Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

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 December 31,
	2020		2019		2018
Cash and cash equivalents	$	16.0	$	187.4	$	25.7
Restricted cash and cash equivalents	380.2		330.3		303.6
Total cash and cash equivalents and restricted cash and cash equivalents	$	396.2	$	517.7	$	329.3