Summary of Significant Accounting Policies Recently Issued Accounting Pronouncements (Tables)	9 Months Ended
Jun. 30, 2018
Recently Issued Accounting Pronouncements [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Standards In January 2018, the FASB issued ASU 2018-02, "Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("AOCI"), which is effective for fiscal years beginning after December 15, 2018 and interim periods therein, with early adoption permitted. The guidance gives entities the option to reclassify to retained earnings the tax effects resulting from the Tax Cuts and Jobs Act ("TCJA") related to items in AOCI. The new guidance may be applied retrospectively to each period in which the effect of the Act is recognized in the period of adoption. We do not expect the implementation to have a material impact on our consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments" ("ASU 2016-15"), which is effective for fiscal years beginning after December 15, 2017 and the interim periods therein, with early adoption permitted. The guidance requires cash flows with multiple characteristics to be classified using a three-step process, including (i) determining whether explicit guidance is applicable, (ii) separating each identifiable source or use of cash flows, and (iii) determining the predominant source or use of cash flows when the source or use of cash flows cannot be separately identifiable. The guidance will be applied retrospectively to each period presented. We do not expect the implementation to have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases" ("ASU 2016-02"). ASU 2016-02 requires lessees to recognize on the balance sheet a right-of-use asset, representing its right to use the underlying asset for the lease term, and a lease liability for all leases with terms greater than 12 months. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing, and uncertainty of cash flows arising from leases. The standard requires the use of a modified retrospective transition approach, which includes a number of optional practical expedients that entities may elect to apply. ASU 2016-02 is effective for us in the first quarter of fiscal year 2020, and early application is permitted. We are currently evaluating the impact of our pending adoption of ASU 2016-02 on our consolidated financial statements, and we currently expect that most of our operating lease commitments will be subject to the new standard and recognized as operating lease liabilities and right-of-use assets upon our adoption of ASU 2016-02, which will increase our total assets and total liabilities that we report relative to such amounts prior to adoption. In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities" ("ASU 2016-01"). ASU 2016-01 amends the guidance on the classification and measurement of financial instruments. Although ASU 2016-01 retains many current requirements, it significantly revises accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. ASU 2016-01 also amends certain disclosure requirements associated with the fair value of financial instruments and is effective for us in the first quarter of fiscal year 2019. Based on the composition of our investment portfolio, we do not believe the adoption of ASU 2016-01 will have a material impact on our consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers: Topic 606" ("ASU 2014-09"), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 permits two methods of adoption: (i) retrospective to each prior reporting period presented; or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date, which deferred the effective date of the new revenue standard for periods beginning after December 15, 2016 to December 15, 2017, with early adoption permitted but not earlier than the original effective date. ASU 2014-09 is effective for us beginning on October 1, 2018 and we plan to adopt ASU 2014-09 using the cumulative catch-up transition method, with a cumulative adjustment to retained earnings as opposed to retrospectively adjusting prior periods. In the first quarter of fiscal 2017, we commenced a project to assess the potential impact of the new standard on our consolidated financial statements and related disclosures. This project also includes the assessment and enhancement of our internal processes, controls and systems to address the new standard. While we are continuing to assess all potential impacts of ASU 2014-09, we currently believe the most significant impact relates to our accounting for arrangements that include term-based software licenses bundled with other performance obligations including (i) maintenance and support and (ii) professional services. A significant number of our Healthcare and Imaging customer contracts include term-based software licenses bundled with other performance obligations. Under current GAAP, the revenue attributable to these software licenses is recognized ratably over the term of the arrangement because vendor-specific objective evidence ("VSOE") does not exist for the undelivered maintenance and support element as it is not sold separately. Under ASU 2014-09, the requirement to have VSOE for undelivered elements to enable the separation of revenue for the delivered software licenses is eliminated. Accordingly, under the new standard we will be required to recognize term-based software revenue as control is transferred and based upon the amount proportionally allocated to the term-based software license from the contract transaction price. We do not currently expect ASU 2014-09 to have a significant effect on the timing of revenue related to our renewal maintenance, professional services and cloud offerings. Another significant provision under ASU 2014-09 includes the capitalization and amortization of costs associated with obtaining a contract, such as sales commissions. Currently, we expense sales commissions in the period incurred. Under ASU 2014-09, direct and incremental costs to acquire a contract are capitalized and amortized over the pattern of transfer of the goods and services to which the asset relates. While we are continuing to assess the impact of this provision of ASU 2014-09, we likely will be required to capitalize a significant amount of our sales commission costs.

