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Deferred Compensation Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred Compensation Liability, Current and Noncurrent	$ 65,400,000	$ 61,800,000
Nonqualified Deferred Compensation Plan [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Maximum employee contributions from base salary, percentage	75.00%
Maximum employee contributions from annual bonus, percentage	100.00%
Employee contributions vested, percentage	100.00%
Compensation expense for the DCP discretionary contributions	$ 3,900,000	4,000,000	$ 3,200,000
Investment in group life insurance contracts	$ 56,100,000	$ 49,200,000
Percent vested annually	33.33%
Nonqualified Deferred Compensation Plan [Member] | One Third Annually [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions, vesting period, years	3 years

X

- Definition

Employee contributions vested, percentage.

+ References

No definition available.

+ Details

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X

- Definition

Employer Contributions, Percent Vested Annually

+ References

No definition available.

+ Details

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Data Type:	dtr-types1:percentItemType
Balance Type:	na
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X

- Definition

The vesting period for discretionary employer contributions, which vest ratably on an annual basis.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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Period Type:	duration

X

- Definition

Cash surrender value of group life insurance contracts at the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

Maximum employee contributions from annual bonus percentage to dcp.

+ References

No definition available.

+ Details

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X

- Definition

Maximum employee contributions from base salary percentage to dcp.

+ References

No definition available.

+ Details

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Namespace Prefix:	holx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Nonqualified deferred compensation plan annual contribution.

+ References

No definition available.

+ Details

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Namespace Prefix:	holx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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X

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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