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Data Type:	xbrli:integerItemType
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Represent percentage of principal for repurchase price.

No definition available.

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Data Type:	xbrli:pureItemType
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Period Type:	duration

Represents the number of business days immediately after any ten consecutive trading day period during the debt instrument measurement period.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
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Represents the number of consecutive trading days prior to the five business days during the debt instrument measurement period.

No definition available.

Name:	tdoc_DebtInstrumentConversionObligationPeriodOfConsecutiveTradingDays
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Data Type:	xbrli:integerItemType
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The price per share of the conversion feature embedded in the debt instrument with each unit of reference property price in cash.

No definition available.

Name:	tdoc_DebtInstrumentConvertibleConversionReferencePropertyPrice
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Data Type:	num:perShareItemType
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Period Type:	duration

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount for each unit of reference property.

No definition available.

Name:	tdoc_DebtInstrumentConvertibleConversionReferencePropertyRatio
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Data Type:	xbrli:pureItemType
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The principal multiple amount used in the conversion of the debt instrument.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Represents the trading price expressed as a percentage of the last reported sales price and conversion rate after the specified consecutive trading day period.

No definition available.

Name:	tdoc_DebtInstrumentTradingPriceAsPercentageOfLastReportedSalesPriceAndConversionRate
Namespace Prefix:	tdoc_
Data Type:	num:percentItemType
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Period Type:	duration

Aggregate number of common shares reserved for future issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Data Type:	xbrli:sharesItemType
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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The price per share of the conversion feature embedded in the debt instrument.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

No definition available.

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Data Type:	xbrli:integerItemType
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Period Type:	duration

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

No definition available.

Name:	us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

No definition available.

Name:	us-gaap_DebtInstrumentConvertibleThresholdTradingDays
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Data Type:	xbrli:integerItemType
Balance Type:	na
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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Namespace Prefix:
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Name:	us-gaap_DebtInstrumentAxis=tdoc_ConvertibleSeniorNotesDue2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_DebtInstrumentAxis=tdoc_ConvertibleSeniorNotesDueJune2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_DebtInstrumentAxis=tdoc_ConvertibleSeniorNotesDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleNotesPayableMember
Namespace Prefix:
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