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Other Financial Information
 9 Months Ended
Sep. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Financial Information Other Financial Information
Other Current Assets

The following table presents details of other currents assets in our consolidated balance sheets:

September 30, 2021December 31, 2020
(Dollars in millions)
Prepaid expenses$45 40
Contract acquisition costs44 47
Contract fulfillment costs30 28
Receivable for sale of land56 — 
Other5 7
Total other current assets$180 122
Other Noncurrent Liabilities

The following table presents details of other noncurrent liabilities in our consolidated balance sheets:

September 30, 2021December 31, 2020
(Dollars in millions)
Unrecognized tax benefits$459 448
Deferred revenue110 108
Noncurrent operating lease liability64 76
Other61 53
Total other noncurrent liabilities$694 685