Unaudited Interim Information (Policies)	9 Months Ended
Unaudited Interim Information (Policies)	Jun. 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Recently Issued Accounting Pronouncements	In April 2014, the Financial Accounting Standards Board (“FASB”) issued new guidance intended to change the criteria for reporting discontinued operations while enhancing disclosures for discontinued operations, which changes the criteria and requires additional disclosures for reporting discontinued operations. The guidance is effective for all disposals of components of an entity that occur within annual periods beginning on or after December 15, 2014, and interim periods within annual periods beginning on or after December 15, 2015. We do not expect that our adoption of this guidance will have a material impact on our financial statements or disclosures in our financial statements. In May 2014, the FASB issued new guidance intended to change the criteria for recognition of revenue. The core principle of the guidance is that an entity should 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 guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements. In June 2014, the FASB issued amended guidance on the accounting for certain share-based employee compensation awards. The amended guidance applies to share-based employee compensation awards that include a performance target that affects vesting when the performance target can be achieved after the requisite service period. These targets are to be treated as a performance condition. As such, the performance target should not be reflected in estimating the grant-date fair value of the award and compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. We do not expect that our adoption of this guidance will have a material impact on our financial statements or disclosures in our financial statements. In April 2015, the FASB issued new guidance intended to simplify the presentation of debt issuance costs. This new guidance requires that debt issuance costs related to outstanding debt be netted against that liability in the balance sheet, consistent with the treatment of debt discounts. This guidance is effective for fiscal years and interim periods beginning after December 15, 2015 and early adoption is permitted. We are currently evaluating what impact the adoption of this guidance will have on our financial statements or disclosures in our financial statements.
Fair Value Measurement	We have certain assets and liabilities that are required to be measured and disclosed at fair value. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy prioritizes inputs to valuation techniques used to measure fair value into three levels. Priority is given to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, takes into account the market for our financial assets and liabilities, the associated credit risk and other considerations. We have classified and disclosed fair value measurements using the following levels of the fair value hierarchy: Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. Level 3: Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).
Income Taxes	We record estimated accrued interest and penalties related to uncertain tax positions as income tax expense.

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.