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v3.20.2

SUBSEQUENT EVENT (Details) $ in Millions | Jul. 01, 2020 USD ($)
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Subsequent event | InTouch Health |
Subsequent Event [Line Items] |
Gain on investment | $ 45

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- Definition Equity Method Investment, Gain on Investment + References No definition available. + Details
Name: | isrg_EquityMethodInvestmentGainOnInvestment
Namespace Prefix: | isrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=isrg_InTouchHealthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |