The value of definitive agreement for acquisition of assets.

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The percentage of ownership of common stock or equity participation in the investee, attributable to noncontrolling party, accounted for under the equity method of accounting.

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Noncash Adjustment, Reduction Of Accrued Obligation Under Joint Venture Agreement

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Project Assets Agreement, Term

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Supply Agreement, Oxygen And Nitrogen

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No definition available.

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Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Equity Affiliates (Narrative) (Details) - USD ($) $ in Millions				3 Months Ended	12 Months Ended
	Jan. 19, 2023	Oct. 27, 2021	Sep. 27, 2021	Dec. 31, 2022	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2015	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investment in net assets of and advances to equity affiliates						$ 4,617.8	$ 3,353.8
Dividends and other distributions received from equity affiliates						344.3	285.1	$ 157.3
Goodwill associated with affiliate companies accounted for by equity method						$ 41.3	44.6
Equity method investment impairment charge							14.8
Jazan Integrated Gasification and Power Company ("JIGPC")
Schedule of Equity Method Investments [Line Items]
Payments for equity investment	$ 908.0	$ 1,600.0
Ownership interest percentage		55.00%				55.00%
Investment balance						$ 2,862.2
Jazan Integrated Gasification and Power Company ("JIGPC") \| Non-controlling Interests
Schedule of Equity Method Investments [Line Items]
Payments for equity investment	73.0	$ 130.0
Ownership percentage attributable to noncontrolling partner		4.00%				4.00%
Jazan Integrated Gasification and Power Company ("JIGPC") \| Forecast \| Subsequent event
Schedule of Equity Method Investments [Line Items]
Payments for equity investment					$ 115.0
Jazan Gas Project Company ("JGPC")
Schedule of Equity Method Investments [Line Items]
Ownership interest percentage						26.00%
Jazan Integrated Gasification and Power Company ("JIGPC") \| Aramco
Schedule of Equity Method Investments [Line Items]
Definitive agreement for acquisition of assets, value			$ 12,000.0
Acquisition of assets	$ 4,150.0	$ 7,390.0
Term of agreement to commission, operate, and maintain the project assets			25 years
Jazan Integrated Gasification and Power Company ("JIGPC") \| Aramco \| Forecast \| Subsequent event
Schedule of Equity Method Investments [Line Items]
Acquisition of assets					$ 525.0
Jazan Gas Project Company ("JGPC") \| Aramco
Schedule of Equity Method Investments [Line Items]
Term of oxygen and nitrogen supply agreement									20 years
Obligation for equity contributions based on share of advances received by joint venture under bridge loan
Schedule of Equity Method Investments [Line Items]
Obligation for future contribution to equity affiliate							$ 0.0			$ 0.0
Noncash adjustment for reduction of contractual obligation				$ 94.4