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Property, Plant, Equipment and Mine Development
 9 Months Ended
Sep. 30, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant, Equipment and Mine Development
Property, Plant, Equipment and Mine Development
The composition of property, plant, equipment and mine development, net, as of September 30, 2017 and December 31, 2016 is set forth in the table below. Refer to Note 3. “Emergence from the Chapter 11 Cases and Fresh Start Reporting” for details regarding the impact of fresh start reporting on property, plant, equipment and mine development.
 
Successor
Predecessor
 
September 30, 2017
December 31, 2016
 
(Dollars in millions)
Land and coal interests
$
3,819.7

$
10,330.8

Buildings and improvements
457.3

1,507.6

Machinery and equipment
1,077.4

2,130.2

Less: Accumulated depreciation, depletion and amortization
(271.8
)
(5,191.9
)
Total, net
$
5,082.6

$
8,776.7