XML 37 R22.htm IDEA: XBRL DOCUMENT v3.7.0.1

Net Income per Common Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Stock Options
Earnings Per Share [Line Items]
Securities included in the computation of diluted EPS	3.0	4.3	3.0	4.3
Restricted Stock Units (RSUs)
Earnings Per Share [Line Items]
Securities included in the computation of diluted EPS	2.2	2.2	2.2	2.2

X

- Definition

Earnings per share.

+ References

No definition available.

+ Details

Name:	bldr_EarningsPerShareLineItems
Namespace Prefix:	bldr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were included in the computation of diluted EPS or EPU because to do so would decrease EPS or EPU amounts or increase loss per share or unit amounts for the period presented.

+ References

No definition available.

+ Details

Name:	bldr_SecuritiesIncludedInComputationOfDilutedEarningsPerShare
Namespace Prefix:	bldr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: