Equity and Noncontrolling Interests Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Accumulated other comprehensive income, end of period	$ 418,000,000		$ 458,000,000		$ 649,000,000
Realized and unrealized gains (losses) on derivatives
Current period changes in fair value	(5,000,000)		39,000,000		(47,000,000)
Foreign Currency Translation
Foreign currency translation adjustments
Balance at beginning of period	413,000,000		634,000,000		743,000,000
Aggregate adjustment for the period	(21,000,000)		(221,000,000)		(109,000,000)
Balance at end of period	392,000,000		413,000,000		634,000,000
Aggregate adjustment for the period, tax	19,000,000		(15,000,000)		(3,000,000)
Realized And Unrealized Gains Losses On Derivatives
Realized and unrealized gains (losses) on derivatives
Balance at beginning of period	12,000,000		(27,000,000)		20,000,000
Current period changes in fair value	(2,000,000)		14,000,000		(28,000,000)
Reclassification to income	(3,000,000)	[1]	25,000,000	[1]	(19,000,000)	[1]
Balance at end of period	7,000,000		12,000,000		(27,000,000)
Current period changes in fair value, tax	(2,000,000)		9,000,000		(17,000,000)
Reclassification to income, tax	(2,000,000)		17,000,000		(13,000,000)
Unrealized Gain Loss On Marketable Common Stock
Unrealized gains (losses) on marketable common stock
Balance at beginning of period	5,000,000		6,000,000		3,000,000
Current period changes in fair value	2,000,000		(15,000,000)		3,000,000
Reclassifications to income	0	[2]	14,000,000	[2]	0	[2]
Balance at end of period	7,000,000		5,000,000		6,000,000
Current period changes in fair value, tax	0		(3,000,000)		0
Reclassification to income, tax	0		0		0
Pension And Other Postretirement Benefit Plans Assets
Pension and postretirement plans
Balance at beginning of period	28,000,000		36,000,000		32,000,000
Reclassification to income	(18,000,000)	[3]	(10,000,000)	[3]	(2,000,000)	[3]
Other changes	2,000,000		2,000,000		6,000,000
Balance at end of period	12,000,000		28,000,000		36,000,000
Reclassification to income, tax	(9,000,000)		(7,000,000)		(1,000,000)
Other changes, tax	0		0		0
Cost of Sales | Pension And Other Postretirement Benefit Plans Assets
Pension and postretirement plans
Reclassification to income					(8,000,000)	[3]
Selling, general and administrative | Pension And Other Postretirement Benefit Plans Assets
Pension and postretirement plans
Reclassification to income					$ 6,000,000	[3]

[1] Refer to Note 10, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items on the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives.

[2] Refer to Note 11, "Fair Value Measurements," of the notes to consolidated financial statements for disclosure of the line item on the consolidated statements of income affected by reclassifications from AOCI into income related to marketable common stock.

[3] Refer to Note 15, "Retirement Plans," of the notes to consolidated financial statements for disclosure of the components of the Company's net periodic benefit costs associated with its defined benefit pension and postretirement plans. For the year ended September 30, 2013, the income reclassified from AOCI into income for pension and postretirement plans was split approximately evenly between cost of sales and selling, general and administrative expenses on the consolidated statement of income. For the year ended September 30, 2012, the reclassified income was primarily recorded in cost of sales. For the year ended September 30, 2011, approximately $8 million of reclassified income was recorded in cost of sales, and approximately $6 million of reclassified expense was recorded in selling, general and administrative expenses.