New Accounting Standards	9 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
New Accounting Standards	New Accounting Standards In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606), and the FASB has since issued several amendments to this standard, which clarifies the principles for recognizing revenue. This guidance requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard supersedes all existing U.S. GAAP guidance on revenue recognition and is expected to require the use of more judgment and result in additional disclosures. The new standard is effective for annual reporting periods beginning after December 15, 2017. Early adoption is permitted. The Company will be required to adopt the standard as of October 1, 2018. The Company has elected to adopt the new revenue recognition standard following the modified retrospective approach, as permitted by the standard. This approach will result in an adjustment to retained earnings for the cumulative effect of initially applying the new standard on its adoption date. The Company has assembled a cross-functional team with representation from all segments that is dedicated to the implementation of this new accounting standard. The team, with the support of a project management office, is focused on executing a multi-phase plan that will culminate with the adoption of the standard. The cross-functional team continued its focus on concluding and documenting key accounting positions during the three months ended June 30, 2018. Primary differences identified to-date include the changing from a point-in-time method to an over time method for certain defense contracts, the exclusion of unexercised options from the estimate to complete calculation used to measure progress on contracts accounted for under the cost-to-cost method of percentage of completion and the deferral of margin on service-type warranties. The Company's Audit Committee has been receiving regular briefings on the implementation team's progress and potential implications related to adoption of the new standard. The internal control and process changes necessary to comply with the requirements of the new standard as well as its financial impact remain under evaluation. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330), Simplifying the Measurement of Inventory. ASU 2015-11 is part of the FASB’s initiative to simplify accounting standards. The guidance requires an entity to recognize inventory within the scope of the standard at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The Company adopted ASU 2015-11 on October 1, 2017. The adoption of ASU 2015-11 did not have a material impact on the Company's consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires lessees to reflect most leases on their balance sheet as lease liabilities with a corresponding right-of-use asset, while leaving presentation of lease expense in the statement of income largely unchanged. The standard also eliminates the real-estate specific provisions that exist under current U.S. GAAP and modifies the classification criteria and accounting lessors must apply to sales-type and direct financing leases. The Company will be required to adopt ASU 2016-02 and related amendments to the standard as of October 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-02 on the Company's consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The standard requires a change in the measurement approach for credit losses on financial assets measured on an amortized cost basis from an incurred loss method to an expected loss method, thereby eliminating the requirement that a credit loss be considered probable to impact the valuation of a financial asset measured on an amortized cost basis. The standard requires the measurement of expected credit losses to be based on relevant information about past events, including historical experience, current conditions, and a reasonable and supportable forecast that affects the collectibility of the related financial asset. The Company will be required to adopt ASU 2016-13 as of October 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-13 on the Company's consolidated financial statements. In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory. The standard requires that an entity recognize the income tax consequences of an intra-entity transfer of an asset when the transfer occurs as opposed to when the asset is transferred to an outside party as required under current U.S. GAAP. The standard does not apply to intra-entity transfers of inventory, which will continue to follow current U.S. GAAP. The Company will be required to adopt ASU 2016-16 as of October 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-16 on the Company's consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment. The standard simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The standard also clarifies the treatment of the income tax effect of tax deductible goodwill when measuring goodwill impairment loss. The Company will be required to adopt ASU 2017-04 as of October 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2017-04 on the Company's consolidated financial statements. In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715), Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The standard requires that an entity report the service cost component of net periodic pension and postretirement cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The remaining components of net benefit costs are required to be presented in the income statement separately from the service component and outside a subtotal of income from operations, if one is presented. The amendment further allows only the service cost component of net periodic pension and postretirement costs to be eligible for capitalization, when applicable. The Company will be required to adopt ASU 2017-07 as of October 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2017-07 on the Company's consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities. The standard more closely aligns hedge accounting with risk management strategies, simplifies the application of hedge accounting, and increases transparency as to the scope and results of hedging programs. The standard expands and refines hedge accounting for both nonfinancial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The Company adopted ASU 2017-12 on October 1, 2017. The adoption of ASU 2017-12 did not have a material impact on the Company's consolidated financial statements.

