| **Investments 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                                                                                                                 | $ 768.5        |           | $ 582.5 |   | $ 1,328.0 | $ 946.6 |
| Operating and SG&A expense                                                                                              | 48.1           |           | 38.4 |   | 100.4 | 74.3 |
| Operating income                                                                                                            | 225.6          |           | 199.7 |   | 345.5 | 247.1 |
| Interest and other, net                                                                                                     | (65.2)         |           | (35.1) |   | (129.9) | (56.4) |
| Net income                                                                                                                  | 143.0          | $ 155.7        | 339.3 | $ 42.1 | 298.7 | 381.4 |
| Equity Method Investment, Nonconsolidated Investee or Group of Investees                                                    |           |           |   |   |   |   |
| **Investments in and Advances to Affiliates [Line Items]**                                                                  |           |           |   |   |   |   |
| Net revenue                                                                                                                 | 218.7          |           | 214.6 |   | 439.3 | 391.8 |
| Operating and SG&A expense                                                                                              | 135.0          |           | 130.7 |   | 272.2 | 248.9 |
| Depreciation and amortization                                                                                               | 5.9            |           | 6.3 |   | 11.6 | 11.6 |
| Total operating expense                                                                                                     | 140.9          |           | 137.0 |   | 283.8 | 260.5 |
| Operating income                                                                                                            | 77.8           |           | 77.6 |   | 155.5 | 131.3 |
| Interest and other, net                                                                                                     | (10.7)         |           | (7.3) |   | (21.6) | (3.2) |
| Net income                                                                                                                  | $ 67.1         |           | $ 70.3 |   | $ 133.9 | $ 128.1 |

| X                                                                                                                                                                                                                                                                       |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Equity Method Investment Operating Expense
+ References
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| - Definition
The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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| - Definition
Amount of the cost of borrowed funds accounted for as interest expense.
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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.
+ References
No definition available.
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| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
The net result for the period of deducting operating expenses from operating revenues.
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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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