| **Stock-Based Compensation (Unrecognized Compensation Expense) (Details) $ in Millions** | 9 Months Ended           |
|------------------------------------------------------------------------------------------|--------------------------|
||
| Stock options                                                                            |                     |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**       |                     |
| Unrecognized Compensation Expense                                                        | $ 3.3                    |
| Weighted Average Years Expense To Be Recognized Over                                     | 1 year 8 months 24 days  |
| Restricted stock units                                                                   |                     |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**       |                     |
| Unrecognized Compensation Expense                                                        | $ 5.6                    |
| Weighted Average Years Expense To Be Recognized Over                                     | 1 year 11 months 29 days |
| Performance stock units                                                                  |                     |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**       |                     |
| Unrecognized Compensation Expense                                                        | $ 12.5                   |
| Weighted Average Years Expense To Be Recognized Over                                     | 1 year 9 months 7 days   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Unrecognized cost of unvested share-based compensation awards.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901
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| 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.
+ Details**Name:**us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------|
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| X                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------|
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