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Note 5,Debt and Financing Arrangements Schedule of Long Term Debt (Details) $ in Millions, € in Billions	3 Months Ended		9 Months Ended
	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2017 EUR (€) Rate	Jun. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Debt Instrument [Line Items]
Repayments of Debt	$ 200	$ 100
Capital Lease Obligations				$ 1	$ 2
Debt Issuance Costs, Net				(40)	(43)
Gross Long Term Debt				3,393	3,480
Current Portion of Long Term Debt				0	38
Net Long Term Debt				3,393	3,442
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt				1,200	1,500
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt				4	2
United States of America, Dollars | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 900	900
Debt Instrument, Interest Rate, Stated Percentage			4.875%	4.875%
Euro Member Countries, Euro | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt			€ 1.0	$ 1,140	1,119
Debt Instrument, Interest Rate, Stated Percentage			3.50%	3.50%
Minimum [Member]
Debt Instrument [Line Items]
Drawn Portion Credit Facilities | Rate			1.25%
Net Leverage Ratio Required by Debt Covenant | Rate			0.15%
Maximum [Member]
Debt Instrument [Line Items]
Drawn Portion Credit Facilities			2.25%
Net Leverage Ratio Required by Debt Covenant | Rate			0.35%
European Union [Member] | Euro Member Countries, Euro | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 188	$ 0
Consolidated Entities [Member] | European Union [Member] | Euro Member Countries, Euro | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt				165
Euribor Future [Member] | Consolidated Entities [Member] | European Union [Member] | Euro Member Countries, Euro | Unsecured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 0

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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