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Royalty, Stream and Working Interests - Rollforward (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Royalty, stream and working interests    
Balance at beginning of year $ 4,027,100,000 $ 4,927,500,000
Additions 407,400,000 519,600,000
Disposal (10,600,000) (3,300,000)
Impairment losses 0 (1,173,300,000)
Depletion (223,000,000) (270,700,000)
Impact of foreign exchange (102,100,000) 27,300,000
Balance at end of year 4,098,800,000 4,027,100,000
Mining Royalties    
Royalty, stream and working interests    
Balance at beginning of year 948,700,000 865,800,000
Additions 140,300,000 37,700,000
Disposal (10,600,000)  
Transfers 44,000,000 71,300,000
Depletion (40,000,000) (40,200,000)
Impact of foreign exchange (48,100,000) 14,100,000
Balance at end of year 1,034,300,000 948,700,000
Streams    
Royalty, stream and working interests    
Balance at beginning of year 1,359,000,000 2,447,400,000
Additions 36,200,000 250,200,000
Impairment losses   (1,169,200,000)
Depletion (121,900,000) (169,400,000)
Balance at end of year 1,273,300,000 1,359,000,000
Energy    
Royalty, stream and working interests    
Balance at beginning of year 1,146,400,000 1,181,500,000
Additions 137,000,000 22,200,000
Impairment losses   (4,100,000)
Depletion (60,900,000) (60,800,000)
Impact of foreign exchange (24,700,000) 7,600,000
Balance at end of year 1,197,800,000 1,146,400,000
Advanced    
Royalty, stream and working interests    
Balance at beginning of year 396,000,000 371,000,000
Additions 8,900,000 99,300,000
Disposal   (3,300,000)
Transfers (36,200,000) (75,600,000)
Depletion (200,000) (300,000)
Impact of foreign exchange (25,100,000) 4,900,000
Balance at end of year 343,400,000 396,000,000
Exploration    
Royalty, stream and working interests    
Balance at beginning of year 177,000,000 61,800,000
Additions 85,000,000 110,200,000
Transfers (7,800,000) 4,300,000
Impact of foreign exchange (4,200,000) 700,000
Balance at end of year $ 250,000,000 $ 177,000,000