| **Investment in and Advances to Unconsolidated Affiliates - Affiliate Income Statement (Details) - USD ($) $ in Millions** | 3 Months Ended | 6 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------|----------------|----------------|
||
| **Investments in and Advances to Affiliates [Line Items]**                                                                 |           |           |   |   |
| Net revenue                                                                                                                | $ 582.5        | $ 515.1        | $ 946.6 | $ 839.4 |
| Net income                                                                                                                 |           |           | 381.4 | 144.4 |
| Equity Method Investment, Nonconsolidated Investee or Group of Investees                                                   |           |           |   |   |
| **Investments in and Advances to Affiliates [Line Items]**                                                                 |           |           |   |   |
| Net revenue                                                                                                                | 214.6          | 197.9          | 391.8 | 336.6 |
| Operating and SG&A expense                                                                                             | 130.7          | 109.8          | 248.9 | 195.4 |
| Depreciation and amortization                                                                                              | 6.3            | 4.4            | 11.6 | 8.7 |
| Total operating expense                                                                                                    | 137.0          | 114.2          | 260.5 | 204.1 |
| Operating income                                                                                                           | 77.6           | 83.7           | 131.3 | 132.5 |
| Interest and other, net                                                                                                    | (7.3)          | (19.7)         | (3.2) | (24.3) |
| Net income                                                                                                                 | $ 70.3         | $ 64.0         | $ 128.1 | $ 108.2 |

| X                                                                                                                                                                                                                                                                                                                                       |
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| - Definition
The amount of depreciation and amortization expenses, reported by an equity method investment of the entity.
+ References
No definition available.
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| - Definition
The amount of interest expense reported by an equity method investment of the entity.
+ References
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| - Definition
The amount of operating income or loss reported by an equity method investment of the entity.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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No definition available.
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| - Definition
The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.
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| - Definition
Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).
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