Income Taxes	3 Months Ended
May 02, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We recognized an income tax expense of $132 million and $64 million for the first quarter of fiscal years 2022 and 2021, respectively. The income tax expense as a percentage of income before income tax was 6.5% and 6.6% for the first quarter of fiscal years 2022 and 2021, respectively. The slight decrease in our effective tax rate for the first quarter of fiscal year 2022 as compared to the first quarter of fiscal year 2021 was primarily due to a change in the jurisdiction of earnings, partially offset by a decrease in the impact of tax benefits from the U.S. federal research tax credit. Our effective tax rates for the first quarter of fiscal years 2022 and 2021 were lower than the U.S. federal statutory rate of 21% due to income earned in jurisdictions that are subject to taxes lower than the U.S. federal statutory tax rate, the benefit of the U.S. federal research tax credit, and tax benefits related to stock-based compensation. As of May 2, 2021, we intend to indefinitely reinvest approximately $1.3 billion of cumulative undistributed earnings held by Mellanox non-U.S. subsidiaries. We have not provided the amount of unrecognized deferred tax liabilities for temporary differences related to investments in Mellanox non-U.S. subsidiaries as the determination of such amount is not practicable. For the first quarter of fiscal year 2022, there have been no material changes to our tax years that remain subject to examination by major tax jurisdictions. We are currently under examination by the Internal Revenue Service for our fiscal years 2018 and 2019. Additionally, there have been no material changes to our unrecognized tax benefits and any related interest or penalties since the fiscal year ended January 31, 2021. While we believe that we have adequately provided for all uncertain tax positions, or tax positions where we believe it is not more-likely-than-not that the position will be sustained upon review, amounts asserted by tax authorities could be greater or less than our accrued position. Accordingly, our provisions on federal, state and foreign tax related matters to be recorded in the future may change as revised estimates are made or the underlying matters are settled or otherwise resolved with the respective tax authorities. As of May 2, 2021, we do not believe that our estimates, as otherwise provided for, on such tax positions will significantly increase or decrease within the next 12 months.

Income Taxes

3 Months Ended

May 02, 2021

We recognized an income tax expense of $132 million and $64 million for the first quarter of fiscal years 2022 and 2021, respectively. The income tax expense as a percentage of income before income tax was 6.5% and 6.6% for the first quarter of fiscal years 2022 and 2021, respectively.

The slight decrease in our effective tax rate for the first quarter of fiscal year 2022 as compared to the first quarter of fiscal year 2021 was primarily due to a change in the jurisdiction of earnings, partially offset by a decrease in the impact of tax benefits from the U.S. federal research tax credit.

Our effective tax rates for the first quarter of fiscal years 2022 and 2021 were lower than the U.S. federal statutory rate of 21% due to income earned in jurisdictions that are subject to taxes lower than the U.S. federal statutory tax rate, the benefit of the U.S. federal research tax credit, and tax benefits related to stock-based compensation.

As of May 2, 2021, we intend to indefinitely reinvest approximately $1.3 billion of cumulative undistributed earnings held by Mellanox non-U.S. subsidiaries. We have not provided the amount of unrecognized deferred tax liabilities for temporary differences related to investments in Mellanox non-U.S. subsidiaries as the determination of such amount is not practicable.

For the first quarter of fiscal year 2022, there have been no material changes to our tax years that remain subject to examination by major tax jurisdictions. We are currently under examination by the Internal Revenue Service for our fiscal years 2018 and 2019. Additionally, there have been no material changes to our unrecognized tax benefits and any related interest or penalties since the fiscal year ended January 31, 2021.

While we believe that we have adequately provided for all uncertain tax positions, or tax positions where we believe it is not more-likely-than-not that the position will be sustained upon review, amounts asserted by tax authorities could be greater or less than our accrued position. Accordingly, our provisions on federal, state and foreign tax related matters to be recorded in the future may change as revised estimates are made or the underlying matters are settled or otherwise resolved with the respective tax authorities. As of May 2, 2021, we do not believe that our estimates, as otherwise provided for, on such tax positions will significantly increase or decrease within the next 12 months.