Accounting Changes (Policies)	9 Months Ended
Accounting Changes (Policies)	Jun. 30, 2016
Accounting Changes and Error Corrections [Abstract]
New Accounting Principle Adopted	New Accounting Principle Adopted In November 2015, the Financial Accounting Standards Board ("FASB") issued amended guidance that requires entities to present deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. Early adoption is permitted under the amendments. The Company has retrospectively adopted the guidance effective October 1, 2015 and as such, the condensed consolidated balance sheet as of September 30, 2015 reflects the reclassification of current deferred tax assets of $387 million as noncurrent amounts, after giving effect to jurisdictional netting requirements. New Accounting Principle Not Yet Adopted In March 2016, the FASB issued guidance which amends certain aspects of the accounting for share-based compensation awards to employees. The aspects of share-based compensation accounting which are affected by the guidance include the timing of recognition for award-related income tax effects and the classification of awards as either equity or liabilities on the balance sheet. The amended guidance is effective for the Company on October 1, 2017 and early adoption is permitted. The Company is currently evaluating the impact that the guidance will have on its consolidated financial statements. In February 2016, the FASB issued a new lease accounting standard which requires lessees to recognize lease assets and lease liabilities on the balance sheet. The new standard also requires expanded disclosures regarding leasing arrangements. The Company is currently evaluating the impact that this new lease accounting standard will have on its consolidated financial statements upon its adoption of the standard on October 1, 2019. In May 2014, the FASB issued a new revenue recognition standard. Under this standard, revenue will be recognized upon the transfer of goods or services to customers and the amount of revenue recognized will reflect the consideration to which a reporting entity expects to be entitled in exchange for those goods or services. The Company is currently evaluating the impact that this new revenue recognition standard will have on its consolidated financial statements and the Company currently intends to adopt the standard on October 1, 2018, as is allowed under the FASB's July 2015 amendment which deferred the effective date for this standard.
Derivatives	The Company’s policy is to manage interest cost using a mix of fixed and variable rate debt. The Company periodically uses interest rate swaps to manage such exposures. Under these interest rate swaps, the Company exchanges, at specified intervals, the difference between fixed and floating interest amounts calculated by reference to an agreed-upon notional principal amount. These swaps are designated as either fair value or cash flow hedges. For interest rate swaps designated as fair value hedges (i.e., hedges against the exposure to changes in the fair value of an asset or a liability or an identified portion thereof that is attributable to a particular risk), changes in the fair value of the interest rate swaps offset changes in the fair value of the fixed rate debt due to changes in market interest rates. Changes in the fair value of the interest rate swaps designated as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows that is attributable to a particular risk) are offset by amounts recorded in Other comprehensive income (loss). If interest rate derivatives designated as cash flow hedges are terminated, the balance in Accumulated other comprehensive income (loss) attributable to those derivatives is reclassified into earnings over the remaining life of the hedged debt. The Company uses derivative instruments to mitigate certain exposures. The effects these derivative instruments and hedged items have on financial position, financial performance, and cash flows are provided below. Hedges of the transactional foreign exchange exposures resulting primarily from intercompany payables and receivables are undesignated hedges. As such, the gains or losses on these instruments are recognized immediately in income. The offset of these gains or losses against the gains and losses on the underlying hedged items, as well as the hedging costs associated with the derivative instruments, is recognized in Other income (expense), net.
Commitments and Contingencies	Given the uncertain nature of litigation generally, the Company is not able in all cases to estimate the amount or range of loss that could result from an unfavorable outcome of the litigation to which the Company is a party. In accordance with U.S. generally accepted accounting principles, the Company establishes accruals to the extent probable future losses are estimable (in the case of environmental matters, without considering possible third-party recoveries). In view of the uncertainties discussed below, the Company could incur charges in excess of any currently established accruals and, to the extent available, liability insurance. In the opinion of management, any such future charges, individually or in the aggregate, could have a material adverse effect on the Company’s consolidated results of operations and consolidated cash flows.