Derivative Instruments and Fair Value Accounting Fair Value Tables (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value, Inputs, Level 1 [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The assets measured as Level 1 in the fair value hierarchy are summarized below:

	Level 1
	March 31, 2019		December 31, 2018
	(in millions)
Assets:
Cash equivalents	$	30.0	$	124.9
Restricted cash	114.2		171.6
Total assets	$	144.2	$	296.5

Fair Value, Inputs, Level 2 [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The liabilities measured as Level 2 in the fair value hierarchy are summarized below:

	Level 2
	March 31, 2019		December 31, 2018
	(in millions)
Liabilities:
Interest rate hedge (1)	$	19.5	$	12.9
Total liabilities	$	19.5	$	12.9

⁽¹⁾Included in accrued liabilities in our Consolidated Balance Sheets