Income Taxes	9 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES The income tax benefit for the nine months ended June 30, 2018 included certain discrete benefits of $25,378 for the estimated impact of the Tax Act enacted into law on December 22, 2017. The discrete benefits primarily related to $32,264 of estimated benefit from the remeasurement of our estimated net deferred tax liabilities, partially offset by $6,886 of estimated expense associated with the mandatory deemed repatriation tax. Excluding the impact of these discrete benefits, the effective tax rate for the nine months ended June 30, 2018 increased compared to the prior year primarily due to higher earnings before taxes, partially offset by the lower U.S. corporate tax rate under the Tax Act. In March 2018, the FASB issued ASU No. 2018-05 which incorporates various SEC paragraphs from SAB 118 into income tax accounting guidance effective immediately, allowing registrants to record provisional amounts during a one-year measurement period. The updated guidance summarizes a three-step process to be applied at each reporting period to account for and qualitatively disclose: (i) the effects of the change in tax law for which accounting is complete; (ii) provisional amounts (or adjustments to provisional amounts) for the effects of the tax law where accounting is not complete, but that a reasonable estimate has been determined; and (iii) if a reasonable estimate cannot yet be made and therefore taxes are reflected in accordance with law prior to the enactment of the Tax Act. See Note 2 for additional information on the adoption of this guidance. Amounts recorded where the accounting is complete during the nine months ended June 30, 2018 primarily relate to the reduction in the U.S. corporate income tax rate to 21%. We recorded an income tax benefit of $32,244 to remeasure deferred tax liabilities associated with intangible assets that will reverse at the new 21% rate. Amounts recorded where the accounting is provisional during the nine months ended June 30, 2018 include the remeasurement of other deferred taxes where the timing of the reversal cannot be known at this time. We have performed a provisional estimate of the net impact of remeasurement of other deferred tax assets and liabilities and recorded a $20 income tax benefit during the nine months ended June 30, 2018. In addition, the Tax Act includes a one-time mandatory repatriation transition tax on the net accumulated earnings and profits of our foreign subsidiaries. We have performed a provisional estimate of this tax and recorded a $6,886 income tax provision during the nine months ended June 30, 2018. The provisional amounts are based on information available at this time and may change due to a variety of factors, including, among others, anticipated guidance from the U.S. Department of Treasury about implementing the Tax Act and management's further assessment of the Tax Act and related regulatory guidance. We have completed our initial analysis of the impact of all provisions of the Tax Act expected to be effective in fiscal year 2018, and there are no anticipated effects of the Tax Act where we have not yet recorded a provisional estimate of the accounting effect as of June 30, 2018. The full-year estimated annual effective tax rate, which excludes the impact of discrete items, was 17.3% as of June 30, 2018, as compared to 11.6% as of July 1, 2017. This increase is primarily due to higher earnings before taxes, partially offset by the reduction of the U.S. federal statutory rate from 35.0% to 24.5%, a blended rate based upon our fiscal year. The income tax benefit for the three and nine months ended July 1, 2017 included certain discrete benefits of $2,801 recognized during the three months ended July 1, 2017 which consisted of additional U.S. tax benefits for prior fiscal years associated with domestic manufacturing, deductible PCB acquisition-related expenses and U.S. R&D tax credit. As of June 30, 2018, the liability for unrecognized tax benefits was $6,119, of which $3,531 would favorably affect our effective tax rate, if recognized. As of September 30, 2017, the liability for unrecognized tax benefits was $5,849, of which $3,234 would favorably affect our effective tax rate, if recognized. As of June 30, 2018, we do not expect significant changes in the amount of unrecognized tax benefits during the next twelve months.

INCOME TAXES

The income tax benefit for the nine months ended June 30, 2018 included certain discrete benefits of $25,378 for the estimated impact of the Tax Act enacted into law on December 22, 2017. The discrete benefits primarily related to $32,264 of estimated benefit from the remeasurement of our estimated net deferred tax liabilities, partially offset by $6,886 of estimated expense associated with the mandatory deemed repatriation tax. Excluding the impact of these discrete benefits, the effective tax rate for the nine months ended June 30, 2018 increased compared to the prior year primarily due to higher earnings before taxes, partially offset by the lower U.S. corporate tax rate under the Tax Act.

In March 2018, the FASB issued ASU No. 2018-05 which incorporates various SEC paragraphs from SAB 118 into income tax accounting guidance effective immediately, allowing registrants to record provisional amounts during a one-year measurement period. The updated guidance summarizes a three-step process to be applied at each reporting period to account for and qualitatively disclose: (i) the effects of the change in tax law for which accounting is complete; (ii) provisional amounts (or adjustments to provisional amounts) for the effects of the tax law where accounting is not complete, but that a reasonable estimate has been determined; and (iii) if a reasonable estimate cannot yet be made and therefore taxes are reflected in accordance with law prior to the enactment of the Tax Act. See Note 2 for additional information on the adoption of this guidance.

Amounts recorded where the accounting is complete during the nine months ended June 30, 2018 primarily relate to the reduction in the U.S. corporate income tax rate to 21%. We recorded an income tax benefit of $32,244 to remeasure deferred tax liabilities associated with intangible assets that will reverse at the new 21% rate.

Amounts recorded where the accounting is provisional during the nine months ended June 30, 2018 include the remeasurement of other deferred taxes where the timing of the reversal cannot be known at this time. We have performed a provisional estimate of the net impact of remeasurement of other deferred tax assets and liabilities and recorded a $20 income tax benefit during the nine months ended June 30, 2018. In addition, the Tax Act includes a one-time mandatory repatriation transition tax on the net accumulated earnings and profits of our foreign subsidiaries. We have performed a provisional estimate of this tax and recorded a $6,886 income tax provision during the nine months ended June 30, 2018. The provisional amounts are based on information available at this time and may change due to a variety of factors, including, among others, anticipated guidance from the U.S. Department of Treasury about implementing the Tax Act and management's further assessment of the Tax Act and related regulatory guidance.

We have completed our initial analysis of the impact of all provisions of the Tax Act expected to be effective in fiscal year 2018, and there are no anticipated effects of the Tax Act where we have not yet recorded a provisional estimate of the accounting effect as of June 30, 2018.

The full-year estimated annual effective tax rate, which excludes the impact of discrete items, was 17.3% as of June 30, 2018, as compared to 11.6% as of July 1, 2017. This increase is primarily due to higher earnings before taxes, partially offset by the reduction of the U.S. federal statutory rate from 35.0% to 24.5%, a blended rate based upon our fiscal year.

The income tax benefit for the three and nine months ended July 1, 2017 included certain discrete benefits of $2,801 recognized during the three months ended July 1, 2017 which consisted of additional U.S. tax benefits for prior fiscal years associated with domestic manufacturing, deductible PCB acquisition-related expenses and U.S. R&D tax credit.

As of June 30, 2018, the liability for unrecognized tax benefits was $6,119, of which $3,531 would favorably affect our effective tax rate, if recognized. As of September 30, 2017, the liability for unrecognized tax benefits was $5,849, of which $3,234 would favorably affect our effective tax rate, if recognized. As of June 30, 2018, we do not expect significant changes in the amount of unrecognized tax benefits during the next twelve months.