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GOODWILL (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill [Abstract]  
Schedule of Goodwill
The table below details changes in the goodwill balance:
$ in millionsNet Book Value
January 1, 20218,916.3 
Business combinations1.6 
Foreign exchange(35.4)
December 31, 20218,882.5 
January 1, 20208,509.4 
Business combinations285.8 
Foreign exchange121.1 
December 31, 20208,916.3