Property, Plant and Equipment (Notes)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment Disclosure [Text Block]

8. Property, Plant and Equipment, Net

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

	December 31,
(Dollars in millions)	2018		2017
Land, Buildings and Leasehold Improvements	$	1,303	$	1,551
Rental and Service Equipment	4,869		5,621
Machinery and Other	1,700		2,138
	7,872		9,310
Less: Accumulated Depreciation	5,786		6,602
Property, Plant and Equipment, Net	$	2,086	$	2,708

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	Estimated Useful Lives
Buildings and leasehold improvements	10 – 40 years or lease term
Rental and service equipment	2 – 15 years
Machinery and other	2 – 12 years

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

	December 31,
(Dollars in millions)	2018		2017
Land, Buildings and Leasehold Improvements	$	1,303	$	1,551
Rental and Service Equipment	4,869		5,621
Machinery and Other	1,700		2,138
	7,872		9,310
Less: Accumulated Depreciation	5,786		6,602
Property, Plant and Equipment, Net	$	2,086	$	2,708