New Accounting Standards

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) 2014-09, Revenue from Contracts with Customers (Topic 606), and the FASB has since issued several amendments to this standard, which clarifies the principles for recognizing revenue. This guidance requires an entity to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard supersedes all existing U.S. GAAP guidance on revenue recognition and is expected to require the use of more judgment and result in additional disclosures. The new standard is effective for annual reporting periods beginning after December 15, 2017. Early adoption is permitted. The Company will be required to adopt the standard as of October 1, 2018. The Company has elected to adopt the new revenue recognition standard following the modified retrospective approach, as permitted by the standard. This approach will result in an adjustment to retained earnings for the cumulative effect of initially applying the new standard on its adoption date.

The Company has assembled a cross-functional team with representation from all segments that is dedicated to the implementation of this new accounting standard. The team, with the support of a project management office, is focused on executing a multi-phase plan that will culminate with the adoption of the standard. The cross-functional team continued its focus on concluding and documenting key accounting positions during the three months ended June 30, 2018. Primary differences identified to-date include the changing from a point-in-time method to an over time method for certain defense contracts, the exclusion of unexercised options from the estimate to complete calculation used to measure progress on contracts accounted for under the cost-to-cost method of percentage of completion and the deferral of margin on service-type warranties. The Company's Audit Committee has been receiving regular briefings on the implementation team's progress and potential implications related to adoption of the new standard. The internal control and process changes necessary to comply with the requirements of the new standard as well as its financial impact remain under evaluation.

In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330), Simplifying the Measurement of Inventory. ASU 2015-11 is part of the FASB’s initiative to simplify accounting standards. The guidance requires an entity to recognize inventory within the scope of the standard at the lower of cost or net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. The Company adopted ASU 2015-11 on October 1, 2017. The adoption of ASU 2015-11 did not have a material impact on the Company's consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which requires lessees to reflect most leases on their balance sheet as lease liabilities with a corresponding right-of-use asset, while leaving presentation of lease expense in the statement of income largely unchanged. The standard also eliminates the real-estate specific provisions that exist under current U.S. GAAP and modifies the classification criteria and accounting lessors must apply to sales-type and direct financing leases. The Company will be required to adopt ASU 2016-02 and related amendments to the standard as of October 1, 2019. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-02 on the Company's consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments. The standard requires a change in the measurement approach for credit losses on financial assets measured on an amortized cost basis from an incurred loss method to an expected loss method, thereby eliminating the requirement that a credit loss be considered probable to impact the valuation of a financial asset measured on an amortized cost basis. The standard requires the measurement of expected credit losses to be based on relevant information about past events, including historical experience, current conditions, and a reasonable and supportable forecast that affects the collectibility of the related financial asset. The Company will be required to adopt ASU 2016-13 as of October 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-13 on the Company's consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory. The standard requires that an entity recognize the income tax consequences of an intra-entity transfer of an asset when the transfer occurs as opposed to when the asset is transferred to an outside party as required under current U.S. GAAP. The standard does not apply to intra-entity transfers of inventory, which will continue to follow current U.S. GAAP. The Company will be required to adopt ASU 2016-16 as of October 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2016-16 on the Company's consolidated financial statements.

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350), Simplifying the Test for Goodwill Impairment. The standard simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The standard also clarifies the treatment of the income tax effect of tax deductible goodwill when measuring goodwill impairment loss. The Company will be required to adopt ASU 2017-04 as of October 1, 2020. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2017-04 on the Company's consolidated financial statements.

In March 2017, the FASB issued ASU 2017-07, Compensation - Retirement Benefits (Topic 715), Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The standard requires that an entity report the service cost component of net periodic pension and postretirement cost in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. The remaining components of net benefit costs are required to be presented in the income statement separately from the service component and outside a subtotal of income from operations, if one is presented. The amendment further allows only the service cost component of net periodic pension and postretirement costs to be eligible for capitalization, when applicable. The Company will be required to adopt ASU 2017-07 as of October 1, 2018. Early adoption is permitted. The Company is currently evaluating the impact of ASU 2017-07 on the Company's consolidated financial statements.

In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities. The standard more closely aligns hedge accounting with risk management strategies, simplifies the application of hedge accounting, and increases transparency as to the scope and results of hedging programs. The standard expands and refines hedge accounting for both nonfinancial and financial risk components and aligns the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The Company adopted ASU 2017-12 on October 1, 2017. The adoption of ASU 2017-12 did not have a material impact on the Company's consolidated financial statements.