PROPERTY AND EQUIPMENT, NET

12 Months Ended

Dec. 31, 2020

Property Plant And Equipment [Abstract]

PROPERTY AND EQUIPMENT, NET

NOTE 7: PROPERTY AND EQUIPMENT, NET

Property and equipment includes land, buildings and improvements, machinery and equipment, roads and other items.

Carrying Value of Property and Equipment and Estimated Service Lives

DOLLAR AMOUNTS IN MILLIONS
	RANGE OF LIVES	DECEMBER 31, 2020			DECEMBER 31, 2019
Property and equipment, at cost:
Land	N/A	$	84		$	87
Buildings and improvements	15-40		1,049			999
Machinery and equipment	5-25		3,486			3,425
Roads	10-35		725			742
Other	3-10		101			193
Total cost			5,445			5,446
Accumulated depreciation and amortization			(3,432	)		(3,477	)
Property and equipment, net		$	2,013		$	1,969

SERVICE LIVES AND DEPRECIATION

In general, additions are classified into components, each with its own estimated useful life as determined at the time of purchase.

Depreciation and amortization expense for property and equipment was:

• $243 million in 2020,

• $240 million in 2019 and

• $197 million in 2018.