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Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2012
Compensation and Retirement Disclosure [Abstract]  
Components of net periodic benefit cost and other changes in plan assets and benefit obligations
The components of Net periodic benefit cost and other changes in plan assets and benefit obligations were as follows:
 
 
Pension Benefits
 
Retiree Health
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
Components of Net Periodic Benefit Costs:
Service cost
$
46

 
$
46

 
$
97

 
$
94

 
$
2

 
$
2

 
$
4

 
$
4

Interest cost
113

 
121

 
228

 
239

 
11

 
12

 
22

 
24

Expected return on plan assets
(128
)
 
(130
)
 
(257
)
 
(257
)
 
—

 
—

 
—

 
—

Recognized net actuarial loss
26

 
19

 
53

 
36

 
1

 
—

 
1

 
—

Amortization of prior service credit
(5
)
 
(6
)
 
(11
)
 
(12
)
 
(11
)
 
(10
)
 
(21
)
 
(20
)
Recognized settlement loss
14

 
20

 
30

 
50

 
—

 
—

 
—

 
—

Defined benefit plans
66

 
70

 
140

 
150

 
3

 
4

 
6

 
8

Defined contribution plans
15

 
16

 
31

 
32

 
—

 
—

 
—

 
—

Net periodic benefit cost
81

 
86

 
171

 
182

 
3

 
4

 
6

 
8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
Net actuarial gain
(18
)
 
(9
)
 
(19
)
 
(9
)
 
—

 
—

 
—

 
—

Amortization of net prior service credit
5

 
6

 
11

 
12

 
11

 
10

 
21

 
20

Amortization of net actuarial losses
(40
)
 
(39
)
 
(83
)
 
(86
)
 
(1
)
 
—

 
(1
)
 
—

Total recognized in Other Comprehensive Income(1)
(53
)
 
(42
)
 
(91
)
 
(83
)
 
10

 
10

 
20

 
20

Total recognized in Net Periodic Benefit Cost and Other Comprehensive Income
$
28

 
$
44

 
$
80

 
$
99

 
$
13

 
$
14

 
$
26

 
$
28

_____________________________
(1)
Amounts represent the pre-tax effect included within Other comprehensive income. Refer to Note 14 - Comprehensive Income for related tax effects and the after-tax amounts.