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Discontinued Operations - Additional Information (Detail) - Climate Control Group [Member] - Discontinued Operations [Member] - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]    
Accounts receivable, net $ 2.7 $ 2.7
Amount held in escrow deposit 2.7 2.7
Current and noncurrent accrued and other liabilities $ 0.4 $ 5.5