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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Schedule of Cash and Cash Equivalents [Table Text Block] | The following table provides a reconciliation of cash and cash equivalents and restricted cash and cash equivalents reported in our consolidated balance sheets to the total shown in our consolidated statements of cash flows:
(In millions) | As of
| September 30, 2019 |  | December 31, 2018 |  | September 30, 2018 |  | December 31, 2017
Cash and cash equivalents | $ | 24.7 |  |  | $ | 25.7 |  |  | $ | 195.7 |  |  | $ | 8.2 |
Restricted cash and cash equivalents | 329.8 |  |  | 303.6 |  |  | 347.6 |  |  | 255.6 |
Total cash and cash equivalents and restricted cash and cash equivalents | $ | 354.5 |  |  | $ | 329.3 |  |  | $ | 543.3 |  |  | $ | 263.8 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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