Property and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Property, Plant and Equipment
Property and equipment, gross	$ 3,023	$ 1,925
Accumulated depreciation and amortization	(734)	(450)
Property and equipment, net	2,289	1,475
Network Equipment
Property, Plant and Equipment
Property and equipment, gross	1,628	1,016
Land
Property, Plant and Equipment
Property and equipment, gross	35	34
Buildings
Property, Plant and Equipment
Property and equipment, gross	454	355
Leasehold Improvements
Property, Plant and Equipment
Property and equipment, gross	163	120
Computer software, office equipment and other
Property, Plant and Equipment
Property and equipment, gross	88	73
Construction in Progress
Property, Plant and Equipment
Property and equipment, gross	$ 655	$ 327

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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