Investments (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended		9 Months Ended
	Oct. 18, 2023	Jun. 01, 2021	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Schedule of Investments [Line Items]
Income (Loss) from Equity Method Investments			$ 286,878	$ 551,051	$ 467,378	$ 947,239
Net sales			1,430,385	2,370,190	2,791,121	4,950,442
Gross profit			(10,578)	558,487	28,360	1,835,027
Net (loss) income			(176,594)	676,439	(159,947)	1,953,142
Equity Securities, Purchases						121,900
Mark-to-market (loss) gain on public equity securities			(17,800)	15,000	(27,200)	60,800
Proceeds from sale of equity securities					81,500
Equity securities realized loss					33,700
Fine Chemistry Services
Schedule of Investments [Line Items]
Preferred Stock, Value, Outstanding		$ 270,000	297,800		297,800		$ 289,300
Preferred Stock, Dividend Rate, Percentage		12.00%
Preferred equity redemption original value threshold		200.00%
Significant Unconsolidated Joint Ventures
Schedule of Investments [Line Items]
Net sales			541,982	2,319,020	731,991	4,278,318
Gross profit			391,610	2,244,236	541,592	4,145,936
Income before income taxes			326,322	2,151,879	420,952	3,936,029
Net (loss) income			226,689	1,506,326	293,100	2,755,228
Windfield Holdings
Schedule of Investments [Line Items]
Carrying value of unconsolidated investment			626,700		626,700		712,000
Windfield Holdings
Schedule of Investments [Line Items]
Income (Loss) from Equity Method Investments			$ 278,995	545,943	$ 451,674	933,242
Equity method investment, ownership percentage			49.00%		49.00%
Windfield Holdings | Windfield Holdings
Schedule of Investments [Line Items]
Equity method investment, ownership percentage			49.00%		49.00%
Other Joint Ventures
Schedule of Investments [Line Items]
Income (Loss) from Equity Method Investments			$ 7,883	$ 5,108	$ 15,704	$ 13,997
Mineral Resources Limited
Schedule of Investments [Line Items]
Capital costs committed							380,000
Capital costs committed, consideration							$ 180,000
Kemerton Plant
Schedule of Investments [Line Items]
Ownership percentage purchased	40.00%
Mineral Resources Limited Wodgina Project
Schedule of Investments [Line Items]
Ownership percentage	50.00%