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Revenue Recognition Significant Judgments (Details) - USD ($) $ in Millions	Dec. 28, 2019	Dec. 29, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Refund liability, product returns	$ 55.2	$ 53.9
Refund liability, other credits and incentives	$ 134.0	$ 97.7

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- Definition

Refund liability, other credits and incentives

+ References

No definition available.

+ Details

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X

- Definition

Refund liability, product returns

+ References

No definition available.

+ Details

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Namespace Prefix:	irbt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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