Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of period	$ 719.8	$ 728.2
Liabilities settled or disposed	(51.7)	(72.4)
Accretion expense	56.2	54.9
Revisions to estimates	25.7	9.1
Balance at end of period	750.0	719.8
Less: Current portion (included in “Accounts payable and accrued expenses”)	84.2	65.0
Asset retirement obligations	665.8	654.8
Balance at end of period — active locations	557.9	511.8
Balance at end of period — closed or inactive locations	192.1	208.0
Surety bonds and bank guarantees outstanding to secure reclamation obligations or activities	1,250.1	1,294.7
Letters of credit in support of reclamation obligations or activities	$ 437.8	$ 323.0