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Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2012
Postretirement Benefits  
Schedule of components of net periodic benefit cost for postretirement benefits

 

 

 

Erie Insurance Group

 

(in millions)

 

Three months ended
September 30,

 

Nine months ended
September 30,

 

 

 

2012

 

2011

 

  2012

 

2011

 

Service cost

 

$ 5

 

 

$ 4

 

 

$  16

 

 

$  13

 

 

Interest cost

 

6

 

 

6

 

 

18

 

 

17

 

 

Expected return on plan assets

 

(6

)

 

(7

)

 

(20

)

 

(20

)

 

Amortization of prior service cost

 

1

 

 

1

 

 

1

 

 

1

 

 

Amortization of actuarial loss

 

2

 

 

1

 

 

8

 

 

4

 

 

Net periodic benefit cost

 

$ 8

 

 

$ 5

 

 

$  23

 

 

$  15