Debt - Guarantees (Details) - Ravenhall	Sep. 30, 2023 AUD ($) Guarantee	Sep. 30, 2023 USD ($) Guarantee
Debt Instrument [Line Items]
Number of letters of guarantee outstanding under separate international facilities relating to performance guarantees | Guarantee	5	5
Letters of credit outstanding relating to performance guarantees | $		$ 8,600,000
Letter of credit | Revolver
Debt Instrument [Line Items]
Maximum exposure, undiscounted	$ 53,000,000	$ 34,100,000