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Other Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Sep. 30, 2017
--- | --- | ---
Other Liabilities [Line Items] |  |
Net accrued retirement benefits, less amounts recognized within accrued liabilities | $ 92,075 | $ 52,211
Noncurrent portion of deferred income from JV formation | 237,724 | 236,896
Total unrecognized tax benefits, net of offsetting adjustments | 9,910 | 20,949
Noncurrent income taxes payable | 23,920 | 0
Acquired unfavorable contracts | 591 | 2,076
Deferred economic incentives | 13,422 | 14,574
Other | 12,363 | 14,165
Other liabilities | 416,498 | 344,798
Loss Reserve On Contractual Lease Commitments [Member] |  |
Other Liabilities [Line Items] |  |
Loss reserve, noncurrent portion | 2,966 | $ 3,927
Cross Currency Interest Rate Contract [Member] |  |
Other Liabilities [Line Items] |  |
Derivative liability | $ 23,527 |

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611 + Details
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