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Derivative Instruments and Hedging Activities - Effects of Derivative Instruments on the Condensed Consolidated Statements of Income and Changes in AOCI (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Derivatives Not Designated as Hedging Instruments |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in Income | $ 109.8 | $ (44.7)
Cash Flow Hedges |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in AOCI | 18.3 | 11.0
Gain (Loss) Reclassified from AOCI into Income | 6.6 | 8.5
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Cost of sales |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in Income | 108.5 | (46.2)
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Revenues |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in Income | 0.1 | 1.6
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Operating and administrative expenses |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in Income | (0.1) | (0.1)
Foreign currency contracts | Derivatives Not Designated as Hedging Instruments | Gains on foreign currency contracts, net |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in Income | 1.3 | 0.0
Foreign currency contracts | Cash Flow Hedges |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in AOCI | 17.2 | 5.4
Foreign currency contracts | Cash Flow Hedges | Cost of sales |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Reclassified from AOCI into Income | 7.9 | 9.1
Cross-currency contracts | Cash Flow Hedges |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in AOCI | (0.1) | 0.0
Cross-currency contracts | Cash Flow Hedges | Interest expense/other operating income, net |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Reclassified from AOCI into Income | (0.3) | 0.0
Interest rate contracts | Cash Flow Hedges |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Recognized in AOCI | 1.2 | 5.6
Interest rate contracts | Cash Flow Hedges | Interest expense |  |
Derivative Instruments, Gain (Loss) |  |
Gain (Loss) Reclassified from AOCI into Income | $ (1.0) | $ (0.6)

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959 + Details
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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