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

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 45

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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

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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.

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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,543us-gaap_PropertyPlantAndEquipmentGross	$ 8,638us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation	(5,777)	(5,160)
Property, plant and equipment, net	3,766us-gaap_PropertyPlantAndEquipmentNet	3,478us-gaap_PropertyPlantAndEquipmentNet
Depreciation	998us-gaap_Depreciation	867us-gaap_Depreciation	780us-gaap_Depreciation
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	255	229
Equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,684	5,973
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,308	2,089
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	162	132
Building construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	134	215
Assets held for future use
Property, Plant and Equipment [Line Items]
Construction in progress on facilities held for future use	$ 76