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

Acquisitions of property plant and equipment.

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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.

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- Definition

The amount of royalty, stream and working interests, net.

+ References

No definition available.

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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
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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.

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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
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- Definition

The increase (decrease) in property, plant and equipment resulting from transfers. [Refer: Property, plant and equipment]

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