Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

Revenue Recognition [Abstract]

Disaggregation of Revenue by Product Type and Market

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 September 30, 2021
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Other U.S. Thermal Mining		Corporate and Other (1)		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	41.1	$	—	$	247.3	$	181.0	$	—	$	469.4
Export	219.4		—		—		2.2		—		221.6
Total thermal	260.5		—		247.3		183.2		—		691.0
Metallurgical coal
Export	—		176.8		—		—		—		176.8
Total metallurgical	—		176.8		—		—		—		176.8
Other (2)	0.2		2.7		(0.2)		1.4		(192.9)		(188.8)
Revenues	$	260.7	$	179.5	$	247.1	$	184.6	$	(192.9)	$	679.0

	Three Months Ended September 30, 2020
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Other U.S. Thermal Mining		Corporate and Other (1)		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	37.1	$	—	$	264.3	$	172.8	$	—	$	474.2
Export	125.7		—		—		—		—		125.7
Total thermal	162.8		—		264.3		172.8		—		599.9
Metallurgical coal
Export	—		78.4		—		—		—		78.4
Total metallurgical	—		78.4		—		—		—		78.4
Other (2)	0.2		0.4		0.5		7.0		(15.4)		(7.3)
Revenues	$	163.0	$	78.8	$	264.8	$	179.8	$	(15.4)	$	671.0

	Nine Months Ended September 30, 2021
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Other U.S. Thermal Mining		Corporate and Other (1)		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	132.7	$	—	$	724.5	$	487.8	$	—	$	1,345.0
Export	497.7		—		—		3.4		—		501.1
Total thermal	630.4		—		724.5		491.2		—		1,846.1
Metallurgical coal
Domestic	—		2.7		—		—		—		2.7
Export	—		381.1		—		—		—		381.1
Total metallurgical	—		383.8		—		—		—		383.8
Other (2)	0.8		4.2		(0.4)		4.8		(185.6)		(176.2)
Revenues	$	631.2	$	388.0	$	724.1	$	496.0	$	(185.6)	$	2,053.7

	Nine Months Ended September 30, 2020
	Seaborne Thermal Mining		Seaborne Metallurgical Mining		Powder River Basin Mining		Other U.S. Thermal Mining		Corporate and Other (1)		Consolidated
	(Dollars in millions)
Thermal coal
Domestic	$	111.9	$	—	$	736.7	$	501.5	$	—	$	1,350.1
Export	412.9		—		—		—		—		412.9
Total thermal	524.8		—		736.7		501.5		—		1,763.0
Metallurgical coal
Export	—		362.3		—		—		—		362.3
Total metallurgical	—		362.3		—		—		—		362.3
Other (2)	1.3		1.3		0.5		22.6		(7.1)		18.6
Revenues	$	526.1	$	363.6	$	737.2	$	524.1	$	(7.1)	$	2,143.9

(1)    Corporate and Other revenue includes net losses related to unrealized mark-to-market adjustments on derivatives related to forecasted sales and other financial trading activity of $238.4 million and $16.1 million during the three months ended September 30, 2021 and 2020, respectively, and $263.2 million and $13.7 million during the nine months ended September 30, 2021 and 2020, respectively. Refer to Note 7. “Derivatives and Fair Value Measurements” for additional information. Also included in Corporate and Other revenue are revenues with customers of $55.5 million and $97.3 million during the three and nine months ended September 30, 2021, respectively, and ($13.0) million and ($32.1) million during the three and nine months ended September 30, 2020, respectively.

(2)    Other includes revenues from arrangements such as customer contract-related payments associated with volume shortfalls, royalties related to coal lease agreements, sales agency commissions, farm income and property and facility rentals.

Schedule of Accounts Receivable

“Accounts receivable, net” at September 30, 2021 and December 31, 2020 consisted of the following:

	September 30, 2021		December 31, 2020
	(Dollars in millions)
Trade receivables, net	$	237.2	$	180.9
Miscellaneous receivables, net	38.8		63.9
Accounts receivable, net	$	276.0	$	244.8