Debt instrument issue price.

No definition available.

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Namespace Prefix:	bldr_
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Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
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-Section S99
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Cost basis for treasury stock acquired for purposes other than retirement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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+ Details

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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=bldr_TwoThousandTwentySixRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	Jan. 21, 2022	Jan. 12, 2022	Feb. 18, 2022	Feb. 04, 2022	Dec. 31, 2021	Jul. 23, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Debt instrument carrying amount					$ 2,957,282,000		$ 1,642,445,000
2032 Notes
Subsequent Event [Line Items]
Debt instrument carrying amount					1,000,000,000	$ 1,000,000,000.0
2026 Revolving Credit Facility
Subsequent Event [Line Items]
Debt instrument carrying amount					588,000,000		$ 75,000,000
Line of credit facility maximum borrowing capacity					$ 1,400,000,000
Subsequent Event \| Company Shares Repurchases
Subsequent Event [Line Items]
Share repurchase authorizations amount		$ 2,000,000,000.0	$ 1,000,000,000.0
Number of shares repurchased and retired		3.1
Common stock, average price		$ 81.35
Common stock amount including fees		$ 252,700,000
Subsequent Event \| 2032 Notes
Subsequent Event [Line Items]
Debt instrument carrying amount	$ 300,000,000.0
Net percentage of proceeds from debt issuance	100.50%
Subsequent Event \| 2026 Revolving Credit Facility
Subsequent Event [Line Items]
Debt instrument carrying amount	$ 400,000,000.0
Line of credit facility maximum borrowing capacity	$ 1,800,000,000			$ 1,800,000,000