The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Face (par) amount of debt instrument at time of issuance.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Debt - Exchange Agreement (Details) - USD ($)			3 Months Ended
Debt - Exchange Agreement (Details) - USD ($)	May 01, 2021	Apr. 29, 2021	May 01, 2021	May 02, 2020	Apr. 30, 2021	Apr. 20, 2021	Sep. 30, 2016
Debt Instrument [Line Items]
Interest expense			$ 35,141,000	$ 16,830,000
Exchange Agreements
Debt Instrument [Line Items]
Interest expense			5,000,000.0
Convertible Debt
Debt Instrument [Line Items]
Shares issued in conversion (in shares)		7,100,000
Convertible Debt \| Inphi 2021 Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 5,500,000	$ 9,600,000	5,500,000			$ 15,700,000	$ 287,500,000
Shares issued in conversion (in shares)	200,000
Convertible Debt \| Inphi 2021 Convertible Notes \| Exchange Agreements
Debt Instrument [Line Items]
Aggregate principal amount						9,600,000
Convertible Debt \| Inphi 2025 Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 114,000,000.0	$ 199,500,000	$ 114,000,000.0		$ 506,000,000.0	506,000,000.0
Shares issued in conversion (in shares)	2,300,000
Convertible Debt \| Inphi 2025 Convertible Notes \| Exchange Agreements
Debt Instrument [Line Items]
Aggregate principal amount						$ 199,500,000