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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents [Table Text Block]

(In millions)	As of
	March 31, 2019				December 31, 2018				March 31, 2018				December 31, 2017
Cash and cash equivalents	$	41.3			$	25.7			$	11.5			$	8.2
Restricted cash and cash equivalents	417.9				303.6				368.5				255.6
Total cash and cash equivalents and restricted cash and cash equivalents	$	459.2			$	329.3			$	380.0			$	263.8

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Tabular disclosure of the components of cash and cash equivalents.

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