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v3.22.2

Subsequent Events (Details) - USD ($) | Jul. 26, 2022 | Dec. 31, 2022 | Jul. 25, 2022 | Jul. 19, 2022 | Sep. 30, 2021 | Feb. 22, 2021 | Feb. 21, 2021 | Jul. 31, 2018 | Dec. 23, 2016
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Amended facility | Subsequent event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, credit exposure threshold | $ 0 |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Maximum aggregate principal commitment |  |  |  |  |  |  |  |  | $ 300,000,000
Revolving credit facility | Amended facility |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Maximum aggregate principal commitment |  |  |  |  | $ 250,000,000 | $ 300,000,000 | $ 350,000,000 | $ 350,000,000 |
Revolving credit facility | Amended facility | Forecast |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Maximum aggregate principal commitment |  | $ 150,000,000 |  |  |  |  |  |  |
Revolving credit facility | Amended facility | Subsequent event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Maximum aggregate principal commitment | 200,000,000 |  | $ 250,000,000 |  |  |  |  |  |
Reduction in maximum borrowing capacity in event of certain asset sales |  |  |  | $ 50,000,000 |  |  |  |  |
Letter of Credit | Amended facility | Subsequent event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, credit exposure threshold | $ 5,000,000 |  |  |  |  |  |  |  |

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- Definition Line Of Credit Facility, Credit Exposure Threshold + References No definition available. + Details
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Namespace Prefix: | mygn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Line Of Credit Facility, Reduction In Maximum Borrowing Capacity In Event Of Asset Sales + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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