Properties (Tables)

12 Months Ended

Dec. 31, 2024

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 2024		Cost		Depreciation		Value		Rate	(Avg. Years)	Method
Road
	Rail and Other Track Material	$	9,883	$	(2,199)	$	7,684	2.5%	41	Group Life
	Ties	7,269		(2,252)		5,017		3.5%	28	Group Life
	Grading	2,813		(699)		2,114		1.3%	75	Group Life
	Ballast	3,494		(1,159)		2,335		2.6%	38	Group Life
	Bridges, Trestles, and Culverts	3,234		(572)		2,662		1.7%	60	Group Life
	Signals and Interlockers	3,476		(1,480)		1,996		4.1%	24	Group Life
	Buildings	1,498		(568)		930		2.5%	40	Group Life/ Straight Line (a)
	Other	6,017		(2,719)		3,298		4.1%	25	Group Life/ Straight Line (a)
Total Road		37,684		(11,648)		26,036
Equipment
	Locomotive	5,252		(2,175)		3,077		3.8%	26	Group Life
	Freight Cars	2,311		(407)		1,904		3.1%	32	Group Life
	Work Equipment and Other	3,599		(2,303)		1,296		8.9%	11	Group Life/ Straight Line (a)
Total Equipment		11,162		(4,885)		6,277
Land		2,276		—		2,276		N/A	N/A	N/A
Construction In Progress		1,069		—		1,069		N/A	N/A	N/A
Total Properties		$	52,191	$	(16,533)	$	35,658

(a) For depreciation method, certain asset categories contain intermodal terminals, trucking 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 2023 (a)		Cost		Depreciation		Value		Rate	(Avg. Years)	Method
Road
	Rail and Other Track Material	$	9,498	$	(2,153)	$	7,345	2.5%	41	Group Life
	Ties	7,020		(2,131)		4,889		3.5%	28	Group Life
	Grading	2,796		(668)		2,128		1.3%	75	Group Life
	Ballast	3,424		(1,119)		2,305		2.6%	38	Group Life
	Bridges, Trestles, and Culverts	3,121		(525)		2,596		1.7%	60	Group Life
	Signals and Interlockers	3,376		(1,351)		2,025		4.1%	24	Group Life
	Buildings	1,530		(608)		922		2.5%	40	Group Life/ Straight Line (b)
	Other	5,786		(2,546)		3,240		4.1%	25	Group Life/ Straight Line (b)
Total Road		36,551		(11,101)		25,450
Equipment
	Locomotive	4,952		(1,981)		2,971		3.8%	26	Group Life
	Freight Cars	2,300		(378)		1,922		3.1%	32	Group Life
	Work Equipment and Other	3,391		(2,100)		1,291		8.9%	11	Group Life/ Straight Line (b)
Total Equipment		10,643		(4,459)		6,184
Land		2,272		—		2,272		N/A	N/A	N/A
Construction In Progress		815		—		815		N/A	N/A	N/A
Total Properties		$	50,281	$	(15,560)	$	34,721

(a) See Note 20, Revision of Prior Period Financial Statements.

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