PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant and Equipment Measured at Fair Value (Details)

Dec. 31, 2020

USD ($)

Dec. 31, 2020

BRL (R$)

Dec. 31, 2020

COP ($)

Dec. 31, 2020

EUR (€)

Dec. 31, 2019

USD ($)

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

$ 100,009,000,000

$ 89,264,000,000

Infrastructure

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

32,167,000,000

23,772,000,000

Renewable Power

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

45,206,000,000

41,595,000,000

Renewable Power | North America

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

$ 28,044,000,000

25,617,000,000

Renewable Power | North America | Later Than One Year And Not Later Than Eleven Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

43.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average)

$ 96

Estimates of Future Electricity Prices (weighted average)

$ 65

Renewable Power | North America | Later Than Eleven Years And Not Later Than Twenty Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

13.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average)

$ 90

Estimates of Future Electricity Prices (weighted average)

117

Renewable Power | Brazil

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

$ 3,005,000,000

3,575,000,000

Renewable Power | Brazil | Later Than One Year And Not Later Than Eleven Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

70.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average) | R$

R$ 306

Estimates of Future Electricity Prices (weighted average) | R$

R$ 245

Renewable Power | Brazil | Later Than Eleven Years And Not Later Than Twenty Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

30.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average) | R$

R$ 396

Estimates of Future Electricity Prices (weighted average) | R$

R$ 328

Renewable Power | Colombia

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

$ 8,150,000,000

7,353,000,000

Renewable Power | Colombia | Later Than One Year And Not Later Than Eleven Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

27.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average)

$ 220,000

Estimates of Future Electricity Prices (weighted average)

$ 265,000

Renewable Power | Colombia | Later Than Eleven Years And Not Later Than Twenty Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

0.00%

Estimates of Future Electricity Prices (weighted average)

$ 384,000

Renewable Power | Europe

Disclosure of detailed information about property, plant and equipment [line items]

Property, plant and equipment

$ 4,912,000,000

$ 3,770,000,000

Renewable Power | Europe | Later Than One Year And Not Later Than Eleven Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

87.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average) | €

€ 167

Estimates of Future Electricity Prices (weighted average) | €

€ 68

Renewable Power | Europe | Later Than Eleven Years And Not Later Than Twenty Years

Disclosure of detailed information about property, plant and equipment [line items]

Total Generation Contracted under Power Purchase Agreements

56.00%

Power Prices from Long-Term Power Purchase Agreements (weighted average) | €

€ 255

Estimates of Future Electricity Prices (weighted average) | €

€ 54