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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions | Apr. 11, 2018 | Sep. 30, 2016 | Dec. 28, 2019
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Commitments and Contingencies Disclosure [Line Items] |  |  |
Unconditional purchase obligations |  |  | $ 10,500
VirnetX I | Pending litigation |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Award from legal proceeding, due to other party |  | $ 302 |
Award from legal proceeding, due to other party, revised amount, determined in subsequent proceedings |  | $ 440 |
VirnetX II | Pending litigation |  |  |
Commitments and Contingencies Disclosure [Line Items] |  |  |
Award from legal proceeding, due to other party | $ 503 |  |

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