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v3.7.0.1

Guarantees (Narrative) (Details) | 12 Months Ended
--- | ---
Jun. 30, 2017 USD ($)
Schedule of Fiscal Years [Line Items] |
intellectual property indemnification obligations | $ 0
intellectual property indemnification obligations | $ 0
Minimum [Member] |
Schedule of Fiscal Years [Line Items] |
Product warranty period term (in years) | 1 year
Maximum [Member] |
Schedule of Fiscal Years [Line Items] |
Product warranty period term (in years) | 5 years

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- Definition Indemnifications obligations to Officers and Directors + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition intellectual property indemnification obligations + References No definition available. + Details
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Period Type: | instant

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- Definition Represents the product warranty term. + References No definition available. + Details
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Namespace Prefix: | stx_
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Balance Type: | na
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- Definition [Line Items] for Schedule of Fiscal Years [Table] + References No definition available. + Details
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Namespace Prefix: | stx_
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Balance Type: | na
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |