XML 65 R56.htm IDEA: XBRL DOCUMENT v3.23.2

Note 10 - Properties - Schedule of Property and Equipment Major Categories (Details) - USD ($) $ in Millions		Jun. 30, 2023		Dec. 31, 2022
Property, Plant and Equipment, Cost		$ 80,511		$ 79,255
Property, Plant and Equipment, Net		56,641		56,038
Property, Plant and Equipment, Accumulated Depreciation		23,870		23,217
Land [Member]
Property, Plant and Equipment, Cost		5,365		5,344
Property, Plant and Equipment, Net		5,365		5,344
Roadrail and Other Track Material [Member]
Property, Plant and Equipment, Cost		18,633		18,419
Property, Plant and Equipment, Net		11,411		11,323
Property, Plant and Equipment, Accumulated Depreciation		$ 7,222		$ 7,096
Property, Plant and Equipment, Useful Life (Year)		42 years		43 years
Road Ties [Member]
Property, Plant and Equipment, Cost		$ 11,845		$ 11,676
Property, Plant and Equipment, Net		8,046		7,977
Property, Plant and Equipment, Accumulated Depreciation		$ 3,799		$ 3,699
Property, Plant and Equipment, Useful Life (Year)		34 years		34 years
Road Ballast [Member]
Property, Plant and Equipment, Cost		$ 6,285		$ 6,222
Property, Plant and Equipment, Net		4,281		4,272
Property, Plant and Equipment, Accumulated Depreciation		$ 2,004		$ 1,950
Property, Plant and Equipment, Useful Life (Year)		34 years		34 years
Road, Other [Member]
Property, Plant and Equipment, Cost	[1]	$ 22,721		$ 22,411
Property, Plant and Equipment, Net		17,548	[1]	17,441
Property, Plant and Equipment, Accumulated Depreciation		$ 5,173	[1]	$ 4,970
Property, Plant and Equipment, Useful Life (Year)		47 years	[1]	47 years
Road [Member]
Property, Plant and Equipment, Cost		$ 59,484		$ 58,728
Property, Plant and Equipment, Net		41,286		41,013
Property, Plant and Equipment, Accumulated Depreciation		18,198		17,715
Equipment, Locomotives [Member]
Property, Plant and Equipment, Cost		9,319		9,166
Property, Plant and Equipment, Net		5,629		5,560
Property, Plant and Equipment, Accumulated Depreciation		$ 3,690		$ 3,606
Property, Plant and Equipment, Useful Life (Year)		18 years		18 years
Equipment, Freight Cars [Member]
Property, Plant and Equipment, Cost		$ 2,628		$ 2,562
Property, Plant and Equipment, Net		1,693		1,664
Property, Plant and Equipment, Accumulated Depreciation		$ 935		$ 898
Property, Plant and Equipment, Useful Life (Year)		23 years		23 years
Equipment, Work Equipment and Other [Member]
Property, Plant and Equipment, Cost		$ 1,301		$ 1,253
Property, Plant and Equipment, Net		793		780
Property, Plant and Equipment, Accumulated Depreciation		$ 508		$ 473
Property, Plant and Equipment, Useful Life (Year)		17 years		17 years
Equipment [Member]
Property, Plant and Equipment, Cost		$ 13,248		$ 12,981
Property, Plant and Equipment, Net		8,115		8,004
Property, Plant and Equipment, Accumulated Depreciation		5,133		4,977
Technology Equipment [Member]
Property, Plant and Equipment, Cost		1,280		1,254
Property, Plant and Equipment, Net		741		729
Property, Plant and Equipment, Accumulated Depreciation		$ 539		$ 525
Property, Plant and Equipment, Useful Life (Year)		12 years		12 years
Construction in Progress [Member]
Property, Plant and Equipment, Cost		$ 1,134		$ 948
Property, Plant and Equipment, Net		1,134		948
Property, Plant and Equipment, Accumulated Depreciation		$ 0		$ 0
[1] Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(14))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

Name:	us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 360
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 360
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480842/942-360-50-1

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_RoadrailAndOtherTrackMaterialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_RoadTiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_RoadBallastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_RoadOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_RoadMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_EquipmentLocomotivesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_EquipmentFreightCarsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=unp_EquipmentWorkEquipmentAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_TechnologyEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ConstructionInProgressMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: