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Component: (Network and Table)
Network
172 - Disclosure - Income Taxes (Details 3)
(http://www.beaconroofingsupply.com/role/IncomeTaxesDetails3)
TableStatement [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001124941 (http://www.sec.gov/CIK)
Class of Stock [Axis]Class of Stock [Domain]
Income Tax Contingency [Line Items]Period [Axis]
2015-10-01 - 2016-09-30
2014-10-01 - 2015-09-30
Balance, beginning of year
82,000  
82,000  
Current year uncertain tax positions
0  
0  
Settlements
(82,000) 
0  
Balance, end of year
0  
 
82,000