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Royalty, stream and working interests - Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Royalty, stream and working interests |  |
Balance at beginning of period | $ 4,797.8 | $ 4,555.6
Additions (note 4) | 315.8 | 476.9
Impairment (charges) and reversals | (258.1) |
Depletion | (238.7) | (259.7)
Impact of foreign exchange | 15.3 | 25.0
Balance at end of period | 4,632.1 | 4,797.8
Mineral Royalties |  |
Royalty, stream and working interests |  |
Balance at beginning of period | 415.6 | 450.1
Additions (note 4) | 18.8 |
Transfers | (1.2) | 5.9
Depletion | (31.5) | (46.0)
Impact of foreign exchange | 5.2 | 5.6
Balance at end of period | 406.9 | 415.6
Streams |  |
Royalty, stream and working interests |  |
Balance at beginning of period | 2,804.0 | 2,967.6
Impairment (charges) and reversals | 9.6 |
Depletion | (160.0) | (163.6)
Balance at end of period | 2,653.6 | 2,804.0
Energy |  |
Royalty, stream and working interests |  |
Balance at beginning of period | 1,353.6 | 966.6
Additions (note 4) | 170.2 | 419.0
Impairment (charges) and reversals | (267.7) |
Depletion | (44.9) | (49.0)
Impact of foreign exchange | 3.4 | 17.0
Balance at end of period | 1,214.6 | 1,353.6
Advanced |  |
Royalty, stream and working interests |  |
Balance at beginning of period | 170.9 | 129.8
Additions (note 4) | 118.6 | 46.0
Transfers | 1.2 | (5.9)
Depletion | (2.1) | (0.9)
Impact of foreign exchange | 5.4 | 1.9
Balance at end of period | 294.0 | 170.9
Exploration |  |
Royalty, stream and working interests |  |
Balance at beginning of period | 53.7 | 41.5
Additions (note 4) | 8.2 | 11.9
Depletion | (0.2) | (0.2)
Impact of foreign exchange | 1.3 | 0.5
Balance at end of period | $ 63.0 | $ 53.7

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- Definition The amount of impairment loss (reversals) recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References No definition available. + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_75_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause viii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_viii&doctype=Standard -URIDate 2020-01-01 + Details
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