Line of Credit Facility, Additional Maximum Borrowing Capacity

No definition available.

Name:	nflx_LineofCreditFacilityAdditionalMaximumBorrowingCapacity
Namespace Prefix:	nflx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=nflx_FederalFundsRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=nflx_OneMonthLIBORRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term Debt (Revolving Credit Facility) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Jul. 31, 2017
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 500,000,000.0
Line of credit facility, additional maximum borrowing capacity		$ 250,000,000.0
Commitment fee percentage	0.10%
London Interbank Offered Rate (LIBOR) [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.75%
Federal Funds Rate [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
One-Month LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.00%
One-Month LIBOR Rate [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%