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Royalty, Stream and Working Interests - Rollforward (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Royalty, stream and working interests    
Balance at beginning of period $ 4,927.5 $ 5,149.3
Additions 519.6 138.4
Disposal (3.3)  
Impairment losses (1,173.3)  
Depletion (270.7) (284.0)
Impact of foreign exchange 27.3 (76.2)
Balance at end of period 4,027.1 4,927.5
Mining Royalties    
Royalty, stream and working interests    
Balance at beginning of period 865.8 903.0
Additions 37.7 44.1
Transfers 71.3  
Depletion (40.2) (40.2)
Impact of foreign exchange 14.1 (41.1)
Balance at end of period 948.7 865.8
Streams    
Royalty, stream and working interests    
Balance at beginning of period 2,447.4 2,623.0
Additions 250.2 1.6
Impairment losses (1,169.2)  
Depletion (169.4) (177.2)
Balance at end of period 1,359.0 2,447.4
Energy    
Royalty, stream and working interests    
Balance at beginning of period 1,181.5 1,258.3
Additions 22.2 12.1
Impairment losses (4.1)  
Depletion (60.8) (66.4)
Impact of foreign exchange 7.6 (22.5)
Balance at end of period 1,146.4 1,181.5
Advanced    
Royalty, stream and working interests    
Balance at beginning of period 371.0 308.8
Additions 99.3 72.7
Disposal (3.3)  
Transfers (75.6)  
Depletion (0.3) (0.2)
Impact of foreign exchange 4.9 (10.3)
Balance at end of period 396.0 371.0
Exploration    
Royalty, stream and working interests    
Balance at beginning of period 61.8 56.2
Additions 110.2 7.9
Transfers 4.3  
Impact of foreign exchange 0.7 (2.3)
Balance at end of period $ 177.0 $ 61.8