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OTHER - Changes in Estimates (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 24, 2017 | Mar. 26, 2017 | Sep. 25, 2016 | Jun. 25, 2017 | Sep. 24, 2017 | Sep. 25, 2016
Accounting Policies [Abstract] |  |  |  |  |  |
Additional charge for performance matter on EADGE-T, gross |  | $ 120 |  |  |  |
Additional charge for performance matter on EADGE-T, after tax |  | $ 74 |  |  |  |
Additional charge for performance matter on EADGE-T, after tax (in dollars per share) |  | $ 0.25 |  |  |  |
Cumulative losses, including reserves |  |  |  |  | $ 260 |
Valuation Allowance [Line Items] |  |  |  |  |  |
Increase in operating profit due to profit rate adjustments | $ 330 |  | $ 405 |  | 1,100 | $ 1,100
Increase in net earnings due to profit rate adjustments | $ 214 |  | $ 265 |  | $ 718 | $ 730
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) | $ 0.74 |  | $ 0.88 |  | $ 2.46 | $ 2.39
A2100 |  |  |  |  |  |
Valuation Allowance [Line Items] |  |  |  |  |  |
Commercial satellite cumulative losses on development |  |  |  | $ 260 |  |
Commercial satellite losses on development |  |  |  | $ 90 |  |

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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