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Employee Benefits
9 Months Ended
Sep. 30, 2018
Retirement Benefits [Abstract]  
Employee Benefits
 Note 10      Employee Benefits

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

 

    Three Months Ended September 30             Nine Months Ended September 30  
    Pension Plans     Postretirement
Welfare Plan
            Pension Plans     Postretirement
Welfare Plan
 
(Dollars in Millions)       2018         2017         2018         2017                 2018         2017         2018         2017  

Service cost

  $ 52     $ 47     $     $          $ 156     $ 140     $     $  

Interest cost

    56       55                        168       165       1       2  

Expected return on plan assets

    (95     (71           (1          (284     (213     (2     (2

Prior service cost (credit) amortization

                (1     (1                (1     (2     (3

Actuarial loss (gain) amortization

    36       31       (1     (1              109       95       (4     (4

Net periodic benefit cost (a)

  $ 49     $ 62     $ (2   $ (3            $ 149     $ 186     $ (7   $ (7

 

(a)

Service cost is included in employee benefits expense on the Consolidated Statement of Income. All other components are included in other noninterest expense on the Consolidated Statement of Income.