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Borrowings and Other Obligations (Tables)
3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Short-term Debt and Other Debt Obligations
(Dollars in millions)March 31, 2022December 31, 2021
Finance Leases Current Portion$13 $12 
Short-term Borrowings and Current Portion of Finance Leases$13 $12 
11.00% Exit Notes due 2024
$300 $300 
6.50% Senior Secured Notes due 2028
489 488 
8.625% Senior Notes due 2030
1,584 1,584 
Finance Leases Long-term Portion43 44 
Long-term Debt$2,416 $2,416 
Fair Value,of Short and Long-term Borrowings
March 31, 2022December 31, 2021
(Dollars in millions)Carrying ValueFair ValueCarrying ValueFair Value
11.00% Exit Notes due 2024
$300 $311 $300 $311 
6.50% Senior Secured Notes due 2028
489 516 488 528 
8.625% Senior Notes due 2030
1,584 1,628 1,584 1,660 
Long-Term Debt (excluding Finance Leases)$2,373 $2,455 $2,372 $2,499