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Overview (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 03, 2020 | Nov. 01, 2019 | Oct. 01, 2019 | Sep. 30, 2019 | Mar. 02, 2020 | Jan. 02, 2020 | Dec. 02, 2019 | Nov. 01, 2018
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |
Reverse terminantion fee |  |  |  | $ 98.0 |  |  |  |
Period in which company must repay continuation advances if change-of-controll transaction is entered into with third party |  |  |  | 2 years |  |  |  |
Equity or debt financing that must be raised in a single transaction |  |  |  | $ 100.0 |  |  |  |
Possible termination fee |  |  |  | $ 43.0 |  |  |  |
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
Payments due for merger |  |  | $ 6.0 |  |  |  |  |
Merger payments made |  |  | $ 6.0 |  |  |  |  |
Illumina, FC Ops Corp [Member] | Pacific Biosciences of California, Inc. [Member] | Forecast [Member] |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |
Payments due for merger |  |  |  |  | $ 6.0 | $ 6.0 | $ 6.0 |
Merger payments made | $ 22.0 |  |  |  |  |  |  |
Subsequent Event [Member] | Illumina, FC Ops Corp [Member] | Pacific Biosciences of California, Inc. [Member] |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |  |  |  |  |  |  |
Payments due for merger |  | $ 6.0 |  |  |  |  |  |
Merger payments made |  | $ 6.0 |  |  |  |  |  |

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