XML 43 R30.htm IDEA: XBRL DOCUMENT
v3.25.1

Inventory (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 29, 2025 | Mar. 30, 2024
Inventory Disclosure [Abstract] |  |
Inventory adjustments, refund | $ 2.4 | $ 16.9
Inventory adjustments, refund, interest | $ 0.5 | $ 2.0

X
- Definition Inventory Adjustments, Refund + References No definition available. + Details
Name: | bxc_InventoryAdjustmentsRefund
Namespace Prefix: | bxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Inventory Adjustments, Refund, Interest + References No definition available. + Details
Name: | bxc_InventoryAdjustmentsRefundInterest
Namespace Prefix: | bxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration