Royalty, stream and working interests - Rollforward (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2021	Dec. 31, 2020
Royalty, stream and working interests
Balance at beginning of period	$ 4,632.1	$ 4,797.8
Additions (note 4)	724.7	315.8
Impairment (charges) and reversals	(7.5)	(258.1)
Depletion	(147.3)	(238.7)
Impact of foreign exchange	20.4	15.3
Balance at end of period	5,222.4	4,632.1
Mining Royalties
Royalty, stream and working interests
Balance at beginning of period	406.9	415.6
Additions (note 4)	540.0	18.8
Transfers		(1.2)
Depletion	(21.6)	(31.5)
Impact of foreign exchange	6.5	5.2
Balance at end of period	931.8	406.9
Streams
Royalty, stream and working interests
Balance at beginning of period	2,653.6	2,804.0
Additions (note 4)	165.6
Impairment (charges) and reversals		9.6
Depletion	(98.4)	(160.0)
Balance at end of period	2,720.8	2,653.6
Energy
Royalty, stream and working interests
Balance at beginning of period	1,214.6	1,353.6
Additions (note 4)	4.2	170.2
Impairment (charges) and reversals		(267.7)
Depletion	(27.0)	(44.9)
Impact of foreign exchange	7.8	3.4
Balance at end of period	1,199.6	1,214.6
Advanced
Royalty, stream and working interests
Balance at beginning of period	294.0	170.9
Additions (note 4)	14.9	118.6
Transfers		1.2
Impairment (charges) and reversals	(7.5)
Depletion	(0.3)	(2.1)
Impact of foreign exchange	5.6	5.4
Balance at end of period	306.7	294.0
Exploration
Royalty, stream and working interests
Balance at beginning of period	63.0	53.7
Additions (note 4)		8.2
Depletion		(0.2)
Impact of foreign exchange	0.5	1.3
Balance at end of period	$ 63.5	$ 63.0

Acquisitions of property plant and equipment.

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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

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

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The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment]

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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

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

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