Condensed Consolidated Statements of Cash Flows (Parenthetical)	12 Months Ended
Dec. 29, 2016	Dec. 31, 2015	Dec. 25, 2014
Statement of Cash Flows [Abstract]
Fiscal year period	364 days	371 days	364 days

The length of the fiscal year, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	fnd_FiscalYearPeriod
Namespace Prefix:	fnd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration