Revenues (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of Accounts Receivable [Table Text Block]

Accounts receivable, net at March 31, 2018 and December 31, 2017 consisted of the following:



	March 31, 2018		December 31, 2017
	(Dollars in millions)
Trade receivables, net	$	388.0	$	504.2
Miscellaneous receivables, net	136.0		47.9
Accounts receivable, net	$	524.0	$	552.1

Disaggregation of Revenue by Product Type and Market [Table Text Block]

With respect to its Australian Mining segments, the Company classifies as “Export” certain revenue from domestically-delivered coal under contracts in which the price is derived on a basis similar to export contracts.



	Successor
	Three Months Ended March 31, 2018
	Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Australian Metallurgical Mining		Australian Thermal Mining		Trading and Brokerage		Corporate and Other		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	389.2	$	200.9	$	130.3	$	—	$	36.1	$	—	$	—	$	756.5
Export	—		0.7		8.0		—		164.9		—		—		173.6
Total thermal	389.2		201.6		138.3		—		201.0		—		—		930.1
Metallurgical coal
Export	—		—		—		465.3		—		—		—		465.3
Total metallurgical	—		—		—		465.3		—		—		—		465.3
Other	0.1		0.1		5.4		0.9		0.4		20.1		40.3		67.3
Total revenues	$	389.3	$	201.7	$	143.7	$	466.2	$	201.4	$	20.1	$	40.3	$	1,462.7

	Predecessor
	Three Months Ended March 31, 2017
	Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Australian Metallurgical Mining		Australian Thermal Mining		Trading and Brokerage		Corporate and Other		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	394.3	$	193.2	$	133.5	$	—	$	27.3	$	—	$	—	$	748.3
Export	—		—		—		—		197.2		—		—		197.2
Total thermal	394.3		193.2		133.5		—		224.5		—		—		945.5
Metallurgical coal
Export	—		—		—		324.6		—		—		—		324.6
Total metallurgical	—		—		—		324.6		—		—		—		324.6
Other	—		—		16.2		4.3		0.3		15.0		20.3		56.1
Total revenues	$	394.3	$	193.2	$	149.7	$	328.9	$	224.8	$	15.0	$	20.3	$	1,326.2

Disaggregation of Revenue by Contract Duration [Table Text Block]

Revenue by contract duration was as follows:



	Successor
	Three Months Ended March 31, 2018
	Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Australian Metallurgical Mining		Australian Thermal Mining		Trading and Brokerage		Corporate and Other		Consolidated
	(Dollars in millions)
Long-term contracts	$	211.8	$	106.4	$	117.7	$	7.6	$	44.6	$	—	$	—	$	488.1
Short-term contracts	131.6		81.2		9.6		389.9		132.7		—		—		745.0
Spot	45.8		14.0		11.0		67.8		23.7		—		—		162.3
Other	0.1		0.1		5.4		0.9		0.4		20.1		40.3		67.3
Total revenues	$	389.3	$	201.7	$	143.7	$	466.2	$	201.4	$	20.1	$	40.3	$	1,462.7

	Predecessor
	Three Months Ended March 31, 2017
	Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Australian Metallurgical Mining		Australian Thermal Mining		Trading and Brokerage		Corporate and Other		Consolidated
	(Dollars in millions)
Long-term contracts	$	238.5	$	130.0	$	119.4	$	4.9	$	33.4	$	—	$	—	$	526.2
Short-term contracts	119.2		63.2		9.9		235.7		100.7		—		—		528.7
Spot	36.6		—		4.2		84.0		90.4		—		—		215.2
Other	—		—		16.2		4.3		0.3		15.0		20.3		56.1
Total revenues	$	394.3	$	193.2	$	149.7	$	328.9	$	224.8	$	15.0	$	20.3	$	1,326.2