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	$	2,557	$	2,535
Buildings	5-50	6,067		5,920
Machinery and equipment	3-25	45,133		43,208
Other property	3-50	5,414		5,277
Construction in progress	—	2,266		3,486
Total property		$	61,437	$	60,426

In millions	2018		2017		2016
Depreciation expense	$	2,432	$	2,329	$	2,130
Capitalized interest	$	88	$	240	$	243