Commitments and Contingencies (Details)							1 Months Ended	3 Months Ended		6 Months Ended		69 Months Ended
	May 02, 2022 USD ($) numberOfClaims patent	Feb. 28, 2022 USD ($)	Jun. 08, 2021 USD ($)	May 24, 2021 USD ($)	May 13, 2021 USD ($)	Oct. 21, 2019 USD ($)	Jan. 31, 2014 USD ($)	Sep. 30, 2022 USD ($)	Oct. 01, 2021 USD ($)	Sep. 30, 2022 USD ($)	Oct. 01, 2021 USD ($)	Sep. 30, 2012 USD ($)
Loss Contingencies [Line Items]
Loss contingency, number of patent, claim | patent	6
Litigation settlement payment			$ 70,000,000	$ 70,000,000
Loss contingency, insurance recoveries			$ 67,100,000
Net revenues								$ 748,000,000	$ 692,000,000	$ 1,455,000,000	$ 1,378,000,000
322 Patents Remained in Suit
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | numberOfClaims	2
115 Patents Remained in Suit
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | numberOfClaims	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
Loss contingency, damages awarded, value	$ 0
Estimated loss (low end)								233,000,000		233,000,000
Trustees of the University of Columbia in the City of New York v. NortonLifeLock | Minimum
Loss Contingencies [Line Items]
Estimated litigation payment as times of actual damages proven	1
Trustees of the University of Columbia in the City of New York v. NortonLifeLock | Maximum
Loss Contingencies [Line Items]
Estimated litigation payment as times of actual damages proven	3
GSA Schedule Contract
Loss Contingencies [Line Items]
Litigation settlement payment		$ 5,000,000			$ 500,000
Estimated loss (low end)								$ 50,000,000		$ 50,000,000
Net revenues												$ 222,000,000
Estimated damage						$ 1,090,000,000	$ 145,000,000
GSA Schedule Contract | Minimum
Loss Contingencies [Line Items]
Estimated litigation payment as times of actual damages proven								1		1
GSA Schedule Contract | Maximum
Loss Contingencies [Line Items]
Estimated litigation payment as times of actual damages proven								3		3