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Employee Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2012
Net Periodic Pension Cost for Defined-Benefit Pension Plans
     Net periodic pension cost for the Company’s defined-benefit pension plans was as follows, in millions:

 

     Three Months Ended September 30,  
     2012      2011  
     Qualified     Non-Qualified      Qualified     Non-Qualified  

Service cost

    $ 1      $ —         $ 1      $ —     

Interest cost

      12        2         12        2   

Expected return on plan assets

      (10 )      —           (9 )      —     

Amortization of net loss

      4        —           2        1   

Net periodic pension cost

    $ 7      $ 2         6        3   
     Nine Months Ended September 30,  
     2012      2011  
     Qualified     Non-Qualified      Qualified     Non-Qualified  

Service cost

    $ 4      $ —         $ 2      $ —     

Interest cost

      32        5         34        6   

Expected return on plan assets

      (27 )      —           (25 )      —     

Amortization of net loss

      11        1         7        1   

Net periodic pension cost

    $ 20      $ 6       $ 18      $ 7