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Accrued Warranty Costs - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2013
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

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