Recently Issued Accounting Standards

In January 2018, the FASB issued ASU 2018-02, "Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("AOCI"), which is effective for fiscal years beginning after December 15, 2018 and interim periods therein, with early adoption permitted. The guidance gives entities the option to reclassify to retained earnings the tax effects resulting from the Tax Cuts and Jobs Act ("TCJA") related to items in AOCI. The new guidance may be applied retrospectively to each period in which the effect of the Act is recognized in the period of adoption. We do not expect the implementation to have a material impact on our consolidated financial statements.

In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments" ("ASU 2016-15"), which is effective for fiscal years beginning after December 15, 2017 and the interim periods therein, with early adoption permitted. The guidance requires cash flows with multiple characteristics to be classified using a three-step process, including (i) determining whether explicit guidance is applicable, (ii) separating each identifiable source or use of cash flows, and (iii) determining the predominant source or use of cash flows when the source or use of cash flows cannot be separately identifiable. The guidance will be applied retrospectively to each period presented. We do not expect the implementation to have a material impact on our consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, "Leases" ("ASU 2016-02"). ASU 2016-02 requires lessees to recognize on the balance sheet a right-of-use asset, representing its right to use the underlying asset for the lease term, and a lease liability for all leases with terms greater than 12 months. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing, and uncertainty of cash flows arising from leases. The standard requires the use of a modified retrospective transition approach, which includes a number of optional practical expedients that entities may elect to apply. ASU 2016-02 is effective for us in the first quarter of fiscal year 2020, and early application is permitted. We are currently evaluating the impact of our pending adoption of ASU 2016-02 on our consolidated financial statements, and we currently expect that most of our operating lease commitments will be subject to the new standard and recognized as operating lease liabilities and right-of-use assets upon our adoption of ASU 2016-02, which will increase our total assets and total liabilities that we report relative to such amounts prior to adoption.

In January 2016, the FASB issued ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities" ("ASU 2016-01"). ASU 2016-01 amends the guidance on the classification and measurement of financial instruments. Although ASU 2016-01 retains many current requirements, it significantly revises accounting related to the classification and measurement of investments in equity securities and the presentation of certain fair value changes for financial liabilities measured at fair value. ASU 2016-01 also amends certain disclosure requirements associated with the fair value of financial instruments and is effective for us in the first quarter of fiscal year 2019. Based on the composition of our investment portfolio, we do not believe the adoption of ASU 2016-01 will have a material impact on our consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers: Topic 606" ("ASU 2014-09"), to supersede nearly all existing revenue recognition guidance under U.S. GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five-step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. ASU 2014-09 permits two methods of adoption: (i) retrospective to each prior reporting period presented; or (ii) retrospective with the cumulative effect of initially applying the guidance recognized at the date of initial application. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers: Deferral of the Effective Date, which deferred the effective date of the new revenue standard for periods beginning after December 15, 2016 to December 15, 2017, with early adoption permitted but not earlier than the original effective date. ASU 2014-09 is effective for us beginning on October 1, 2018 and we plan to adopt ASU 2014-09 using the cumulative catch-up transition method, with a cumulative adjustment to retained earnings as opposed to retrospectively adjusting prior periods.

In the first quarter of fiscal 2017, we commenced a project to assess the potential impact of the new standard on our consolidated financial statements and related disclosures. This project also includes the assessment and enhancement of our internal processes, controls and systems to address the new standard.

While we are continuing to assess all potential impacts of ASU 2014-09, we currently believe the most significant impact relates to our accounting for arrangements that include term-based software licenses bundled with other performance obligations including (i) maintenance and support and (ii) professional services. A significant number of our Healthcare and Imaging customer contracts include term-based software licenses bundled with other performance obligations. Under current GAAP, the revenue attributable to these software licenses is recognized ratably over the term of the arrangement because vendor-specific objective evidence ("VSOE") does not exist for the undelivered maintenance and support element as it is not sold separately. Under ASU 2014-09, the requirement to have VSOE for undelivered elements to enable the separation of revenue for the delivered software licenses is eliminated. Accordingly, under the new standard we will be required to recognize term-based software revenue as control is transferred and based upon the amount proportionally allocated to the term-based software license from the contract transaction price. We do not currently expect ASU 2014-09 to have a significant effect on the timing of revenue related to our renewal maintenance, professional services and cloud offerings.

Another significant provision under ASU 2014-09 includes the capitalization and amortization of costs associated with obtaining a contract, such as sales commissions. Currently, we expense sales commissions in the period incurred. Under ASU 2014-09, direct and incremental costs to acquire a contract are capitalized and amortized over the pattern of transfer of the goods and services to which the asset relates. While we are continuing to assess the impact of this provision of ASU 2014-09, we likely will be required to capitalize a significant amount of our sales commission costs.