Recently Issued Accounting Standards	3 Months Ended
Dec. 31, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Issued Accounting Standards	Recently Issued Accounting Standards In March 2017, the Financial Accounting Standards Board (FASB) issued a new standard on presentation of the net periodic cost of postretirement benefit programs. The new standard requires sponsors of defined benefit postretirement plans to present the non-service cost components of net periodic benefit cost separate from the service cost component on the income statement. The new standard also requires that the non-service cost components of net periodic benefit cost no longer be capitalized within assets. The Company is evaluating the effects the standard will have on the Company's consolidated financial statements and related disclosures beyond the change in income statement presentation. This new standard is effective for the Company in 2019, with early adoption permitted. In February 2016, the FASB issued a comprehensive new lease accounting standard, which provides revised guidance on accounting for lease arrangements by both lessors and lessees. The central requirement of the new standard is that lessees must recognize lease-related assets and liabilities for all leases with a term longer than 12 months. The Company is evaluating the effect the standard will have on the Company's consolidated financial statements and related disclosures, but expects a material change to the balance sheet due to the recognition of right-of-use assets and lease liabilities related to the Company's portfolio of real estate leases. The new guidance is not expected to materially impact accounting for those leases the Company enters into with customers. The new standard is effective for the Company in 2020, with early adoption permitted. In May 2014, the FASB issued a comprehensive new revenue recognition standard that effectively replaces all current guidance on the topic. Several amendments to the new standard have been issued, which are intended to resolve potential implementation challenges and drive consistent interpretation and application of the new standard. The new standard is effective for the Company in 2019, with early adoption permitted, but not earlier than 2018. The guidance permits use of either a retrospective or cumulative effect transition method. The Company's interpretation of the new standard is substantially complete and the Company has prepared an initial assessment of the impacts of adoption on its consolidated financial statements and disclosures. Anticipated changes under the new standard include, among other items, accounting for development costs and associated customer funding related to commercial contracts, increased use of over time revenue recognition based on costs incurred for government contracts and the elimination of customer relationship intangible assets related to free products provided to customers as up-front sales incentives. The new standard also significantly enhances required disclosures regarding revenue and related assets and liabilities. Of the anticipated changes, the Company expects that the change in accounting for commercial contract development costs and associated customer funding is likely to have the most significant impact on its financial statements. Customer funding received for development effort is currently recognized as revenue as the development activities are performed. Under the new standard, the Company has concluded that the development effort does not represent a performance obligation. Therefore, customer funding specific to the development effort must be deferred as a contract liability and recognized as revenue when products are delivered to the customer, delaying the timing of revenue recognition. The Company currently expenses development costs associated with commercial contracts unless the arrangement includes a contractual guarantee for reimbursement from the customer. Upon adoption of the new standard, development costs will be expensed as incurred except for those costs incurred pursuant to customer funding. The amount of development costs eligible for deferral will be equivalent to the associated customer funding. Subsequent to adoption, those deferred development costs will be recognized as expense when products are delivered to the customer, consistent with the amortization of deferred development specific customer funding into revenue. Development costs incurred pursuant to contractual guarantees for reimbursement will no longer be capitalized within Inventory as pre-production engineering costs. The balance of capitalized development costs within Inventory as of the adoption date will be eliminated and the related post-adoption amortization expense avoided. The Company continues to evaluate the impacts associated with the new standard and refine estimated impacts of adoption on the financial statements and related disclosures. The Company is in the process of implementing changes to business processes, systems and internal controls required to implement the new accounting standard. The Company now intends to utilize the modified retrospective transition approach. Other new accounting standards issued but not effective until after December 31, 2017, are not expected to have a material impact on the Company's financial statements.

Recently Issued Accounting Standards

In March 2017, the Financial Accounting Standards Board (FASB) issued a new standard on presentation of the net periodic cost of postretirement benefit programs. The new standard requires sponsors of defined benefit postretirement plans to present the non-service cost components of net periodic benefit cost separate from the service cost component on the income statement. The new standard also requires that the non-service cost components of net periodic benefit cost no longer be capitalized within assets. The Company is evaluating the effects the standard will have on the Company's consolidated financial statements and related disclosures beyond the change in income statement presentation. This new standard is effective for the Company in 2019, with early adoption permitted.

In February 2016, the FASB issued a comprehensive new lease accounting standard, which provides revised guidance on accounting for lease arrangements by both lessors and lessees. The central requirement of the new standard is that lessees must recognize lease-related assets and liabilities for all leases with a term longer than 12 months. The Company is evaluating the effect the standard will have on the Company's consolidated financial statements and related disclosures, but expects a material change to the balance sheet due to the recognition of right-of-use assets and lease liabilities related to the Company's portfolio of real estate leases. The new guidance is not expected to materially impact accounting for those leases the Company enters into with customers. The new standard is effective for the Company in 2020, with early adoption permitted.

In May 2014, the FASB issued a comprehensive new revenue recognition standard that effectively replaces all current guidance on the topic. Several amendments to the new standard have been issued, which are intended to resolve potential implementation challenges and drive consistent interpretation and application of the new standard. The new standard is effective for the Company in 2019, with early adoption permitted, but not earlier than 2018. The guidance permits use of either a retrospective or cumulative effect transition method.

The Company's interpretation of the new standard is substantially complete and the Company has prepared an initial assessment of the impacts of adoption on its consolidated financial statements and disclosures. Anticipated changes under the new standard include, among other items, accounting for development costs and associated customer funding related to commercial contracts, increased use of over time revenue recognition based on costs incurred for government contracts and the elimination of customer relationship intangible assets related to free products provided to customers as up-front sales incentives. The new standard also significantly enhances required disclosures regarding revenue and related assets and liabilities.

Of the anticipated changes, the Company expects that the change in accounting for commercial contract development costs and associated customer funding is likely to have the most significant impact on its financial statements. Customer funding received for development effort is currently recognized as revenue as the development activities are performed. Under the new standard, the Company has concluded that the development effort does not represent a performance obligation. Therefore, customer funding specific to the development effort must be deferred as a contract liability and recognized as revenue when products are delivered to the customer, delaying the timing of revenue recognition. The Company currently expenses development costs associated with commercial contracts unless the arrangement includes a contractual guarantee for reimbursement from the customer. Upon adoption of the new standard, development costs will be expensed as incurred except for those costs incurred pursuant to customer funding. The amount of development costs eligible for deferral will be equivalent to the associated customer funding. Subsequent to adoption, those deferred development costs will be recognized as expense when products are delivered to the customer, consistent with the amortization of deferred development specific customer funding into revenue. Development costs incurred pursuant to contractual guarantees for reimbursement will no longer be capitalized within Inventory as pre-production engineering costs. The balance of capitalized development costs within Inventory as of the adoption date will be eliminated and the related post-adoption amortization expense avoided.

The Company continues to evaluate the impacts associated with the new standard and refine estimated impacts of adoption on the financial statements and related disclosures. The Company is in the process of implementing changes to business processes, systems and internal controls required to implement the new accounting standard. The Company now intends to utilize the modified retrospective transition approach.

Other new accounting standards issued but not effective until after December 31, 2017, are not expected to have a material impact on the Company's financial statements.