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Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, plant and equipment, net
Property, plant and equipment, gross	$ 4,817,383,000	$ 4,781,706,000
Accumulated depreciation	(1,975,352,000)	(1,847,042,000)
Property, plant and equipment, net	2,842,031,000	2,934,664,000	3,014,598,000
Depreciation expense	330,100,000	333,000,000	364,700,000
Assets under construction	147,000,000	140,500,000
Capitalized interest related to construction	1,200,000	1,500,000	1,700,000
Compression equipment, facilities and other fleet assets
Property, plant and equipment, net
Property, plant and equipment, gross	4,207,772,000	4,226,307,000
Land and buildings
Property, plant and equipment, net
Property, plant and equipment, gross	186,410,000	176,764,000
Transportation and shop equipment
Property, plant and equipment, net
Property, plant and equipment, gross	261,520,000	233,689,000
Other
Property, plant and equipment, net
Property, plant and equipment, gross	$ 161,681,000	$ 144,946,000

X

- Definition

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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-Publisher SEC

-Name Regulation S-X (SX)

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- Definition

Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be 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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