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Accounts Receivable (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Receivables [Abstract]    
Schedule of Accounts Receivable
Accounts receivable consist of the following:
(Dollars in millions)June 30, 2022December 31, 2021
Accounts receivable$126 $157 
Less allowance for credit losses(1)(1)
Accounts receivable, net
$125 $156 
Accounts receivable consist of the following:
December 31,
(Dollars in millions)20212020
Accounts receivable$157 $104 
Less allowance for doubtful accounts(1)(2)
Accounts receivable, net
$156 $102