| Component: (Network and Table) | |
|---|---|
| Network | 100460 - Disclosure - Other Non-Current Assets (Tables) (http://www.armstrong.com/20161231/taxonomy/role/DisclosureOtherNonCurrentAssetsTables) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000007431 (http://www.sec.gov/CIK) |
| Other Assets Noncurrent Disclosure [Abstract] | Period [Axis] | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2016-01-01 - 2016-12-31 | ||||||||||||||||||||||||||||||||||||||||||||||
Other Assets Noncurrent Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
Schedule Of Other Non-Current Assets |
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