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Employee Benefits
 3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Employee Benefits
  Note 10  Employee Benefits

The components of net periodic benefit cost for the Company’s retirement plans were:

 

    Three Months Ended March 31,  
    Pension Plans      Postretirement
Welfare Plan		  
(Dollars in Millions)       2016         2015          2016         2015  

Service cost

   $ 44      $ 47       $ –      $ –   

Interest cost

     52        48         1        1   

Expected return on plan assets

     (66 )      (56 )       –        –   

Prior service cost (credit) amortization

     (1 )      (1 )       (1 )      (1 ) 

Actuarial loss (gain) amortization

     44        59         (1 )      (1 ) 

Net periodic benefit cost

   $ 73      $ 97       $ (1 )    $ (1 )