PENSION AND OTHER POSTRETIREMENT BENEFITS - Funded Status of Plan and Balance Sheet Information (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
Projected benefit obligation	(11,432)	(10,637)	(6,344)
Funded status	(1,832)	(1,745)
Other non-current assets
Consolidated Balance Sheet line item amounts:
Defined benefit plans, current assets	96	92
Compensation and benefits
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	(18)	(18)
Liabilities of disposal group held for sale
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	(4)	0
Defined benefit plans
Consolidated Balance Sheet line item amounts:
Defined benefit plans liabilities, noncurrent	(1,906)	(1,819)
Pension
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,301	8,618	4,958
Projected benefit obligation	(11,045)	(10,268)	(6,123)
Funded status	(1,744)	(1,650)
Pension | Other non-current assets
Consolidated Balance Sheet line item amounts:
Defined benefit plans, current assets	88	91
Pension | Compensation and benefits
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	(10)	(10)
Pension | Liabilities of disposal group held for sale
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	(4)	0
Pension | Defined benefit plans
Consolidated Balance Sheet line item amounts:
Defined benefit plans liabilities, noncurrent	(1,818)	(1,731)
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	299	274	201
Projected benefit obligation	(387)	(369)	$ (221)
Funded status	(88)	(95)
Other Benefits | Other non-current assets
Consolidated Balance Sheet line item amounts:
Defined benefit plans, current assets	8	1
Other Benefits | Compensation and benefits
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	(8)	(8)
Other Benefits | Liabilities of disposal group held for sale
Consolidated Balance Sheet line item amounts:
Defined benefit plan liabilities, current	0	0
Other Benefits | Defined benefit plans
Consolidated Balance Sheet line item amounts:
Defined benefit plans liabilities, noncurrent	$ (88)	$ (88)