XML 106 R86.htm IDEA: XBRL DOCUMENT
v3.20.2

Restructuring Activities - Restructuring Liability Activities (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Jun. 30, 2018
Fiscal 2020 Restructuring Plan [Member] | Employee Severance and Benefits [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Additional accruals | $ 25.1 |  |
Cash payments | (19.0) |  |
Ending Balance | 6.1 |  |
Fiscal 2019 Retructucturing Plan [Member] | Employee Severance and Benefits [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Beginning Balance | 5.2 |  |
Additional accruals | 7.9 | $ 17.7 |
Cash payments | $ (13.1) | (12.5) |
Ending Balance |  | 5.2 |
November 2017 and April 2018 Restructuring Plan [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Beginning Balance |  | 2.3 |
Additional accruals |  | 0.2 | $ 12.0
Cash payments |  | (2.5) | (9.0)
Ending Balance |  |  | 2.3
Non-cash settlements |  |  | (0.7)
November 2017 and April 2018 Restructuring Plan [Member] | Employee Severance and Benefits [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Beginning Balance |  | 2.2 |
Additional accruals |  | 0.2 | 11.0
Cash payments |  | (2.4) | (8.8)
Ending Balance |  |  | 2.2
November 2017 and April 2018 Restructuring Plan [Member] | Facility Consolidation and Related Charges [Member] |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |
Beginning Balance |  | 0.1 |
Additional accruals |  |  | 1.0
Cash payments |  | $ (0.1) | (0.2)
Ending Balance |  |  | 0.1
Non-cash settlements |  |  | $ (0.7)

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585 + Details
Name: | us-gaap_PaymentsForRestructuring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
Name: | us-gaap_RestructuringReserveAccrualAdjustment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of decrease in the reserve for full or partial settlement through consideration other than cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
Name: | us-gaap_RestructuringReserveSettledWithoutCash2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=syna_FiscalTwoThousandTwentyRestructuringPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=syna_EmployeeSeveranceAndBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=syna_FiscalTwoThousandNineteenRetructucturingPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringPlanAxis=syna_NovemberTwoThousandSeventeenAndAprilTwoThousandEighteenRestructuringPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=syna_FacilityConsolidationAndRelatedChargesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |