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v3.20.2

Leases Textual (Details) $ in Millions | May 30, 2020 USD ($)
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Leases [Abstract] |
Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount | $ 5.7

X
- Definition Lessee, Operating Lease, Lease Not Yet Commenced, Undiscounted Amount + References No definition available. + Details
Name: | apog_LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount
Namespace Prefix: | apog_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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