Commitments and Contingencies (Details) Kč in Millions								1 Months Ended	3 Months Ended		9 Months Ended		69 Months Ended
	Jan. 16, 2024 USD ($)	Sep. 30, 2023	Jan. 19, 2023 USD ($)	Jan. 04, 2023 USD ($)	May 02, 2022 USD ($) numberOfClaim coinventor patent	Jun. 08, 2021 USD ($)	May 24, 2021 USD ($)	Jan. 31, 2014 USD ($)	Dec. 27, 2024 USD ($)	Dec. 29, 2023 USD ($)	Dec. 27, 2024 USD ($) lawsuit	Dec. 29, 2023 USD ($)	Sep. 30, 2012 USD ($)	Feb. 27, 2020 USD ($)	Feb. 27, 2020 CZK (Kč)
Loss Contingencies [Line Items]
Loss contingency, number of patent, claim					6						3
Litigation settlement payment				$ 12,000,000		$ 70,000,000	$ 70,000,000		$ 12,000,000
Number of coinventors | coinventor					2
Estimated loss (low end)														$ 15,000,000	Kč 351
Loss contingency, insurance recoveries						$ 67,000,000
Net revenues									986,000,000	$ 948,000,000	$ 2,925,000,000	$ 2,836,000,000
Loss contingency accrual									22,000,000	60,000,000	62,000,000	412,000,000
U.S.
Loss Contingencies [Line Items]
Value of damages awarded	$ 53,000,000		$ 1,300,000
Net revenues									589,000,000	$ 564,000,000	1,752,000,000	$ 1,687,000,000
California
Loss Contingencies [Line Items]
Value of damages awarded			$ 400,000
322 Patents Remained in Suit
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | numberOfClaim					2
115 Patents Remained in Suit
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | numberOfClaim					3
Trustees of the University of Columbia in the City of New York v. NortonLifeLock
Loss Contingencies [Line Items]
Litigation settlement payment					$ 185,000,000
Value of damages awarded					$ 0
Multiplier		2.6
Estimated loss (low end)									$ 594,000,000		$ 594,000,000
GSA Schedule Contract
Loss Contingencies [Line Items]
Net revenues													$ 222,000,000
Estimated damage								$ 145,000,000