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Summary of Significant Accounting Policies Summary of Significant Accounting Policies
 3 Months Ended
Mar. 31, 2021
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
 March 31, 2021December 31, 2020March 31, 2020December 31, 2019
Cash and cash equivalents$45.7 $16.0 $25.7 $187.4 
Restricted cash and cash equivalents538.5 380.2 408.1 330.3 
Total cash and cash equivalents and restricted cash and cash equivalents
$584.2 $396.2 $433.8 $517.7