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Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2019

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

With respect to its seaborne 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.



	Three Months Ended June 30, 2019
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	37.7	$	—	$	282.5	$	167.5	$	130.7	$	—	$	618.4
Export	182.2		—		—		—		4.3		—		186.5
Total thermal	219.9		—		282.5		167.5		135.0		—		804.9
Metallurgical coal
Export	—		290.3		—		—		—		—		290.3
Total metallurgical	—		290.3		—		—		—		—		290.3
Other	0.3		0.6		0.1		—		7.1		45.7		53.8
Revenues	$	220.2	$	290.9	$	282.6	$	167.5	$	142.1	$	45.7	$	1,149.0



	Three Months Ended June 30, 2018
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾			Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	38.5	$	—	$	321.5	$	196.9	$	131.1	$	—		$	688.0
Export	228.7		—		—		0.6		4.3		—			233.6
Total thermal	267.2		—		321.5		197.5		135.4		—			921.6
Metallurgical coal
Export	—		417.2		—		—		—		—			417.2
Total metallurgical	—		417.2		—		—		—		—			417.2
Other	0.2		0.3		—		—		4.2		(34.1		)	(29.4		)
Revenues	$	267.4	$	417.5	$	321.5	$	197.5	$	139.6	$	(34.1	)	$	1,309.4



	Six Months Ended June 30, 2019
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	76.1	$	—	$	569.8	$	346.5	$	273.4	$	—	$	1,265.8
Export	394.1		—		—		—		11.3		—		405.4
Total thermal	470.2		—		569.8		346.5		284.7		—		1,671.2
Metallurgical coal
Export	—		614.0		—		—		—		—		614.0
Total metallurgical	—		614.0		—		—		—		—		614.0
Other	1.0		1.4		0.1		0.1		13.1		98.7		114.4
Revenues	$	471.2	$	615.4	$	569.9	$	346.6	$	297.8	$	98.7	$	2,399.6



	Six Months Ended June 30, 2018
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	74.6	$	—	$	710.7	$	397.8	$	261.4	$	—	$	1,444.5
Export	393.6		—		—		1.3		12.3		—		407.2
Total thermal	468.2		—		710.7		399.1		273.7		—		1,851.7
Metallurgical coal
Export	—		882.5		—		—		—		—		882.5
Total metallurgical	—		882.5		—		—		—		—		882.5
Other	0.6		1.2		0.1		0.1		9.6		26.3		37.9
Revenues	$	468.8	$	883.7	$	710.8	$	399.2	$	283.3	$	26.3	$	2,772.1

Disaggregation of Revenue by Contract Duration [Table Text Block]

Revenue by contract duration was as follows:



	Three Months Ended June 30, 2019
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
One year or longer	$	150.6	$	242.7	$	269.7	$	158.2	$	132.6	$	—	$	953.8
Less than one year	69.3		47.6		12.8		9.3		2.4		—		141.4
Other ⁽²⁾	0.3		0.6		0.1		—		7.1		45.7		53.8
Revenues	$	220.2	$	290.9	$	282.6	$	167.5	$	142.1	$	45.7	$	1,149.0



	Three Months Ended June 30, 2018
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾			Consolidated
	(Dollars in millions)
One year or longer	$	173.2	$	255.1	$	310.8	$	194.1	$	126.5	$	—		$	1,059.7
Less than one year	94.0		162.1		10.7		3.4		8.9		—			279.1
Other ⁽²⁾	0.2		0.3		—		—		4.2		(34.1		)	(29.4		)
Revenues	$	267.4	$	417.5	$	321.5	$	197.5	$	139.6	$	(34.1	)	$	1,309.4



	Six Months Ended June 30, 2019
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
One year or longer	$	321.7	$	475.5	$	549.8	$	326.0	$	278.6	$	—	$	1,951.6
Less than one year	148.5		138.5		20.0		20.5		6.1		—		333.6
Other ⁽²⁾	1.0		1.4		0.1		0.1		13.1		98.7		114.4
Revenues	$	471.2	$	615.4	$	569.9	$	346.6	$	297.8	$	98.7	$	2,399.6



	Six Months Ended June 30, 2018
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Midwestern U.S. Mining		Western U.S. Mining		Corporate and Other ⁽¹⁾		Consolidated
	(Dollars in millions)
One year or longer	$	350.5	$	652.6	$	654.2	$	381.7	$	253.8	$	—	$	2,292.8
Less than one year	117.7		229.9		56.5		17.4		19.9		—		441.4
Other ⁽²⁾	0.6		1.2		0.1		0.1		9.6		26.3		37.9
Revenues	$	468.8	$	883.7	$	710.8	$	399.2	$	283.3	$	26.3	$	2,772.1


⁽¹⁾	Corporate and Other revenue includes gains and losses related to mark-to-market adjustments from economic hedge activities intended to hedge future coal sales. Refer to Note 8. “Derivatives and Fair Value Measurements” for additional information regarding the economic hedge activities.

⁽²⁾

Other includes revenues from arrangements such as customer contract-related payments, royalties related to coal lease agreements, sales agency commissions, farm income and property and facility rentals, for which contract duration is not meaningful.

Schedule of Accounts Receivable [Table Text Block]

“Accounts receivable, net” at June 30, 2019 and December 31, 2018 consisted of the following:



	June 30, 2019		December 31, 2018
	(Dollars in millions)
Trade receivables, net	$	345.6	$	345.5
Miscellaneous receivables, net	50.1		104.9
Accounts receivable, net	$	395.7	$	450.4