Rendering

Component: (Network and Table)
Network
039 - Disclosure - Summary of Significant Accounting Policies (Detail)
(http://www.beaconroofingsupply.com/role/DisclosureSummaryOfSignificantAccountingPolicies)
TableSchedule of Property, Plant and Equipment [Table]
Slicers (applies to each fact value in each table cell)
Property, Plant and Equipment [Line Items]Range [Axis]
Maximum [Member]Minimum [Member]Range [Domain]
Property, Plant and Equipment By Type [Axis]Property, Plant and Equipment By Type [Axis]Property, Plant and Equipment By Type [Axis]
Buildings and ImprovementsEquipmentFurniture and FixturesBuildings and ImprovementsEquipmentFurniture and FixturesLeasehold Improvements
Estimated useful life, minimum
P40Y 
P10Y 
P10Y 
P10Y 
P3Y 
P5Y 
 
Estimated useful life
 
 
 
 
 
 
Shorter of the estimated useful life or the term of the lease, considering renewal options expected to be exercised.