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OTHER ASSETS
6 Months Ended
Jun. 30, 2022
Other Assets [Abstract]  
OTHER ASSETS
NOTE 6. OTHER ASSETS

Included in other assets were the following:
June 30, 2022December 31, 2021June 30, 2021
($ in millions)
Supply contracts$1,026.9 $1,061.8 $1,091.0 
Other63.1 70.0 74.9 
Other assets$1,090.0 $1,131.8 $1,165.9 
Amortization expense of $17.6 million and $17.3 million for the three months ended June 30, 2022 and 2021, respectively, and amortization expense of $35.2 million and $34.8 million for the six months ended June 30, 2022 and 2021, respectively, was recognized within cost of goods sold related to our long-term supply contracts and is reflected in depreciation and amortization on the condensed statements of cash flows.