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INTANGIBLE ASSETS, NET - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 29, 2019 | Jul. 02, 2021 | Jan. 01, 2021 | Jan. 03, 2020 | Dec. 31, 2021 | Jan. 01, 2021 | Jun. 28, 2019
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill impairment | $ 0 |  |  |  | $ 62,000,000 | $ 480,000,000 |
Amortization of Intangible Assets |  |  |  | $ 290,000,000 | 627,000,000 | 729,000,000 |
Exelis |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Amortization of Intangible Assets |  |  |  |  |  |  | $ 115,000,000
Aviation Systems |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  | 62,000,000 | 475,000,000 |
CTS |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Goodwill impairment |  | $ 0 |  |  |  |  |
Impairment of long-lived assets |  |  |  |  | 56,000,000 |  |
Impairment of intangible assets |  |  |  |  | 7,000,000 |  |
CTS | Aviation Systems |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  | 145,000,000 |  |
Impairment of intangible assets |  |  |  |  | $ 63,000,000 |  |
Commercial Aviation Solutions |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  |  |  | $ 257,000,000 |
Impairment of intangible assets |  |  | $ 113,000,000 |  |  |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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