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Accrued Warranty Costs - Additional Information (Detail)
 6 Months Ended
Jun. 30, 2015
Disclosure Accrued Product Warranty Costs [Abstract]  
Commercial and industrial product base warranty coverage for manufactured equipment Eighteen months from the date of shipment or twelve months from the date of start-up, whichever is shorter
Commercial and industrial product base warranty coverage for spare parts 90 days
Residential products, the base warranty coverage from the date of shipment for material 10 years
Residential products warranty coverage for labor associated with repair 5 years