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OTHER ASSETS (Tables)
9 Months Ended
Sep. 30, 2020
Other Assets [Abstract]  
Schedule of Other Assets
Included in other assets were the following:
 
September 30, 2020
 
December 31, 2019
 
September 30, 2019
 
($ in millions)
Supply contracts
$
1,129.7

 
$
1,112.6

 
$
1,122.0

Other
47.3

 
56.5

 
48.1

Other assets
$
1,177.0

 
$
1,169.1

 
$
1,170.1