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Other Financial Information
 6 Months Ended
Jun. 30, 2018
Additional Financial Information Disclosure [Abstract]  
Other Financial Information
Other Financial Information
Other Current Assets
The following table presents details of other current assets in our consolidated balance sheets:
 
June 30, 2018
 
December 31, 2017
 
(Dollars in millions)
Prepaid expenses
$
51

 
42

Deferred commissions
52

 
—

Deferred activation and installation charges
101

 
49

Other
18

 
7

Total other current assets
$
222

 
98