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BUSINESS COMBINATIONS (Tables)
 12 Months Ended
Dec. 31, 2021
Business Combinations [Abstract]  
Schedule of Pro Forma Information
The following unaudited pro forma summary presents consolidated information of the company as if the business combination had occurred on January 1, 2019, the earliest period presented herein.
For the year ended December 31,
$ in millions2019
Operating revenues6,935.1 
Net income683.4