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

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Debt - Additional Information (Details)				12 Months Ended
Debt - Additional Information (Details)	Sep. 19, 2022 USD ($) seniorNote	Sep. 12, 2022 USD ($)	Aug. 15, 2022 USD ($) $ / shares	Mar. 29, 2024 USD ($)	Mar. 31, 2023 USD ($)	Apr. 01, 2022 USD ($)	Feb. 09, 2017 USD ($)
Debt Instrument [Line Items]
Debt covenant, aggregate acquisition amount benchmark		$ 250,000,000
Total principal amount				$ 8,716,000,000	$ 9,899,000,000
Interest expense paid				607,000,000	390,000,000	$ 120,000,000
Exchange and extinguishment of convertible notes, equity adjustment					100,000,000
Senior Notes
Debt Instrument [Line Items]
Number of debt instruments \| seniorNote	2
Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		5.25
Amended and Restated Credit Agreement \| Minimum \| Secured Overnight Financing Rate (SOFR) Plus Credit Spread Adjustment (CSA)
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.125%
Amended and Restated Credit Agreement \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.125%
Amended and Restated Credit Agreement \| Maximum
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		5.75
Amended and Restated Credit Agreement \| Maximum \| Secured Overnight Financing Rate (SOFR) Plus Credit Spread Adjustment (CSA)
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		0.75%
Amended and Restated Credit Agreement \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		1.75%
Amended and Restated Credit Agreement \| Weighted Average
Debt Instrument [Line Items]
Debt covenant, consolidated leverage ratio		6.0
5.0% Senior Notes due April 15, 2025 \| Senior Notes
Debt Instrument [Line Items]
Total principal amount							$ 1,100,000,000
Stated interest rate (as a percent)							5.00%
6.75% Senior Notes due September 30, 2027 \| Senior Notes
Debt Instrument [Line Items]
Total principal amount				$ 900,000,000	900,000,000
Stated interest rate (as a percent)	6.75%			6.75%
7.125% Senior Notes due September 30, 2030 \| Senior Notes
Debt Instrument [Line Items]
Total principal amount				$ 600,000,000	$ 600,000,000
Stated interest rate (as a percent)	7.125%			7.125%
6.75% And 7.125% Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 1,500,000,000
New 2.0% Convertible Senior Notes Due August 15, 2022 \| Convertible Debt
Debt Instrument [Line Items]
Principal amount			$ 525,000,000
Stated interest rate (as a percent)			2.00%
Payment for debt extinguishment			$ 630,000,000
Dilutive earnings per share (in dollars per share) \| $ / shares			$ 20.41
Interest expense paid			$ 5,000,000
Exchange and extinguishment of convertible notes, equity adjustment			$ 100,000,000
Revolving Credit Facility \| Line of Credit
Debt Instrument [Line Items]
Line of credit, amount outstanding				$ 0
Term Loan Interim Facility A \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Quarterly installment payment (as a percent)		1.25%
Term Loan Interim Facility B \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Quarterly installment payment (as a percent)		0.25%
Avast plc \| Revolving Credit Facility \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Principal amount		$ 1,500,000,000
Avast plc \| Term Loan Interim Facility A \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Principal amount		3,910,000,000
Avast plc \| Term Loan Interim Facility B \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Principal amount		3,690,000,000
Avast plc \| Bridge Loan \| Amended and Restated Credit Agreement
Debt Instrument [Line Items]
Principal amount		$ 750,000,000