Income Taxes	6 Months Ended
Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rates for the three and six months ended March 31, 2018 were 45.6% and 79.2%, respectively. The effective tax rate for the three months ended March 31, 2018 is higher than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to limited tax benefits associated with the restructuring charges taken in foreign jurisdictions of our Industrial Systems segment. The effective tax rate for the six months ended March 31, 2018 was also significantly impacted by the enactment of the Tax Cuts and Jobs Act (the "Act") of 2017. The Act was enacted on December 22, 2017. It reduces the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. As of March 31, 2018, we have not completed the accounting for the tax effects of enactment of the Act; however, as described below, we have made a reasonable estimate of the effects on the one-time transition tax, withholding taxes on earnings deemed to be repatriated and existing deferred tax balances. These amounts are provisional and subject to change as the determination of the impact of the income tax effects will require additional analysis of historical records, annual data and further interpretation of the Act from yet to be issued U.S. Treasury regulations. During the six months ended March 31, 2018, we recorded a $31,300 one-time transition tax on undistributed foreign earnings deemed to be repatriated and a tax charge of $15,910 as an additional provision for taxes on undistributed earnings not considered to be permanently reinvested. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax, or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities is not practicable. These charges are partially offset by a $8,966 benefit due to the remeasurement of deferred tax assets and liabilities arising from a lower U.S. corporate tax rate, which took into account our decision to accelerate pension contributions into our 2017 pension plan year. This allows the pension contribution tax deduction to be taken in our 2017 federal income tax return which is taxed at the 35% federal rate. The effective tax rate for the three and six months ended April 1, 2017 were 34.3% and 27.1%, respectively. The effective tax rate for the three months ended April 1, 2017 is impacted by higher earnings in jurisdictions with higher statutory tax rates and no tax benefit for the losses associated with certain held for sale non-core businesses in Space and Defense Controls. The effective tax rate for the six months ended April 1, 2017 is lower than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to a significant portion of our earnings that come from foreign operations with lower tax rates. Additionally, our effective tax rate in 2017 includes tax benefits associated with selling our European space businesses.

Income Taxes

The effective tax rates for the three and six months ended March 31, 2018 were 45.6% and 79.2%, respectively. The effective tax rate for the three months ended March 31, 2018 is higher than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to limited tax benefits associated with the restructuring charges taken in foreign jurisdictions of our Industrial Systems segment. The effective tax rate for the six months ended March 31, 2018 was also significantly impacted by the enactment of the Tax Cuts and Jobs Act (the "Act") of 2017.

The Act was enacted on December 22, 2017. It reduces the U.S. federal corporate tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred and creates new taxes on certain foreign sourced earnings. As of March 31, 2018, we have not completed the accounting for the tax effects of enactment of the Act; however, as described below, we have made a reasonable estimate of the effects on the one-time transition tax, withholding taxes on earnings deemed to be repatriated and existing deferred tax balances. These amounts are provisional and subject to change as the determination of the impact of the income tax effects will require additional analysis of historical records, annual data and further interpretation of the Act from yet to be issued U.S. Treasury regulations.

During the six months ended March 31, 2018, we recorded a $31,300 one-time transition tax on undistributed foreign earnings deemed to be repatriated and a tax charge of $15,910 as an additional provision for taxes on undistributed earnings not considered to be permanently reinvested. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax, or any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. Determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities is not practicable. These charges are partially offset by a $8,966 benefit due to the remeasurement of deferred tax assets and liabilities arising from a lower U.S. corporate tax rate, which took into account our decision to accelerate pension contributions into our 2017 pension plan year. This allows the pension contribution tax deduction to be taken in our 2017 federal income tax return which is taxed at the 35% federal rate.

The effective tax rate for the three and six months ended April 1, 2017 were 34.3% and 27.1%, respectively. The effective tax rate for the three months ended April 1, 2017 is impacted by higher earnings in jurisdictions with higher statutory tax rates and no tax benefit for the losses associated with certain held for sale non-core businesses in Space and Defense Controls. The effective tax rate for the six months ended April 1, 2017 is lower than would be expected by applying the U.S. federal statutory tax rate to earnings before income taxes primarily due to a significant portion of our earnings that come from foreign operations with lower tax rates. Additionally, our effective tax rate in 2017 includes tax benefits associated with selling our European space businesses.