Property, Plant, and Equipment (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	23,482us-gaap_PropertyPlantAndEquipmentGross	$ 20,802us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation	11,007	9,480
Net property, plant, and equipment	12,475us-gaap_PropertyPlantAndEquipmentNet	11,322us-gaap_PropertyPlantAndEquipmentNet
Land
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	217	213
Buildings and property improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	3,311	2,685
Buildings and property improvements \| 1 - 10 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	12.00%	13.00%
Buildings and property improvements \| 11 - 20 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	42.00%	43.00%
Buildings and property improvements \| 21 - 30 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	21.00%	20.00%
Buildings and property improvements \| 31 - 40 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	25.00%	24.00%
Machinery, equipment, and other
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	19,954	$ 17,904
Machinery, equipment, and other \| 1 - 5 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	23.00%	22.00%
Machinery, equipment, and other \| 6 - 10 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	70.00%	72.00%
Machinery, equipment, and other \| 11 - 20 years
Property Plant Equipment Useful Lives Total Depreciated Percentages [Abstract]
Ratio of depreciation by useful asset life over total depreciation of asset (in hundredths)	7.00%	6.00%
Minimum \| Buildings and property improvements \| 1 - 5 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	1 year
Minimum \| Buildings and property improvements \| 6 - 10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	6 years
Minimum \| Buildings and property improvements \| 1 - 10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	1 year
Minimum \| Buildings and property improvements \| 11 - 20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	11 years
Minimum \| Buildings and property improvements \| 21 - 30 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	21 years
Minimum \| Buildings and property improvements \| 31 - 40 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	31 years
Maximum \| Buildings and property improvements \| 1 - 5 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	5 years
Maximum \| Buildings and property improvements \| 6 - 10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	10 years
Maximum \| Buildings and property improvements \| 1 - 10 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	10 years
Maximum \| Buildings and property improvements \| 11 - 20 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	20 years
Maximum \| Buildings and property improvements \| 21 - 30 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	30 years
Maximum \| Buildings and property improvements \| 31 - 40 years
Property, Plant and Equipment [Line Items]
Property, plant, and equipment useful lives	40 years

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The ratio of depreciation by useful asset life in relation to the total depreciation of the asset during the period.

+ References

No definition available.

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- 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/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

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- 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/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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://www.xbrl.org/2003/role/presentationRef

-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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-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=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 13

-Subparagraph a

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

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- 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

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