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Income Taxes - Summary of Origination and Changes in Deferred Tax Assets and Liabilities (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Income Taxes [Line Items]      
Movements, Recognized in profit or loss $ (553,225,000)    
Movements, Recognized in comprehensive income 192,933,000 $ 61,038,000 $ (1,394,000)
Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (113,033,000) (254,940,000)  
Movements, Recognized in profit or loss 408,076,000 232,755,000  
Movements, Recognized in comprehensive income 193,778,000 60,144,000  
Movements, Acquisitions   60,358,000  
Movements, Foreign currency translation difference 61,944,000 128,374,000  
Movements, Other increases (decreases) (106,385,000) (42,917,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance 444,380,000 (113,033,000) (254,940,000)
Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   (296,807,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance     (296,807,000)
Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (113,033,000) (551,747,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (113,033,000) (551,747,000)
Accumulated Depreciation [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (349,781,000) (332,221,000)  
Movements, Recognized in profit or loss (38,520,000) (25,314)  
Movements, Foreign currency translation difference 82,756,000 27,654,000  
Movements, Other increases (decreases) (176,968,000) (19,926,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance (482,513,000) (349,781,000) (332,221,000)
Accumulated Depreciation [Member] | Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   26,000  
Deferred Taxes Assets/(Liabilities), Net ending balance     26,000
Accumulated Depreciation [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (349,781,000) (332,195,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (349,781,000) (332,195,000)
Accumulated Amortization [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (17,194,000) (20,766,000)  
Movements, Recognized in profit or loss 119,000 145  
Movements, Foreign currency translation difference (308,000) 2,937,000  
Movements, Other increases (decreases) 1,328,000 490,000  
Deferred Taxes Assets/(Liabilities), Net ending balance (16,055,000) (17,194,000) (20,766,000)
Accumulated Amortization [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (17,194,000) (20,766,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (17,194,000) (20,766,000)
Post-Employment Benefit Obligations [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 373,951,000 83,769,000  
Movements, Recognized in profit or loss (1,962,000) 1,362  
Movements, Recognized in comprehensive income 195,098,000 59,036,000  
Movements, Acquisitions   262,299,000  
Movements, Foreign currency translation difference (17,182,000) (31,463,000)  
Movements, Other increases (decreases) 2,701,000 (1,052,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance 552,606,000 373,951,000 83,769,000
Post-Employment Benefit Obligations [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 373,951,000 83,769,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   373,951,000 83,769,000
Revaluation of Financial Instruments [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (5,074,000) 3,278,000  
Movements, Recognized in profit or loss 1,339,000 (8,149)  
Movements, Recognized in comprehensive income (1,320,000) 1,103,000  
Movements, Foreign currency translation difference (162,000) (85,000)  
Movements, Other increases (decreases) (5,198,000) (1,221,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance (10,415,000) (5,074,000) 3,278,000
Revaluation of Financial Instruments [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (5,074,000) 3,278,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   (5,074,000) 3,278,000
Tax Loss [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 258,589,000    
Movements, Recognized in profit or loss 1,481,000 274,706  
Movements, Foreign currency translation difference (10,630,000) (16,117,000)  
Movements, Other increases (decreases) 31,640,000    
Deferred Taxes Assets/(Liabilities), Net ending balance 281,080,000 258,589,000  
Tax Loss [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 258,589,000    
Deferred Taxes Assets/(Liabilities), Net ending balance   258,589,000  
Provisions [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 593,249,000 144,318,000  
Movements, Recognized in profit or loss (112,506,000) 120,906  
Movements, Acquisitions   340,549,000  
Movements, Foreign currency translation difference (30,273,000) (70,557,000)  
Movements, Other increases (decreases) (50,857,000) 52,407,000  
Deferred Taxes Assets/(Liabilities), Net ending balance 399,613,000 593,249,000 144,318,000
Provisions [Member] | Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   5,626,000  
Deferred Taxes Assets/(Liabilities), Net ending balance     5,626,000
Provisions [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 593,249,000 149,944,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   593,249,000 149,944,000
Provision For Civil Contingencies [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 256,544,000 46,147,000  
Movements, Recognized in profit or loss (46,541,000) 7,183  
Movements, Acquisitions   218,400,000  
Movements, Foreign currency translation difference (11,377,000) (14,989,000)  
Movements, Other increases (decreases) 42,894,000 (197,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance 241,520,000 256,544,000 46,147,000
Provision For Civil Contingencies [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 256,544,000 46,147,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   256,544,000 46,147,000
Provision Contingencies Workers [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 32,360,000 33,669,000  
Movements, Recognized in profit or loss 146,000 (705)  
Movements, Foreign currency translation difference 116,000 (540,000)  
Movements, Other increases (decreases) 4,256,000 (64,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance 36,878,000 32,360,000 33,669,000
Provision Contingencies Workers [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 32,360,000 33,669,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   32,360,000 33,669,000
Provision For Doubtful Trade Accounts [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 235,875,000 99,420,000  
Movements, Recognized in profit or loss   111,533  
Movements, Acquisitions   34,765,000  
Movements, Foreign currency translation difference   (15,218,000)  
