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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Cash Flow, Supplemental Disclosures [Text Block] | The following tables reconcile the consolidated statement of cash flows line items impacted by the adoption of this standard on January 1, 2018:
(In millions) | For the Year Ended December 31, 2017
| Adjusted |  | ASU 2016-18 Adjustment |  | Previously Reported
Decrease (increase) in restricted cash and cash equivalents | $ | — |  |  | $ | 30.9 |  |  | $ | (30.9 | )
Net cash used in investing activities | (871.8 | ) |  | 30.9 |  |  | (902.7 | )
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents | 24.5 |  |  | 30.9 |  |  | (6.4 | )
Cash and cash equivalents and restricted cash and cash equivalents, beginning of period | 239.3 |  |  | 224.7 |  |  | 14.6 |
Cash and cash equivalents and restricted cash and cash equivalents, end of period | $ | 263.8 |  |  | $ | 255.6 |  |  | $ | 8.2 |
(In millions) | For the Year Ended December 31, 2016
| Adjusted |  | ASU 2016-18 Adjustment |  | Previously Reported
Decrease (increase) in restricted cash and cash equivalents | $ | — |  |  | $ | 57.3 |  |  | $ | (57.3 | )
Net cash used in investing activities | (878.2 | ) |  | 57.3 |  |  | (935.5 | )
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents | 65.6 |  |  | 57.3 |  |  | 8.3 |
Cash and cash equivalents and restricted cash and cash equivalents, beginning of period | 173.7 |  |  | 167.4 |  |  | 6.3 |
Cash and cash equivalents and restricted cash and cash equivalents, end of period | $ | 239.3 |  |  | $ | 224.7 |  |  | $ | 14.6 |
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
| December 31, 2018 |  | December 31, 2017 |  | December 31, 2016
Cash and cash equivalents | $ | 25.7 |  |  | $ | 8.2 |  |  | $ | 14.6 |
Restricted cash and cash equivalents | 303.6 |  |  | 255.6 |  |  | 224.7 |
Total cash and cash equivalents and restricted cash and cash equivalents | $ | 329.3 |  |  | $ | 263.8 |  |  | $ | 239.3 |

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -URI http://asc.fasb.org/topic&trid=2134446 + Details
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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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