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Related Party Transactions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021
Related Party Transactions [Abstract]
Percentage of accounts receivable due from and net sales	1.00%

X

- Definition

Percentage of accounts receivable due from and net sales.

+ References

No definition available.

+ Details

Name:	bldr_PercentageOfAccountsReceivableDueFromAndNetSales
Namespace Prefix:	bldr_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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