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Revenues (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
SuccessorPredecessor
Period FromPeriod From
12/14/20191/1/2019
Year EndedYear Endedthroughthrough
(Dollars in millions)12/31/202112/31/202012/31/201912/13/2019
Revenues by Geographic Areas:
North America$896 $889 $68 1,548 
Latin America814 697 53 1,072 
Europe/Sub-Sahara Africa/Russia737 747 52 $907 
Middle East/North Africa/Asia1,198 1,352 88 1,427 
Total Revenues$3,645 $3,685 $261 $4,954 
Schedule of Contract with Customer, Asset and Liability The following table summarizes these balances at December 31, 2021 and December 31, 2020:
(Dollars in millions)12/31/202112/31/2020
Total Accounts Receivables, Net$825 $826 
Receivables for Product and Services in Accounts Receivable, Net$795 $792 
Receivables for Equipment Rentals in Account Receivable, Net$30 $34 
Contract Liabilities included in Other Current Liabilities$26 $37 
Schedule of Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction In the following table, estimated revenue for contracts with original performance obligations greater than twelve months are expected to be recognized in the future related to performance obligations that are either unsatisfied or partially unsatisfied as of December 31, 2021.
(Dollars in millions)2022202320242025ThereafterTotal
Service revenue$67 $59 $59 $44 $20 $249