Properties (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Net Properties

Details of the Company’s net properties are as follows:

(Dollars in Millions)				Accumulated		Net Book		Annual Depreciation	Estimated Useful Life	Depreciation
December 2020		Cost		Depreciation		Value		Rate	( Avg. Years)	Method
Road
	Rail and Other Track Material	$	8,449	$	(1,739)	$	6,710	2.5%	41	Group Life
	Ties	6,284		(1,780)		4,504		3.5%	28	Group Life
	Grading	2,768		(614)		2,154		1.3%	75	Group Life
	Ballast	3,238		(1,051)		2,187		2.6%	38	Group Life
	Bridges, Trestles, and Culverts	2,688		(380)		2,308		1.7%	60	Group Life
	Signals and Interlockers	3,170		(944)		2,226		4.1%	24	Group Life/ Straight Line (a)
	Buildings	1,366		(529)		837		2.5%	40	Group Life
	Other	5,146		(2,101)		3,045		4.1%	25	Group Life
Total Road		33,109		(9,138)		23,971
Equipment
	Locomotive	5,085		(1,849)		3,236		3.6%	27	Group Life
	Freight Cars	2,557		(540)		2,017		2.9%	35	Group Life
	Work Equipment and Other	2,585		(1,559)		1,026		8.2%	12	Group Life/ Straight Line (a)
Total Equipment		10,227		(3,948)		6,279
Land		1,823		—		1,823		N/A	N/A	N/A
Construction In Progress		371		—		371		N/A	N/A	N/A
Total Properties		$	45,530	$	(13,086)	$	32,444

(a) For depreciation method, certain asset categories contain intermodal terminals or technology-related assets, which are depreciated using the straight-line method.

NOTE 6.  Properties, continued

(Dollars in Millions)				Accumulated		Net Book		Annual Depreciation	Estimated Useful Life	Depreciation
December 2019		Cost		Depreciation		Value		Rate	(Avg. Years)	Method
Road
	Rail and Other Track Material	$	8,194	$	(1,719)	$	6,475	2.5%	40	Group Life
	Ties	6,041		(1,666)		4,375		3.7%	27	Group Life
	Grading	2,763		(595)		2,168		1.4%	72	Group Life
	Ballast	3,156		(1,013)		2,143		2.7%	37	Group Life
	Bridges, Trestles, and Culverts	2,529		(334)		2,195		1.6%	61	Group Life
	Signals and Interlockers	3,077		(819)		2,258		4.0%	25	Group Life/ Straight Line (a)
	Buildings	1,335		(492)		843		2.5%	40	Group Life
	Other	5,030		(1,980)		3,050		4.2%	24	Group Life
Total Road		32,125		(8,618)		23,507
Equipment
	Locomotive	5,320		(2,020)		3,300		3.6%	27	Group Life
	Freight Cars	2,964		(880)		2,084		2.9%	35	Group Life
	Work Equipment and Other	2,424		(1,414)		1,010		8.2%	12	Group Life/ Straight Line (a)
Total Equipment		10,708		(4,314)		6,394
Land		1,836		—		1,836		N/A	N/A	N/A
Construction In Progress		431		—		431		N/A	N/A	N/A
Total Properties		$	45,100	$	(12,932)	$	32,168

(a) For depreciation method, certain asset categories contain intermodal terminals or technology-related assets, which are depreciated using the straight-line method.