Restructuring and Related Activities (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off		$ 292,315	$ 0	$ 309,515	$ 0
Restructuring and other charges		2,525	7,439	18,861	7,439
Subsequent Event | Minimum
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off	$ 900,000
Subsequent Event | Maximum
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off	1,100,000
Subsequent Event | Kemerton Train 3 | Minimum
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off	725,000
Subsequent Event | Kemerton Train 3 | Maximum
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off	$ 800,000
Operating Income (Loss)
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off		292,300		309,500
Other income, net
Restructuring Cost and Reserve [Line Items]
Capital project assets write-off		2,600		5,400
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 2,500	$ 7,400	$ 18,900	$ 7,400