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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 | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Derivatives Not Designated as Hedging Instruments |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | $ (51.0) | $ 105.4 | $ (218.7) | $ 70.9
Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | (2.2) | 5.2 | (6.3) | 2.3
Gain (Loss) Reclassified from AOCI into Income | (0.9) | (0.4) | (1.9) | (4.2)
Foreign currency contracts | Derivatives Not Designated as Hedging Instruments | Other non-operating income, net |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | 0.4 | 25.6 | 17.1 | 9.8
Foreign currency contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | 0.0 | 3.9 | 1.2 | (0.6)
Foreign currency contracts | Cash Flow Hedges | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Reclassified from AOCI into Income | 0.2 | 0.0 | 2.3 | (3.1)
Foreign currency contracts | Net Investment Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Net Investment Hedges: | 0.4 | 0.0 | 7.2 | 0.0
Cross-currency contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | 0.0 | 0.5 | (0.1) | 0.9
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) | 0.8
Interest rate contracts | Cash Flow Hedges |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in AOCI | (2.2) | 0.8 | (7.4) | 2.0
Interest rate contracts | Cash Flow Hedges | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Reclassified from AOCI into Income | (1.1) | (0.7) | (3.9) | (1.9)
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Cost of sales |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | (58.6) | 80.9 | (244.5) | 63.5
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Revenues |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income | $ 7.2 | $ (1.1) | 9.0 | (2.6)
Commodity contracts | Derivatives Not Designated as Hedging Instruments | Operating and administrative expenses |  |  |  |
Derivative Instruments, Gain (Loss) |  |  |  |
Gain (Loss) Recognized in Income |  |  | $ (0.3) | $ 0.2

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