Changes in Accounting Principles	12 Months Ended
Sep. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Changes In Accounting Principles	CHANGES IN ACCOUNTING PRINCIPLES In January 2017, the FASB issued guidance which removes step 2 from the goodwill impairment test. As a result, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting units' fair value. The guidance is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, our fiscal 2021. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017, and the prospective transition method should be applied. We adopted this guidance, prospectively, in the third quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements. In October 2016, the FASB issued guidance on how a reporting entity, that is the single decision maker of a variable interest entity ("VIE"), should treat indirect interests in the entity held through related parties that are under common control with the reporting entity, when determining whether it is the primary beneficiary of that VIE. This guidance is effective for annual reporting periods and interim periods within those annual reporting periods, beginning after December 15, 2016, our fiscal 2018. We were required to adopt this guidance at the same time that we adopted the amendments in ASU 2015-02; therefore, we early adopted this guidance, retrospectively, in the first quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements. In April 2015, the FASB issued guidance on the recognition of fees paid by a customer for cloud computing arrangements. The guidance clarifies that if a cloud computing arrangement includes a software license, the customer should account for the software license consistent with the acquisition of other software licenses. If the arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance is effective for annual reporting periods and interim periods within those annual reporting periods beginning after December 15, 2015, our fiscal 2017, and should be applied prospectively or retrospectively. We adopted this guidance, prospectively, in the first quarter of fiscal 2017. As a result, prior period balances were not retrospectively adjusted. The adoption did not have a material impact on our consolidated financial statements. In February 2015, the FASB issued guidance changing the analysis procedures that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. All legal entities are subject to reevaluation under the revised consolidation model. The new guidance affects the following areas: (1) limited partnerships and similar legal entities, (2) evaluating fees paid to a decision maker or a service provider as a variable interest, (3) the effect of fee arrangements on the primary beneficiary determination, (4) the effect of related parties on the primary beneficiary determination, and (5) certain investment funds. This guidance is effective for annual reporting periods and interim periods within those annual reporting periods beginning after December 15, 2015, our fiscal 2017. We adopted this guidance, retrospectively, in the first quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements.

CHANGES IN ACCOUNTING PRINCIPLES

In January 2017, the FASB issued guidance which removes step 2 from the goodwill impairment test. As a result, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting units' fair value. The guidance is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019, our fiscal 2021. Early adoption is permitted for annual or interim goodwill impairment tests performed on testing dates after January 1, 2017, and the prospective transition method should be applied. We adopted this guidance, prospectively, in the third quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements.

In October 2016, the FASB issued guidance on how a reporting entity, that is the single decision maker of a variable interest entity ("VIE"), should treat indirect interests in the entity held through related parties that are under common control with the reporting entity, when determining whether it is the primary beneficiary of that VIE. This guidance is effective for annual reporting periods and interim periods within those annual reporting periods, beginning after December 15, 2016, our fiscal 2018. We were required to adopt this guidance at the same time that we adopted the amendments in ASU 2015-02; therefore, we early adopted this guidance, retrospectively, in the first quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements.

In April 2015, the FASB issued guidance on the recognition of fees paid by a customer for cloud computing arrangements. The guidance clarifies that if a cloud computing arrangement includes a software license, the customer should account for the software license consistent with the acquisition of other software licenses. If the arrangement does not include a software license, the customer should account for the arrangement as a service contract. The guidance is effective for annual reporting periods and interim periods within those annual reporting periods beginning after December 15, 2015, our fiscal 2017, and should be applied prospectively or retrospectively. We adopted this guidance, prospectively, in the first quarter of fiscal 2017. As a result, prior period balances were not retrospectively adjusted. The adoption did not have a material impact on our consolidated financial statements.

In February 2015, the FASB issued guidance changing the analysis procedures that a reporting entity must perform to determine whether it should consolidate certain types of legal entities. All legal entities are subject to reevaluation under the revised consolidation model. The new guidance affects the following areas: (1) limited partnerships and similar legal entities, (2) evaluating fees paid to a decision maker or a service provider as a variable interest, (3) the effect of fee arrangements on the primary beneficiary determination, (4) the effect of related parties on the primary beneficiary determination, and (5) certain investment funds. This guidance is effective for annual reporting periods and interim periods within those annual reporting periods beginning after December 15, 2015, our fiscal 2017. We adopted this guidance, retrospectively, in the first quarter of fiscal 2017. The adoption did not have a material impact on our consolidated financial statements.