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Long-Lived Asset Impairment (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Jun. 30, 2013
Fabrication
Dec. 31, 2013
Fabrication
Dec. 31, 2013
Idle compressor units
hp
CompressorUnit
Dec. 31, 2012
Idle compressor units
CompressorUnit
hp
Dec. 31, 2011
Idle compressor units
Dec. 31, 2013
Other long lived assets
Dec. 31, 2012
Other long lived assets
Dec. 31, 2011
Other long lived assets
Dec. 31, 2012
Idle compressor units previously impaired
Long-Lived Asset Impairment                  
Number of long-lived assets that the entity determined to retire and either sell or re-utilize key components     280 930          
Horsepower retired from the contract operations business     76,000 318,000          
Long-lived asset impairment     $ 14.9 $ 97.1 $ 5.7 $ 1.8 $ 4.7 $ 0.4 $ 34.8
Long-lived asset impairment $ 11.9 $ 11.9