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Employee Retirement Benefits (Tables)
12 Months Ended
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Pre- and Post-tax Amounts Recognized in AOCI [Table Text Block]
The following table displays the changes in the pre-tax and after-tax amounts recognized in AOCI that have not been recognized as a component of net periodic benefit cost for the years ended December 31, 2014 and 2013.
 
 
 
For the Year Ended
 
2014
 
2013
 
(Dollars in millions)
Actuarial Loss:
 
 
 
 
 
Beginning balance
 
$
338

 
$
499

 
Current year actuarial gain
 
(16
)
 
(236
)
 
Actuarial gain due to curtailment
 

 
(135
)
 
Actuarial loss due to plan amendment(1)
 

 
226

 
Amortization
 
(6
)
 
(16
)
 
Ending balance recorded in AOCI (Pre-tax)
 
$
316

 
$
338

 
After-tax balance recorded in AOCI
 
$
391

 
$
406

 

__________
(1)
Primarily includes the incremental costs incurred due to risk premiums required by insurance carriers to provide annuities and the higher actuarial value of lump sums distributed earlier than previously expected retirement ages.