Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 599	$ (136)
Other Comprehensive (Loss) Income, Net of Tax
Foreign currency translation adjustments	(35)	(36)
Defined benefit pension and postretirement plans	15	17
Cash flow hedges	1	1
Other Comprehensive Loss, Net of Tax	(18)	(17)
Comprehensive Income (Loss)	$ 581	$ (154)

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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