Related Party Transactions - Construction Management Firm and CCI - Narrative (Details) - CCI - Equipment - Immediate Family Member of Management - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Payments, net of rebates, related party	$ 8.0	$ 1.8	$ 18.6	$ 3.2
Payables, related party	$ 3.4		$ 3.4		$ 4.2

Amount for accounts payable to related parties.

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