Income Taxes	3 Months Ended
Dec. 28, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In the first quarter of 2014, our effective tax rate was 25% on pre-tax income of $53.1 million compared to a benefit of 197% on pre-tax income of $12.1 million in the first quarter of 2013. In the first quarter of 2014, our effective tax rate was lower than the 35% statutory federal income tax rate due to our corporate structure in which our foreign taxes are at a net effective tax rate lower than the U.S. rate. In the first quarter of 2013, our effective tax rate was lower than the 35% statutory federal income tax rate due primarily to the reversal of a portion of our valuation allowance against net deferred tax assets described below. Our first quarter of 2013 tax benefit did not include a tax benefit on our forecast 2013 U.S. loss as it was offset by a valuation allowance established in the fourth quarter of 2012 as described below. In the fourth quarter of 2012, we recorded a $124.5 million non-cash charge to the income tax provision to establish a valuation allowance against all of our U.S. deferred tax assets. In the first quarter of 2013, our acquisition of Servigistics, Inc. was accounted for as a business combination. Assets acquired, including the fair values of acquired tangible assets, intangible assets (including finite-lived acquired intangible assets totaling $118.3 million) and assumed liabilities were recorded, and we recorded net deferred tax liabilities of $35.6 million primarily related to the tax effect of the acquired intangible assets that are not deductible for income tax purposes. These net deferred tax liabilities reduced our net deferred tax asset balance and resulted in a tax benefit of $32.6 million to decrease our valuation allowance in jurisdictions where we have recorded a valuation allowance (primarily the U.S.). As this decrease in the valuation allowance was not part of the accounting for the business combination (the fair value of the assets acquired and liabilities assumed), it was recorded as an income tax benefit. As of December 28, 2013 and September 30, 2013, we had unrecognized tax benefits of $14.3 million and $13.7 million, respectively. If all of our unrecognized tax benefits as of December 28, 2013 were to become recognizable in the future, we would record a benefit to the income tax provision of $13.4 million which would be partially offset by an increase in the U.S. valuation allowance of $7.2 million. Although we believe our tax estimates are appropriate, the final determination of tax audits and any related litigation could result in favorable or unfavorable changes in our estimates. We believe it is reasonably possible that within the next 12 months the amount of unrecognized tax benefits related to the resolution of multi-jurisdictional tax positions could be reduced by up to $2 million as audits close and statutes of limitations expire. We follow the with-and-without approach for the direct effects of windfall tax deductions to determine the timing of the recognition of benefits for windfall tax deductions. In the first quarter of 2014, we recorded windfall tax benefits of $6.8 million to additional paid-in capital.

Income Taxes

In the first quarter of 2014, our effective tax rate was 25% on pre-tax income of $53.1 million compared to a benefit of 197% on pre-tax income of $12.1 million in the first quarter of 2013. In the first quarter of 2014, our effective tax rate was lower than the 35% statutory federal income tax rate due to our corporate structure in which our foreign taxes are at a net effective tax rate lower than the U.S. rate.

In the first quarter of 2013, our effective tax rate was lower than the 35% statutory federal income tax rate due primarily to the reversal of a portion of our valuation allowance against net deferred tax assets described below. Our first quarter of 2013 tax benefit did not include a tax benefit on our forecast 2013 U.S. loss as it was offset by a valuation allowance established in the fourth quarter of 2012 as described below.

In the fourth quarter of 2012, we recorded a $124.5 million non-cash charge to the income tax provision to establish a valuation allowance against all of our U.S. deferred tax assets. In the first quarter of 2013, our acquisition of Servigistics, Inc. was accounted for as a business combination. Assets acquired, including the fair values of acquired tangible assets, intangible assets (including finite-lived acquired intangible assets totaling $118.3 million) and assumed liabilities were recorded, and we recorded net deferred tax liabilities of $35.6 million primarily related to the tax effect of the acquired intangible assets that are not deductible for income tax purposes. These net deferred tax liabilities reduced our net deferred tax asset balance and resulted in a tax benefit of $32.6 million to decrease our valuation allowance in jurisdictions where we have recorded a valuation allowance (primarily the U.S.). As this decrease in the valuation allowance was not part of the accounting for the business combination (the fair value of the assets acquired and liabilities assumed), it was recorded as an income tax benefit.

As of December 28, 2013 and September 30, 2013, we had unrecognized tax benefits of $14.3 million and $13.7 million, respectively. If all of our unrecognized tax benefits as of December 28, 2013 were to become recognizable in the future, we would record a benefit to the income tax provision of $13.4 million which would be partially offset by an increase in the U.S. valuation allowance of $7.2 million.

Although we believe our tax estimates are appropriate, the final determination of tax audits and any related litigation could result in favorable or unfavorable changes in our estimates. We believe it is reasonably possible that within the next 12 months the amount of unrecognized tax benefits related to the resolution of multi-jurisdictional tax positions could be reduced by up to $2 million as audits close and statutes of limitations expire.

We follow the with-and-without approach for the direct effects of windfall tax deductions to determine the timing of the recognition of benefits for windfall tax deductions. In the first quarter of 2014, we recorded windfall tax benefits of $6.8 million to additional paid-in capital.