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Income Taxes - Rollforward of Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Jan. 01, 2023
Deferred Tax Valuation Allowance [Roll Forward]
Beginning Balance	$ 274.7	$ 251.3	$ 2.3
Additions Due to Current Year Acquisitions	0.0	0.0	223.5
Additions Charged to (Benefit From) Provision for Income Taxes	31.3	10.4	26.2
Currency Translation/Other	(163.6)	13.0	(0.7)
Ending Balance	$ 142.4	$ 274.7	$ 251.3

X

- Definition

Deferred Tax Valuation Allowance

+ References

No definition available.

+ Details

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Namespace Prefix:	qdel_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Valuation Allowance, Deferred Tax Asset, Additions From Acquisitions, Amount

+ References

No definition available.

+ Details

Name:	qdel_ValuationAllowanceDeferredTaxAssetAdditionsFromAcquisitionsAmount
Namespace Prefix:	qdel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Valuation Allowance, Deferred Tax Asset, Increase (Decrease) From Foreign Currency Translation And Other, Amount

+ References

No definition available.

+ Details

Name:	qdel_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseFromForeignCurrencyTranslationAndOtherAmount
Namespace Prefix:	qdel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	duration