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Commitments and Contingencies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2017 States
Commitments And Contingencies Disclosure [Abstract]
Construction defect legal claims in states	2

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- Definition

Number of states in construction defect legal claims.

+ References

No definition available.

+ Details

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Namespace Prefix:	bldr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration