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OTHER ASSETS (Tables)
 9 Months Ended
Sep. 30, 2022
Other Assets [Abstract]  
Schedule of Other Assets
Included in other assets were the following:
September 30, 2022December 31, 2021September 30, 2021
($ in millions)
Supply contracts$1,013.8 $1,061.8 $1,076.8 
Other76.9 70.0 75.6 
Other assets$1,090.7 $1,131.8 $1,152.4