Acquisitions	6 Months Ended
	Jun. 27, 2020
Business Combinations [Abstract]
Acquisitions	AcquisitionsDuring the six months ended June 27, 2020, the Corporation acquired three residential building products distributors, in January 2020, March 2020 and June 2020. All transactions were asset acquisitions and were consummated entirely in cash. The aggregate purchase price was approximately $12 million, and the preliminary allocation includes $10.5 million of goodwill, which is tax deductible. The remaining assets and liabilities acquired are not material. The Corporation will finalize the allocation of the purchase price during 2020 based on the final purchase price and any adjustments required over the remaining measurement period.