Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	Apr. 11, 2018	Sep. 30, 2016	Dec. 28, 2019
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