Property, Plant and Equipment - Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment Gross	$ 4,523	$ 3,660
Less: Accumulated Depreciation	(1,578)	(1,215)
Property, plant and equipment, net	2,945	2,445
Land and building [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment Gross	1,348	1,069
Estimated Useful Lives	5-35 Years
Operating equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment Gross	2,463	1,955
Estimated Useful Lives	3-15 Years
Rental equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment Gross	$ 712	$ 636
Estimated Useful Lives	3-12 Years

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived 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, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived 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, furniture and fixtures, and computer equipment.

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