Adjustments to Additional Paid in Capital, Increase (Decrease) In Equity Due To Convertible Debt Repayment

No definition available.

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- Definition

Debt Instrument, Covenant Term, Aggregate Acquisition Amount Benchmark

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- Definition

Debt Instrument, Covenant Term, Consolidated Leverage Ratio

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- Definition

Debt Instrument, Number

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- Definition

Debt Instrument, Principal Quarterly Installment Payment As Percentage Of Aggregate Principal Amount

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- Definition

Line Of Credit Facility, Voluntary Prepayment Amount

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- Definition

Undrawn Revolving Line of Credit

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- Definition

Indicates amendment to accounting standards.

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- Definition

Amount of increase (decrease) in additional paid-in capital (APIC) from recognition of substantial premium at which convertible debt instrument is issued.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Debt - Narrative (Details)									3 Months Ended		9 Months Ended		12 Months Ended
Debt - Narrative (Details)	Sep. 19, 2022 USD ($) seniorNote	Sep. 12, 2022 USD ($)	Aug. 15, 2022 USD ($) $ / shares	Jun. 01, 2022 USD ($)	Apr. 02, 2022 USD ($) $ / shares	Apr. 01, 2022 USD ($)	May 07, 2021 USD ($)	Nov. 04, 2019 USD ($)	Dec. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 01, 2022 USD ($)	Jan. 19, 2023 USD ($)
Debt Instrument [Line Items]
Interest expense paid											$ 212,000,000	$ 105,000,000
Gain on extinguishment of debt									$ 0	$ 0	(9,000,000)	$ (5,000,000)
Undrawn revolving line of credit		$ 1,000,000,000
Debt covenant, aggregate acquisition amount benchmark		$ 250,000,000
Stated interest rate					2.00%
Accounting Standards Update [Extensible Enumeration]					Accounting Standards Update 2020-06								Accounting Standards Update 2020-06
Retained earnings						$ (1,940,000,000)			(1,500,000,000)		(1,500,000,000)		$ (1,940,000,000)
Exchange and extinguishment of convertible notes, equity adjustment											100,000,000
Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Debt instrument, unamortized discount					$ 1,000,000
Secured Overnight Financing Rate (SOFR) \| Avast plc
Debt Instrument [Line Items]
Basis spread on variable rate		100.00%
Senior Notes
Debt Instrument [Line Items]
Number of debt instruments \| seniorNote	2
Convertible Debt \| Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Conversion price (in dollars per share) \| $ / shares					$ 0.01
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity, revolving line of credit								$ 1,000,000,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit, amount outstanding									$ 0		$ 0
Term Loan Due November 4, 2024
Debt Instrument [Line Items]
Debt instrument term (in years)								5 years
Principal amount								$ 500,000,000
Delayed Draw Term Loan Due November 4, 2024
Debt Instrument [Line Items]
Debt instrument term (in years)								5 years
Principal amount		$ 1,703,000,000						$ 750,000,000
Quarterly installment payment (as a percent)							1.25%
Interest expense paid		3,000,000
Gain on extinguishment of debt		2,000,000
Delayed Draw Term Loan Due November 4, 2024 \| Line of Credit
Debt Instrument [Line Items]
Gain on extinguishment of debt		$ 4,000,000
First Amendment Additional Term Loan Due May 7, 2026
Debt Instrument [Line Items]
Principal amount							$ 525,000,000
Credit Agreement First Amendment
Debt Instrument [Line Items]
Quarterly installment payment (as a percent)							1.25%
2019 Credit Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate							0.125%
2019 Credit Facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate							1.125%
2019 Credit Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate							0.75%
2019 Credit Facility \| Maximum \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate							1.75%
2019 Credit Facility \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.125%
2019 Credit Facility \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Line of credit facility, commitment fee percentage							0.30%
Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		5.25
Amended and Restated Credit Agreement \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Amended and Restated Credit Agreement \| Minimum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate		0.125%
Amended and Restated Credit Agreement \| Maximum
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		5.75
Amended and Restated Credit Agreement \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Amended and Restated Credit Agreement \| Maximum \| Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Amended and Restated Credit Agreement \| Weighted Average
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		6.0
Amended and Restated Credit Agreement \| Revolving Credit Facility \| Avast plc
Debt Instrument [Line Items]
Principal amount		$ 1,500,000,000
Amended and Restated Credit Agreement \| Term Loan Interim Facility A
Debt Instrument [Line Items]
Quarterly installment payment (as a percent)		1.25%
Amended and Restated Credit Agreement \| Term Loan Interim Facility A \| Avast plc
Debt Instrument [Line Items]
Principal amount		$ 3,910,000,000
Amended and Restated Credit Agreement \| Term Loan Interim Facility B
Debt Instrument [Line Items]
Quarterly installment payment (as a percent)		0.25%
Amended and Restated Credit Agreement \| Term Loan Interim Facility B \| Subsequent Event
Debt Instrument [Line Items]
Woluntary prepayment amount														$ 250,000,000
Amended and Restated Credit Agreement \| Term Loan Interim Facility B \| Avast plc
Debt Instrument [Line Items]
Principal amount		$ 3,690,000,000
Amended and Restated Credit Agreement \| Bridge Loan \| Avast plc
Debt Instrument [Line Items]
Principal amount		750,000,000
Gain on extinguishment of debt		$ 3,000,000
3.95% Senior Notes due June -2022 \| Senior Notes
Debt Instrument [Line Items]
Principal amount				$ 400,000,000
Interest expense paid				$ 7,000,000
Stated interest rate				3.95%					3.95%		3.95%
6.75% And 7.125% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 1,500,000,000
6.75% Senior Notes due September 30, 2027 \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate	6.75%								6.75%		6.75%
7.125% Senior Notes due September 30, 2030 \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate	7.125%								7.125%		7.125%
New 2.00% Convertible Notes \| Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Debt instrument, unamortized discount					$ 1,000,000
Substantial premium					47,000,000
Retained earnings					$ 6,000,000
New 2.00% Convertible Notes \| Convertible Debt
Debt Instrument [Line Items]
Stated interest rate					2.00%
New 2.00% Convertible Notes \| Convertible Debt \| Accounting Standards Update 2020-06
Debt Instrument [Line Items]
Equity component net of tax					$ 56,000,000
Debt instrument, unamortized discount					$ 9,000,000
Substantial premium						$ 47,000,000
New 2.00% Convertible Unsecured Notes due August 15, 2022 \| Convertible Debt
Debt Instrument [Line Items]
Principal amount			$ 525,000,000
Interest expense paid			$ 5,000,000
Stated interest rate									2.00%		2.00%
Conversion price (in dollars per share) \| $ / shares			$ 20.41
New 2.0% Convertible Senior Notes due August 15, 2022 \| Convertible Debt
Debt Instrument [Line Items]
Stated interest rate			2.00%
Payment for debt extinguishment			$ 630,000,000
Exchange and extinguishment of convertible notes, equity adjustment			$ 100,000,000