PROPERTY

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

PROPERTY

PROPERTY

The following table provides a breakdown of property:

Property at Dec 31	Estimated Useful  Lives (Years)	2018		2017
In millions
Land and land improvements	0-25	$	2,059	$	1,868
Buildings	5-50	4,745		4,600
Machinery and equipment	3-25	40,250		38,131
Other property	3-50	5,084		4,969
Construction in progress	—	1,846		3,241
Total property		$	53,984	$	52,809

In millions	2018		2017		2016
Depreciation expense	$	2,174	$	1,955	$	1,729
Capitalized interest	$	88	$	240	$	243