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Retirement Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2012
Compensation and Retirement Disclosure [Abstract]  
Retirement benefit plans expense
The components of retirement benefits expense follow:
 
Three months ended March 31
 
United States
pension benefit expense
 
Non-United States
pension benefit expense
 
Other postretirement
benefits expense
 
2012
 
2011
 
2012
 
2011
 
2012
 
2011
Service cost
$
29

 
$
23

 
$
12

 
$
13

 
$
4

 
$
4

Interest cost
34

 
33

 
19

 
20

 
9

 
10

Expected return on plan assets
(45
)
 
(41
)
 
(19
)
 
(18
)
 
(1
)
 
—

Amortization
29

 
19

 
4

 
3

 
4

 
3

 
47

 
34

 
16

 
18

 
16

 
17

Settlement loss
4

 
3

 
2

 
—

 
—

 
—

Total expense
$
51

 
$
37

 
$
18

 
$
18

 
$
16

 
$
17