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Derivative Instruments and Hedging Activities - Effects of Derivative Instruments on Condensed Consolidated Statements of Income and Changes in AOCI and Noncontrolling Interest (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Not Designated as Hedging Instruments |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Gain or (loss) recognized in income | $ (36.3) | $ 8.9 | $ 0.8
Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | 66.1 | 21.7 | (135.3)
Derivative instruments gain loss reclassified from accumulated other comprehensive income and noncontrolling interest into income | 47.3 | (63.8) | (70.8)
Commodity Contracts | Not Designated as Hedging Instruments | Cost of Sales |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Gain or (loss) recognized in income | (36.3) | 9.3 | 0.1
Commodity Contracts | Not Designated as Hedging Instruments | Operating and Administrative Expenses/Other Income |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Gain or (loss) recognized in income | 0 | 0 | 0.2
Commodity Contracts | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | 50.8 | 8.3 | (98.0)
Commodity Contracts | Cash Flow Hedges | Cost of Sales |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss reclassified from accumulated other comprehensive income and noncontrolling interest into income | 67.0 | (49.5) | (61.4)
Foreign Currency Contracts | Not Designated as Hedging Instruments | Other income, net |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Gain or (loss) recognized in income | 0 | (0.4) | 0.5
Foreign Currency Contracts | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | 15.3 | (8.3) | (0.5)
Foreign Currency Contracts | Cash Flow Hedges | Cost of Sales |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss reclassified from accumulated other comprehensive income and noncontrolling interest into income | (3.7) | (0.1) | 2.1
Foreign Currency Contracts | Net Investment Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | 0 | 0 | 0.6
Cross Currency Contracts | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | 3.1 | (1.2) | 0
Cross Currency Contracts | Cash Flow Hedges | Interest Expense/Other Income |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss reclassified from accumulated other comprehensive income and noncontrolling interest into income | (0.1) | 0 | 0
Interest Rate Contracts | Cash Flow Hedges |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss recognized in accumulated other comprehensive income and noncontrolling interests | (3.1) | 22.9 | (36.8)
Interest Rate Contracts | Cash Flow Hedges | Interest expense/other income, net [Member] |  |  |
Derivative Instruments, Gain (Loss) |  |  |
Derivative instruments gain loss reclassified from accumulated other comprehensive income and noncontrolling interest into income | $ (15.9) | $ (14.2) | $ (11.5)

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- Definition Derivative instruments gain loss recognized in other comprehensive income and noncontrolling interests effective portion. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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