measured at NAV	us-gaap:FairValueMeasurementsFairValueHierarchyDomain	us-gaap:FairValueMeasurementsFairValueHierarchyDomain
Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 312	$ 302
Investments Measured at NAV	us-gaap:FairValueMeasurementsFairValueHierarchyDomain	us-gaap:FairValueMeasurementsFairValueHierarchyDomain
Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1	$ 1
Investments Measured at NAV	us-gaap:FairValueMeasurementsFairValueHierarchyDomain	us-gaap:FairValueMeasurementsFairValueHierarchyDomain
Payables (receivables), net
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ (49)	$ 5

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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