Income Taxes	9 Months Ended
Oct. 28, 2012
Notes to financial statements [Abstract]
Income Taxes	Income Taxes We recognized income tax expense of $44.5 million and $87.4 million for the three and nine months ended October 28, 2012, respectively, and $26.5 million and $73.8 million for the three and nine months ended October 30, 2011, respectively. Income tax expense as a percentage of income before taxes, or our effective tax rate, was 17.6% and 18.4% for the three and nine months ended October 28, 2012, respectively, and 13.0% and 13.7% for the three and nine months ended October 30, 2011, respectively. The increase in our effective tax rate in fiscal year 2013 as compared to the same periods in the prior fiscal year was primarily related to the expiration of the U.S. federal research tax credit on December 31, 2011, which provided no tax benefit for the three and nine months ended October 28, 2012. Our effective tax rate on income before tax for the first nine months of fiscal year 2013 of 18.4% and fiscal year 2012 of 13.7% were lower than the United States federal statutory rate of 35% due primarily to income earned in jurisdictions where the tax rate is lower than the United States federal statutory tax, and for fiscal year 2012 due to the benefit of the U.S. federal research tax credit. We classify an unrecognized tax benefit as a current liability, or as a reduction of the amount of a net operating loss carryforward or amount refundable, to the extent that we anticipate payment or receipt of cash for income taxes within one year. Likewise, the amount is classified as a long-term liability if we anticipate payment or receipt of cash for income taxes during a period beyond a year. For the nine months ended October 28, 2012, we increased unrecognized tax benefits by approximately $56.2 million, primarily on account of tax position with respect to an acquired tax attribute, and decreased unrecognized tax benefits by $5.0 million, thereby recognizing the related tax benefits, due to the expiration of statutes of limitations in certain non-U.S. jurisdictions. There have been no other significant changes to our unrecognized tax benefits, related interest or penalties from our fiscal year ended January 29, 2012. For the nine months ended October 28, 2012, there have been no material changes to our tax years that remain subject to examination by major tax jurisdictions. While we believe that we have adequately provided for all uncertain tax positions, or tax positions where it is believed not more-likely-than-not that the position will be sustained upon examination, 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 October 28, 2012, we do not believe that our estimates, as otherwise provided for, on such tax positions will significantly increase or decrease within the next twelve months.

Income Taxes

9 Months Ended

Oct. 28, 2012

Notes to financial statements [Abstract]

We recognized income tax expense of $44.5 million and $87.4 million for the three and nine months ended October 28, 2012, respectively, and $26.5 million and $73.8 million for the three and nine months ended October 30, 2011, respectively. Income tax expense as a percentage of income before taxes, or our effective tax rate, was 17.6% and 18.4% for the three and nine months ended October 28, 2012, respectively, and 13.0% and 13.7% for the three and nine months ended October 30, 2011, respectively.

The increase in our effective tax rate in fiscal year 2013 as compared to the same periods in the prior fiscal year was primarily related to the expiration of the U.S. federal research tax credit on December 31, 2011, which provided no tax benefit for the three and nine months ended October 28, 2012.

Our effective tax rate on income before tax for the first nine months of fiscal year 2013 of 18.4% and fiscal year 2012 of 13.7% were lower than the United States federal statutory rate of 35% due primarily to income earned in jurisdictions where the tax rate is lower than the United States federal statutory tax, and for fiscal year 2012 due to the benefit of the U.S. federal research tax credit.

We classify an unrecognized tax benefit as a current liability, or as a reduction of the amount of a net operating loss carryforward or amount refundable, to the extent that we anticipate payment or receipt of cash for income taxes within one year. Likewise, the amount is classified as a long-term liability if we anticipate payment or receipt of cash for income taxes during a period beyond a year. For the nine months ended October 28, 2012, we increased unrecognized tax benefits by approximately $56.2 million, primarily on account of tax position with respect to an acquired tax attribute, and decreased unrecognized tax benefits by $5.0 million, thereby recognizing the related tax benefits, due to the expiration of statutes of limitations in certain non-U.S. jurisdictions. There have been no other significant changes to our unrecognized tax benefits, related interest or penalties from our fiscal year ended January 29, 2012. For the nine months ended October 28, 2012, there have been no material changes to our tax years that remain subject to examination by major tax jurisdictions.

While we believe that we have adequately provided for all uncertain tax positions, or tax positions where it is believed not more-likely-than-not that the position will be sustained upon examination, 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 October 28, 2012, we do not believe that our estimates, as otherwise provided for, on such tax positions will significantly increase or decrease within the next twelve months.