XML 102 R74.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Significant Accounting Policies (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Coal generation | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 2 years
Coal generation | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 12 years
Gas generation | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 2 years
Gas generation | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 30 years
Hydro | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 3 years
Hydro | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 60 years
Wind Generation | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 3 years
Wind Generation | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 30 years
Mining property and equipment | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 2 years
Mining property and equipment | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 12 years
Capital spares and other | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 2 years
Capital spares and other | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life |  | 30 years
Facilities | Minimum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life | 30 years |
Facilities | Maximum |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
PP&E useful life | 60 years |
Computer software | Minimum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets, useful life |  | 2 years
Computer software | Maximum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets, useful life |  | 7 years
Power sale contracts | Minimum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets, useful life |  | 5 years
Power sale contracts | Maximum |  |
Disclosure of detailed information about intangible assets [line items] |  |
Intangible assets, useful life |  | 20 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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