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Affiliate Equity - Summary of Affiliate Recognized and Unrecognized Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Affiliate Equity [Line Items] |  |  |  |  |
Affiliate equity compensation expense | $ 9.5 | $ 9.2 | $ 36.3 | $ 32.2 |
Non-controlling Interests |  |  |  |  |
Affiliate Equity [Line Items] |  |  |  |  |
Non-controlling interests | 6.0 | 6.9 | $ 24.9 | 24.9 |
Unrecognized Affiliate Equity Expense [Abstract] |  |  |  |  |
Remaining Life |  |  | 5 years |  | 6 years
Non-controlling Interests | 115.2 |  | $ 115.2 |  | $ 124.6
Affiliated Entity |  |  |  |  |
Affiliate Equity [Line Items] |  |  |  |  |
Controlling interest | 3.5 | $ 2.3 | 11.4 | $ 7.3 |
Unrecognized Affiliate Equity Expense [Abstract] |  |  |  |  |
Controlling Interest | $ 37.6 |  | $ 37.6 |  | $ 40.9
Remaining Life |  |  | 4 years |  | 4 years

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- Definition Affiliate Equity Compensation Expense, Attributable to Noncontrolling Interest + References No definition available. + Details
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- Definition Affiliate Equity Compensation Expense, Including Portion Attributable to Noncontrolling Interest + References No definition available. + Details
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- Definition [Line Items] for Affiliate Equity [Table] + References No definition available. + Details
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- Definition Affiliate Equity Unrecognized Compensation Expense, Attributable to Noncontrolling Interest + References No definition available. + Details
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- Definition Affiliate Equity, Unrecognized Compensation Expense, Remaining Life + References No definition available. + Details
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- Definition Represents the compensation expenses related to Affiliate equity. + References No definition available. + Details
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- Definition Unrecognized Affiliate Equity Expense [Abstract] + References No definition available. + Details
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- Definition Unrecognized Compensation Expenses Related to Affiliate Equity Attributable to Controlling Interest + References No definition available. + Details
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- Details
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- Details
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