Subsequent Event - Addtional Information (Detail) - Definitive Agreement [Member] - Subsequent Event [Member] - Western Window Systems [Member] $ in Millions	Jul. 24, 2018 USD ($)
Subsequent Event [Line Items]
Acquisition of cash	$ 360
Incremental debt	$ 315

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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