The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Cash and Cash Equivalents [Line Items]
Cash at bank and on hand	$ 769.4	$ 524.7
Total cash and cash equivalents1	769.4	524.7	$ 886.8	$ 515.0
Australia
Disclosure of Cash and Cash Equivalents [Line Items]
Cash deposit	28.2	0.0
Peru
Disclosure of Cash and Cash Equivalents [Line Items]
Cash deposit	$ 10.0	$ 0.0