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Business Combinations - Proposed merger with Avast (Details) $ / shares in Units, $ in Millions	Aug. 10, 2021 USD ($) $ / shares	Oct. 01, 2021 $ / shares	Jul. 13, 2021 $ / shares
Asset Acquisition [Line Items]
Stock closing price (in dollars per share) | $ / shares		$ 25.56	$ 27.20
Minimum | Avast plc
Asset Acquisition [Line Items]
Merger, contingent consideration	$ 8,100
Potential merger agreement termination fee	100
Maximum | Avast plc
Asset Acquisition [Line Items]
Merger, contingent consideration	8,600
Potential merger agreement termination fee	300
Term Loan Interim Facility B
Asset Acquisition [Line Items]
Term loan interim facility	3,600
Interim Revolving Facility A1
Asset Acquisition [Line Items]
Term loan interim facility	750
Term Loan Interim Facility A2
Asset Acquisition [Line Items]
Term loan interim facility	3,500
Interim Revolving Facility
Asset Acquisition [Line Items]
Term loan interim facility	$ 1,500
Cash Option | Avast plc
Asset Acquisition [Line Items]
Merger, share price (in dollars per share) | $ / shares	$ 7.61
Share of our stock (in dollars per share)	0.0302
Stock Option | Avast plc
Asset Acquisition [Line Items]
Merger, share price (in dollars per share) | $ / shares	$ 2.37
Share of our stock (in dollars per share)	0.1937

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