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Postretirement Benefits (Tables)
9 Months Ended
Sep. 30, 2011
Postretirement Benefits 
Components of net periodic benefit cost for pension benefits

 

 

 

Erie Insurance Group

(in millions)

 

Three months ended
September 30,

 

Nine months ended
September 30,

 

 

2011

 

2010

 

2011

 

2010

Service cost

 

$ 4

 

$ 3

 

 

$ 13

 

$ 11

 

Interest cost

 

6

 

5

 

 

17

 

15

 

Expected return on plan assets

 

(7)

 

(6)

 

 

(20)

 

(19

)

Amortization of prior service cost

 

1

 

1

 

 

1

 

1

 

Amortization of actuarial loss

 

1

 

1

 

 

4

 

3

 

Net periodic benefit cost

 

$ 5

 

$ 4

 

 

$ 15

 

$ 11