Name:	bldr_ShareBasedCompensationArrangementByShareBasedPaymentAwardDecreaseToSharesEarnedTotalShareholderReturnModifier
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Data Type:	num:percentItemType
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The potential percentage increase to the number of restricted stock units granted which will convert to common shares upon satisfaction of the award's vesting conditions.

No definition available.

Name:	bldr_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseToSharesEarnedTotalShareholderReturnModifier
Namespace Prefix:	bldr_
Data Type:	num:percentItemType
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The percentage of restricted stock units granted which will convert to common shares upon satisfaction of the award's vesting conditions.

No definition available.

Name:	bldr_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfRestrictedStockUnitsVested
Namespace Prefix:	bldr_
Data Type:	num:percentItemType
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Data Type:	xbrli:durationItemType
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Data Type:	xbrli:sharesItemType
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

Percentage of vesting of award under share-based payment arrangement.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_AwardTypeAxis=bldr_TimeBasedRestrictedStockUnitGrantsMember
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Name:	us-gaap_PlanNameAxis=bldr_TwoThousandFourteenIncentivePlanMember
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Name:	us-gaap_VestingAxis=bldr_ShareBasedCompensationAwardVestingOverThreeYearsMember
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Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
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Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
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Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheThreeMember
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Data Type:	na
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Name:	us-gaap_VestingAxis=bldr_ShareBasedCompensationAwardVestingOnSecondAnniversaryMember
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Name:	us-gaap_AwardTypeAxis=bldr_PerformanceAndServiceConditionBasedRestrictedStockUnitGrantsMember
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Name:	srt_RangeAxis=srt_MinimumMember
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Name:	srt_RangeAxis=srt_MaximumMember
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