Trade and Other Receivables (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade and other receivables, gross	$ 913,600,000	$ 186,500,000
Loans receivable	39,600,000	23,400,000
Trade and Other Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	11,500,000	8,000,000
Non-current Loans Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	28,100,000	15,400,000
Leasehold Improvements | Other Current Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade and other receivables, gross	$ 30,700,000	$ 0
Financing Receivable | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of financing lending arrangement	1 year
Financing Receivable | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of financing lending arrangement	4 years