| **Goodwill and Identifiable Intangibles Acquired Finite-Lived Intangibles Esselte (Details) - Esselte Acquisition - USD ($) $ in Millions** | 12 Months Ended |         |
|---------------------------------------------------------------------------------------------------------------------------------------------|-----------------|---------|
||
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Identifiable intangibles                                                                                                                    |            | $ 277.0 |
| Trade names                                                                                                                                 |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Identifiable intangibles                                                                                                                    |            | 53.2    |
| Customer relationships                                                                                                                      |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Identifiable intangibles                                                                                                                    |            | 102.4   |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 15 years        |    |
| Patents                                                                                                                                     |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Identifiable intangibles                                                                                                                    |            | 4.6     |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 10 years        |    |
| Trade names                                                                                                                                 |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Indefinite-Lived Intangible                                                                                                                 |            | $ 116.8 |
| Minimum                                                                                                                                     |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 10 years        |    |
| Minimum | Trade names                                                                                                                       |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 15 years        |    |
| Maximum                                                                                                                                     |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 30 years        |    |
| Maximum | Trade names                                                                                                                       |            |    |
| **Acquired Finite-Lived Intangible Assets [Line Items]**                                                                                    |            |    |
| Finite-Lived Intangible Asset, Useful Life                                                                                                  | 30 years        |    |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of intangible assets, excluding goodwill, acquired at the acquisition date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of identifiable intangible assets recognized as of the acquisition date.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472
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| X                                                                                                                                                                                                                                                                                                                                                                                                          |
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| - Definition
Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
No definition available.
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| X                                                                                                                                                        |
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