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OTHER - Lockheed Martin Ventures Fund (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 28, 2021 | Dec. 31, 2020
Accounting Policies [Abstract] |  |
Carrying amount of investments held in Lockheed Martin Venture Fund | $ 243 | $ 173
Unrealized gain recognized for changes in fair value | 68 |
Unrealized gain recognized for changes in fair value, net of tax | $ 51 |
Unrealized gain recognized for changes in fair value, net of tax (in dollars per share) | $ 0.18 |

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