Impairment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Impairment [Abstract]
Impairment	$ 96.5	$ 0.0	$ 96.5	$ 0.0
Recoverable amount of asset or cash-generating unit	$ 449.0		$ 449.0
Sensitivity Analysis For Discount Rate			1.00%
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input, assets			$ 41.0
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, assets			$ 41.0
Actuarial assumption of discount rates	19.00%		19.00%
Sensitivity Analysis for Capital Costs			$ 50.0
Increase (decrease) in fair value measurement due to reasonably possible increase in unobservable input - WACC			113.0
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input - WACC			$ 131.0

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

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The amount of impairment loss or reversal of impairment loss recognised in profit or loss. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss]

+ References

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The amount of increase (decrease) in the fair value measurement of assets due to a reasonably possible decrease in an unobservable input.

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The amount of increase (decrease) in the fair value measurement of assets due to a reasonably possible increase in an unobservable input.

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The higher of an asset’s (or cash-generating unit’s) fair value less costs of disposal and its value in use. [Refer: Cash-generating units [member]]

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Impairment [Abstract]

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Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input - WACC

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Sensitivity Analysis for Capital Costs

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Sensitivity Analysis For Discount Rate

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