Financial Instruments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

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

As of December 31, 2018, the fair value of the interest rate swap liability was $5.0 million and is recorded in the Consolidated Balance Sheets as of December 31, 2018 as follows:

				December 31, 2018
(dollars in millions)	Balance Sheet Location	December 31, 2018		Quoted Prices in active markets Level 1		Significant observable inputs Level 2		Significant unobservable inputs Level 3
Liabilities:
Interest Rate Swap	Other noncurrent liabilities	$	3.8	$	—	$	3.8	$	—
Interest Rate Swap	Other current liabilities	$	1.2	$	—	$	1.2	$	—

Amount of gains recognized in accumulated other comprehensive income net of reclassification into earnings [Table Text Block]

The amount of losses recognized in Accumulated Other Comprehensive Income ("AOCI") net of reclassifications into earnings is as follows:

	Year Ended
	December 31,
(dollars in millions)	2018
Interest Rate Swap	$	(5.0	)

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

The amount of losses reclassified from AOCI into earnings is as follows:

		Year Ended
		December 31,
(dollars in millions)	Statement of Operations Location	2018
Interest Rate Swap	Interest Expense	$	(1.2	)

Fair Value, by Balance Sheet Grouping

The carrying and fair values of these items are as follows:

	December 31, 2018				December 31, 2017
(dollars in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current portion*	$	1,880.0	$	1,673.6	$	1,687.1	$	1,687.5
Other financing arrangements	44.6		43.6		—		—
*Excludes capital leases and note issuance costs

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Table Text Block]

During 2017, the following assets were remeasured at fair value in connection with impairment tests:

		Fair Value Measurements Using
(dollars in millions)	Year Ended December 31, 2017	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)	Impairment Losses
Equity method investment:
Equity method investment	—	—	—	—	$	(4.7	)
Impairment of equity method investment					$	(4.7	)