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Significant Accounting Policies - Acquired intangibles (Details)
12 Months Ended
Dec. 31, 2019
Minimum  
Finite Lived Intangible Assets  
Intangible assets useful life 4 years
Minimum | Customer related intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 12 years
Minimum | Patents  
Finite Lived Intangible Assets  
Intangible assets useful life 6 years
Minimum | Other technology-based intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 6 years
Minimum | Definite-lived tradenames  
Finite Lived Intangible Assets  
Intangible assets useful life 6 years
Minimum | Other amortizable intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 5 years
Maximum  
Finite Lived Intangible Assets  
Intangible assets useful life 20 years
Maximum | Customer related intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 19 years
Maximum | Patents  
Finite Lived Intangible Assets  
Intangible assets useful life 17 years
Maximum | Other technology-based intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 15 years
Maximum | Definite-lived tradenames  
Finite Lived Intangible Assets  
Intangible assets useful life 20 years
Maximum | Other amortizable intangible assets  
Finite Lived Intangible Assets  
Intangible assets useful life 13 years