Business Combination, Measurement Input

No definition available.

Name:	lila_BusinessCombinationMeasurementInput
Namespace Prefix:	lila_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Measurement Input, Tenor Period

+ References

No definition available.

+ Details

Name:	lila_DebtInstrumentMeasurementInputTenorPeriod
Namespace Prefix:	lila_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Intangible Asset, Measurement Input

+ References

No definition available.

+ Details

Name:	lila_IntangibleAssetMeasurementInput
Namespace Prefix:	lila_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Investments Available-for-sale, Fair Value Disclosure

+ References

No definition available.

+ Details

Name:	lila_InvestmentsAvailableforsaleFairValueDisclosure
Namespace Prefix:	lila_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMeasurementInput
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

Fair Value Measurements (Details) $ in Millions	12 Months Ended
Fair Value Measurements (Details) $ in Millions	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Level 3 \| Nonrecurring \| Liberty Puerto Rico and Certain C&W Reporting Units \| Minimum \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles			0.08
Level 3 \| Nonrecurring \| Liberty Puerto Rico and Certain C&W Reporting Units \| Maximum \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles			0.10
Level 3 \| Nonrecurring \| Liberty Puerto Rico \| Franchise Rights \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles			0.09
Level 3 \| Nonrecurring \| Cabletica \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles	0.14
Level 3 \| Nonrecurring \| C&W \| Minimum \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles			0.09
Level 3 \| Nonrecurring \| C&W \| Maximum \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Discount rate on valuation intangibles			0.12
Level 3 \| Derivative Financial Instruments, Liabilities \| Sable Currency Swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative instrument liability	$ (30)	$ (36)
Net gains (losses) included in earnings	6	(14)	$ (11)
Level 1 \| Reported Value Measurement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments measured at fair value	$ 37	$ 35
Valuation Technique, Discounted Cash Flow
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Tenor period	5 years
Valuation Technique, Discounted Cash Flow \| Measurement Input, Credit Spread
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, measurement input	0.067
Customer relationships \| Nonrecurring \| UTS Acquisition \| Discount Rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Measurement input	0.14