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SUBSEQUENT EVENT (Details) $ in Millions	1 Months Ended
	Jul. 19, 2019 USD ($)
Schölly Acquisition | Subsequent event
Subsequent Event [Line Items]
Cash consideration	$ 100

X

- Definition

Expected Future Payments to Acquire Businesses, Gross

+ References

No definition available.

+ Details

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Namespace Prefix:	isrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=isrg_SchllyFiberopticGmbHMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: