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Long-Lived Asset Impairment (Detail) hp in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) compressor_unit hp	Dec. 31, 2014 USD ($) compressor_unit hp	Dec. 31, 2013 USD ($) compressor_unit hp
Idle compressor units
Long-Lived Asset Impairment
Number of long-lived assets that the entity determined to retire and either sell or re-utilize key components (compressor units) | compressor_unit	900	290	280
Horsepower retired from the contract operations business (horsepower) | hp	371	112	76
Long-lived asset impairment	$ 111.7	$ 30.4	$ 14.9
Idle compressor units previously impaired
Long-Lived Asset Impairment
Long-lived asset impairment	$ 13.3	11.7
Other long lived assets
Long-Lived Asset Impairment
Long-lived asset impairment		$ 0.7	$ 1.8

X

- Definition

The number of long-lived assets that the entity determined to retire and either sell or re-utilize key components.

+ References

No definition available.

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- Definition

The capacity of long-lived assets that the entity determined to retire and either sell or re-utilize key components, expressed in horsepower.

+ References

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- Definition

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+ References

No definition available.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 958
-SubTopic 225
-Section 45
-Paragraph 11
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68048823&loc=d3e92212-112881

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Impairment
-URI http://asc.fasb.org/extlink&oid=6515133

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2921-110230

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

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