| Asbestos - Schedule of Time Deposits (Details) $ in Millions | Mar. 31, 2023  AUD ($) | 
|---|---|
| Time Deposits, 13 July 2023 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 4.74% | 
| Time Deposits | $ 70.0 | 
| Time Deposits, 13 October 2023 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 4.74% | 
| Time Deposits | $ 40.0 | 
| Time Deposits, 13 January 2024 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 4.74% | 
| Time Deposits | $ 39.0 | 
| Time Deposits, 13 February 2024 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 4.74% | 
| Time Deposits | $ 1.0 | 
| Time Deposits, 5 April 2024 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 2.75% | 
| Time Deposits | $ 54.0 | 
| Time Deposits, 25 January 2024 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 1.41% | 
| Time Deposits | $ 30.0 | 
| Time Deposits, 6 October 2023 Maturity Date | |
| Net Investment Income [Line Items] | |
| Interest Rate | 0.60% | 
| Time Deposits | $ 30.0 | 
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate. No definition available. 
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- Definition Amount of time deposit liabilities, including certificates of deposit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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