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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Summary of Data Related to our Transactions with U.S. and U.K. Governmental Agencies
The following tables present summarized data related to our transactions with U.S. and U.K governmental agencies.
Revenues and percentage of consolidated revenues from major customers:
 Years ended December 31,
Dollars in millions202120202019
U.S. government$5,122 70 %$3,079 53 %$3,014 53 %
U.K. government$508 7 %$573 10 %$659 12 %
Accounts receivable and percentage of consolidated accounts receivable from major customers:
 December 31,
Dollars in millions20212020
U.S. government$1,062 75 %$501 56 %
U.K. government$81 6 %$47 5 %
Schedule of Other Current Assets The components of other current assets on our consolidated balance sheets as of December 31, 2021 and 2020 are presented below: 
 December 31,
Dollars in millions20212020
Prepaid expenses$75 $71 
Value-added tax receivable21 22 
Advances to subcontractors15 10 
Other miscellaneous assets36 18 
Total other current assets$147 $121 
Components of Other Current Liabilities The components of other current liabilities on our consolidated balance sheets as of December 31, 2021 and 2020 are presented below:
 December 31,
Dollars in millions20212020
Current maturities of long-term debt$16 $12 
Reserve for estimated losses on uncompleted contracts17 16 
Retainage payable13 22 
Income taxes payable2 16 
Restructuring reserve17 32 
Value-added tax payable34 29 
Dividend payable16 14 
Other miscellaneous liabilities63 52 
Total other current liabilities$178 $193