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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) |

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