Additional basis points on discount rate used to calculate redemption premium on debt instrument.

No definition available.

Name:	lila_DebtInstrumentAdditionalBasisPointsonDiscountRateUsedtoCalculateRedemptionPremium
Namespace Prefix:	lila_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The issue price of the debt instrument, expressed as a percentage of the principal amount.

+ References

No definition available.

+ Details

Name:	lila_DebtInstrumentOriginalIssuePricePercentage
Namespace Prefix:	lila_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Maximum

+ References

No definition available.

+ Details

Name:	lila_DebtInstrumentRedemptionPricePercentageofPrincipalAmountRedeemedMaximum
Namespace Prefix:	lila_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

Name:	us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

+ Details

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_ExtinguishmentOfDebtAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ExtinguishmentOfDebtAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_A2022CWSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_CWSeniorNotesDue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_CWSeniorNotesDue2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_CWTermLoanB4FacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_CWNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_A2027CWSeniorNotesAddonBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_A2026CWSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=us-gaap_DebtInstrumentRedemptionPeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lila_DebtInstrumentRedemptionPeriodSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lila_DebtInstrumentRedemptionPeriodSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=lila_DebtInstrumentRedemptionPeriodEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_A2027CWSeniorSecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_ColumbusSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=lila_A2027CWSeniorNotesAddonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt and Finance Lease Obligations - C&W Notes (Details) £ in Millions	1 Months Ended								6 Months Ended	12 Months Ended
	Oct. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 GBP (£)	Nov. 30, 2018 USD ($)	Oct. 31, 2018 USD ($)	Oct. 31, 2018 GBP (£)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2019 GBP (£)	Oct. 31, 2018 GBP (£)
Debt Instrument [Line Items]
Outstanding principal amount										$ 8,512,500,000	$ 6,710,700,000
Carrying value										8,366,400,000	6,669,200,000
Loss on debt modification and extinguishment, net										19,800,000	32,100,000	$ 51,800,000
Percent of principal amount redeemable	40.00%
Line of Credit
Debt Instrument [Line Items]
Extinguishment of debt	$ 923,000,000
Loss on debt modification and extinguishment, net	$ 7,000,000		$ 4,000,000
Senior Notes
Debt Instrument [Line Items]
Loss on debt modification and extinguishment, net			6,000,000						$ 13,000,000
Sable Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Extinguishment of debt		$ 210,000,000	150,000,000
Loss on debt modification and extinguishment, net			$ 4,000,000			$ 11,000,000
Redemption price		103.438%	105.156%
Sable Senior Notes \| Senior Notes \| 2022
Debt Instrument [Line Items]
Extinguishment of debt			$ 115,000,000
2027 C&W Senior Notes \| Line of Credit
Debt Instrument [Line Items]
Extinguishment of debt			170,000,000
2019 C&W Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Extinguishment of debt				$ 120,000,000	£ 91
Debt interest expense				$ 9,000,000	£ 7
C&W Term Loan B-4 Facility \| Line of Credit
Debt Instrument [Line Items]
Extinguishment of debt			$ 235,000,000
Senior Notes
Debt Instrument [Line Items]
Redemption price							103.00%	103.00%
Percent of principal amount redeemable									40.00%				40.00%
Senior Notes \| C&W Notes
Debt Instrument [Line Items]
Outstanding principal amount										2,120,000,000.0	$ 1,781,600,000
Estimated fair value										2,270,900,000
Carrying value										$ 2,102,600,000
Senior Notes \| Sable Senior Notes
Debt Instrument [Line Items]
Stated interest rate of debt			6.875%
Repurchased face amount						275,000,000
Repurchase amount						$ 294,000,000
Senior Notes \| 2027 C&W Senior Notes Add-on B
Debt Instrument [Line Items]
Original issue amount		$ 220,000,000
Original issue price		103.625%
Senior Notes \| 2026 C&W Senior Notes
Debt Instrument [Line Items]
Stated interest rate of debt										7.50%
Outstanding principal amount										$ 500,000,000.0
Estimated fair value										542,500,000
Carrying value										$ 493,900,000
Redemption price							107.50%	107.50%
Senior Notes \| 2026 C&W Senior Notes \| 2021
Debt Instrument [Line Items]
Redemption price										103.75%
Senior Notes \| 2026 C&W Senior Notes \| 2022
Debt Instrument [Line Items]
Redemption price										101.875%
Senior Notes \| 2026 C&W Senior Notes \| 2023
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2026 C&W Senior Notes \| 2024
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2026 C&W Senior Notes \| 2025 and thereafter
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2027 C&W Senior Notes
Debt Instrument [Line Items]
Stated interest rate of debt										6.875%
Outstanding principal amount										$ 1,220,000,000.0
Estimated fair value										1,305,800,000
Carrying value										$ 1,216,600,000
Percentage of principal amount, limitation on redemption (up to)			10.00%
Original issue amount			$ 400,000,000
Original issue price			99.195%
Redemption price							106.875%	106.875%	100.00%
Additional basis points used to determine redemption premium									50.00%				50.00%
Senior Notes \| 2027 C&W Senior Notes \| 2021
Debt Instrument [Line Items]
Redemption price			103.00%
Senior Notes \| 2027 C&W Senior Notes \| 2022
Debt Instrument [Line Items]
Redemption price			105.75%							103.438%
Senior Notes \| 2027 C&W Senior Notes \| 2023
Debt Instrument [Line Items]
Redemption price										101.719%
Senior Notes \| 2027 C&W Senior Notes \| 2024
Debt Instrument [Line Items]
Redemption price										100.859%
Senior Notes \| 2027 C&W Senior Notes \| 2025 and thereafter
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2027 C&W Senior Secured Notes
Debt Instrument [Line Items]
Stated interest rate of debt			5.75%
Senior Notes \| 2027 C&W Senior Secured Notes \| 2022
Debt Instrument [Line Items]
Redemption price										102.875%
Senior Notes \| 2027 C&W Senior Secured Notes \| 2023
Debt Instrument [Line Items]
Redemption price										101.438%
Senior Notes \| 2027 C&W Senior Secured Notes \| 2024
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2027 C&W Senior Secured Notes \| 2025 and thereafter
Debt Instrument [Line Items]
Redemption price										100.00%
Senior Notes \| 2019 C&W Senior Notes
Debt Instrument [Line Items]
Stated interest rate of debt										5.75%
Outstanding principal amount										$ 400,000,000.0
Estimated fair value										422,600,000
Carrying value										392,100,000
Percentage of principal amount, limitation on redemption (up to)							43.00%	43.00%
Repurchased face amount									$ 80,000,000				£ 63
Repurchase amount							$ 87,000,000							£ 68
Debt interest expense							$ 4,000,000	£ 3
Senior Notes \| Columbus Senior Notes
Debt Instrument [Line Items]
Extinguishment of debt										$ 1,250,000,000
Loss on debt modification and extinguishment, net									$ 24,000,000
Senior Notes \| 2027 C&W Senior Notes Add-on
Debt Instrument [Line Items]
Original issue amount			$ 300,000,000
Original issue price			99.205%