Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment [Table Text Block]

The estimated useful lives of our major classes of PP&E are as follows:

Major Classes of Property, Plant and Equipment	Predecessor and Future PP&E Estimated Useful Lives
Buildings and leasehold improvements	10 – 40 years or lease term
Rental and service equipment	2 – 15 years (3 – 10 years for assets added after emergence)
Machinery and other	2 – 12 years

Property, plant and equipment, net was composed of the following:

	Successor		Predecessor
	December 31,		December 31,
(Dollars in millions)	2019		2018
Land, Buildings and Leasehold Improvements	$	571	$	1,303
Rental and Service Equipment	1,296		4,869
Machinery and Other	280		1,700
	2,147		7,872
Less: Accumulated Depreciation	25		5,786
Property, Plant and Equipment, Net	$	2,122	$	2,086

Depreciation expense for the Successor Period was $25 million and was $386 million during the Predecessor Period, and $493 million and $749 million for the years ended December 31, 2018 and 2017, respectively.