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Revenue (Schedule of Contract Liability) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
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Contract With Customer Liability [Line Items] |  |
Current contract liabilities | $ 56,791 | $ 33,748
Noncurrent contract liabilities | 424,609 | 414,657
Deferred Revenue from Material Rights from JV Formation [Member] |  |
Contract With Customer Liability [Line Items] |  |
Current contract liabilities | 6,580 | 6,147
Noncurrent contract liabilities | 232,164 | 233,997
Deferred Revenue From Advance Invoicing And/Or Prepayments From Customers [Member] |  |
Contract With Customer Liability [Line Items] |  |
Current contract liabilities | 23,706 | 6,868
Noncurrent contract liabilities | 6,437 | 2,196
Liability Related To Customer Supplied Inventory [Member] |  |
Contract With Customer Liability [Line Items] |  |
Current contract liabilities | 20,563 | 14,543
Deferred Revenue From Material Rights Related To Engineering And Development Funding [Member] |  |
Contract With Customer Liability [Line Items] |  |
Current contract liabilities | 5,942 | 6,190
Noncurrent contract liabilities | $ 186,008 | $ 178,464

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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