Royalty, Stream and Working Interests, Net - Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Royalty, Stream and Working Interests, Net
Balance at beginning of period	$ 3,939.2	$ 3,668.3
Acquisitions	988.6	499.5
Impairments	(76.0)
Depletion	(243.9)	(268.9)
Impact of foreign exchange	(52.3)	40.3
Balance at end of period	4,555.6	3,939.2
Mineral Royalties
Royalty, Stream and Working Interests, Net
Balance at beginning of period	486.1	488.0
Acquisitions	0.5
Transfers	16.4	42.1
Depletion	(42.5)	(52.3)
Impact of foreign exchange	(10.4)	8.3
Balance at end of period	450.1	486.1
Streams
Royalty, Stream and Working Interests, Net
Balance at beginning of period	2,575.4	2,502.2
Acquisitions	630.4	265.8
Impairments	(75.4)
Depletion	(162.8)	(192.6)
Balance at end of period	2,967.6	2,575.4
Energy
Royalty, Stream and Working Interests, Net
Balance at beginning of period	682.7	448.9
Acquisitions	354.5	232.7
Depletion	(37.3)	(23.0)
Impact of foreign exchange	(33.3)	24.1
Balance at end of period	966.6	682.7
Advanced
Royalty, Stream and Working Interests, Net
Balance at beginning of period	151.9	188.8
Acquisitions	1.8
Transfers	(16.4)	(43.2)
Depletion	(1.1)	(1.0)
Impact of foreign exchange	(6.4)	7.3
Balance at end of period	129.8	151.9
Exploration
Royalty, Stream and Working Interests, Net
Balance at beginning of period	43.1	40.4
Acquisitions	1.4	1.0
Transfers		1.1
Impairments	(0.6)
Depletion	(0.2)
Impact of foreign exchange	(2.2)	0.6
Balance at end of period	$ 41.5	$ 43.1

Acquisitions of property plant and equipment.

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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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No definition available.

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The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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- Definition

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

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