Derivatives and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Classification and amounts of pre-tax gains and losses related to the Company's non coal-trading hedges

The tables below show the classification and amounts of pre-tax gains and losses related to the Company’s Corporate Hedging derivatives:




			Successor
			Three Months Ended March 31, 2018
Financial Instrument	Income Statement Classification of Losses		Total loss recognized in income			Loss realized in income on derivatives			Unrealized loss recognized in income on non-designated derivatives
		(Dollars in millions)
Foreign currency option contracts	Operating costs and expenses		$	(4.2	)	$	(2.4	)	$	(1.8	)
Total			$	(4.2	)	$	(2.4	)	$	(1.8	)




			Predecessor
			Three Months Ended March 31, 2017
Financial Instrument	Income Statement Classification of Losses		Total loss recognized in income			Loss reclassified from other comprehensive loss into income
		(Dollars in millions)
Commodity swap contracts	Operating costs and expenses		$	(11.0	)	$	(11.0	)
Foreign currency forward contracts	Operating costs and expenses		(16.6		)	(16.6		)
Total			$	(27.6	)	$	(27.6	)

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

The following tables set forth the hierarchy of the Company’s net financial asset positions for which fair value is measured on a recurring basis:



	March 31, 2018
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Foreign currency contracts	$	—	$	2.3	$	—	$	2.3
Total net financial assets	$	—	$	2.3	$	—	$	2.3

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(Dollars in millions)
Foreign currency contracts	$	—	$	4.2	$	—	$	4.2
Total net financial assets	$	—	$	4.2	$	—	$	4.2

Carrying amounts and estimated fair values of the Company's debt

The carrying amounts and estimated fair values of the Company’s current and long-term debt as of March 31, 2018 and December 31, 2017 are summarized as follows:



	March 31, 2018				December 31, 2017
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
	(Dollars in millions)
Current and Long-term debt	$	1,455.2	$	1,535.6	$	1,460.8	$	1,547.4