Equity Method Investments - Schedule of Equity Method Investments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 AUD ($)
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	$ 34,100,000	$ 62,200,000
(Income) loss from equity affiliates	(131,200,000)	(82,100,000)	$ 60,100,000
Advances to related parties	(1,500,000)	(500,000)	(23,200,000)
Equity method investment related to Middlemount
Schedule of Equity Method Investments [Line Items]
Advances to related parties	168,400,000	43,500,000	0
Revolving loan limit				$ 50
Equity method investment related to Middlemount
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	27,100,000	62,200,000
(Income) loss from equity affiliates	(135,100,000)	(82,100,000)	60,100,000
Other equity method investments
Schedule of Equity Method Investments [Line Items]
Equity Method Investments	7,000,000.0	0
(Income) loss from equity affiliates	$ 3,900,000	$ 0	$ 0