Movements, Other increases (decreases)   (251,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   235,875,000 99,420,000
Provision For Doubtful Trade Accounts [Member] | Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   5,626,000  
Deferred Taxes Assets/(Liabilities), Net ending balance     5,626,000
Provision For Doubtful Trade Accounts [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   105,046,000  
Deferred Taxes Assets/(Liabilities), Net ending balance     105,046,000
Provision Uncontainable Accounts [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Movements, Recognized in profit or loss 7,096,000    
Movements, Foreign currency translation difference (9,042,000)    
Movements, Other increases (decreases) (111,825,000)    
Deferred Taxes Assets/(Liabilities), Net ending balance 122,104,000    
Provision Uncontainable Accounts [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 235,875,000    
Deferred Taxes Assets/(Liabilities), Net ending balance   235,875,000  
Provision Of Human Resources Accounts [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 14,730,000 4,782,000  
Movements, Recognized in profit or loss 680,000 6,685  
Movements, Acquisitions   4,028,000  
Movements, Foreign currency translation difference (223,000) (870,000)  
Movements, Other increases (decreases) 1,152,000 105,000  
Deferred Taxes Assets/(Liabilities), Net ending balance 16,339,000 14,730,000 4,782,000
Provision Of Human Resources Accounts [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 14,730,000 4,782,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   14,730,000 4,782,000
Financial Assets Ifric 12 [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (196,683,000) (119,729,000)  
Movements, Recognized in profit or loss (36,402,000) (30,739)  
Movements, Acquisitions   (54,965,000)  
Movements, Foreign currency translation difference 12,177,000 7,689,000  
Movements, Other increases (decreases) 13,483,000 1,061,000  
Deferred Taxes Assets/(Liabilities), Net ending balance (207,425,000) (196,683,000) (119,729,000)
Financial Assets Ifric 12 [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (196,683,000) (119,729,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (196,683,000) (119,729,000)
Other Provisions [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 250,423,000 80,029,000  
Movements, Recognized in profit or loss (37,485,000) 26,949  
Movements, Acquisitions   138,321,000  
Movements, Foreign currency translation difference (21,924,000) (46,629,000)  
Movements, Other increases (decreases) (817,000) 51,753,000  
Deferred Taxes Assets/(Liabilities), Net ending balance 190,197,000 250,423,000 80,029,000
Other Provisions [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance 250,423,000 80,029,000  
Deferred Taxes Assets/(Liabilities), Net ending balance   250,423,000 80,029,000
Other [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (966,773,000) (133,318,000)  
Movements, Recognized in profit or loss 558,125,000 (130,901)  
Movements, Recognized in comprehensive income   5,000  
Movements, Acquisitions   (542,490,000)  
Movements, Foreign currency translation difference 37,743,000 216,005,000  
Movements, Other increases (decreases) 90,969,000 (73,615,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance (279,936,000) (966,773,000) (133,318,000)
Other [Member] | Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   (302,459,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance     (302,459,000)
Other [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (966,773,000) (435,777,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (966,773,000) (435,777,000)
Other Deferred Taxes [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Movements, Recognized in profit or loss (5,762,000)    
Movements, Foreign currency translation difference 23,468,000    
Movements, Other increases (decreases) 112,131,000    
Deferred Taxes Assets/(Liabilities), Net ending balance 110,510,000    
Other Deferred Taxes [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (19,327,000)    
Deferred Taxes Assets/(Liabilities), Net ending balance   (19,327,000)  
Other Deferred Taxes Net [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (19,327,000) 4,395,000  
Movements, Recognized in profit or loss   (31,488)  
Movements, Recognized in comprehensive income   5,000  
Movements, Acquisitions   74,195,000  
Movements, Foreign currency translation difference   9,466,000  
Movements, Other increases (decreases)   (75,900,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (19,327,000) 4,395,000
Other Deferred Taxes Net [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   4,395,000  
Deferred Taxes Assets/(Liabilities), Net ending balance     4,395,000
Argentina | Monetary Correction [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (265,047,000) (2,883,000)  
Movements, Recognized in profit or loss 370,000 (111,518)  
Movements, Foreign currency translation difference 629,000 151,813,000  
Movements, Other increases (decreases) (21,162,000)    
Deferred Taxes Assets/(Liabilities), Net ending balance (285,210,000) (265,047,000) (2,883,000)
Argentina | Monetary Correction [Member] | Deferred Tax Assets (Liabilities) [Member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance   (302,459,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance     (302,459,000)
Argentina | Monetary Correction [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (265,047,000) (305,342,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   (265,047,000) (305,342,000)
Enel Distribución Goias (Formerly Celg Distribuicio S.A) | Amortization PPA [Member] | Deferred Tax Assets (Liabilities) [Member]      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance (682,399,000) (134,830,000)  
Movements, Recognized in profit or loss 563,517,000 12,105  
Movements, Acquisitions   (616,685,000)  
Movements, Foreign currency translation difference 13,646,000 54,726,000  
Movements, Other increases (decreases)   2,285,000  
Deferred Taxes Assets/(Liabilities), Net ending balance (105,236,000) (682,399,000) (134,830,000)
Enel Distribución Goias (Formerly Celg Distribuicio S.A) | Amortization PPA [Member] | Deferred Tax Assets (Liabilities) [Member] | As Restated      
Disclosure Of Income Taxes [Line Items]      
Deferred Taxes Assets/(Liabilities), Net beginning balance $ (682,399,000) (134,830,000)  
Deferred Taxes Assets/(Liabilities), Net ending balance   $ (682,399,000) $ (134,830,000)