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Business Combinations - Proposed merger with Avast (Details)	Jan. 28, 2022 USD ($)	Aug. 10, 2021 USD ($) $ / shares	Dec. 31, 2021 $ / shares	Jul. 13, 2021 $ / shares
Asset Acquisition [Line Items]
Stock closing price (in dollars per share) | $ / shares			$ 25.98	$ 27.20
Minimum | Avast plc
Asset Acquisition [Line Items]
Merger, contingent consideration		$ 8,100,000,000
Potential merger agreement termination fee		100,000,000
Maximum | Avast plc
Asset Acquisition [Line Items]
Merger, contingent consideration		8,600,000,000
Potential merger agreement termination fee		300,000,000
Term Loan Interim Facility B
Asset Acquisition [Line Items]
Term loan interim facility		3,600,000,000
Term Loan Interim Facility B | Subsequent Event
Asset Acquisition [Line Items]
Term loan interim facility	$ 3,690,000,000
Interim Revolving Facility A1
Asset Acquisition [Line Items]
Term loan interim facility		750,000,000
Term Loan Interim Facility A2
Asset Acquisition [Line Items]
Term loan interim facility		3,500,000,000
Term Loan Interim Facility A2 | Subsequent Event
Asset Acquisition [Line Items]
Term loan interim facility	3,910,000,000
Interim Revolving Facility
Asset Acquisition [Line Items]
Term loan interim facility		$ 1,500,000,000
Line of Credit | Subsequent Event
Asset Acquisition [Line Items]
Line of credit facility increase	$ 500,000,000
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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