XML 103 R27.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Expenses by Nature (Notes) | 12 Months Ended
--- | ---
Dec. 31, 2019
Analysis of income and expense [abstract] |
Expenses by Nature | Expenses by Nature Expenses classified by nature are as follows:
Year ended Dec. 31 | 2019 |  | 2018 |  | 2017 |
| Fuel and purchased power | Operations, maintenance and administration | Fuel and purchased power | Operations, maintenance and administration | Fuel and purchased power | Operations, maintenance and administration
Fuel(1) | 669 |  | — |  | 656 |  | — |  | 685 |  | — |
Purchased power | 246 |  | — |  | 210 |  | — |  | 162 |  | — |
Mine depreciation | 119 |  | — |  | 136 |  | — |  | 73 |  | — |
Salaries and benefits(1) | 52 |  | 228 |  | 98 |  | 245 |  | 96 |  | 248 |
Other operating expenses | — |  | 247 |  | — |  | 270 |  | — |  | 269 |
Total | 1,086 |  | 475 |  | 1,100 |  | 515 |  | 1,016 |  | 517 |
(1) $90 million in 2017 was reclassified from fuel to salaries and benefits to be consistent with the 2018 and 2019 classifications.

X
- References No definition available. + Details
Name: | ifrs-full_AnalysisOfIncomeAndExpenseAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of expenses by nature. [Refer: Expenses, by nature] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfExpensesByNatureExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration