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Properties (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Properties

									Accumulated						Net Book						Depreciation
December 31, 2020			Cost						Depreciation						Value						Rate (1)
			($ in millions)
Land			$	2,394					$	—					$	2,394					—
Roadway:
Rail and other track material			7,153						(1,892)						5,261						2.35		%
Ties			5,685						(1,601)						4,084						3.41		%
Ballast			2,973						(774)						2,199						2.76		%
Construction in process			297						—						297						—
Other roadway			14,320						(3,926)						10,394						2.71		%
Total roadway			30,428						(8,193)						22,235
Equipment:
Locomotives			5,478						(1,911)						3,567						3.56		%
Freight cars			2,780						(1,023)						1,757						2.59		%
Computers and software			732						(391)						341						9.86		%
Construction in process			333						—						333						—
Other equipment			1,094						(399)						695						4.70		%
Total equipment			10,417						(3,724)						6,693
Other property			91						(68)						23						2.24		%
Total properties			$	43,330					$	(11,985)					$	31,345

									Accumulated						Net Book						Depreciation
December 31, 2019			Cost						Depreciation						Value						Rate (1)
			($ in millions)
Land			$	2,385					$	—					$	2,385					—
Roadway:
Rail and other track material			7,024						(1,905)						5,119						2.30		%
Ties			5,536						(1,496)						4,040						3.37		%
Ballast			2,868						(723)						2,145						2.72		%
Construction in process			360						—						360						—
Other roadway			14,261						(3,786)						10,475						2.71		%
Total roadway			30,049						(7,910)						22,139
Equipment:
Locomotives			5,973						(2,112)						3,861						3.66		%
Freight cars			2,988						(1,148)						1,840						2.45		%
Computers and software			732						(355)						377						9.68		%
Construction in process			291						—						291						—
Other equipment			1,082						(388)						694						4.89		%
Total equipment			11,066						(4,003)						7,063
Other property			96						(69)						27						1.05		%
Total properties			$	43,596					$	(11,982)					$	31,614

(1)Composite annual depreciation rate for the underlying assets, excluding the effects of the amortization of any deficiency (or excess) that resulted from our depreciation studies.

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- References

No definition available.

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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