| Document and Entity Information | Aug. 13, 2019 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 13, 2019 |
| Entity Registrant Name | LIBERTY LATIN AMERICA LTD. |
| Entity Central Index Key | 0001712184 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | D0 |
| Entity File Number | 001-38335 |
| Entity Tax Identification Number | 98-1386359 |
| Entity Address, Address Line One | Clarendon House |
| Entity Address, Address Line Two | 2 Church Street |
| Entity Address, City or Town | Hamilton |
| Entity Address, Postal Zip Code | HM 11 |
| Entity Address, Country | BM |
| City Area Code | 303 |
| Local Phone Number | 925-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Class A | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A Shares, par value $0.01 per share |
| Trading Symbol | LILA |
| Security Exchange Name | NASDAQ |
| Class C | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class C Shares, par value $0.01 per share |
| Trading Symbol | LILAK |
| Security Exchange Name | NASDAQ |
