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Share Repurchase Transactions and Other Comprehensive Loss (Tables)
3 Months Ended
Mar. 31, 2020
Federal Home Loan Banks [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are as follows (dollars in millions):
 
Unrealized
Gains on
Available-
for-Sale

Securities
 
 
Foreign
Currency
Translation
Adjustments
 
 
Defined
Benefit
Plans
 
 
Change
in Fair
Value of
Derivative
Instruments
 
 
Total
 
Balances at December 31, 2019
  $
14
    $
(283
)   $
(187
)   $
(4
)   $
(460
)
Unrealized losses on
available-for-sale
securities, net of $1 income tax benefit
   
(4
)    
     
     
     
(4
)
Foreign currency translation adjustments, net of $9 income tax benefit
   
     
(64
)    
     
     
(64
)
Change in fair value of derivative instruments, net of $14 income tax benefit
   
     
     
     
(46
)    
(46
)
Expense (income) reclassified into operations from other comprehensive income, net of $1 income tax benefit and $1 of income taxes, respectively
   
     
     
3
     
     
3
 
                                         
Balances at March 31, 2020
  $
10
    $
(347
)   $
(184
)   $
(50
)   $
(571
)