Affiliated Equity - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Affiliate Equity [Line Items]
Distributions paid to affiliate partners	$ 276.6	$ 293.6
Payments to acquire interest in affiliates	85.2	104.3
Issuance of interest in affiliates	10.4	$ 6.3
Other assets
Affiliate Equity [Line Items]
Due from affiliates	14.8		$ 16.2
Other liabilities
Affiliate Equity [Line Items]
Due to affiliates	$ 36.8		$ 36.2

[Line Items] for Affiliate Equity [Table]

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Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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