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Fair Value Measurements - Additional Information (Details)	3 Months Ended
	Feb. 28, 2021 USD ($)
Fair Value Disclosures [Abstract]
Cash equivalents maximum maturity period	3 months
Transfers between fair value measurement category levels	$ 0

X

- Definition

Cash equivalents maximum maturity period new.

+ References

No definition available.

+ Details

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Namespace Prefix:	snx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Transfers between fair value measurement category levels.

+ References

No definition available.

+ Details

Name:	snx_TransfersBetweenFairValueMeasurementCategoryLevels
Namespace Prefix:	snx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration