| Component: (Network and Table) | |
|---|---|
| Network | 2405402 - Disclosure - Property, Plant and Equipment (Details) (http://atkore.com/role/PropertyPlantAndEquipmentDetails) |
| Table | Property, Plant and Equipment [Table] |
| Reporting Entity [Axis] | 0001666138 (http://www.sec.gov/CIK) |
| Property, Plant and Equipment [Line Items] | Period [Axis] | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-09-30 | 2015-09-25 | |||||||||||
| Property, Plant and Equipment, Type [Axis] | Property, Plant and Equipment, Type [Axis] | |||||||||||
| Land | Buildings and related improvements | Machinery and equipment | Leasehold improvements | Construction in progress | Property, Plant and Equipment, Type [Domain] | Land | Buildings and related improvements | Machinery and equipment | Leasehold improvements | Construction in progress | Property, Plant and Equipment, Type [Domain] | |
Property, plant and equipment | ||||||||||||
Accumulated depreciation | ( | ( | ||||||||||
Property, plant and equipment, net | 202,692,000 | 224,284,000 | ||||||||||