Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] | |||
| Income tax benefit | $ 0.0 | $ 0.0 | $ (3.0) |
| EMEA and Pacific Rim Business [Member] | |||
| Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] | |||
| Income tax benefit | (2.0) | ||
| Armstrong Flooring Inc [Member] | |||
| Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] | |||
| Income tax benefit | $ (1.0) | ||