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Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 03, 2020 | Sep. 27, 2019 | Jun. 28, 2019 | Jul. 03, 2020 | Jun. 28, 2019 | Apr. 03, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Non-cash goodwill impairment charge |  | $ 0 |  | $ 369,000,000 |  |
Impairment of long-lived assets | $ 0 |  |  |  |  |
Aviation Systems |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Non-cash goodwill impairment charge |  |  |  | 364,000,000 |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Other AS Disposal Groups | Aviation Systems |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill assigned to disposal group | 14,000,000 |  |  | 14,000,000 |  |
L3Harris |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization expense for intangible assets | 209,000,000 |  |  | 367,000,000 |  |
Exelis |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Amortization expense for intangible assets |  |  | $ 27,000,000 |  | $ 56,000,000 |
Commercial Aviation Solutions |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Non-cash goodwill impairment charge | 54,000,000 |  |  |  |  | $ 296,000,000
Goodwill impairment loss attributable to noncontrolling interests | 8,000,000 |  |  |  |  | $ 28,000,000
Impairment of long-lived assets |  |  |  | $ 0 |  |
Aviation Systems | Disposal Group, Held-for-sale, Not Discontinued Operations | Other AS Disposal Groups |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Non-cash goodwill impairment charge | $ 14,000,000 |  |  |  |  |

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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=121586364&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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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 Reference 2: 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=121586364&loc=d3e3602-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13777-109266 + Details
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