Basis of Presentation	6 Months Ended
Aug. 03, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements of Marvell Technology Group Ltd., a Bermuda exempted company, and its wholly owned subsidiaries (the “Company”), as of and for the three and six months ended August 3, 2019, have been prepared as required by the U.S. Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted as permitted by the SEC. These unaudited condensed consolidated financial statements and related notes should be read in conjunction with the Company's fiscal year 2019 audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended February 2, 2019. In the opinion of management, the financial statements include all adjustments, including normal recurring adjustments and other adjustments, that are considered necessary for fair presentation of the Company’s financial position and results of operations. All inter-company accounts and transactions have been eliminated. Operating results for the periods presented herein are not necessarily indicative of the results that may be expected for the entire year. Certain prior year amounts have been reclassified to conform to current year presentation. These amounts were not material to any of the periods presented. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended February 2, 2019 and those included in this Form 10-Q below. The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2019 had a 52-week year. Fiscal 2020 is a 52-week year. On May 6, 2019, the Company announced its intent to acquire Aquantia, Corp. (“Aquantia”), a publicly traded company. It is a manufacturer of high speed transceivers which includes copper and optical physical layer products. The Company will pay Aquantia's stockholders $13.25 per share in cash, or approximately $480 million. The transaction is expected to close by December 2019, subject to regulatory approval as well as other customary closing conditions. On July 10, 2019, Aquantia's stockholders approved the merger agreement. On May 20, 2019, the Company announced its intent to acquire Avera Semiconductor (“Avera”), the application specific integrated circuit (“ASIC”) business of GlobalFoundries Inc. (“GlobalFoundries”). The Company will pay GlobalFoundries $650 million in cash at closing, subject to certain adjustments, plus an additional $90 million in cash if certain business conditions are satisfied within the next 15 months. The transaction is expected to close by January 2020 pending receipt of regulatory approvals and other customary closing conditions. On May 29, 2019, the Company announced its intent to sell its Wi-Fi connectivity business to NXP for $1.76 billion in cash. The divestiture encompasses the Company's Wi-Fi and bluetooth technology portfolios and related assets. The business employs approximately 550 people worldwide and generated approximately $300 million in revenue in the Company's fiscal 2019. This transaction is expected to close by the first quarter of calendar 2020, subject to customary closing conditions and regulatory approvals. As of August 3, 2019, the Company classified assets held for sale of $597.7 million, which consisted of $28.2 million of inventory, $6.1 million of property, plant and equipment, $557.8 million of goodwill and $5.6 million of right-of-use lease asset. In addition, the Company classified liabilities held for sale of $5.6 million associated with lease liability in the condensed consolidated balance sheet.

The unaudited condensed consolidated financial statements of Marvell Technology Group Ltd., a Bermuda exempted company, and its wholly owned subsidiaries (the “Company”), as of and for the three and six months ended August 3, 2019, have been prepared as required by the U.S. Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted as permitted by the SEC. These unaudited condensed consolidated financial statements and related notes should be read in conjunction with the Company's fiscal year 2019 audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended February 2, 2019. In the opinion of management, the financial statements include all adjustments, including normal recurring adjustments and other adjustments, that are considered necessary for fair presentation of the Company’s financial position and results of operations. All inter-company accounts and transactions have been eliminated. Operating results for the periods presented herein are not necessarily indicative of the results that may be expected for the entire year. Certain prior year amounts have been reclassified to conform to current year presentation. These amounts were not material to any of the periods presented. These financial statements should also be read in conjunction with the Company’s critical accounting policies included in the Company’s Annual Report on Form 10-K for the year ended February 2, 2019 and those included in this Form 10-Q below.

The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2019 had a 52-week year. Fiscal 2020 is a 52-week year.

On May 6, 2019, the Company announced its intent to acquire Aquantia, Corp. (“Aquantia”), a publicly traded company. It is a manufacturer of high speed transceivers which includes copper and optical physical layer products. The Company will pay Aquantia's stockholders $13.25 per share in cash, or approximately $480 million. The transaction is expected to close by December 2019, subject to regulatory approval as well as other customary closing conditions. On July 10, 2019, Aquantia's stockholders approved the merger agreement.

On May 20, 2019, the Company announced its intent to acquire Avera Semiconductor (“Avera”), the application specific integrated circuit (“ASIC”) business of GlobalFoundries Inc. (“GlobalFoundries”). The Company will pay GlobalFoundries $650 million in cash at closing, subject to certain adjustments, plus an additional $90 million in cash if certain business conditions are satisfied within the next 15 months. The transaction is expected to close by January 2020 pending receipt of regulatory approvals and other customary closing conditions.

On May 29, 2019, the Company announced its intent to sell its Wi-Fi connectivity business to NXP for $1.76 billion in cash. The divestiture encompasses the Company's Wi-Fi and bluetooth technology portfolios and related assets. The business employs approximately 550 people worldwide and generated approximately $300 million in revenue in the Company's fiscal 2019. This transaction is expected to close by the first quarter of calendar 2020, subject to customary closing conditions and regulatory approvals. As of August 3, 2019, the Company classified assets held for sale of $597.7 million, which consisted of $28.2 million of inventory, $6.1 million of property, plant and equipment, $557.8 million of goodwill and $5.6 million of right-of-use lease asset. In addition, the Company classified liabilities held for sale of $5.6 million associated with lease liability in the condensed consolidated balance sheet.