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Overview (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
Jun. 30, 2019
Nov. 01, 2018
Organization, Consolidation and Presentation of Financial Statements [Line Items]    
Reverse terminantion fee $ 98.0  
Illumina, FC Ops Corp [Member] | Pacific Biosciences of California, Inc. [Member]    
Organization, Consolidation and Presentation of Financial Statements [Line Items]    
Purchase price, per share amount   $ 8.00