Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2015
Income Tax Disclosure [Abstract]  
Schedule of Income Tax Expense (Benefit) and Effective Tax Rate
The Company's income tax expense and effective tax rate from continuing operations for the three months ended March 31, 2015 and 2014 were as follows:
 
Three Months Ended March 31,
 
2015
 
2014
 
 
 
 
 
(dollars in millions)
Income tax expense
$
61

 
$
69

Effective tax rate
17
%
 
18
%
Schedule of Income Tax Expense (Benefit) associated with Unusual or Infrequent Items
The Company’s effective tax rate from continuing operations was also impacted by the tax expense (benefit) associated with unusual or infrequent items for the respective interim period as illustrated in the following table:
 
Three Months Ended March 31,
 
2015
 
2014
 
 
 
 
 
(in millions)
Other change in tax reserves (1)
$
1

 
$
(3
)
Other adjustments (2)
—

 
(1
)
Income tax expense (benefit) associated with unusual or infrequent items
$
1

 
$
(4
)

(1)
For the three months ended March 31, 2015 and March 31, 2014, the tax expense and benefits, respectively, primarily relate to adjustments in tax reserves which were individually insignificant.
(2)
For the three months ended March 31, 2014, the tax benefits primarily relate to provision to return adjustments and other items which were individually insignificant.