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Accumulated Other Comprehensive Earnings (Loss) (Table 2) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive loss, pre-tax amount $ (1,028.2) $ 1,946.4 $ (1,269.6)
Other comprehensive loss, tax benefit (expense) 4.2 (1.6) (1.8)
Other comprehensive earnings (loss) (1,024.0) 1,944.8 (1,271.4)
Other comprehensive earnings (loss) attributable to noncontrolling interests (0.3) (1.9) 3.1
Other comprehensive earnings (loss) attributable to noncontrolling interests, tax 0.1 0.2 0.0
Other comprehensive earnings (loss) attributable to noncontrolling interests, net (0.2) (1.7) 3.1
Other comprehensive earnings attributable to Liberty Latin America shareholders, pre-tax (1,028.5) 1,944.5 (1,266.5)
Other comprehensive earnings attributable to Liberty Latin America shareholders, tax 4.3 (1.4) (1.8)
Other comprehensive earnings attributable to Liberty Latin America shareholders, net (1,024.2) 1,943.1 (1,268.3)
Total - continuing operations      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive loss, pre-tax amount (922.3) 1,916.3 (1,194.8)
Other comprehensive loss, tax benefit (expense) 4.4 (1.9) (3.2)
Other comprehensive earnings (loss) (917.9) 1,914.4 (1,198.0)
Discontinued Operations      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive loss, pre-tax amount (105.9) 30.1 (74.8)
Other comprehensive loss, tax benefit (expense) (0.2) 0.3 1.4
Other comprehensive earnings (loss) (106.1) 30.4 (73.4)
Foreign currency translation adjustments      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive loss, pre-tax amount (897.9) 1,898.7 (1,193.9)
Other comprehensive loss, tax benefit (expense) 0.0 0.0 (1.7)
Other comprehensive earnings (loss) (897.9) 1,898.7 (1,195.6)
Pension-related adjustments and other      
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Other comprehensive loss, pre-tax amount (24.4) 17.6 (0.9)
Other comprehensive loss, tax benefit (expense) 4.4 (1.9) (1.5)
Other comprehensive earnings (loss) $ (20.0) $ 15.7 $ (2.4)