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Royalty, Stream and Working Interests - Rollforward (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Royalty, stream and working interests    
Balance at beginning of period $ 4,927.5 $ 5,149.3
Additions 272.2 138.4
Disposal (3.3)  
Depletion (135.0) (284.0)
Impact of foreign exchange 25.2 (76.2)
Balance at end of period 5,086.6 4,927.5
Mining Royalties    
Royalty, stream and working interests    
Balance at beginning of period 865.8 903.0
Additions 9.6 44.1
Transfers 71.6  
Depletion (19.9) (40.2)
Impact of foreign exchange 14.5 (41.1)
Balance at end of period 941.6 865.8
Streams    
Royalty, stream and working interests    
Balance at beginning of period 2,447.4 2,623.0
Additions 184.3 1.6
Depletion (83.3) (177.2)
Impact of foreign exchange (0.1)  
Balance at end of period 2,548.3 2,447.4
Energy    
Royalty, stream and working interests    
Balance at beginning of period 1,181.5 1,258.3
Additions 5.9 12.1
Depletion (31.6) (66.4)
Impact of foreign exchange 7.3 (22.5)
Balance at end of period 1,163.1 1,181.5
Advanced    
Royalty, stream and working interests    
Balance at beginning of period 371.0 308.8
Additions 57.4 72.7
Disposal (3.3)  
Transfers (71.6)  
Depletion (0.2) (0.2)
Impact of foreign exchange 3.0 (10.3)
Balance at end of period 356.3 371.0
Exploration    
Royalty, stream and working interests    
Balance at beginning of period 61.8 56.2
Additions 15.0 7.9
Impact of foreign exchange 0.5 (2.3)
Balance at end of period $ 77.3 $ 61.8