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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
Aug. 06, 2020
Oct. 22, 2019
Jun. 19, 2019
Sep. 19, 2016
Dec. 31, 2020
Loss Contingencies [Line Items]          
Availability under senior revolving credit facility         $ 15.0
Outstanding guarantees and letters of credit         9.7
Guarantees related subsidiaries' finance lease obligations, and line of credit         0.9
Fairchild          
Loss Contingencies [Line Items]          
Maximum remediation cost recoveries receivable         150.0
Power Integrations, Inc.          
Loss Contingencies [Line Items]          
Cash paid for legal settlements   $ 175.0      
AcBel Polytech, Inc.          
Loss Contingencies [Line Items]          
Cash paid for legal settlements $ 6.0        
Letter of Credit | Senior Revolving Credit Facility          
Loss Contingencies [Line Items]          
Credit commitment outstanding         $ 0.9
Fairchild          
Loss Contingencies [Line Items]          
Business acquisition, maximum indemnification period       6 years  
Quantenna          
Loss Contingencies [Line Items]          
Business acquisition, maximum indemnification period     6 years