Summary of Significant Accounting Policies - Schedule of Spot Trades (Details) - Spot Trade - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Accounts Receivable
Assets:
Gross	$ 2,337.7	$ 521.5
Offset on the Balance Sheet	(2,235.1)	(478.2)
Net	102.6	43.3
Accounts Payable
Liabilities:
Gross Liabilities	2,291.6	527.5
Offset on the Balance Sheet	(2,235.1)	(478.2)
Net	$ 56.5	$ 49.3

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