Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Asbestos - Narrative (Details)

v3.22.1
Asbestos - Narrative (Details)
$ in Millions, $ in Millions
12 Months Ended 51 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2023
AUD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
AUD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2021
AUD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2020
AUD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
AUD ($)
Mar. 31, 2022
AUD ($)
Schedule Of Asbestos Claims [Line Items]                      
Percent of claims above actuarial expectations     1.00% 1.00%              
Percent of claims compared to prior corresponding period     3.00% 3.00%              
Percent of net cash outflows below actuarial expectations     1.00% 1.00%              
Cash paid to AICF     $ 248.5   $ 153.3   $ 108.9   $ 715.9 $ 979.1  
Secured standby loan facility maximum borrowing capacity     239.4           $ 239.4   $ 320.0
Restricted Cash and Investments                      
Schedule Of Asbestos Claims [Line Items]                      
Payment received in accordance with AFFA     $ 248.5 $ 328.2 $ 153.3 $ 220.9 $ 108.9 $ 156.7      
Scenario, Forecast | AICF Funding                      
Schedule Of Asbestos Claims [Line Items]                      
Cash paid to AICF $ 117.8 $ 157.5                  
Central Estimate – Discounted and Inflated                      
Schedule Of Asbestos Claims [Line Items]                      
Discounted actuarial estimate, potential period shift     2 years 2 years              
Discounted actuarial estimate, potential percent increase     21.00%           21.00%   21.00%