Legal Proceedings Legal Proceedings (Details) - Germany - Lufthansa Technik AG $ in Millions  | 
1 Months Ended | 9 Months Ended | 
|---|---|---|
| 
 Oct. 31, 2018  
USD ($) 
 | 
 Sep. 29, 2018  
USD ($)  
product 
 | 
|
| Loss Contingencies [Line Items] | ||
| Number of products in distribution channels | product | 0 | |
| Patent Infringement | AES | ||
| Loss Contingencies [Line Items] | ||
| Damages sought | $ 6.2 | |
| Recorded reserve | 1.0 | |
| Patent Infringement | AES | Subsequent Event | ||
| Loss Contingencies [Line Items] | ||
| Damages sought | $ 6.4 | |
| Patent Infringement | AES | Minimum | ||
| Loss Contingencies [Line Items] | ||
| Estimate of the value of the dispute | 1.0 | |
| Patent Infringement | AES | Maximum | ||
| Loss Contingencies [Line Items] | ||
| Estimate of the value of the dispute | $ 3.0 | 
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- 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. No definition available. 
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- Definition Amount of loss contingency liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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