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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 | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Derivatives Not Designated as Hedging Instruments |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | $ (13.7) | $ (52.9) | $ (167.7) | $ (34.5)
Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | (2.2) | (2.3) | (4.1) | (2.9)
Gain (Loss) Reclassified from AOCI into Income | 0.0 | (4.3) | (1.0) | (3.8)
Foreign currency contracts | Derivatives Not Designated as Hedging Instruments | Other non-operating income (expense), net |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | 7.8 | (11.0) | 16.7 | (15.8)
Foreign currency contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | 0.2 | (3.1) | 1.2 | (4.5)
Foreign currency contracts | Cash Flow Hedges | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Reclassified from AOCI into Income | 1.3 | (3.9) | 2.1 | (3.1)
Foreign currency contracts | Net Investment Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (loss) recognized in AOCI, net investment hedge | 5.9 | 0.0 | 6.8 | 0.0
Cross-currency contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | 0.0 | 0.3 | (0.1) | 0.4
Cross-currency contracts | Cash Flow Hedges | Interest expense/other operating income, net |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Reclassified from AOCI into Income | 0.0 | 0.3 | (0.3) | 0.5
Interest rate contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | (2.4) | 0.5 | (5.2) | 1.2
Interest rate contracts | Cash Flow Hedges | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Reclassified from AOCI into Income | (1.3) | (0.7) | (2.8) | (1.2)
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | (26.2) | (41.8) | (185.9) | (17.4)
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Revenues |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | 4.6 | (0.2) | 1.8 | (1.5)
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 | $ (0.3) | $ 0.2

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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=84234895&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=84234895&loc=SL5624177-113959 + Details
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